24 lines
737 B
Plaintext
24 lines
737 B
Plaintext
shader_type canvas_item;
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#include "res://game/shaders/random_color.gdshaderinc"
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uniform float chance : hint_range(0.0, 1.0) = 0.3;
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uniform float edge_width : hint_range(0, 100) = 4.0;
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uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_nearest_mipmap;
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void fragment() {
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vec4 screen_color = texture(SCREEN_TEXTURE, SCREEN_UV);
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COLOR = random_color(screen_color, UV, chance);
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float dist_left = UV.x / fwidth(UV.x);
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float dist_right = (1.0 - UV.x) / fwidth(UV.x);
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float dist_bottom = UV.y / fwidth(UV.y);
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float dist_top = (1.0 - UV.y) / fwidth(UV.y);
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float pixel_dist = min(min(dist_left, dist_right), min(dist_bottom, dist_top));
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float fade = clamp(pixel_dist / edge_width, 0.0, 1.0);
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COLOR.a *= fade;
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}
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