Merge branch 'DragonRuby:master' into masterHEADmaster

29 files changed, 1086 insertions, 133 deletions

diff --git a/samples/07_advanced_rendering/00_labels_with_wrapped_text/app/main.rb b/samples/07_advanced_rendering/00_labels_with_wrapped_text/app/main.rb
new file mode 100644
index 0000000..71eefa9
--- /dev/null
+++ b/samples/07_advanced_rendering/00_labels_with_wrapped_text/app/main.rb
@@ -0,0 +1,88 @@
+def tick args
+  # defaults
+  args.state.scroll_location  ||= 0
+  args.state.textbox.messages ||= []
+  args.state.textbox.scroll   ||= 0
+
+  # render
+  args.outputs.background_color = [0, 0, 0, 255]
+  render_messages args
+  render_instructions args
+
+  # inputs
+  if args.inputs.keyboard.key_down.one
+    queue_message args, "Hello there neighbour! my name is mark, how is your day today?"
+  end
+
+  if args.inputs.keyboard.key_down.two
+    queue_message args, "I'm doing great sir, actually I'm having a picnic today"
+  end
+
+  if args.inputs.keyboard.key_down.three
+    queue_message args, "Well that sounds wonderful!"
+  end
+
+  if args.inputs.keyboard.key_down.home
+    args.state.scroll_location = 1
+  end
+
+  if args.inputs.keyboard.key_down.delete
+    clear_message_queue args
+  end
+end
+
+def queue_message args, msg
+  args.state.textbox.messages.concat msg.wrapped_lines 50
+end
+
+def clear_message_queue args
+  args.state.textbox.messages = nil
+  args.state.textbox.scroll = 0
+end
+
+def render_messages args
+  args.outputs[:textbox].w = 400
+  args.outputs[:textbox].h = 720
+
+  args.outputs.primitives << args.state.textbox.messages.each_with_index.map do |s, idx|
+    {
+      x: 0,
+      y: 20 * (args.state.textbox.messages.size - idx) + args.state.textbox.scroll * 20,
+      text: s,
+      size_enum: -3,
+      alignment_enum: 0,
+      r: 255, g:255, b: 255, a: 255
+    }
+  end
+
+  args.outputs[:textbox].labels << args.state.textbox.messages.each_with_index.map do |s, idx|
+    {
+      x: 0,
+      y: 20 * (args.state.textbox.messages.size - idx) + args.state.textbox.scroll * 20,
+      text: s,
+      size_enum: -3,
+      alignment_enum: 0,
+      r: 255, g:255, b: 255, a: 255
+    }
+  end
+
+  args.outputs[:textbox].borders << [0, 0, args.outputs[:textbox].w, 720]
+
+  args.state.textbox.scroll += args.inputs.mouse.wheel.y unless args.inputs.mouse.wheel.nil?
+
+  if args.state.scroll_location > 0
+    args.state.textbox.scroll = 0
+    args.state.scroll_location = 0
+  end
+
+  args.outputs.sprites << [900, 0, args.outputs[:textbox].w, 720, :textbox]
+end
+
+def render_instructions args
+  args.outputs.labels << [30,
+                          30.from_top,
+                          "press 1, 2, 3 to display messages, MOUSE WHEEL to scroll, HOME to go to top, BACKSPACE to delete.",
+                          0, 255, 255]
+
+  args.outputs.primitives << [0, 55.from_top, 1280, 30, :pixel, 0, 255, 0, 0, 0].sprite
+end
diff --git a/samples/07_advanced_rendering/00_labels_with_wrapped_text/replay.txt b/samples/07_advanced_rendering/00_labels_with_wrapped_text/replay.txt
new file mode 100644
index 0000000..8153881
--- /dev/null
+++ b/samples/07_advanced_rendering/00_labels_with_wrapped_text/replay.txt
@@ -0,0 +1,93 @@
+replay_version 2.0
+stopped_at 461
+seed 100
+recorded_at 2021-11-20 11:11:30 -0600
+[:mouse_button_up, 1, 0, 1, 1, 5]
+[:mouse_move, 789, 84, 2, 2, 33]
+[:mouse_move, 790, 84, 2, 3, 35]
+[:mouse_move, 791, 84, 2, 4, 37]
+[:key_down_raw, 49, 0, 2, 5, 72]
+[:key_up_raw, 49, 0, 2, 6, 78]
+[:key_down_raw, 50, 0, 2, 7, 90]
+[:key_up_raw, 50, 0, 2, 8, 97]
+[:mouse_move, 789, 85, 2, 9, 108]
+[:mouse_move, 784, 86, 2, 10, 109]
+[:mouse_move, 780, 88, 2, 11, 110]
+[:mouse_move, 780, 89, 2, 12, 112]
+[:mouse_move, 780, 90, 2, 13, 114]
+[:mouse_move, 780, 91, 2, 14, 115]
+[:key_down_raw, 49, 0, 2, 15, 123]
+[:key_up_raw, 49, 0, 2, 16, 131]
+[:key_down_raw, 49, 0, 2, 17, 150]
+[:key_up_raw, 49, 0, 2, 18, 157]
+[:key_down_raw, 50, 0, 2, 19, 161]
+[:key_up_raw, 50, 0, 2, 20, 169]
+[:key_down_raw, 51, 0, 2, 21, 179]
+[:key_up_raw, 51, 0, 2, 22, 186]
+[:mouse_move, 780, 92, 2, 23, 186]
+[:mouse_move, 781, 92, 2, 24, 187]
+[:mouse_move, 777, 92, 2, 25, 225]
+[:mouse_move, 769, 94, 2, 26, 226]
+[:mouse_move, 761, 96, 2, 27, 227]
+[:mouse_move, 759, 97, 2, 28, 228]
+[:mouse_move, 760, 99, 2, 29, 231]
+[:mouse_move, 762, 101, 2, 30, 232]
+[:mouse_move, 768, 112, 2, 31, 233]
+[:mouse_move, 769, 112, 2, 32, 234]
+[:mouse_wheel, 0, 1, 2, 33, 234]
+[:mouse_move, 769, 113, 2, 34, 234]
+[:mouse_wheel, 0, 2, 2, 35, 235]
+[:mouse_move, 770, 114, 2, 36, 235]
+[:mouse_wheel, 0, 4, 2, 37, 236]
+[:mouse_move, 771, 115, 2, 38, 237]
+[:mouse_wheel, 0, 6, 2, 39, 237]
+[:mouse_move, 771, 116, 2, 40, 239]
+[:mouse_wheel, 0, 7, 2, 41, 239]
+[:mouse_move, 772, 119, 2, 42, 240]
+[:mouse_move, 773, 120, 2, 43, 241]
+[:mouse_move, 773, 121, 2, 44, 242]
+[:mouse_move, 774, 121, 2, 45, 243]
+[:mouse_move, 774, 122, 2, 46, 244]
+[:mouse_move, 775, 124, 2, 47, 246]
+[:mouse_move, 780, 132, 2, 48, 247]
+[:mouse_move, 784, 142, 2, 49, 248]
+[:mouse_move, 788, 149, 2, 50, 249]
+[:mouse_move, 789, 150, 2, 51, 250]
+[:mouse_move, 789, 151, 2, 52, 251]
+[:mouse_move, 790, 151, 2, 53, 252]
+[:mouse_move, 790, 152, 2, 54, 262]
+[:mouse_wheel, 0, 1, 2, 55, 273]
+[:mouse_wheel, 0, 1, 2, 56, 274]
+[:mouse_wheel, 0, 4, 2, 57, 275]
+[:mouse_wheel, 0, 6, 2, 58, 277]
+[:mouse_move, 790, 151, 2, 59, 288]
+[:mouse_wheel, 0, -1, 2, 60, 297]
+[:mouse_wheel, 0, -1, 2, 61, 299]
+[:mouse_wheel, 0, -4, 2, 62, 300]
+[:mouse_wheel, 0, -6, 2, 63, 301]
+[:mouse_wheel, 0, -1, 2, 64, 317]
+[:mouse_wheel, 0, -1, 2, 65, 318]
+[:mouse_wheel, 0, -4, 2, 66, 319]
+[:mouse_wheel, 0, -6, 2, 67, 320]
+[:mouse_wheel, 0, -7, 2, 68, 321]
+[:mouse_move, 791, 151, 2, 69, 322]
+[:key_down_raw, 49, 0, 2, 70, 339]
+[:key_up_raw, 49, 0, 2, 71, 343]
+[:mouse_move, 791, 150, 2, 72, 343]
+[:key_down_raw, 49, 0, 2, 73, 348]
+[:key_up_raw, 49, 0, 2, 74, 351]
+[:key_down_raw, 49, 0, 2, 75, 356]
+[:key_up_raw, 49, 0, 2, 76, 361]
+[:key_down_raw, 96, 0, 2, 77, 388]
+[:mouse_move, 792, 150, 2, 78, 389]
+[:key_up_raw, 96, 0, 2, 79, 392]
+[:mouse_move, 792, 149, 2, 80, 394]
+[:mouse_move, 787, 157, 2, 81, 418]
+[:mouse_move, 776, 165, 2, 82, 419]
+[:mouse_move, 768, 168, 2, 83, 420]
+[:mouse_move, 766, 168, 2, 84, 421]
+[:mouse_move, 767, 168, 2, 85, 424]
+[:mouse_move, 772, 168, 2, 86, 425]
+[:mouse_move, 777, 168, 2, 87, 426]
+[:mouse_move, 778, 168, 2, 88, 427]
+[:key_down_raw, 13, 0, 2, 89, 461]
diff --git a/samples/07_advanced_rendering/00_rotating_label/app/main.rb b/samples/07_advanced_rendering/00_rotating_label/app/main.rb
new file mode 100644
index 0000000..8b21fb8
--- /dev/null
+++ b/samples/07_advanced_rendering/00_rotating_label/app/main.rb
@@ -0,0 +1,32 @@
+def tick args
+  # set the render target width and height to match the label
+  args.outputs[:scene].w = 220
+  args.outputs[:scene].h = 30
+
+
+  # make the background transparent
+  args.outputs[:scene].background_color = [255, 255, 255, 0]
+
+  # set the blendmode of the label to 0 (no blending)
+  # center it inside of the scene
+  # set the vertical_alignment_enum to 1 (center)
+  args.outputs[:scene].labels  << { x: 0,
+                                    y: 15,
+                                    text: "label in render target",
+                                    blendmode_enum: 0,
+                                    vertical_alignment_enum: 1 }
+
+  # add a border to the render target
+  args.outputs[:scene].borders << { x: 0,
+                                    y: 0,
+                                    w: args.outputs[:scene].w,
+                                    h: args.outputs[:scene].h }
+
+  # add the rendertarget to the main output as a sprite
+  args.outputs.sprites << { x: 640 - args.outputs[:scene].w.half,
+                            y: 360 - args.outputs[:scene].h.half,
+                            w: args.outputs[:scene].w,
+                            h: args.outputs[:scene].h,
+                            angle: args.state.tick_count,
+                            path: :scene }
+end
diff --git a/samples/07_advanced_rendering/02_render_targets_with_alphas/app/main.rb b/samples/07_advanced_rendering/02_render_targets_with_alphas/app/main.rb
deleted file mode 100644
index 2caec43..0000000
--- a/samples/07_advanced_rendering/02_render_targets_with_alphas/app/main.rb
+++ /dev/null
@@ -1,95 +0,0 @@
-# This sample is meant to show you how to do that dripping transition thing
-#  at the start of the original Doom. Most of this file is here to animate
-#  a scene to wipe away; the actual wipe effect is in the last 20 lines or
-#  so.
-
-$gtk.reset   # reset all game state if reloaded.
-
-def circle_of_blocks pass, xoffset, yoffset, angleoffset, blocksize, distance
-  numblocks = 10
-
-  for i in 1..numblocks do
-    angle = ((360 / numblocks) * i) + angleoffset
-    radians = angle * (Math::PI / 180)
-    x = (xoffset + (distance * Math.cos(radians))).round
-    y = (yoffset + (distance * Math.sin(radians))).round
-    pass.solids << [ x, y, blocksize, blocksize, 255, 255, 0 ]
-  end
-end
-
-def draw_scene args, pass
-  pass.solids << [0, 360, 1280, 360, 0, 0, 200]
-  pass.solids << [0, 0, 1280, 360, 0, 127, 0]
-
-  blocksize = 100
-  angleoffset = args.state.tick_count * 2.5
-  centerx = (1280 - blocksize) / 2
-  centery = (720 - blocksize) / 2
-
-  circle_of_blocks pass, centerx, centery, angleoffset, blocksize * 2, 500
-  circle_of_blocks pass, centerx, centery, angleoffset, blocksize, 325
-  circle_of_blocks pass, centerx, centery, angleoffset, blocksize / 2, 200
-  circle_of_blocks pass, centerx, centery, angleoffset, blocksize / 4, 100
-end
-
-def tick args
-  segments = 160
-
-  # On the first tick, initialize some stuff.
-  if !args.state.yoffsets
-    args.state.baseyoff = 0
-    args.state.yoffsets = []
-    for i in 0..segments do
-      args.state.yoffsets << rand * 100
-    end
-  end
-
-  # Just draw some random stuff for a few seconds.
-  args.state.static_debounce ||= 60 * 2.5
-  if args.state.static_debounce > 0
-    last_frame = args.state.static_debounce == 1
-    target = last_frame ? args.render_target(:last_frame) : args.outputs
-    draw_scene args, target
-    args.state.static_debounce -= 1
-    return unless last_frame
-  end
-
-  # build up the wipe...
-
-  # this is the thing we're wiping to.
-  args.outputs.sprites << [ 0, 0, 1280, 720, 'dragonruby.png' ]
-
-  return if (args.state.baseyoff > (1280 + 100))  # stop when done sliding
-
-  segmentw = 1280 / segments
-
-  x = 0
-  for i in 0..segments do
-    yoffset = 0
-    if args.state.yoffsets[i] < args.state.baseyoff
-      yoffset = args.state.baseyoff - args.state.yoffsets[i]
-    end
-
-    # (720 - yoffset) flips the coordinate system, (- 720) adjusts for the height of the segment.
-    args.outputs.sprites << [ x, (720 - yoffset) - 720, segmentw, 720, 'last_frame', 0, 255, 255, 255, 255, x, 0, segmentw, 720 ]
-    x += segmentw
-  end
-
-  args.state.baseyoff += 4
-
-  tick_instructions args, "Sample app shows an advanced usage of render_target."
-end
-
-def tick_instructions args, text, y = 715
-  return if args.state.key_event_occurred
-  if args.inputs.mouse.click ||
-     args.inputs.keyboard.directional_vector ||
-     args.inputs.keyboard.key_down.enter ||
-     args.inputs.keyboard.key_down.escape
-    args.state.key_event_occurred = true
-  end
-
-  args.outputs.debug << [0, y - 50, 1280, 60].solid
-  args.outputs.debug << [640, y, text, 1, 1, 255, 255, 255].label
-  args.outputs.debug << [640, y - 25, "(click to dismiss instructions)" , -2, 1, 255, 255, 255].label
-end
diff --git a/samples/07_advanced_rendering/02_render_targets_with_alphas/license-for-sample.txt b/samples/07_advanced_rendering/02_render_targets_with_alphas/license-for-sample.txt
deleted file mode 100644
index 100dcec..0000000
--- a/samples/07_advanced_rendering/02_render_targets_with_alphas/license-for-sample.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-Copyright 2019 DragonRuby LLC
-
-MIT License
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/samples/07_advanced_rendering/03_render_target_viewports/app/main.rb b/samples/07_advanced_rendering/03_render_target_viewports/app/main.rb
index b748ffa..dbceab3 100644
--- a/samples/07_advanced_rendering/03_render_target_viewports/app/main.rb
+++ b/samples/07_advanced_rendering/03_render_target_viewports/app/main.rb
@@ -48,10 +48,12 @@
  - ARRAY#intersect_rect?: Returns true or false depending on if the two rectangles intersect.
 
