Gem 206d71791bc3642e8c5391a4c59c30ba7411fab8 osx/i386

built 'master:206d71791bc3642e8c5391a4c59c30ba7411fab8' for osx/i386

1 files changed, 51 insertions, 0 deletions

diff --git a/Gem/examples/10.glsl/tri2fan.geom b/Gem/examples/10.glsl/tri2fan.geom
new file mode 100644
index 0000000..45961e2
--- /dev/null
+++ b/Gem/examples/10.glsl/tri2fan.geom
@@ -0,0 +1,51 @@
+// Cyrille Henry 2010
+
+#version 120 
+#extension GL_EXT_geometry_shader4 : enable
+
+void main(void)
+{
+	
+	int i; //increment variable
+	vec4 pos1,pos2, pos3, pos4, pos5; // tmp
+	vec3 high;
+
+	for(i=0; i< gl_VerticesIn; i += 3){ // for all triangles
+		pos1 = gl_PositionIn[i];
+		pos2 = gl_PositionIn[i+1];
+		pos3 = gl_PositionIn[i+2];
+		pos4 = (pos1 + pos2 + pos3) / 3.; // center of the triangle
+
+		high = 10.*cross(pos2.xyz-pos1.xyz,pos3.xyz-pos2.xyz); 
+			// hight and orientation of the piramide
+
+		high = normalize(high);
+		high *= length(pos2-pos1);
+		pos5 = pos4 ;
+        pos5.xyz += high;
+
+		gl_Position = gl_ModelViewProjectionMatrix * pos1;
+		EmitVertex();
+		gl_Position = gl_ModelViewProjectionMatrix * pos4;
+		EmitVertex();
+		gl_Position = gl_ModelViewProjectionMatrix * pos5;
+		EmitVertex();
+		gl_Position = gl_ModelViewProjectionMatrix * pos2;
+		EmitVertex();
+		gl_Position = gl_ModelViewProjectionMatrix * pos4;
+		EmitVertex();
+		gl_Position = gl_ModelViewProjectionMatrix * pos5;
+		EmitVertex();
+		gl_Position = gl_ModelViewProjectionMatrix * pos3;
+		EmitVertex();
+		gl_Position = gl_ModelViewProjectionMatrix * pos4;
+		EmitVertex();
+		gl_Position = gl_ModelViewProjectionMatrix * pos5;
+		EmitVertex();
+
+		EndPrimitive();	
+			// new primitive
+	}
+
+}
+