Texture Unit

Tags

opengl

The location (as in shader-location) is where a textures can be found in a shader.

The default texture-unit is 0, meaning that you can reference a uniform texture at this location without assigning it first. For all other texture-units you must first enable them (eg. glActiveTexture(GL_TEXTURE0)) and then bind them glBindTexture(GL_TEXTURE_2D, texture).

OpenGL makes 16 texture units (0-15) available for our use.