First implementation of quadratic bezier curve shader

2021-03-12 15:25:07 +01:00
parent 6f1f817ed3
commit 0489a092bc
21 changed files with 372 additions and 37 deletions
@@ -0,0 +1,30 @@
+#version 430 core
+layout (points) in;
+layout (triangle_strip, max_vertices = 4) out;
+in vec4 vColor [];
+in float vRad [];
+uniform vec2 winSize;
+out vec4 gColor;
+out float gRad;
+out vec2 cenPosTrans;
+void main()
+{
+  vec3 cenPos = gl_in[0].gl_Position.xyz;
+  vec2 cenPosa = cenPos.xy + vec2 (1,1);
+  cenPosTrans = vec2 (cenPosa * winSize * 0.5);
+  gColor = vColor[0];
+  gRad = vRad[0];
+
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y + gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y + gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y - gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y - gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+
+
+  EndPrimitive();
+
+}