  - args.inputs.mouse.click: This property will be set if the mouse was clicked.
+   For more information about the mouse, go to mygame/documentation/07-mouse.md.
 
  - args.inputs.keyboard.key_up.KEY: The value of the properties will be set
    to the frame  that the key_up event occurred (the frame correlates
    to args.state.tick_count).
+   For more information about the keyboard, go to mygame/documentation/06-keyboard.md.
 
  - args.state.labels:
    The parameters for a label are
@@ -61,6 +63,7 @@
    4. the alignment
    5. the color (red, green, and blue saturations)
    6. the alpha (or transparency)
+   For more information about labels, go to mygame/documentation/02-labels.md.
 
  - args.state.lines:
    The parameters for a line are
@@ -68,6 +71,7 @@
    2. the ending position (x2, y2)
    3. the color (red, green, and blue saturations)
    4. the alpha (or transparency)
+   For more information about lines, go to mygame/documentation/04-lines.md.
 
  - args.state.solids (and args.state.borders):
    The parameters for a solid (or border) are
@@ -76,6 +80,7 @@
    3. the height (h)
    4. the color (r, g, b)
    5. the alpha (or transparency)
+   For more information about solids and borders, go to mygame/documentation/03-solids-and-borders.md.
 
  - args.state.sprites:
    The parameters for a sprite are
@@ -85,7 +90,7 @@
    4. the image path
    5. the angle
    6. the alpha (or transparency)
-
+   For more information about sprites, go to mygame/documentation/05-sprites.md.
 =end
 
 # This sample app shows different objects that can be used when making games, such as labels,
diff --git a/samples/07_advanced_rendering/04_render_primitive_hierarchies/app/main.rb b/samples/07_advanced_rendering/04_render_primitive_hierarchies/app/main.rb
index 7f345ac..aedd830 100644
--- a/samples/07_advanced_rendering/04_render_primitive_hierarchies/app/main.rb
+++ b/samples/07_advanced_rendering/04_render_primitive_hierarchies/app/main.rb
@@ -39,6 +39,7 @@
    Here is an example of a (red) border or solid definition:
    [100, 100, 400, 500, 255, 0, 0]
    It will be a solid or border depending on if it is added to args.outputs.solids or args.outputs.borders.
+   For more information about solids and borders, go to mygame/documentation/03-solids-and-borders.md.
 
  - args.outputs.sprites: An array. The values generate a sprite.
    The parameters for sprites are
@@ -49,6 +50,7 @@
 
    Here is an example of a sprite definition:
    [100, 100, 400, 500, 'sprites/dragonruby.png']
+   For more information about sprites, go to mygame/documentation/05-sprites.md.
 
 =end
 
diff --git a/samples/07_advanced_rendering/05_render_primitives_as_hash/app/main.rb b/samples/07_advanced_rendering/05_render_primitives_as_hash/app/main.rb
index 53e0f3d..907b0fb 100644
--- a/samples/07_advanced_rendering/05_render_primitives_as_hash/app/main.rb
+++ b/samples/07_advanced_rendering/05_render_primitives_as_hash/app/main.rb
@@ -16,18 +16,23 @@
 
  - args.outputs.sprites: An array. The values generate a sprite.
    The parameters are [X, Y, WIDTH, HEIGHT, PATH, ANGLE, ALPHA, RED, GREEN, BLUE]
+   For more information about sprites, go to mygame/documentation/05-sprites.md.
 
  - args.outputs.labels: An array. The values generate a label.
    The parameters are [X, Y, TEXT, SIZE, ALIGNMENT, RED, GREEN, BLUE, ALPHA, FONT STYLE]
+   For more information about labels, go to mygame/documentation/02-labels.md.
 
  - args.outputs.solids: An array. The values generate a solid.
    The parameters are [X, Y, WIDTH, HEIGHT, RED, GREEN, BLUE, ALPHA]
+   For more information about solids, go to mygame/documentation/03-solids-and-borders.md.
 
  - args.outputs.borders: An array. The values generate a border.
    The parameters are the same as a solid.
+   For more information about borders, go to mygame/documentation/03-solids-and-borders.md.
 
  - args.outputs.lines: An array. The values generate a line.
    The parameters are [X1, Y1, X2, Y2, RED, GREEN, BLUE]
+   For more information about labels, go to mygame/documentation/02-labels.md.
 
 =end
 
@@ -131,7 +136,7 @@ def tick args
     flip_horizontally: false,
     angle_anchor_x: 0.5,            # rotation center set to middle
     angle_anchor_y: 0.5
-  }.sprite
+  }.sprite!
 
   # Outputs label as primitive using a hash
   args.outputs.primitives << {
@@ -145,7 +150,7 @@ def tick args
     b:         50,
     a:         255,                 # transparency
     font:      "fonts/manaspc.ttf"  # font style
-  }.label
+  }.label!
 
   # Outputs solid as primitive using a hash
   args.outputs.primitives << {
@@ -157,7 +162,7 @@ def tick args
     g:  50,
     b:  50,
     a: 255                          # transparency
-  }.solid
+  }.solid!
 
   # Outputs border as primitive using a hash
   # Same parameters as solid
@@ -170,7 +175,7 @@ def tick args
     g:  50,
     b:  50,
     a: 255                          # transparency
-  }.border
+  }.border!
 
