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 +1,37 @@
+#version 430 core
+layout (points) in;
+layout (triangle_strip, max_vertices = 4) out;
+in vec4 vColor [];
+in vec4 vparams [];
+out vec4 gColor;
+out float gRadIn;
+out vec2 angles;
+out vec2 dist;
+
+uniform mat4 worldMat;
+
+void main()
+{
+  angles = vparams[0].xy;
+  vec4 cenPos = gl_in[0].gl_Position;
+  gColor = vColor[0];
+  float width = vparams[0].w ;
+  float rad = vparams[0].z + width;
+  gRadIn  = 1 - width * 2 / rad;
+  // I am not currently sure why the multiplicand is 4 and not 2
+
+  gl_Position = worldMat * vec4 (cenPos.x + rad, cenPos.y + rad, cenPos.z , 1);
+  dist = vec2 (1,1);
+  EmitVertex();
+  gl_Position = worldMat * vec4 (cenPos.x - rad, cenPos.y + rad, cenPos.z , 1);
+  dist = vec2 (-1,1);
+  EmitVertex();
+  gl_Position = worldMat * vec4 (cenPos.x + rad, cenPos.y - rad, cenPos.z , 1);
+  dist = vec2 (1,-1);
+  EmitVertex();
+  gl_Position = worldMat * vec4 (cenPos.x - rad, cenPos.y - rad, cenPos.z , 1);
+  dist = vec2 (-1,-1);
+  EmitVertex();
+
+  EndPrimitive();
+}