.: CTERRAN :.

The CTerran object is made to create height maps and draw it, It's a very useful object and using it is very easy. To use it, you have to load a grey-scale bitmap file that will be a topographical data to generate the height map, and then you will give a terrain and water texture. There is also a little and easy tide effect on the water to make it more realistic.

See the public part of the CTerran object :

void	SetSizeOfCase(float size);
void	SetLandLevel(float level);
int	GenTerran(char terran_file, char land_texture, char *water_texture);
void	DrawTerran();

SetSizeOfCase() is used to modify the magnifying value of the map. (default value : 4.0f).
SetLandLevel() serve to set the land level, just like its name tell it :) well, it's because of the topographical bitmap you'll give won't be always the same, sometimes you'll need to adjust the terrain height, like that, you'll also be able to make an island which sinks. (default value : 0.0f).
GenTerran() is probably the most significant function of the CTerran class, it'll generate the height map from the terran_file (a grey-scale 24bits bitmap file) and will load the land and water textures.
DrawTerran() will draw the height map into your OpenGL viewport.