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26 lines
1.1 KiB
Plaintext
26 lines
1.1 KiB
Plaintext
#pragma aego abi 1
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#pragma domain sprite
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#include "engine/sprite.glsl"
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#pragma material
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uniform float GridPixels; // @default(1) @range(1, 32) @unit("physical pixels")
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uniform float Strength; // @instance @default(1) @range(0, 1)
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uniform float Opacity; // @instance @default(1) @range(0, 1)
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#pragma end
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void vertex() {
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vec4 clip = aego_view_proj * vec4(aego_world, 1.0);
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vec2 size = max(aego_viewport.zw, vec2(1.0));
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// Viewport is already measured in physical target pixels, including DPR and
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// offscreen render scale. Applying aego_pixel_scale again would double it.
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vec2 direction = vec2(1.0, aego_clip_to_pixel_y < 0.0 ? -1.0 : 1.0);
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vec2 pixel = (clip.xy / clip.w * direction * 0.5 + 0.5) * size + aego_viewport.xy;
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float grid = max(GridPixels, 1.0);
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vec2 snapped = floor(pixel / grid + 0.5) * grid;
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pixel = mix(pixel, snapped, clamp(Strength, 0.0, 1.0));
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clip.xy = ((pixel - aego_viewport.xy) / size * 2.0 - 1.0) * direction * clip.w;
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vec4 world = inverse(aego_view_proj) * clip;
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aego_world = world.xyz / world.w;
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}
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void fragment() {
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aego_out = aego_sample() * clamp(Opacity, 0.0, 1.0);
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}
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