diff options
Diffstat (limited to 'source/blender/gpu/shaders/gpu_shader_edges_overlay_simple_geom.glsl')
-rw-r--r-- | source/blender/gpu/shaders/gpu_shader_edges_overlay_simple_geom.glsl | 64 |
1 files changed, 34 insertions, 30 deletions
diff --git a/source/blender/gpu/shaders/gpu_shader_edges_overlay_simple_geom.glsl b/source/blender/gpu/shaders/gpu_shader_edges_overlay_simple_geom.glsl index ec692e210c2..12f5a2c7811 100644 --- a/source/blender/gpu/shaders/gpu_shader_edges_overlay_simple_geom.glsl +++ b/source/blender/gpu/shaders/gpu_shader_edges_overlay_simple_geom.glsl @@ -1,5 +1,5 @@ layout(triangles) in; -layout(triangle_strip, max_vertices=3) out; +layout(triangle_strip, max_vertices = 3) out; uniform float outlineWidth = 1.0; uniform vec2 viewportSize; @@ -7,46 +7,50 @@ uniform vec2 viewportSize; noperspective out vec3 distanceToOutline; // project to screen space -vec2 proj(int axis) { - vec4 pos = gl_in[axis].gl_Position; - return (0.5 * (pos.xy / pos.w) + 0.5) * viewportSize; +vec2 proj(int axis) +{ + vec4 pos = gl_in[axis].gl_Position; + return (0.5 * (pos.xy / pos.w) + 0.5) * viewportSize; } -float dist(vec2 pos[3], int v) { - // current vertex position - vec2 vpos = pos[v]; - // endpoints of opposite edge - vec2 e1 = pos[(v + 1) % 3]; - vec2 e2 = pos[(v + 2) % 3]; +float dist(vec2 pos[3], int v) +{ + // current vertex position + vec2 vpos = pos[v]; + // endpoints of opposite edge + vec2 e1 = pos[(v + 1) % 3]; + vec2 e2 = pos[(v + 2) % 3]; - float abs_det = length(cross(vec3(vpos - e1, 0), vec3(vpos - e2, 0))); // could simplify - return abs_det / distance(e2, e1); + float abs_det = length(cross(vec3(vpos - e1, 0), vec3(vpos - e2, 0))); // could simplify + return abs_det / distance(e2, e1); } vec3 distance[3]; -void modulateEdge(int v) { - float offset = 0.5 * outlineWidth; - for (int i = 0; i < 3; ++i) - distance[i][v] -= offset; +void modulateEdge(int v) +{ + float offset = 0.5 * outlineWidth; + for (int i = 0; i < 3; ++i) + distance[i][v] -= offset; } -void main() { - vec2 pos[3] = vec2[3](proj(0), proj(1), proj(2)); +void main() +{ + vec2 pos[3] = vec2[3](proj(0), proj(1), proj(2)); - for (int v = 0; v < 3; ++v) - distance[v] = vec3(0); + for (int v = 0; v < 3; ++v) + distance[v] = vec3(0); - for (int v = 0; v < 3; ++v) { - distance[v][v] = dist(pos, v); - modulateEdge(v); - } + for (int v = 0; v < 3; ++v) { + distance[v][v] = dist(pos, v); + modulateEdge(v); + } - for (int v = 0; v < 3; ++v) { - gl_Position = gl_in[v].gl_Position; - distanceToOutline = distance[v]; - EmitVertex(); - } + for (int v = 0; v < 3; ++v) { + gl_Position = gl_in[v].gl_Position; + distanceToOutline = distance[v]; + EmitVertex(); + } - EndPrimitive(); + EndPrimitive(); } |