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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
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