glVertexAttribDivisor

glVertexAttribDivisor: man4/glVertexAttribDivisor.xml

glVertexAttribDivisor modifies the rate at which generic vertex attributes advance when rendering multiple instances of primitives in a single draw call. If divisor is zero, the attribute at slot index advances once per vertex. If divisor is non-zero, the attribute advances once per divisor instances of the set(s) of vertices being rendered. An attribute is referred to as instanced if its GL_VERTEX_ATTRIB_ARRAY_DIVISOR value is non-zero. index must be less than the value of GL_MAX_VERTEX_ATTRIBS.

glVertexAttribDivisor is available only if the GL version is 3.3 or higher.