Method GL.glIndexPointer()

Method glIndexPointer

void glIndexPointer(int type, int stride, System.Memory pointer)

Description

glIndexPointer specifies the location and data format of an array of color indexes to use when rendering. type specifies the data type of each color index and stride gives the byte stride from one color index to the next allowing vertexes and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see glInterleavedArrays.)

type, stride, and pointer are saved as client-side state.

The color index array is initially disabled. To enable and disable the array, call glEnableClientState and glDisableClientState with the argument GL_INDEX_ARRAY. If enabled, the color index array is used when glDrawArrays, glDrawElements or glArrayElement is called.

Use glDrawArrays to construct a sequence of primitives (all of the same type) from prespecified vertex and vertex attribute arrays. Use glArrayElement to specify primitives by indexing vertexes and vertex attributes and glDrawElements to construct a sequence of primitives by indexing vertexes and vertex attributes.

Parameter type

Specifies the data type of each color index in the array. Symbolic constants GL_UNSIGNED_BYTE, GL_SHORT, GL_INT, GL_FLOAT, and GL_DOUBLE are accepted.

Parameter stride

Specifies the byte offset between consecutive color indexes. If stride is 0 (the initial value), the color indexes are understood to be tightly packed in the array.

Parameter pointer

Specifies a pointer to the first index in the array.

Throws

GL_INVALID_ENUM is generated if type is not an accepted value.

GL_INVALID_VALUE is generated if stride is negative.