   # Outputs line as primitive using a hash
   args.outputs.primitives << {
@@ -182,5 +187,5 @@ def tick args
     g:   50,
     b:   50,
     a:  255                         # transparency
-  }.line
+  }.line!
 end
diff --git a/samples/07_advanced_rendering/07_simple_camera/app/main.rb b/samples/07_advanced_rendering/07_simple_camera/app/main.rb
new file mode 100644
index 0000000..e8d96ea
--- /dev/null
+++ b/samples/07_advanced_rendering/07_simple_camera/app/main.rb
@@ -0,0 +1,93 @@
+def tick args
+  # variables you can play around with
+  args.state.world.w      ||= 1280
+  args.state.world.h      ||= 720
+
+  args.state.player.x     ||= 0
+  args.state.player.y     ||= 0
+  args.state.player.size  ||= 32
+
+  args.state.enemy.x      ||= 700
+  args.state.enemy.y      ||= 700
+  args.state.enemy.size   ||= 16
+
+  args.state.camera.x                ||= 640
+  args.state.camera.y                ||= 300
+  args.state.camera.scale            ||= 1.0
+  args.state.camera.show_empty_space ||= :yes
+
+  # instructions
+  args.outputs.primitives << { x: 0, y:  80.from_top, w: 360, h: 80, r: 0, g: 0, b: 0, a: 128 }.solid!
+  args.outputs.primitives << { x: 10, y: 10.from_top, text: "arrow keys to move around", r: 255, g: 255, b: 255}.label!
+  args.outputs.primitives << { x: 10, y: 30.from_top, text: "+/- to change zoom of camera", r: 255, g: 255, b: 255}.label!
+  args.outputs.primitives << { x: 10, y: 50.from_top, text: "tab to change camera edge behavior", r: 255, g: 255, b: 255}.label!
+
+  # render scene
+  args.outputs[:scene].w = args.state.world.w
+  args.outputs[:scene].h = args.state.world.h
+
+  args.outputs[:scene].solids << { x: 0, y: 0, w: args.state.world.w, h: args.state.world.h, r: 20, g: 60, b: 80 }
+  args.outputs[:scene].solids << { x: args.state.player.x, y: args.state.player.y,
+                                   w: args.state.player.size, h: args.state.player.size, r: 80, g: 155, b: 80 }
+  args.outputs[:scene].solids << { x: args.state.enemy.x, y: args.state.enemy.y,
+                                   w: args.state.enemy.size, h: args.state.enemy.size, r: 155, g: 80, b: 80 }
+
+  # render camera
+  scene_position = calc_scene_position args
+  args.outputs.sprites << { x: scene_position.x,
+                            y: scene_position.y,
+                            w: scene_position.w,
+                            h: scene_position.h,
+                            path: :scene }
+
+  # move player
+  if args.inputs.directional_angle
+    args.state.player.x += args.inputs.directional_angle.vector_x * 5
+    args.state.player.y += args.inputs.directional_angle.vector_y * 5
+    args.state.player.x  = args.state.player.x.clamp(0, args.state.world.w - args.state.player.size)
+    args.state.player.y  = args.state.player.y.clamp(0, args.state.world.h - args.state.player.size)
+  end
+
+  # +/- to zoom in and out
+  if args.inputs.keyboard.plus && args.state.tick_count.zmod?(3)
+    args.state.camera.scale += 0.05
+  elsif args.inputs.keyboard.hyphen && args.state.tick_count.zmod?(3)
+    args.state.camera.scale -= 0.05
+  elsif args.inputs.keyboard.key_down.tab
+    if args.state.camera.show_empty_space == :yes
+      args.state.camera.show_empty_space = :no
+    else
+      args.state.camera.show_empty_space = :yes
+    end
+  end
+
+  args.state.camera.scale = args.state.camera.scale.greater(0.1)
+end
+
+def calc_scene_position args
+  result = { x: args.state.camera.x - (args.state.player.x * args.state.camera.scale),
+             y: args.state.camera.y - (args.state.player.y * args.state.camera.scale),
+             w: args.state.world.w * args.state.camera.scale,
+             h: args.state.world.h * args.state.camera.scale,
+             scale: args.state.camera.scale }
+
+  return result if args.state.camera.show_empty_space == :yes
+
+  if result.w < args.grid.w
+    result.merge!(x: (args.grid.w - result.w).half)
+  elsif (args.state.player.x * result.scale) < args.grid.w.half
+    result.merge!(x: 10)
+  elsif (result.x + result.w) < args.grid.w
+    result.merge!(x: - result.w + (args.grid.w - 10))
+  end
+
+  if result.h < args.grid.h
+    result.merge!(y: (args.grid.h - result.h).half)
+  elsif (result.y) > 10
+    result.merge!(y: 10)
+  elsif (result.y + result.h) < args.grid.h
+    result.merge!(y: - result.h + (args.grid.h - 10))
+  end
+
+  result
+end
diff --git a/samples/07_advanced_rendering/07_simple_camera/replay.txt b/samples/07_advanced_rendering/07_simple_camera/replay.txt
new file mode 100644
index 0000000..532f46c
--- /dev/null
+++ b/samples/07_advanced_rendering/07_simple_camera/replay.txt
@@ -0,0 +1,232 @@
+replay_version 2.0
+stopped_at 1551
+seed 100
+recorded_at Sat Jul 17 09:21:44 2021
+[:mouse_button_up, 1, 0, 1, 1, 6]
+[:mouse_button_pressed, 1, 0, 1, 2, 140]
+[:mouse_button_up, 1, 0, 1, 3, 146]
+[:key_down_raw, 1073741903, 0, 2, 4, 245]
+[:key_down_raw, 1073741903, 0, 2, 5, 259]
+[:key_down_raw, 1073741903, 0, 2, 6, 261]
+[:key_down_raw, 1073741903, 0, 2, 7, 263]
+[:key_down_raw, 1073741903, 0, 2, 8, 265]
+[:key_down_raw, 1073741903, 0, 2, 9, 267]
+[:key_down_raw, 1073741903, 0, 2, 10, 269]
+[:key_down_raw, 1073741906, 0, 2, 11, 269]
+[:key_up_raw, 1073741903, 0, 2, 12, 280]
+[:key_down_raw, 1073741903, 0, 2, 13, 284]
+[:key_down_raw, 1073741903, 0, 2, 14, 299]
+[:key_down_raw, 1073741903, 0, 2, 15, 301]
+[:key_down_raw, 1073741903, 0, 2, 16, 303]
+[:key_down_raw, 1073741903, 0, 2, 17, 305]
+[:key_down_raw, 1073741903, 0, 2, 18, 307]
+[:key_down_raw, 1073741903, 0, 2, 19, 309]
+[:key_down_raw, 1073741903, 0, 2, 20, 311]
+[:key_down_raw, 1073741903, 0, 2, 21, 313]
+[:key_down_raw, 1073741903, 0, 2, 22, 315]
+[:key_down_raw, 1073741903, 0, 2, 23, 317]
+[:key_down_raw, 1073741903, 0, 2, 24, 319]
+[:key_down_raw, 1073741903, 0, 2, 25, 321]
+[:key_down_raw, 1073741903, 0, 2, 26, 323]
+[:key_down_raw, 1073741903, 0, 2, 27, 325]
+[:key_down_raw, 1073741903, 0, 2, 28, 327]
+[:key_down_raw, 1073741903, 0, 2, 29, 329]
+[:key_down_raw, 1073741903, 0, 2, 30, 331]
+[:key_down_raw, 1073741903, 0, 2, 31, 333]
+[:key_down_raw, 1073741903, 0, 2, 32, 335]
+[:key_down_raw, 1073741903, 0, 2, 33, 337]
+[:key_down_raw, 1073741903, 0, 2, 34, 339]
+[:key_up_raw, 1073741906, 0, 2, 35, 341]
+[:key_down_raw, 1073741903, 0, 2, 36, 341]
+[:key_down_raw, 1073741903, 0, 2, 37, 343]
+[:key_down_raw, 1073741903, 0, 2, 38, 345]
+[:key_down_raw, 1073741903, 0, 2, 39, 347]
+[:key_down_raw, 1073741903, 0, 2, 40, 349]
+[:key_down_raw, 1073741903, 0, 2, 41, 351]
+[:key_down_raw, 1073741903, 0, 2, 42, 353]
+[:key_down_raw, 1073741903, 0, 2, 43, 355]
+[:key_down_raw, 1073741906, 0, 2, 44, 357]
+[:key_down_raw, 1073741906, 0, 2, 45, 372]
+[:key_down_raw, 1073741906, 0, 2, 46, 374]
+[:key_down_raw, 1073741906, 0, 2, 47, 376]
+[:key_down_raw, 1073741906, 0, 2, 48, 378]
+[:key_down_raw, 1073741906, 0, 2, 49, 380]
+[:key_down_raw, 1073741906, 0, 2, 50, 382]
+[:key_down_raw, 1073741906, 0, 2, 51, 384]
+[:key_down_raw, 1073741906, 0, 2, 52, 386]
+[:key_down_raw, 1073741906, 0, 2, 53, 388]
+[:key_down_raw, 1073741906, 0, 2, 54, 390]
+[:key_down_raw, 1073741906, 0, 2, 55, 392]
+[:key_down_raw, 1073741906, 0, 2, 56, 395]
+[:key_up_raw, 1073741906, 0, 2, 57, 396]
+[:key_up_raw, 1073741903, 0, 2, 58, 397]
+[:key_down_raw, 8, 0, 2, 59, 466]
+[:key_up_raw, 8, 0, 2, 60, 466]
+[:key_down_raw, 8, 0, 2, 61, 470]
+[:key_up_raw, 8, 0, 2, 62, 475]
+[:key_down_raw, 45, 0, 2, 63, 540]
+[:key_up_raw, 45, 0, 2, 64, 545]
+[:key_down_raw, 45, 0, 2, 65, 551]
+[:key_up_raw, 45, 0, 2, 66, 556]
+[:key_down_raw, 45, 0, 2, 67, 566]
+[:key_up_raw, 45, 0, 2, 68, 571]
+[:key_down_raw, 45, 0, 2, 69, 577]
+[:key_up_raw, 45, 0, 2, 70, 581]
+[:key_down_raw, 45, 0, 2, 71, 595]
+[:key_up_raw, 45, 0, 2, 72, 600]
+[:key_down_raw, 1073741905, 0, 2, 73, 715]
+[:key_down_raw, 1073741905, 0, 2, 74, 730]
+[:key_down_raw, 1073741905, 0, 2, 75, 732]
+[:key_down_raw, 1073741905, 0, 2, 76, 734]
+[:key_down_raw, 1073741905, 0, 2, 77, 736]
+[:key_down_raw, 1073741905, 0, 2, 78, 738]
+[:key_down_raw, 1073741904, 0, 2, 79, 739]
+[:key_up_raw, 1073741905, 0, 2, 80, 743]
+[:key_down_raw, 1073741904, 0, 2, 81, 754]
+[:key_down_raw, 1073741904, 0, 2, 82, 756]
+[:key_down_raw, 1073741904, 0, 2, 83, 758]
+[:key_down_raw, 1073741904, 0, 2, 84, 760]
