synced samples

1 files changed, 52 insertions, 0 deletions

diff --git a/samples/07_advanced_rendering/01_simple_render_targets/app/main.rb b/samples/07_advanced_rendering/01_simple_render_targets/app/main.rb
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index 0000000..8670453
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+++ b/samples/07_advanced_rendering/01_simple_render_targets/app/main.rb
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+def tick args
+  # args.outputs.render_targets are really really powerful.
+  # They essentially allow you to create a sprite programmatically and cache the result.
+
+  # Create a render_target of a :block and a :gradient on tick zero.
+  if args.state.tick_count == 0
+    args.render_target(:block).solids << [0, 0, 1280, 100]
+
+    # The gradient is actually just a collection of black solids with increasing
+    # opacities.
+    args.render_target(:gradient).solids << 90.map_with_index do |x|
+      50.map_with_index do |y|
+        [x * 15, y * 15, 15, 15, 0, 0, 0, (x * 3).fdiv(255) * 255]
+      end
+    end
+  end
+
+  # Take the :block render_target and present it horizontally centered.
+  # Use a subsection of the render_targetd specified by source_x,
+  # source_y, source_w, source_h.
+  args.outputs.sprites << { x: 0,
+                            y: 310,
+                            w: 1280,
+                            h: 100,
+                            path: :block,
+                            source_x: 0,
+                            source_y: 0,
+                            source_w: 1280,
+                            source_h: 100 }
+
+  # After rendering :block, render gradient on top of :block.
+  args.outputs.sprites << [0, 0, 1280, 720, :gradient]
+
+  args.outputs.labels  << [1270, 710, args.gtk.current_framerate, 0, 2, 255, 255, 255]
+  tick_instructions args, "Sample app shows how to use render_targets (programmatically create cached sprites)."
+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
+
+$gtk.reset