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allow 360 degrees of freedom in gradients

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This commit is contained in:
vaxerski
2022-11-26 19:37:20 +00:00
parent 493fc00953
commit afe688e6ab
2 changed files with 19 additions and 2 deletions
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19
src/render/shaders/Border.hpp
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@@ -23,7 +23,24 @@ vec4 getColorForCoord(vec2 normalizedCoord) {
if (gradientLength < 2)
return gradient[0];
float sine = sin(angle);
float finalAng = 0.0;
if (angle > 4.71 /* 270 deg */) {
normalizedCoord[1] = 1.0 - normalizedCoord[1];
finalAng = 6.28 - angle;
} else if (angle > 3.14 /* 180 deg */) {
normalizedCoord[0] = 1.0 - normalizedCoord[0];
normalizedCoord[1] = 1.0 - normalizedCoord[1];
finalAng = angle - 3.14;
} else if (angle > 1.57 /* 90 deg */) {
normalizedCoord[0] = 1.0 - normalizedCoord[0];
finalAng = 3.14 - angle;
} else {
finalAng = angle;
}
float sine = sin(finalAng);
float progress = (normalizedCoord[1] * sine + normalizedCoord[0] * (1.0 - sine)) * float(gradientLength - 1);
int bottom = int(floor(progress));
int top = bottom + 1;