+[:key_down_raw, 1073741904, 0, 2, 85, 762]
+[:key_down_raw, 1073741904, 0, 2, 86, 764]
+[:key_down_raw, 1073741904, 0, 2, 87, 766]
+[:key_down_raw, 1073741904, 0, 2, 88, 768]
+[:key_down_raw, 1073741904, 0, 2, 89, 770]
+[:key_down_raw, 1073741904, 0, 2, 90, 772]
+[:key_down_raw, 1073741905, 0, 2, 91, 774]
+[:key_down_raw, 1073741906, 0, 2, 92, 781]
+[:key_up_raw, 1073741904, 0, 2, 93, 785]
+[:key_up_raw, 1073741905, 0, 2, 94, 791]
+[:key_down_raw, 1073741906, 0, 2, 95, 796]
+[:key_down_raw, 1073741903, 0, 2, 96, 797]
+[:key_up_raw, 1073741906, 0, 2, 97, 804]
+[:key_up_raw, 1073741903, 0, 2, 98, 810]
+[:key_down_raw, 1073742049, 1, 2, 99, 884]
+[:key_down_raw, 61, 1, 2, 100, 885]
+[:key_up_raw, 61, 1, 2, 101, 888]
+[:key_up_raw, 1073742049, 0, 2, 102, 888]
+[:key_down_raw, 1073742049, 1, 2, 103, 898]
+[:key_down_raw, 61, 1, 2, 104, 899]
+[:key_up_raw, 61, 1, 2, 105, 903]
+[:key_up_raw, 1073742049, 0, 2, 106, 903]
+[:key_down_raw, 1073742049, 1, 2, 107, 909]
+[:key_down_raw, 61, 1, 2, 108, 909]
+[:key_up_raw, 61, 1, 2, 109, 912]
+[:key_up_raw, 1073742049, 0, 2, 110, 913]
+[:key_down_raw, 1073742049, 1, 2, 111, 918]
+[:key_down_raw, 61, 1, 2, 112, 918]
+[:key_up_raw, 61, 1, 2, 113, 921]
+[:key_up_raw, 1073742049, 0, 2, 114, 922]
+[:key_down_raw, 1073742049, 1, 2, 115, 926]
+[:key_down_raw, 61, 1, 2, 116, 926]
+[:key_up_raw, 61, 1, 2, 117, 930]
+[:key_up_raw, 1073742049, 0, 2, 118, 931]
+[:key_down_raw, 1073742049, 1, 2, 119, 935]
+[:key_down_raw, 61, 1, 2, 120, 935]
+[:key_up_raw, 61, 1, 2, 121, 940]
+[:key_up_raw, 1073742049, 0, 2, 122, 941]
+[:key_down_raw, 1073742049, 1, 2, 123, 947]
+[:key_down_raw, 61, 1, 2, 124, 947]
+[:key_up_raw, 61, 1, 2, 125, 950]
+[:key_up_raw, 1073742049, 0, 2, 126, 951]
+[:key_down_raw, 1073742049, 1, 2, 127, 955]
+[:key_down_raw, 61, 1, 2, 128, 956]
+[:key_up_raw, 61, 1, 2, 129, 960]
+[:key_up_raw, 1073742049, 0, 2, 130, 960]
+[:key_down_raw, 9, 0, 2, 131, 986]
+[:key_up_raw, 9, 0, 2, 132, 991]
+[:key_down_raw, 1073741904, 0, 2, 133, 1015]
+[:key_down_raw, 1073741904, 0, 2, 134, 1030]
+[:key_down_raw, 1073741904, 0, 2, 135, 1032]
+[:key_down_raw, 1073741904, 0, 2, 136, 1034]
+[:key_down_raw, 1073741904, 0, 2, 137, 1036]
+[:key_down_raw, 1073741904, 0, 2, 138, 1038]
+[:key_down_raw, 1073741904, 0, 2, 139, 1040]
+[:key_down_raw, 1073741904, 0, 2, 140, 1042]
+[:key_up_raw, 1073741904, 0, 2, 141, 1044]
+[:key_down_raw, 1073741903, 0, 2, 142, 1048]
+[:key_down_raw, 1073741903, 0, 2, 143, 1063]
+[:key_down_raw, 1073741903, 0, 2, 144, 1065]
+[:key_down_raw, 1073741903, 0, 2, 145, 1067]
+[:key_down_raw, 1073741903, 0, 2, 146, 1069]
+[:key_down_raw, 1073741903, 0, 2, 147, 1071]
+[:key_down_raw, 1073741903, 0, 2, 148, 1073]
+[:key_down_raw, 1073741903, 0, 2, 149, 1075]
+[:key_down_raw, 1073741903, 0, 2, 150, 1077]
+[:key_down_raw, 1073741903, 0, 2, 151, 1079]
+[:key_down_raw, 1073741903, 0, 2, 152, 1081]
+[:key_down_raw, 1073741903, 0, 2, 153, 1083]
+[:key_down_raw, 1073741903, 0, 2, 154, 1085]
+[:key_down_raw, 1073741903, 0, 2, 155, 1087]
+[:key_down_raw, 1073741903, 0, 2, 156, 1089]
+[:key_down_raw, 1073741903, 0, 2, 157, 1091]
+[:key_down_raw, 1073741903, 0, 2, 158, 1093]
+[:key_down_raw, 1073741903, 0, 2, 159, 1095]
+[:key_down_raw, 1073741903, 0, 2, 160, 1097]
+[:key_down_raw, 1073741903, 0, 2, 161, 1099]
+[:key_down_raw, 1073741903, 0, 2, 162, 1101]
+[:key_down_raw, 1073741903, 0, 2, 163, 1103]
+[:key_down_raw, 1073741903, 0, 2, 164, 1105]
+[:key_down_raw, 1073741903, 0, 2, 165, 1107]
+[:key_down_raw, 1073741903, 0, 2, 166, 1109]
+[:key_down_raw, 1073741903, 0, 2, 167, 1111]
+[:key_down_raw, 1073741903, 0, 2, 168, 1113]
+[:key_down_raw, 1073741903, 0, 2, 169, 1115]
+[:key_down_raw, 1073741903, 0, 2, 170, 1117]
+[:key_down_raw, 1073741903, 0, 2, 171, 1119]
+[:key_down_raw, 1073741903, 0, 2, 172, 1121]
+[:key_down_raw, 1073741903, 0, 2, 173, 1123]
+[:key_down_raw, 1073741903, 0, 2, 174, 1125]
+[:key_down_raw, 1073741903, 0, 2, 175, 1127]
+[:key_down_raw, 1073741903, 0, 2, 176, 1129]
+[:key_down_raw, 1073741903, 0, 2, 177, 1131]
+[:key_down_raw, 1073741903, 0, 2, 178, 1133]
+[:key_down_raw, 1073741903, 0, 2, 179, 1135]
+[:key_down_raw, 1073741903, 0, 2, 180, 1137]
+[:key_down_raw, 1073741903, 0, 2, 181, 1139]
+[:key_down_raw, 1073741903, 0, 2, 182, 1141]
+[:key_down_raw, 1073741903, 0, 2, 183, 1143]
+[:key_down_raw, 1073741903, 0, 2, 184, 1145]
+[:key_down_raw, 1073741903, 0, 2, 185, 1147]
+[:key_down_raw, 1073741903, 0, 2, 186, 1149]
+[:key_down_raw, 1073741903, 0, 2, 187, 1151]
+[:key_down_raw, 1073741903, 0, 2, 188, 1153]
+[:key_down_raw, 1073741903, 0, 2, 189, 1155]
+[:key_down_raw, 1073741903, 0, 2, 190, 1157]
+[:key_down_raw, 1073741903, 0, 2, 191, 1159]
+[:key_down_raw, 1073741903, 0, 2, 192, 1161]
+[:key_down_raw, 1073741903, 0, 2, 193, 1163]
+[:key_down_raw, 1073741905, 0, 2, 194, 1164]
+[:key_down_raw, 1073741905, 0, 2, 195, 1180]
+[:key_down_raw, 1073741905, 0, 2, 196, 1182]
+[:key_down_raw, 1073741905, 0, 2, 197, 1184]
+[:key_down_raw, 1073741905, 0, 2, 198, 1186]
+[:key_down_raw, 1073741905, 0, 2, 199, 1188]
+[:key_down_raw, 1073741905, 0, 2, 200, 1190]
+[:key_down_raw, 1073741905, 0, 2, 201, 1192]
+[:key_down_raw, 1073741905, 0, 2, 202, 1194]
+[:key_down_raw, 1073741905, 0, 2, 203, 1196]
+[:key_down_raw, 1073741905, 0, 2, 204, 1198]
+[:key_down_raw, 1073741905, 0, 2, 205, 1200]
+[:key_down_raw, 1073741905, 0, 2, 206, 1202]
+[:key_down_raw, 1073741905, 0, 2, 207, 1204]
+[:key_down_raw, 1073741905, 0, 2, 208, 1206]
+[:key_down_raw, 1073741905, 0, 2, 209, 1208]
+[:key_down_raw, 1073741905, 0, 2, 210, 1210]
+[:key_down_raw, 1073741905, 0, 2, 211, 1212]
+[:key_down_raw, 1073741905, 0, 2, 212, 1214]
+[:key_down_raw, 1073741905, 0, 2, 213, 1216]
+[:key_up_raw, 1073741903, 0, 2, 214, 1216]
+[:key_up_raw, 1073741905, 0, 2, 215, 1217]
+[:key_down_raw, 45, 0, 2, 216, 1263]
+[:key_up_raw, 45, 0, 2, 217, 1265]
+[:key_down_raw, 45, 0, 2, 218, 1271]
+[:key_up_raw, 45, 0, 2, 219, 1275]
+[:key_down_raw, 45, 0, 2, 220, 1282]
+[:key_up_raw, 45, 0, 2, 221, 1287]
+[:key_down_raw, 45, 0, 2, 222, 1296]
+[:key_up_raw, 45, 0, 2, 223, 1301]
+[:key_down_raw, 45, 0, 2, 224, 1308]
+[:key_up_raw, 45, 0, 2, 225, 1312]
+[:key_down_raw, 96, 0, 2, 226, 1386]
+[:key_up_raw, 96, 0, 2, 227, 1391]
+[:key_down_raw, 13, 0, 2, 228, 1551]
diff --git a/samples/07_advanced_rendering/07_splitscreen_camera/run.bat b/samples/07_advanced_rendering/07_splitscreen_camera/run.bat
deleted file mode 100644
index 08e7ed8..0000000
--- a/samples/07_advanced_rendering/07_splitscreen_camera/run.bat
+++ /dev/null
@@ -1,6 +0,0 @@
-cd /d %~dp0
-
-cd ..
-cd ..
-cd ..
-dragonruby samples/99_camera/splitscreen
diff --git a/samples/07_advanced_rendering/07_splitscreen_camera/app/main.rb b/samples/07_advanced_rendering/08_splitscreen_camera/app/main.rb
index 9b08e1e..9d22918 100644
--- a/samples/07_advanced_rendering/07_splitscreen_camera/app/main.rb
+++ b/samples/07_advanced_rendering/08_splitscreen_camera/app/main.rb
@@ -6,7 +6,7 @@ class CameraMovement
   def serialize
     {state: state, inputs: inputs, outputs: outputs, grid: grid }
   end
-  
+
   def inspect
     serialize.to_s
   end
@@ -76,12 +76,12 @@ class CameraMovement
     default_player(0, 0, 64, 64,
                    "sprites/player/player_#{state.player_cyan.orientation}_standing.png")
   end
-  
+
   def new_player_magenta
     default_player(64, 0, 64, 64,
                    "sprites/player/player_#{state.player_magenta.orientation}_standing.png")
   end
-  
+
   def new_camera_magenta
     default_camera(0,0,720,720)
   end
@@ -93,7 +93,8 @@ class CameraMovement
   def new_camera_center
     default_camera(0,0,1280,720)
   end
-  
+
+
   def new_room
     default_floor_tile(0,0,1024,1024,'sprites/rooms/camera_room.png')
   end
@@ -118,7 +119,7 @@ class CameraMovement
     state.player_cyan.x += state.player_cyan.dx
     state.player_cyan.y += state.player_cyan.dy
   end
-  
+
   def calc_player_magenta
     state.player_magenta.x += state.player_magenta.dx
     state.player_magenta.y += state.player_magenta.dy
@@ -133,7 +134,7 @@ class CameraMovement
     state.camera_center.x += (targetX - state.camera_center.x) * 0.1 * timeScale
     state.camera_center.y += (targetY - state.camera_center.y) * 0.1 * timeScale
   end
-  
+
 
