66 lines
1.1 KiB
Plaintext
66 lines
1.1 KiB
Plaintext
@vs circle_vs
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in vec2 vertex;
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in vec2 apos;
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in float aradius;
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in vec4 acolor;
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in float asegsize;
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in float afill;
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out vec2 coords;
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out vec4 fcolor;
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out float segsize;
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out float fill;
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out float radius;
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uniform cvs_params { mat4 proj; };
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void main()
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{
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gl_Position = proj * vec4((vertex * aradius) + apos, 0.0, 1.0);
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coords = vertex;
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fcolor = acolor;
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segsize = asegsize;
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fill = afill;
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radius = aradius;
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}
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@end
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@fs circle_fs
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out vec4 color;
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in vec2 coords;
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in vec4 fcolor;
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in float segsize;
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in float fill;
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in float radius;
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#define PI 3.14
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void main()
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{
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float px = 1/radius;
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float R1 = 1.f;
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float R2 = 1.0 - fill;
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float dist = sqrt(pow(coords.x,2) + pow(coords.y,2));
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color = fcolor;
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// if (dist < R2 || dist > R1)
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// discard;
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float sm = 1 - smoothstep(R1-px,R1,dist);
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float sm2 = smoothstep(R2-px,R2,dist);
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float a = sm*sm2;
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color = mix(vec4(0,0,0,0), fcolor, a);
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if (segsize<0)
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return;
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float f = atan(coords.y, coords.x) + PI;
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if (mod(f, segsize) < segsize/2)
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discard;
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}
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@end
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@program circle circle_vs circle_fs |