1 files changed, 25 insertions, 0 deletions
diff --git a/src/quickshapes/shaders_ng/conicalgradient.frag b/src/quickshapes/shaders_ng/conicalgradient.frag
new file mode 100644
index 0000000000..0b1e01bae2
--- /dev/null
+++ b/src/quickshapes/shaders_ng/conicalgradient.frag
@@ -0,0 +1,25 @@
+#version 440
+
+layout(location = 0) in vec2 coord;
+layout(location = 0) out vec4 fragColor;
+
+layout(binding = 1) uniform sampler2D gradTabTexture;
+
+layout(std140, binding = 0) uniform buf {
+    mat4 matrix;
+    vec2 translationPoint;
+    float angle;
+    float opacity;
+} ubuf;
+
+#define INVERSE_2PI 0.1591549430918953358
+
+void main()
+{
+    float t;
+    if (abs(coord.y) == abs(coord.x))
+        t = (atan(-coord.y + 0.002, coord.x) + ubuf.angle) * INVERSE_2PI;
+    else
+        t = (atan(-coord.y, coord.x) + ubuf.angle) * INVERSE_2PI;
+    fragColor = texture(gradTabTexture, vec2(t - floor(t), 0.5)) * ubuf.opacity;
+}