diff options
Diffstat (limited to 'src/imports/shapes/shaders/conicalgradient_core.frag')
-rw-r--r-- | src/imports/shapes/shaders/conicalgradient_core.frag | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/imports/shapes/shaders/conicalgradient_core.frag b/src/imports/shapes/shaders/conicalgradient_core.frag new file mode 100644 index 0000000000..e18b80159a --- /dev/null +++ b/src/imports/shapes/shaders/conicalgradient_core.frag @@ -0,0 +1,22 @@ +#version 150 core + +#define INVERSE_2PI 0.1591549430918953358 + +uniform sampler2D gradTabTexture; +uniform float opacity; + +uniform float angle; + +in vec2 coord; + +out vec4 fragColor; + +void main() +{ + float t; + if (abs(coord.y) == abs(coord.x)) + t = (atan(-coord.y + 0.002, coord.x) + angle) * INVERSE_2PI; + else + t = (atan(-coord.y, coord.x) + angle) * INVERSE_2PI; + fragColor = texture(gradTabTexture, vec2(t - floor(t), 0.5)) * opacity; +} |