convert altmetry points into heightmap
Author
Hey guys!
In the system I am implemeting, I have to load a list of altimetry points. At first, I tried using Delaunay triangulation + tesselation. However tesselation is not uniform so I have faces of different size.
However, I would like to have a heightmap. So how smoothing at specified step?
Thanks for your help.
Here's a quick(and slightly crazy) solution: Render the mesh with orthographic projection, and use the y coordinate of the vertices to set the color. For example, if the maximum height is 100, you would do(in OpenGL):
glColor3f(vertex.y/100.0,vertex.y/100.0,vertex.y/100.0);
If you render that from the top and capture the image, you'll basically have the heightmap!
Of course, I imagine the proper method would be to cast a vertical ray from the specified point of the plane, find out which triangle it hits and where, and do an interpolation of the height values.
glColor3f(vertex.y/100.0,vertex.y/100.0,vertex.y/100.0);
If you render that from the top and capture the image, you'll basically have the heightmap!
Of course, I imagine the proper method would be to cast a vertical ray from the specified point of the plane, find out which triangle it hits and where, and do an interpolation of the height values.
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