Method GL.glVertexPointer()

Method glVertexPointer

void glVertexPointer(int size, int type, int stride, System.Memory pointer)

Description

glVertexPointer specifies the location and data format of an array of vertex coordinates to use when rendering. size specifies the number of coordinates per vertex and type the data type of the coordinates. stride specifies the byte stride from one vertex 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.) When a vertex array is specified, size, type, stride, and pointer are saved as client-side state.

To enable and disable the vertex array, call glEnableClientState and .br glDisableClientState with the argument GL_VERTEX_ARRAY. If enabled, the vertex 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 size

Specifies the number of coordinates per vertex; must be 2, 3, or 4. The initial value is 4.

Parameter type

Specifies the data type of each coordinate in the array. Symbolic constants GL_SHORT, GL_INT, GL_FLOAT, and GL_DOUBLE are accepted. The initial value is GL_FLOAT.

Parameter stride

Specifies the byte offset between consecutive vertexes. If stride is 0, the vertexes are understood to be tightly packed in the array. The initial value

is 0.

Parameter pointer

Specifies a pointer to the first coordinate of the first vertex in the array.

Throws

GL_INVALID_VALUE is generated if size is not 2, 3, or 4.

GL_INVALID_ENUM is generated if type is is not an accepted value.

GL_INVALID_VALUE is generated if stride is negative.