22 lines
442 B
Plaintext
22 lines
442 B
Plaintext
shader_type canvas_item;
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uniform sampler2D trail_texture;
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uniform float decay_factor;
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void fragment() {
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vec3 orig = texture(trail_texture, UV).rgb;
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float trail = orig.r;
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float sum = 0.0;
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for(float i=-1.0;i<=1.5;i++) {
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for(float j=-1.0;j<=1.5;j++) {
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vec2 offset = vec2(i,j);
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sum += texture(trail_texture, UV + vec2(i,j)).g;
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}
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}
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trail = sum / 9.0;
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trail = trail * decay_factor;
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COLOR = vec4(trail, orig.g, orig.b, 1.0);
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}
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