   def calc_camera_magenta
     timeScale = 1
@@ -170,7 +171,7 @@ class CameraMovement
   def calc_trauma_decay
     state.trauma = state.trauma * 0.9
   end
-  
+
   def calc_random_float_range(min, max)
     rand * (max-min) + min
   end
@@ -198,7 +199,7 @@ class CameraMovement
                                 g: 255,
                                 b: 255}
   end
-  
+
   def render_player_magenta
     outputs[:scene].sprites << {x: state.player_magenta.x,
                                 y: state.player_magenta.y,
@@ -244,16 +245,16 @@ class CameraMovement
      render_camera_magenta_scene
      render_camera_cyan_scene
 
-     angle = Math.atan((state.player_magenta.y - state.player_cyan.y)/(state.player_magenta.x- state.player_cyan.x)) * 180/Math::PI 
+     angle = Math.atan((state.player_magenta.y - state.player_cyan.y)/(state.player_magenta.x- state.player_cyan.x)) * 180/Math::PI
      output_split_camera angle
-     
+
   end
 
   def render_camera_magenta_scene
      zoomFactor = 1
      offsetX = 32
      offsetY = 32
-     
+
      outputs[:scene_magenta].sprites << {x: (-state.camera_magenta.x*2),
                                          y: (-state.camera_magenta.y),
                                          w: outputs[:scene].width*2,
@@ -279,7 +280,7 @@ class CameraMovement
     outputs.labels << [128,64,"#{quadrant}",8,2,255,0,255,255]
     if quadrant == 1
       set_camera_attributes(w: 640, h: 720, m_x: 640, m_y: 0, c_x: 0, c_y: 0)
-      
+
     elsif quadrant == 2
       set_camera_attributes(w: 1280, h: 360, m_x: 0, m_y: 360, c_x: 0, c_y: 0)
 
