Geometry Shaders and Spheres

advanced
#1

Working with the examples, I can see how to use a mesh of points to create line strips via a geometry shader. I’m trying to do something similar with the points from a sphere, but render the faces and lines via a geometry shader. All of my experiments and forum searching have come up with nothing. Does anyone have some sample code that can do this?

Thanks!
Tim

#2

Have you checked following limitation of input and output GL primitive?

ofShader.h

// these are essential to call before linking the program with geometry shaders
void setGeometryInputType(GLenum type); // type: GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_EXT, GL_TRIANGLES, GL_TRIANGLES_ADJACENCY_EXT
void setGeometryOutputType(GLenum type); // type: GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP

And also check your GPU limitation.

void setGeometryOutputCount(int count);	// set number of output vertices
int getGeometryMaxOutputCount() const;		// returns maximum number of supported vertices
1 Like
#3

This worked perfectly, thank yoU!