29 lines
543 B
Plaintext
29 lines
543 B
Plaintext
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layout (location = 0) uniform sampler2D u_tex;
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layout (location = 1) uniform float u_alpha;
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in vec2 v_pos;
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in vec2 v_size;
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in vec2 v_uv_pos;
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in vec2 v_uv_size;
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in vec2 v_dp;
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in vec4 v_color;
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out vec4 o_color;
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void main(void) {
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vec2 dp = v_dp;
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dp *= pow(length(dp), .1);
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vec2 uvp = (dp - v_pos) / v_size;
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vec2 uv = uvp*v_uv_size + v_uv_pos;
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uvp = abs(uvp);
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float a =
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texture(u_tex, uv).r *
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step(abs(uvp.x-.5), .5) *
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step(abs(uvp.y-.5), .5);
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o_color = v_color;
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o_color.a *= a*u_alpha;
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}
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