Setup multiple target basic shaders

2021-08-31 20:05:15 +01:00
parent 146bab6fe3
commit cf77163b3f
21 changed files with 381 additions and 28 deletions
@@ -0,0 +1,40 @@
+#version 430 core
+layout (triangles) in;
+layout (triangle_strip, max_vertices = 4) out;
+layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
+in vec4 vCol[];
+out vec4 gColC; // center color
+out vec4 gColE; // edge color
+out vec2 gBoundingBox;
+out vec3 gPos;
+
+void main()
+{
+  vec4 pat = gl_in[0].gl_Position;
+  vec4 pbt = gl_in[1].gl_Position;
+  vec4 pct = gl_in[2].gl_Position;
+  vec4 pa = theMat * pat;
+  vec4 pb = theMat * pbt;
+  vec4 pc = theMat * pct;
+  gColC = vCol[0];
+  gColE = vCol[1];
+
+  gBoundingBox = vec2 (-1,1);
+  gl_Position = pb;
+  gPos = pbt.xyz;
+  EmitVertex();
+  gBoundingBox = vec2 (1,1);
+  gl_Position = pa;
+  gPos = pat.xyz;
+  EmitVertex();
+  gBoundingBox = vec2 (-1,-1);
+  gl_Position = pc;
+  gPos = pct.xyz;
+  EmitVertex();
+  gBoundingBox = vec2 (1,-1);
+  gl_Position = pa + pc - pb;
+  gPos = pat.xyz + pct.xyz - pbt.xyz;
+  EmitVertex();
+
+  EndPrimitive();
+}