diff options
Diffstat (limited to 'source/blender/draw/engines/gpencil/shaders/fx/gpencil_fx_wave_frag.glsl')
-rw-r--r-- | source/blender/draw/engines/gpencil/shaders/fx/gpencil_fx_wave_frag.glsl | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/source/blender/draw/engines/gpencil/shaders/fx/gpencil_fx_wave_frag.glsl b/source/blender/draw/engines/gpencil/shaders/fx/gpencil_fx_wave_frag.glsl new file mode 100644 index 00000000000..882b2cf59f1 --- /dev/null +++ b/source/blender/draw/engines/gpencil/shaders/fx/gpencil_fx_wave_frag.glsl @@ -0,0 +1,40 @@ + +out vec4 FragColor; + +uniform sampler2D strokeColor; +uniform sampler2D strokeDepth; + +uniform float amplitude; +uniform float period; +uniform float phase; +uniform int orientation; +uniform vec2 wsize; + +#define M_PI 3.1415926535897932384626433832795 + +#define HORIZONTAL 0 +#define VERTICAL 1 + +void main() +{ + vec4 outcolor; + ivec2 uv = ivec2(gl_FragCoord.xy); + float stroke_depth; + + float value; + if (orientation == HORIZONTAL) { + float pval = (uv.x * M_PI) / wsize[0]; + value = amplitude * sin((period * pval) + phase); + outcolor = texelFetch(strokeColor, ivec2(uv.x, uv.y + value), 0); + stroke_depth = texelFetch(strokeDepth, ivec2(uv.x, uv.y + value), 0).r; + } + else { + float pval = (uv.y * M_PI) / wsize[1]; + value = amplitude * sin((period * pval) + phase); + outcolor = texelFetch(strokeColor, ivec2(uv.x + value, uv.y), 0); + stroke_depth = texelFetch(strokeDepth, ivec2(uv.x + value, uv.y), 0).r; + } + + FragColor = outcolor; + gl_FragDepth = stroke_depth; +} |