@@ -297,7 +298,7 @@ class CameraMovement
     state.camera_cyan.h = h + 64
     outputs[:scene_cyan].width = (w) * 2
     outputs[:scene_cyan].height = h
-    
+
     state.camera_magenta.w = w + 64
     state.camera_magenta.h = h + 64
     outputs[:scene_magenta].width = (w) * 2
@@ -309,7 +310,7 @@ class CameraMovement
                         path: :scene_magenta}
     outputs.sprites << {x: c_x,
                         y: c_y,
-                        w: w, 
+                        w: w,
                         h: h,
                         path: :scene_cyan}
   end
@@ -317,7 +318,7 @@ class CameraMovement
   def add_trauma amount
     state.trauma = [state.trauma + amount, 1.0].min
   end
-  
+
   def remove_trauma amount
     state.trauma = [state.trauma - amount, 0.0].max
   end
@@ -357,7 +358,7 @@ class CameraMovement
     outputs.labels << [128,512,"#{state.player_cyan.x.round()}",8,2,0,255,255,255]
     outputs.labels << [128,480,"#{state.player_cyan.y.round()}",8,2,0,255,255,255]
   end
-  
+
   def input_move_magenta
     if inputs.keyboard.key_held.w
       state.player_magenta.dy = 5
@@ -391,5 +392,5 @@ def tick args
   $camera_movement.outputs = args.outputs
   $camera_movement.state   = args.state
   $camera_movement.grid    = args.grid
-  $camera_movement.tick  
+  $camera_movement.tick
 end
diff --git a/samples/07_advanced_rendering/08_splitscreen_camera/replay.txt b/samples/07_advanced_rendering/08_splitscreen_camera/replay.txt
new file mode 100644
index 0000000..b0c548e
--- /dev/null
+++ b/samples/07_advanced_rendering/08_splitscreen_camera/replay.txt
@@ -0,0 +1,226 @@
+replay_version 2.0
+stopped_at 1047
+seed 100
+recorded_at Sat Jul 17 09:23:22 2021
+[:mouse_button_up, 1, 0, 1, 1, 5]
+[:mouse_move, 795, 98, 2, 2, 75]
+[:mouse_move, 797, 100, 2, 3, 77]
+[:mouse_move, 799, 101, 2, 4, 78]
+[:mouse_move, 800, 101, 2, 5, 78]
+[:mouse_button_pressed, 1, 0, 1, 6, 88]
+[:mouse_button_up, 1, 0, 1, 7, 92]
+[:key_down_raw, 1073741903, 0, 2, 8, 124]
+[:key_down_raw, 1073741903, 0, 2, 9, 138]
+[:key_down_raw, 1073741903, 0, 2, 10, 141]
+[:key_down_raw, 1073741903, 0, 2, 11, 142]
+[:key_down_raw, 1073741903, 0, 2, 12, 144]
+[:key_down_raw, 1073741903, 0, 2, 13, 147]
+[:key_down_raw, 1073741903, 0, 2, 14, 148]
+[:key_down_raw, 1073741903, 0, 2, 15, 151]
+[:key_down_raw, 1073741906, 0, 2, 16, 151]
+[:key_down_raw, 1073741906, 0, 2, 17, 166]
+[:key_down_raw, 1073741906, 0, 2, 18, 169]
+[:key_down_raw, 1073741906, 0, 2, 19, 170]
+[:key_down_raw, 1073741906, 0, 2, 20, 172]
+[:key_down_raw, 1073741906, 0, 2, 21, 174]
+[:key_down_raw, 1073741906, 0, 2, 22, 177]
+[:key_down_raw, 1073741906, 0, 2, 23, 178]
+[:key_down_raw, 1073741906, 0, 2, 24, 180]
+[:key_down_raw, 1073741906, 0, 2, 25, 182]
+[:key_down_raw, 1073741906, 0, 2, 26, 184]
+[:key_down_raw, 1073741906, 0, 2, 27, 186]
+[:key_down_raw, 1073741906, 0, 2, 28, 188]
+[:key_down_raw, 1073741906, 0, 2, 29, 190]
+[:key_down_raw, 1073741906, 0, 2, 30, 193]
+[:key_down_raw, 1073741906, 0, 2, 31, 194]
+[:key_up_raw, 1073741906, 0, 2, 32, 195]
+[:key_up_raw, 1073741903, 0, 2, 33, 291]
+[:key_down_raw, 119, 0, 2, 34, 360]
+[:key_down_raw, 119, 0, 2, 35, 375]
+[:key_down_raw, 119, 0, 2, 36, 378]
+[:key_down_raw, 119, 0, 2, 37, 379]
+[:key_down_raw, 119, 0, 2, 38, 381]
+[:key_down_raw, 119, 0, 2, 39, 383]
+[:key_down_raw, 119, 0, 2, 40, 385]
+[:key_down_raw, 119, 0, 2, 41, 387]
+[:key_down_raw, 119, 0, 2, 42, 389]
+[:key_down_raw, 119, 0, 2, 43, 391]
+[:key_down_raw, 119, 0, 2, 44, 393]
+[:key_down_raw, 119, 0, 2, 45, 395]
+[:key_down_raw, 119, 0, 2, 46, 397]
+[:key_down_raw, 119, 0, 2, 47, 401]
+[:key_down_raw, 119, 0, 2, 48, 403]
+[:key_down_raw, 119, 0, 2, 49, 405]
+[:key_down_raw, 119, 0, 2, 50, 407]
+[:key_down_raw, 119, 0, 2, 51, 409]
+[:key_down_raw, 119, 0, 2, 52, 411]
+[:key_down_raw, 119, 0, 2, 53, 412]
+[:key_down_raw, 119, 0, 2, 54, 414]
+[:key_down_raw, 119, 0, 2, 55, 416]
+[:key_down_raw, 119, 0, 2, 56, 419]
+[:key_down_raw, 119, 0, 2, 57, 421]
+[:key_down_raw, 119, 0, 2, 58, 422]
+[:key_down_raw, 119, 0, 2, 59, 424]
+[:key_down_raw, 119, 0, 2, 60, 426]
+[:key_down_raw, 119, 0, 2, 61, 429]
+[:key_down_raw, 119, 0, 2, 62, 431]
+[:key_down_raw, 119, 0, 2, 63, 432]
+[:key_down_raw, 119, 0, 2, 64, 434]
+[:key_down_raw, 119, 0, 2, 65, 436]
+[:key_down_raw, 119, 0, 2, 66, 438]
+[:key_down_raw, 119, 0, 2, 67, 441]
+[:key_down_raw, 119, 0, 2, 68, 443]
+[:key_down_raw, 119, 0, 2, 69, 444]
+[:key_down_raw, 119, 0, 2, 70, 446]
+[:key_down_raw, 119, 0, 2, 71, 449]
+[:key_down_raw, 119, 0, 2, 72, 451]
+[:key_down_raw, 119, 0, 2, 73, 453]
+[:key_down_raw, 119, 0, 2, 74, 455]
+[:key_down_raw, 119, 0, 2, 75, 457]
+[:key_down_raw, 119, 0, 2, 76, 459]
+[:key_down_raw, 119, 0, 2, 77, 460]
+[:key_down_raw, 119, 0, 2, 78, 462]
+[:key_down_raw, 119, 0, 2, 79, 464]
+[:key_down_raw, 119, 0, 2, 80, 467]
+[:key_down_raw, 119, 0, 2, 81, 468]
+[:key_down_raw, 119, 0, 2, 82, 471]
+[:key_down_raw, 119, 0, 2, 83, 473]
+[:key_down_raw, 119, 0, 2, 84, 474]
+[:key_down_raw, 119, 0, 2, 85, 476]
+[:key_down_raw, 119, 0, 2, 86, 478]
+[:key_down_raw, 119, 0, 2, 87, 481]
+[:key_down_raw, 119, 0, 2, 88, 482]
+[:key_down_raw, 119, 0, 2, 89, 484]
+[:key_down_raw, 119, 0, 2, 90, 486]
+[:key_down_raw, 119, 0, 2, 91, 489]
+[:key_down_raw, 119, 0, 2, 92, 491]
+[:key_down_raw, 119, 0, 2, 93, 493]
+[:key_down_raw, 119, 0, 2, 94, 494]
+[:key_down_raw, 119, 0, 2, 95, 496]
+[:key_down_raw, 119, 0, 2, 96, 498]
+[:key_down_raw, 119, 0, 2, 97, 501]
+[:key_down_raw, 119, 0, 2, 98, 502]
+[:key_down_raw, 119, 0, 2, 99, 505]
+[:key_down_raw, 119, 0, 2, 100, 507]
+[:key_down_raw, 119, 0, 2, 101, 509]
+[:key_down_raw, 119, 0, 2, 102, 511]
+[:key_down_raw, 119, 0, 2, 103, 512]
+[:key_down_raw, 119, 0, 2, 104, 514]
+[:key_down_raw, 119, 0, 2, 105, 516]
+[:key_down_raw, 119, 0, 2, 106, 519]
+[:key_down_raw, 119, 0, 2, 107, 521]
+[:key_down_raw, 119, 0, 2, 108, 523]
+[:key_down_raw, 119, 0, 2, 109, 524]
+[:key_down_raw, 119, 0, 2, 110, 526]
+[:key_down_raw, 119, 0, 2, 111, 529]
+[:key_down_raw, 119, 0, 2, 112, 530]
+[:key_down_raw, 119, 0, 2, 113, 533]
+[:key_down_raw, 119, 0, 2, 114, 535]
+[:key_down_raw, 119, 0, 2, 115, 536]
+[:key_up_raw, 119, 0, 2, 116, 536]
+[:key_down_raw, 100, 0, 2, 117, 548]
+[:key_down_raw, 100, 0, 2, 118, 563]
+[:key_down_raw, 100, 0, 2, 119, 565]
+[:key_down_raw, 100, 0, 2, 120, 567]
+[:key_down_raw, 100, 0, 2, 121, 569]
+[:key_down_raw, 100, 0, 2, 122, 572]
+[:key_down_raw, 100, 0, 2, 123, 573]
+[:key_down_raw, 100, 0, 2, 124, 576]
+[:key_down_raw, 100, 0, 2, 125, 577]
+[:key_down_raw, 100, 0, 2, 126, 579]
+[:key_down_raw, 100, 0, 2, 127, 582]
+[:key_down_raw, 100, 0, 2, 128, 584]
+[:key_down_raw, 100, 0, 2, 129, 585]
+[:key_down_raw, 100, 0, 2, 130, 588]
+[:key_down_raw, 100, 0, 2, 131, 589]
+[:key_down_raw, 100, 0, 2, 132, 591]
+[:key_down_raw, 100, 0, 2, 133, 593]
+[:key_down_raw, 100, 0, 2, 134, 595]
+[:key_down_raw, 100, 0, 2, 135, 597]
+[:key_down_raw, 100, 0, 2, 136, 599]
+[:key_down_raw, 100, 0, 2, 137, 601]
+[:key_down_raw, 100, 0, 2, 138, 603]
+[:key_down_raw, 100, 0, 2, 139, 605]
+[:key_down_raw, 100, 0, 2, 140, 607]
+[:key_up_raw, 100, 0, 2, 141, 608]
+[:key_down_raw, 100, 0, 2, 142, 646]
+[:key_up_raw, 100, 0, 2, 143, 654]
+[:key_down_raw, 1073741906, 0, 2, 144, 696]
+[:key_down_raw, 1073741906, 0, 2, 145, 711]
+[:key_down_raw, 1073741906, 0, 2, 146, 713]
+[:key_down_raw, 1073741906, 0, 2, 147, 715]
+[:key_down_raw, 1073741906, 0, 2, 148, 717]
+[:key_down_raw, 1073741906, 0, 2, 149, 719]
+[:key_down_raw, 1073741906, 0, 2, 150, 721]
+[:key_down_raw, 1073741906, 0, 2, 151, 723]
+[:key_down_raw, 1073741906, 0, 2, 152, 725]
+[:key_down_raw, 1073741906, 0, 2, 153, 727]
+[:key_down_raw, 1073741906, 0, 2, 154, 729]
+[:key_down_raw, 1073741906, 0, 2, 155, 731]
+[:key_down_raw, 1073741906, 0, 2, 156, 733]
+[:key_down_raw, 1073741906, 0, 2, 157, 735]
+[:key_down_raw, 1073741906, 0, 2, 158, 737]
+[:key_down_raw, 1073741906, 0, 2, 159, 739]
+[:key_down_raw, 1073741906, 0, 2, 160, 741]
+[:key_down_raw, 1073741906, 0, 2, 161, 743]
+[:key_down_raw, 1073741906, 0, 2, 162, 745]
+[:key_down_raw, 1073741906, 0, 2, 163, 747]
+[:key_down_raw, 1073741906, 0, 2, 164, 749]
+[:key_down_raw, 1073741906, 0, 2, 165, 751]
+[:key_down_raw, 1073741906, 0, 2, 166, 753]
+[:key_down_raw, 1073741906, 0, 2, 167, 755]
+[:key_down_raw, 1073741906, 0, 2, 168, 757]
+[:key_down_raw, 1073741906, 0, 2, 169, 759]
+[:key_down_raw, 1073741906, 0, 2, 170, 761]
+[:key_down_raw, 1073741906, 0, 2, 171, 763]
+[:key_down_raw, 1073741906, 0, 2, 172, 765]
+[:key_down_raw, 1073741906, 0, 2, 173, 767]
+[:key_down_raw, 1073741906, 0, 2, 174, 769]
+[:key_down_raw, 1073741906, 0, 2, 175, 771]
+[:key_down_raw, 1073741906, 0, 2, 176, 773]
+[:key_down_raw, 1073741906, 0, 2, 177, 775]
+[:key_down_raw, 1073741906, 0, 2, 178, 777]
+[:key_down_raw, 1073741906, 0, 2, 179, 779]
+[:key_down_raw, 1073741906, 0, 2, 180, 781]
+[:key_down_raw, 1073741906, 0, 2, 181, 783]
+[:key_down_raw, 1073741904, 0, 2, 182, 784]
+[:key_down_raw, 1073741904, 0, 2, 183, 798]
+[:key_down_raw, 1073741904, 0, 2, 184, 800]
+[:key_down_raw, 1073741904, 0, 2, 185, 802]
+[:key_down_raw, 1073741904, 0, 2, 186, 804]
+[:key_down_raw, 1073741904, 0, 2, 187, 806]
