1 files changed, 106 insertions, 0 deletions
diff --git a/samples/07_advanced_rendering/09_z_targeting_camera/app/main.rb b/samples/07_advanced_rendering/09_z_targeting_camera/app/main.rb
new file mode 100644
index 0000000..ecdbfd3
--- /dev/null
+++ b/samples/07_advanced_rendering/09_z_targeting_camera/app/main.rb
@@ -0,0 +1,106 @@
+class Game
+  attr_gtk
+
+  def tick
+    defaults
+    render
+    input
+    calc
+  end
+
+  def defaults
+    outputs.background_color = [219, 208, 191]
+    player.x        ||= 634
+    player.y        ||= 153
+    player.angle    ||= 90
+    player.distance ||= arena_radius
+    target.x        ||= 634
+    target.y        ||= 359
+  end
+
+  def render
+    outputs[:scene].sprites << ([0, 0, 933, 700, 'sprites/arena.png'].center_inside_rect grid.rect)
+    outputs[:scene].sprites << target_sprite
+    outputs[:scene].sprites << player_sprite
+    outputs.sprites << scene
+  end
+
+  def target_sprite
+    {
+      x: target.x, y: target.y,
+      w: 10, h: 10,
+      path: 'sprites/square/black.png'
+    }.anchor_rect 0.5, 0.5
+  end
+
+  def input
+    if inputs.up && player.distance > 30
+      player.distance -= 2
+    elsif inputs.down && player.distance < 200
+      player.distance += 2
+    end
+
+    player.angle += inputs.left_right * -1
+  end
+
+  def calc
+    player.x = target.x + ((player.angle *  1).vector_x player.distance)
+    player.y = target.y + ((player.angle * -1).vector_y player.distance)
+  end
+
+  def player_sprite
+    {
+      x: player.x,
+      y: player.y,
+      w: 50,
+      h: 100,
+      path: 'sprites/player.png',
+      angle: (player.angle * -1) + 90
+    }.anchor_rect 0.5, 0
+  end
+
+  def center_map
+    { x: 634, y: 359 }
+  end
+
+  def zoom_factor_single
+    2 - ((args.geometry.distance player, center_map).fdiv arena_radius)
+  end
+
+  def zoom_factor
+    zoom_factor_single ** 2
+  end
+
+  def arena_radius
+    206
+  end
+
+  def scene
+    {
+      x:    (640 - player.x) + (640 - (640 * zoom_factor)),
+      y:    (360 - player.y - (75 * zoom_factor)) + (320 - (320 * zoom_factor)),
+      w:    1280 * zoom_factor,
+      h:     720 * zoom_factor,
+      path: :scene,
+      angle: player.angle - 90,
+      angle_anchor_x: (player.x.fdiv 1280),
+      angle_anchor_y: (player.y.fdiv 720)
+    }
+  end
+
+  def player
+    state.player
+  end
+
+  def target
+    state.target
+  end
+end
+
+def tick args
+  $game ||= Game.new
+  $game.args = args
+  $game.tick
+end
+
+$gtk.reset