diff options
Diffstat (limited to 'source/blender/draw/engines/overlay/shaders/edit_gpencil_canvas_vert.glsl')
-rw-r--r-- | source/blender/draw/engines/overlay/shaders/edit_gpencil_canvas_vert.glsl | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/source/blender/draw/engines/overlay/shaders/edit_gpencil_canvas_vert.glsl b/source/blender/draw/engines/overlay/shaders/edit_gpencil_canvas_vert.glsl new file mode 100644 index 00000000000..5aa7fe78e4e --- /dev/null +++ b/source/blender/draw/engines/overlay/shaders/edit_gpencil_canvas_vert.glsl @@ -0,0 +1,35 @@ + +uniform vec4 color; +uniform vec3 xAxis; +uniform vec3 yAxis; +uniform vec3 origin; +uniform int halfLineCount; + +flat out vec4 finalColor; +flat out vec2 edgeStart; +noperspective out vec2 edgePos; + +void main() +{ + GPU_INTEL_VERTEX_SHADER_WORKAROUND + + vec2 pos; + pos.x = float(gl_VertexID % 2); + pos.y = float(gl_VertexID / 2) / float(halfLineCount - 1); + + if (pos.y > 1.0) { + pos.xy = pos.yx; + pos.x -= 1.0 + 1.0 / float(halfLineCount - 1); + } + + pos -= 0.5; + + vec3 world_pos = xAxis * pos.x + yAxis * pos.y + origin; + + gl_Position = point_world_to_ndc(world_pos); + + finalColor = color; + + /* Convert to screen position [0..sizeVp]. */ + edgePos = edgeStart = ((gl_Position.xy / gl_Position.w) * 0.5 + 0.5) * sizeViewport.xy; +} |