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border radius for quads

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Illusion
2023-12-11 23:00:31 +02:00
committed by Illusion
parent 307b44d7e4
commit 0de6955a9b
8 changed files with 63 additions and 36 deletions
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shaders/ui.frag
+26 -2
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@@ -1,9 +1,33 @@
#version 330 core
in vec2 texCoords;
in vec2 v_TexCoords;
out vec4 FragColor;
uniform vec4 aColor;
uniform float borderRadius;
uniform float uiWidth;
uniform float uiHeight;
const float smoothness = 1.0;
void main() {
FragColor = vec4(aColor);
float alpha = aColor.a;
if (borderRadius > 0.0) {
vec2 dimensions = v_TexCoords * vec2(uiWidth, uiHeight);
float xMax = uiWidth - borderRadius;
float yMax = uiHeight - borderRadius;
if (dimensions.x < borderRadius && dimensions.y < borderRadius) {
alpha *= 1.0 - smoothstep(borderRadius - smoothness, borderRadius + smoothness, length(dimensions - vec2(borderRadius)));
} else if (dimensions.x < borderRadius && dimensions.y > yMax) {
alpha *= 1.0 - smoothstep(borderRadius - smoothness, borderRadius + smoothness, length(dimensions - vec2(borderRadius, yMax)));
} else if (dimensions.x > xMax && dimensions.y < borderRadius) {
alpha *= 1.0 - smoothstep(borderRadius - smoothness, borderRadius + smoothness, length(dimensions - vec2(xMax, borderRadius)));
} else if (dimensions.x > xMax && dimensions.y > yMax) {
alpha *= 1.0 - smoothstep(borderRadius - smoothness, borderRadius + smoothness, length(dimensions - vec2(xMax, yMax)));
}
}
FragColor = vec4(aColor.rgb, alpha);
}