+[:key_down_raw, 1073741904, 0, 2, 188, 810]
+[:key_down_raw, 1073741904, 0, 2, 189, 810]
+[:key_down_raw, 1073741904, 0, 2, 190, 814]
+[:key_down_raw, 1073741904, 0, 2, 191, 815]
+[:key_down_raw, 1073741904, 0, 2, 192, 818]
+[:key_down_raw, 1073741904, 0, 2, 193, 819]
+[:key_down_raw, 1073741904, 0, 2, 194, 822]
+[:key_down_raw, 1073741904, 0, 2, 195, 824]
+[:key_up_raw, 1073741906, 0, 2, 196, 824]
+[:key_down_raw, 1073741904, 0, 2, 197, 825]
+[:key_down_raw, 1073741904, 0, 2, 198, 828]
+[:key_up_raw, 1073741904, 0, 2, 199, 828]
+[:key_down_raw, 96, 0, 2, 200, 870]
+[:key_up_raw, 96, 0, 2, 201, 875]
+[:mouse_move, 802, 100, 2, 202, 933]
+[:mouse_move, 803, 100, 2, 203, 934]
+[:mouse_move, 806, 99, 2, 204, 935]
+[:mouse_move, 808, 98, 2, 205, 936]
+[:mouse_move, 813, 96, 2, 206, 937]
+[:mouse_move, 816, 95, 2, 207, 938]
+[:mouse_move, 824, 93, 2, 208, 939]
+[:mouse_move, 827, 92, 2, 209, 940]
+[:mouse_move, 837, 90, 2, 210, 941]
+[:mouse_move, 843, 90, 2, 211, 942]
+[:mouse_move, 857, 89, 2, 212, 943]
+[:mouse_move, 864, 89, 2, 213, 944]
+[:mouse_move, 874, 88, 2, 214, 945]
+[:mouse_move, 876, 88, 2, 215, 946]
+[:mouse_move, 878, 88, 2, 216, 947]
+[:mouse_move, 881, 87, 2, 217, 948]
+[:mouse_move, 882, 87, 2, 218, 950]
+[:mouse_move, 884, 87, 2, 219, 950]
+[:mouse_move, 885, 87, 2, 220, 951]
+[:mouse_move, 887, 87, 2, 221, 952]
+[:key_down_raw, 13, 0, 2, 222, 1047]
diff --git a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/player/player_down_standing.png b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/player/player_down_standing.png
index 9e27489..9e27489 100644
--- a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/player/player_down_standing.png
+++ b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/player/player_down_standing.png
diff --git a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/player/player_left_standing.png b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/player/player_left_standing.png
index 2fea35b..2fea35b 100644
--- a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/player/player_left_standing.png
+++ b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/player/player_left_standing.png
diff --git a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/player/player_right_standing.png b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/player/player_right_standing.png
index 6f3402e..6f3402e 100644
--- a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/player/player_right_standing.png
+++ b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/player/player_right_standing.png
diff --git a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/player/player_up_standing.png b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/player/player_up_standing.png
index 9ebdca7..9ebdca7 100644
--- a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/player/player_up_standing.png
+++ b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/player/player_up_standing.png
diff --git a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/rooms/camera_room.png b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/rooms/camera_room.png
index e0ca375..e0ca375 100644
--- a/samples/07_advanced_rendering/07_splitscreen_camera/sprites/rooms/camera_room.png
+++ b/samples/07_advanced_rendering/08_splitscreen_camera/sprites/rooms/camera_room.png
diff --git a/samples/07_advanced_rendering/08_z_targeting_camera/app/main.rb b/samples/07_advanced_rendering/09_z_targeting_camera/app/main.rb
index ecdbfd3..ecdbfd3 100644
--- a/samples/07_advanced_rendering/08_z_targeting_camera/app/main.rb
+++ b/samples/07_advanced_rendering/09_z_targeting_camera/app/main.rb
diff --git a/samples/07_advanced_rendering/08_z_targeting_camera/metadata/game_metadata.txt b/samples/07_advanced_rendering/09_z_targeting_camera/metadata/game_metadata.txt
index 3ad3a1a..3ad3a1a 100644
--- a/samples/07_advanced_rendering/08_z_targeting_camera/metadata/game_metadata.txt
+++ b/samples/07_advanced_rendering/09_z_targeting_camera/metadata/game_metadata.txt
diff --git a/samples/07_advanced_rendering/08_z_targeting_camera/metadata/icon.png b/samples/07_advanced_rendering/09_z_targeting_camera/metadata/icon.png
index 57254fe..57254fe 100644
--- a/samples/07_advanced_rendering/08_z_targeting_camera/metadata/icon.png
+++ b/samples/07_advanced_rendering/09_z_targeting_camera/metadata/icon.png
diff --git a/samples/07_advanced_rendering/09_z_targeting_camera/replay.txt b/samples/07_advanced_rendering/09_z_targeting_camera/replay.txt
new file mode 100644
index 0000000..db9130a
--- /dev/null
+++ b/samples/07_advanced_rendering/09_z_targeting_camera/replay.txt
@@ -0,0 +1,185 @@
+replay_version 2.0
+stopped_at 741
+seed 100
+recorded_at Sat Jul 17 09:24:36 2021
+[:mouse_button_up, 1, 0, 1, 1, 4]
+[:key_down_raw, 1073741906, 0, 2, 2, 104]
+[:key_down_raw, 1073741906, 0, 2, 3, 118]
+[:key_down_raw, 1073741906, 0, 2, 4, 120]
+[:key_down_raw, 1073741906, 0, 2, 5, 122]
+[:key_down_raw, 1073741906, 0, 2, 6, 124]
+[:key_down_raw, 1073741906, 0, 2, 7, 126]
+[:key_down_raw, 1073741906, 0, 2, 8, 128]
+[:key_down_raw, 1073741906, 0, 2, 9, 130]
+[:key_down_raw, 1073741906, 0, 2, 10, 132]
+[:key_down_raw, 1073741906, 0, 2, 11, 134]
+[:key_down_raw, 1073741906, 0, 2, 12, 136]
+[:key_down_raw, 1073741906, 0, 2, 13, 138]
+[:key_down_raw, 1073741906, 0, 2, 14, 140]
+[:key_down_raw, 1073741906, 0, 2, 15, 142]
+[:key_down_raw, 1073741906, 0, 2, 16, 144]
+[:key_down_raw, 1073741906, 0, 2, 17, 146]
+[:key_down_raw, 1073741906, 0, 2, 18, 148]
+[:key_down_raw, 1073741906, 0, 2, 19, 150]
+[:key_down_raw, 1073741906, 0, 2, 20, 152]
+[:key_down_raw, 1073741906, 0, 2, 21, 154]
+[:key_up_raw, 1073741906, 0, 2, 22, 156]
+[:key_down_raw, 1073741904, 0, 2, 23, 165]
+[:key_down_raw, 1073741904, 0, 2, 24, 180]
+[:key_down_raw, 1073741904, 0, 2, 25, 182]
+[:key_down_raw, 1073741904, 0, 2, 26, 184]
+[:key_down_raw, 1073741904, 0, 2, 27, 186]
+[:key_down_raw, 1073741904, 0, 2, 28, 188]
+[:key_down_raw, 1073741904, 0, 2, 29, 190]
+[:key_down_raw, 1073741904, 0, 2, 30, 192]
+[:key_down_raw, 1073741904, 0, 2, 31, 194]
+[:key_down_raw, 1073741904, 0, 2, 32, 196]
+[:key_down_raw, 1073741904, 0, 2, 33, 198]
+[:key_down_raw, 1073741904, 0, 2, 34, 200]
+[:key_down_raw, 1073741904, 0, 2, 35, 202]
+[:key_down_raw, 1073741904, 0, 2, 36, 204]
+[:key_down_raw, 1073741904, 0, 2, 37, 206]
+[:key_down_raw, 1073741904, 0, 2, 38, 208]
+[:key_down_raw, 1073741904, 0, 2, 39, 210]
+[:key_down_raw, 1073741904, 0, 2, 40, 212]
+[:key_down_raw, 1073741904, 0, 2, 41, 214]
+[:key_down_raw, 1073741904, 0, 2, 42, 216]
+[:key_down_raw, 1073741904, 0, 2, 43, 218]
+[:key_down_raw, 1073741904, 0, 2, 44, 220]
+[:key_down_raw, 1073741904, 0, 2, 45, 222]
+[:key_down_raw, 1073741904, 0, 2, 46, 224]
+[:key_down_raw, 1073741904, 0, 2, 47, 226]
+[:key_down_raw, 1073741904, 0, 2, 48, 228]
+[:key_down_raw, 1073741904, 0, 2, 49, 230]
+[:key_down_raw, 1073741904, 0, 2, 50, 232]
+[:key_down_raw, 1073741904, 0, 2, 51, 234]
+[:key_down_raw, 1073741904, 0, 2, 52, 236]
+[:key_down_raw, 1073741904, 0, 2, 53, 238]
+[:key_down_raw, 1073741904, 0, 2, 54, 240]
+[:key_down_raw, 1073741904, 0, 2, 55, 242]
+[:key_down_raw, 1073741904, 0, 2, 56, 244]
+[:key_down_raw, 1073741904, 0, 2, 57, 246]
+[:key_down_raw, 1073741904, 0, 2, 58, 248]
+[:key_down_raw, 1073741904, 0, 2, 59, 250]
+[:key_down_raw, 1073741904, 0, 2, 60, 252]
+[:key_down_raw, 1073741904, 0, 2, 61, 254]
+[:key_down_raw, 1073741906, 0, 2, 62, 256]
+[:key_down_raw, 1073741906, 0, 2, 63, 271]
+[:key_down_raw, 1073741906, 0, 2, 64, 273]
+[:key_down_raw, 1073741906, 0, 2, 65, 275]
+[:key_down_raw, 1073741906, 0, 2, 66, 277]
+[:key_down_raw, 1073741906, 0, 2, 67, 279]
+[:key_down_raw, 1073741906, 0, 2, 68, 281]
+[:key_down_raw, 1073741906, 0, 2, 69, 283]
+[:key_down_raw, 1073741906, 0, 2, 70, 285]
+[:key_down_raw, 1073741906, 0, 2, 71, 287]
+[:key_down_raw, 1073741906, 0, 2, 72, 289]
+[:key_down_raw, 1073741906, 0, 2, 73, 291]
+[:key_down_raw, 1073741906, 0, 2, 74, 293]
+[:key_down_raw, 1073741906, 0, 2, 75, 295]
+[:key_down_raw, 1073741906, 0, 2, 76, 297]
+[:key_down_raw, 1073741906, 0, 2, 77, 299]
+[:key_down_raw, 1073741906, 0, 2, 78, 301]
+[:key_down_raw, 1073741906, 0, 2, 79, 303]
+[:key_down_raw, 1073741906, 0, 2, 80, 305]
+[:key_down_raw, 1073741906, 0, 2, 81, 307]
+[:key_down_raw, 1073741906, 0, 2, 82, 309]
+[:key_down_raw, 1073741906, 0, 2, 83, 311]
+[:key_down_raw, 1073741906, 0, 2, 84, 313]
+[:key_up_raw, 1073741906, 0, 2, 85, 314]
+[:key_up_raw, 1073741904, 0, 2, 86, 316]
+[:key_down_raw, 1073741903, 0, 2, 87, 338]
+[:key_down_raw, 1073741903, 0, 2, 88, 353]
+[:key_down_raw, 1073741903, 0, 2, 89, 355]
+[:key_down_raw, 1073741903, 0, 2, 90, 357]
+[:key_down_raw, 1073741903, 0, 2, 91, 359]
+[:key_down_raw, 1073741903, 0, 2, 92, 361]
+[:key_down_raw, 1073741903, 0, 2, 93, 363]
+[:key_down_raw, 1073741903, 0, 2, 94, 365]
+[:key_down_raw, 1073741903, 0, 2, 95, 367]
+[:key_down_raw, 1073741903, 0, 2, 96, 369]
+[:key_down_raw, 1073741903, 0, 2, 97, 371]
+[:key_down_raw, 1073741903, 0, 2, 98, 373]
+[:key_down_raw, 1073741903, 0, 2, 99, 375]
+[:key_down_raw, 1073741903, 0, 2, 100, 377]
+[:key_down_raw, 1073741903, 0, 2, 101, 379]
