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simplified indicator shader

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laochailan 2017-03-21 18:16:09 +01:00
parent 271461cfd5
commit f3b89768e0
1 changed files with 2 additions and 8 deletions
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shader/circleclipped_indicator.sha
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@ -21,17 +21,11 @@ uniform vec4 back_color;
varying vec4 TexCoord0;
bool tc_in_sector(vec2 tc, float fill) {
float a = tan(PI * (2.0 * fill - 0.5));
float y = a * (tc.x - 0.5) + 0.5;
bool f = tc.y < y;
return tc.x > 0.5 ? (fill > 0.5 ? true : f) : (fill > 0.5 ? !f : false);
}
void main(void) {
vec2 tc = TexCoord0.xy;
vec4 texel = texture2D(tex, tc);
tc *= tcfactor;
texel *= mix(back_color, fill_color, float(tc_in_sector(tc, fill)));
tc -= vec2(0.5);
texel *= mix(back_color, fill_color, float(-atan(tc.x,-tc.y) > PI*(2.0*fill-1.0)));
gl_FragColor = texel;
}