Height Map from Mesh

General and Gameplay Programming Programming

4 comments, last by kosmon_x 18 years, 8 months ago

122

Author

August 25, 2005 09:30 AM

Hi Is there a way to generate a height map from a mesh for a terrain?

313

August 25, 2005 03:00 PM

There is a way...one solution would be to find what height the terrain/mesh is at a certain point, then simply output this to a file.

Adventures of a Pro & Hobby Games Programmer - http://neilo-gd.blogspot.com/Twitter - http://twitter.com/neilogd

139

August 25, 2005 04:47 PM

Just render an orto-view of the mesh from above and save the depthbuffer to an image-file. There is your heightmap!!

/Mike

122

Author

August 26, 2005 12:24 AM

IS it possible to read the depth buffer in openGL?

205

August 26, 2005 12:50 AM

I haven't tried it, but it could work like this (after switching to top view ortho mode)

float pixels[<screenwidth>][<screenheight>];glReadPixels(0,0,<screenwidth>,<screenheight>,GL_DEPTH_COMPONENT,GL_FLOAT,&pixels);

If that works, it would be enough information to build up a grayscale image file.

Greets

Chris

205

August 26, 2005 01:46 AM

double post

Reticulating splines