GLuint model::loadTexture(string TextureName)
{
string filename = TextureName;
filename.append(".bmp");
BitMapFile *image[1];
image[0] = getBMPData(filename);
glGenTextures(1, &textureId); //Make room for our texture
glBindTexture(GL_TEXTURE_2D, textureId); //Tell OpenGL which texture to edit
//Map the image to the texture
glTexImage2D(GL_TEXTURE_2D,
0,
GL_RGB,
image[0]->width, image[0]->height,
0,
GL_RGB,
GL_UNSIGNED_BYTE,
image[0]->data); //The actual pixel data
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
void Mesh::TextureInit() {
glEnable(GL_TEXTURE_2D);
// Generate and load textures
glGenTextures(5, texture);
BitMapFile *image[5];
image[0] = getBMPData(args->heightmap_filename);
image[1] = getBMPData(args->normalmap_filename);
image[2] = getBMPData("stone.bmp");
image[3] = getBMPData("grass.bmp");
image[4] = getBMPData("snow.bmp");
// Set Texture 0 - Heightmap
glBindTexture(GL_TEXTURE_2D, texture[0]);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, image[0]->sizeX, image[0]->sizeY, 0,
GL_RGB, GL_UNSIGNED_BYTE, image[0]->data);
// Set Texture 1 - Normal map
glBindTexture(GL_TEXTURE_2D, texture[1]);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, image[1]->sizeX, image[1]->sizeY, 0,
GL_RGB, GL_UNSIGNED_BYTE, image[1]->data);
// Set Texture 2 - Stone
glBindTexture(GL_TEXTURE_2D, texture[2]);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, image[2]->sizeX, image[2]->sizeY, 0,
GL_RGB, GL_UNSIGNED_BYTE, image[2]->data);
// Set Texture 3 - Grass
glBindTexture(GL_TEXTURE_2D, texture[3]);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, image[3]->sizeX, image[3]->sizeY, 0,
GL_RGB, GL_UNSIGNED_BYTE, image[3]->data);
// Set Texture 4 - Snow
glBindTexture(GL_TEXTURE_2D, texture[4]);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, image[4]->sizeX, image[4]->sizeY, 0,
GL_RGB, GL_UNSIGNED_BYTE, image[4]->data);
glDisable(GL_TEXTURE_2D);
}
