glActiveTexture¶

The glActiveTexture function is used in OpenGL to select an active texture unit. This function takes an integer argument $texture, which specifies which texture unit to make active. The number of texture units is implementation dependent, but must be at least 80. The parameter $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.

function glActiveTexture(int $texture) : void

Here is an example usage of glActiveTexture:

glActiveTexture(GL_TEXTURE0); // Make texture unit 0 active
glActiveTexture(GL_TEXTURE1); // Make texture unit 1 active

Note that you should always check the value of GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS to ensure that your program is compatible with the current OpenGL implementation.

arguments

int $texture Specifies which texture unit to make active. The number of texture units is implementation dependent, but must be at least 80. 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.

returns

void

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