26 lines
793 B
GLSL
26 lines
793 B
GLSL
shader_type canvas_item;
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uniform vec2 brush_size = vec2(0.25, 0.25);
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uniform float pattern_scale = 10.0;
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uniform float pattern_angle = 0.0;
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// BEGIN_PATTERN
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float brush_function(vec2 uv) {
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return clamp(max(0.0, 1.0-length(2.0*(uv-vec2(0.5)))) / 0.5, 0.0, 1.0);
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}
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vec4 pattern_function(vec2 uv) {
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return vec4(fract(10.0*uv.x+length(uv-vec2(0.5))*10.0), 0.0, 0.0, 1.0);
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}
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// END_PATTERN
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vec4 pattern_color(vec2 uv) {
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mat2 texture_rotation = mat2(vec2(cos(pattern_angle), sin(pattern_angle)), vec2(-sin(pattern_angle), cos(pattern_angle)));
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vec2 pattern_uv = pattern_scale*texture_rotation*(vec2(brush_size.y/brush_size.x, 1.0)*(uv - vec2(0.5, 0.5)));
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return pattern_function(fract(pattern_uv));
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}
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void fragment() {
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COLOR = pattern_color(UV) * vec4(1.0, 1.0, 1.0, 0.5);
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}
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