Function LoadHeightMapFromFile

src/celengine/texture.cpp:1068–1086

Load a height map texture from a file and convert it to a normal map.

// Load a height map texture from a file and convert it to a normal map.
Texture* LoadHeightMapFromFile(const string& filename,
                               float height,
                               Texture::AddressMode addressMode)
{
    Image* img = LoadImageFromFile(filename);
    if (img == NULL)
        return NULL;
    Image* normalMap = img->computeNormalMap(height,
                                             addressMode == Texture::Wrap);
    delete img;
    if (normalMap == NULL)
        return NULL;

    Texture* tex = CreateTextureFromImage(*normalMap, addressMode,
                                          Texture::DefaultMipMaps);
    delete normalMap;

    return tex;
}