glActiveTexture — select active texture unit
void glActiveTexture( | GLenum texture); |
texture Specifies which texture unit to make active. The number of texture units is implementation-dependent, but must be at least 32. texture must be one of GL_TEXTUREi, where i ranges from zero to the value of GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS minus one. The initial value is GL_TEXTURE0.
glActiveTexture selects which texture unit subsequent texture state calls will affect. The number of texture units an implementation supports is implementation-dependent, but must be at least 32.
GL_INVALID_ENUM is generated if texture is not one of GL_TEXTUREi, where i ranges from zero to the value of GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS minus one.
glGet with argument GL_ACTIVE_TEXTURE, or GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS.
open.gl - Textures Objects and Parameters
opengl-tutorial.org - Tutorial 13 : Normal Mapping
| OpenGL ES API Version | |||
|---|---|---|---|
| Function Name | 2.0 | 3.0 | 3.1 |
| glActiveTexture | ✔ | ✔ | ✔ |
glGenTextures, glBindTexture, glCompressedTexImage2D, glCompressedTexImage3D, glCompressedTexSubImage2D, glCompressedTexSubImage3D, glCopyTexImage2D, glCopyTexSubImage2D, glCopyTexSubImage3D, glDeleteTextures glIsTexture, glTexImage2D, glTexImage3D, glTexSubImage2D, glTexSubImage3D, glTexParameter,
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