KHR_texture_basisu

[daktor]

Hi all,

I see some code in assimp for KHR_texture_basisu, but I can't find where the ktx2 data is stored (want to access it so can transcribe it). The aiScene has materials, but no embedded textures.

Where is the ktx2 data?

Thanks!

[kimkulling]

You can find the embedded textures in the scene:

For instance:

void LoadGLTextures(const aiScene* scene, const string& pModelPath)
{
	// Check if scene has textures.
	if(scene->HasTextures())
	{
		textureIds = new GLuint[scene->mNumTextures];
		glGenTextures(scene->mNumTextures, textureIds);// generate GL-textures ID's
		// upload textures
		for(size_t ti = 0; ti < scene->mNumTextures; ti++)
		{
			glBindTexture(GL_TEXTURE_2D, textureIds[ti]);// Binding of texture name
			//
			//redefine standard texture values
			//
			// We will use linear interpolation for magnification filter
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
			// tiling mode
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, (scene->mTextures[ti]->achFormatHint[0] & 0x01) ? GL_REPEAT : GL_CLAMP);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, (scene->mTextures[ti]->achFormatHint[0] & 0x01) ? GL_REPEAT : GL_CLAMP);
			// Texture specification
			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, scene->mTextures[ti]->mWidth, scene->mTextures[ti]->mHeight, 0, GL_BGRA, GL_UNSIGNED_BYTE,
							scene->mTextures[ti]->pcData);
		}
	}
}

[kimkulling]

The scene has one attibute mTextures, which contains the texture resolution, its format and all the raw data to load. The attribute mNumTextures describes how much textures are available.