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fbe2952346
The AutoInvertColors shader has been updated to make shapes hollow, similar to how the marching ants outline works.
25 lines
746 B
Plaintext
25 lines
746 B
Plaintext
uniform float width : hint_range(0, 2) = 0.05;
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bool is_zero_approx(float num) {
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return num < 0.0001;
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}
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bool has_contrary_neighbour(vec2 uv, vec2 texture_pixel_size, sampler2D tex) {
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float i = -ceil(width);
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float j = ceil(width);
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float x1 = abs(i) > width ? width * sign(i) : i;
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float x2 = abs(j) > width ? width * sign(j) : j;
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float y1 = abs(i) > width ? width * sign(i) : i;
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float y2 = abs(j) > width ? width * sign(j) : j;
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vec2 xy1 = uv + texture_pixel_size * vec2(x1, y1);
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vec2 xy2 = uv + texture_pixel_size * vec2(x2, y2);
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if (xy1 != clamp(xy1, vec2(0.0), vec2(1.0)) || is_zero_approx(texture(tex, xy1).a) || xy2 != clamp(xy2, vec2(0.0), vec2(1.0)) || is_zero_approx(texture(tex, xy2).a)) {
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return true;
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}
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return false;
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}
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