+[:key_down_raw, 1073741903, 0, 2, 102, 381]
+[:key_down_raw, 1073741905, 0, 2, 103, 382]
+[:key_down_raw, 1073741905, 0, 2, 104, 397]
+[:key_down_raw, 1073741905, 0, 2, 105, 399]
+[:key_down_raw, 1073741905, 0, 2, 106, 401]
+[:key_down_raw, 1073741905, 0, 2, 107, 403]
+[:key_down_raw, 1073741905, 0, 2, 108, 405]
+[:key_down_raw, 1073741905, 0, 2, 109, 407]
+[:key_down_raw, 1073741905, 0, 2, 110, 409]
+[:key_down_raw, 1073741905, 0, 2, 111, 411]
+[:key_down_raw, 1073741905, 0, 2, 112, 413]
+[:key_down_raw, 1073741905, 0, 2, 113, 415]
+[:key_down_raw, 1073741905, 0, 2, 114, 417]
+[:key_down_raw, 1073741905, 0, 2, 115, 419]
+[:key_down_raw, 1073741905, 0, 2, 116, 421]
+[:key_down_raw, 1073741905, 0, 2, 117, 423]
+[:key_down_raw, 1073741905, 0, 2, 118, 425]
+[:key_down_raw, 1073741905, 0, 2, 119, 427]
+[:key_down_raw, 1073741905, 0, 2, 120, 429]
+[:key_down_raw, 1073741905, 0, 2, 121, 431]
+[:key_down_raw, 1073741905, 0, 2, 122, 433]
+[:key_up_raw, 1073741905, 0, 2, 123, 435]
+[:key_down_raw, 1073741905, 0, 2, 124, 447]
+[:key_up_raw, 1073741905, 0, 2, 125, 460]
+[:key_down_raw, 1073741905, 0, 2, 126, 485]
+[:key_down_raw, 1073741905, 0, 2, 127, 500]
+[:key_down_raw, 1073741905, 0, 2, 128, 502]
+[:key_down_raw, 1073741905, 0, 2, 129, 504]
+[:key_down_raw, 1073741905, 0, 2, 130, 506]
+[:key_up_raw, 1073741905, 0, 2, 131, 507]
+[:key_up_raw, 1073741903, 0, 2, 132, 548]
+[:key_down_raw, 1073741905, 0, 2, 133, 561]
+[:key_down_raw, 1073741905, 0, 2, 134, 576]
+[:key_down_raw, 1073741905, 0, 2, 135, 578]
+[:key_down_raw, 1073741905, 0, 2, 136, 580]
+[:key_down_raw, 1073741905, 0, 2, 137, 582]
+[:key_up_raw, 1073741905, 0, 2, 138, 584]
+[:key_down_raw, 96, 0, 2, 139, 648]
+[:key_up_raw, 96, 0, 2, 140, 653]
+[:mouse_move, 815, 98, 2, 141, 654]
+[:mouse_move, 816, 101, 2, 142, 655]
+[:mouse_move, 816, 104, 2, 143, 656]
+[:mouse_move, 816, 112, 2, 144, 657]
+[:mouse_move, 816, 117, 2, 145, 658]
+[:mouse_move, 810, 130, 2, 146, 659]
+[:mouse_move, 803, 137, 2, 147, 660]
+[:mouse_move, 782, 157, 2, 148, 661]
+[:mouse_move, 767, 168, 2, 149, 662]
+[:mouse_move, 734, 188, 2, 150, 663]
+[:mouse_move, 716, 197, 2, 151, 664]
+[:mouse_move, 682, 215, 2, 152, 665]
+[:mouse_move, 665, 223, 2, 153, 666]
+[:mouse_move, 645, 234, 2, 154, 667]
+[:mouse_move, 643, 235, 2, 155, 668]
+[:mouse_move, 643, 236, 2, 156, 669]
+[:mouse_move, 647, 237, 2, 157, 672]
+[:mouse_move, 670, 244, 2, 158, 673]
+[:mouse_move, 687, 245, 2, 159, 674]
+[:mouse_move, 720, 242, 2, 160, 675]
+[:mouse_move, 737, 237, 2, 161, 676]
+[:mouse_move, 764, 224, 2, 162, 677]
+[:mouse_move, 777, 216, 2, 163, 678]
+[:mouse_move, 796, 197, 2, 164, 679]
+[:mouse_move, 804, 187, 2, 165, 680]
+[:mouse_move, 815, 164, 2, 166, 681]
+[:mouse_move, 820, 152, 2, 167, 682]
+[:mouse_move, 825, 142, 2, 168, 683]
+[:mouse_move, 831, 128, 2, 169, 684]
+[:mouse_move, 832, 126, 2, 170, 685]
+[:mouse_move, 832, 125, 2, 171, 686]
+[:mouse_move, 833, 123, 2, 172, 688]
+[:mouse_move, 836, 120, 2, 173, 690]
+[:mouse_move, 837, 118, 2, 174, 691]
+[:mouse_move, 842, 113, 2, 175, 692]
+[:mouse_move, 844, 112, 2, 176, 693]
+[:mouse_move, 844, 111, 2, 177, 694]
+[:mouse_move, 844, 110, 2, 178, 696]
+[:mouse_move, 845, 110, 2, 179, 697]
+[:mouse_move, 845, 109, 2, 180, 699]
+[:key_down_raw, 13, 0, 2, 181, 741]
diff --git a/samples/07_advanced_rendering/08_z_targeting_camera/sprites/arena.png b/samples/07_advanced_rendering/09_z_targeting_camera/sprites/arena.png
index 5c92e91..5c92e91 100644
--- a/samples/07_advanced_rendering/08_z_targeting_camera/sprites/arena.png
+++ b/samples/07_advanced_rendering/09_z_targeting_camera/sprites/arena.png
diff --git a/samples/07_advanced_rendering/08_z_targeting_camera/sprites/player.png b/samples/07_advanced_rendering/09_z_targeting_camera/sprites/player.png
index 332a80b..332a80b 100644
--- a/samples/07_advanced_rendering/08_z_targeting_camera/sprites/player.png
+++ b/samples/07_advanced_rendering/09_z_targeting_camera/sprites/player.png
diff --git a/samples/07_advanced_rendering/08_z_targeting_camera/sprites/square/black.png b/samples/07_advanced_rendering/09_z_targeting_camera/sprites/square/black.png
index cea7bd7..cea7bd7 100644
--- a/samples/07_advanced_rendering/08_z_targeting_camera/sprites/square/black.png
+++ b/samples/07_advanced_rendering/09_z_targeting_camera/sprites/square/black.png
diff --git a/samples/07_advanced_rendering/10_blend_modes/app/main.rb b/samples/07_advanced_rendering/10_blend_modes/app/main.rb
new file mode 100644
index 0000000..7e28ba8
--- /dev/null
+++ b/samples/07_advanced_rendering/10_blend_modes/app/main.rb
@@ -0,0 +1,49 @@
+$gtk.reset
+
+def draw_blendmode args, mode
+  w = 160
+  h = w
+  args.state.x += (1280-w) / (args.state.blendmodes.length + 1)
+  x = args.state.x
+  y = (720 - h) / 2
+  s = 'sprites/blue-feathered.png'
+  args.outputs.sprites << { blendmode_enum: mode.value, x: x, y: y, w: w, h: h, path: s }
+  args.outputs.labels << [x + (w/2), y, mode.name.to_s, 1, 1, 255, 255, 255]
+end
+
+def tick args
+
+  # Different blend modes do different things, depending on what they
+  # blend against (in this case, the pixels of the background color).
+  args.state.bg_element ||= 1
+  args.state.bg_color ||= 255
+  args.state.bg_color_direction ||= 1
+  bg_r = (args.state.bg_element == 1) ? args.state.bg_color : 0
+  bg_g = (args.state.bg_element == 2) ? args.state.bg_color : 0
+  bg_b = (args.state.bg_element == 3) ? args.state.bg_color : 0
+  args.state.bg_color += args.state.bg_color_direction
+  if (args.state.bg_color_direction > 0) && (args.state.bg_color >= 255)
+    args.state.bg_color_direction = -1
+    args.state.bg_color = 255
+  elsif (args.state.bg_color_direction < 0) && (args.state.bg_color <= 0)
+    args.state.bg_color_direction = 1
+    args.state.bg_color = 0
+    args.state.bg_element += 1
+    if args.state.bg_element >= 4
+      args.state.bg_element = 1
+    end
+  end
+
+  args.outputs.background_color = [ bg_r, bg_g, bg_b, 255 ]
+
+  args.state.blendmodes ||= [
+    { name: :none,  value: 0 },
+    { name: :blend, value: 1 },
+    { name: :add,   value: 2 },
+    { name: :mod,   value: 3 },
+    { name: :mul,   value: 4 }
+  ]
+
+  args.state.x = 0  # reset this, draw_blendmode will increment it.
+  args.state.blendmodes.each { |blendmode| draw_blendmode args, blendmode }
+end
diff --git a/samples/07_advanced_rendering/10_blend_modes/sprites/blue-feathered.png b/samples/07_advanced_rendering/10_blend_modes/sprites/blue-feathered.png
new file mode 100644
index 0000000..a8bf6b5
--- /dev/null
+++ b/samples/07_advanced_rendering/10_blend_modes/sprites/blue-feathered.png
diff --git a/samples/07_advanced_rendering/11_render_target_noclear/app/main.rb b/samples/07_advanced_rendering/11_render_target_noclear/app/main.rb
new file mode 100644
index 0000000..9e5dffd
--- /dev/null
+++ b/samples/07_advanced_rendering/11_render_target_noclear/app/main.rb
@@ -0,0 +1,47 @@
+def tick args
+  args.state.x ||= 500
+  args.state.y ||= 350
+  args.state.xinc ||= 7
+  args.state.yinc ||= 7
+  args.state.bgcolor ||= 1
+  args.state.bginc ||= 1
+
+  # clear the render target on the first tick, and then never again. Draw
+  #  another box to it every tick, accumulating over time.
+  clear_target = (args.state.tick_count == 0) || (args.inputs.keyboard.key_down.space)
+  args.render_target(:accumulation).background_color = [ 0, 0, 0, 0 ];
+  args.render_target(:accumulation).clear_before_render = clear_target
+  args.render_target(:accumulation).solids << [args.state.x, args.state.y, 25, 25, 255, 0, 0, 255];
+  args.state.x += args.state.xinc
+  args.state.y += args.state.yinc
+  args.state.bgcolor += args.state.bginc
+
+  # animation upkeep...change where we draw the next box and what color the
+  #  window background will be.
+  if args.state.xinc > 0 && args.state.x >= 1280
+    args.state.xinc = -7
+  elsif args.state.xinc < 0 && args.state.x < 0
+    args.state.xinc = 7
+  end
+
+  if args.state.yinc > 0 && args.state.y >= 720
+    args.state.yinc = -7
+  elsif args.state.yinc < 0 && args.state.y < 0
+    args.state.yinc = 7
+  end
+
+  if args.state.bginc > 0 && args.state.bgcolor >= 255
+    args.state.bginc = -1
+  elsif args.state.bginc < 0 && args.state.bgcolor <= 0
+    args.state.bginc = 1
+  end
+
+  # clear the screen to a shade of blue and draw the render target, which
+  #  is not clearing every frame, on top of it. Note that you can NOT opt to
+  #  skip clearing the screen, only render targets. The screen clears every
+  #  frame; double-buffering would prevent correct updates between frames.
+  args.outputs.background_color = [ 0, 0, args.state.bgcolor, 255 ]
+  args.outputs.sprites << [ 0, 0, 1280, 720, :accumulation ]
+end
+
+$gtk.reset
diff --git a/samples/07_advanced_rendering/11_render_target_noclear/metadata/game_metadata.txt b/samples/07_advanced_rendering/11_render_target_noclear/metadata/game_metadata.txt
new file mode 100644
index 0000000..3d0bd06
--- /dev/null
+++ b/samples/07_advanced_rendering/11_render_target_noclear/metadata/game_metadata.txt
@@ -0,0 +1,5 @@
+devid=dragonruby
+devtitle=DragonRuby LLC
+gameid=render_target_noclear
+gametitle=Render targets that don't clear every frame.
+version=1.0