GeoMipTerrain and PNMImages

C++ coding using Panda3D
1

So I’m trying to explore terrain building a bit and not having too much luck.
I’ve created a .pgm file from the PNMImage.write function and have confirmed it looks like a legitimate height map in a simple image viewer. But then my calls to generate terrain from this PNMImage isn’t working. It just takes a while to generate and then creates a white, flat square.

Code below
(o, and the image is 2049x2049)

GeoMipTerrain *terrain = new GeoMipTerrain("terrain");
terrain->set_heightfield(Filename("file.pgm"));
terrain->set_color_map(Filename("file.pgm")); // not necessary, but i figure it would show up gray scale
terrain->set_auto_flatten(GeoMipTerrain::AFM_light);
terrain->get_root().reparent_to(window->get_render());
terrain->generate();

Basically the same thing from the documentation, just added flatten to speed it up.

2

In order for you to be able to see the height differences, you’ll want to apply a non-uniform scale in the Z axis, such as set_sz(100) on the root NodePath.

3

O man, that was on the document, completely missed that line.
Alright, so that is giving me height, but I’m still not seeing a ‘color map’ show up. It should be projecting an image onto this terrain, right?
Thanks!

4

You should for most purposes use a texture instead of a colour map if you want to texture the terrain.