Defines a list of normal arrays.
OpenGL C bindings library: libGL.a
void glNormalPointerListIBM(GLenum type,
GLint stride,
const GLvoid **pointer,
GLint ptrstride)
The glNormalPointerListIBM subroutine specifies the location and data format of a list of arrays of normal components to use when rendering. The type parameter specifies the data type of each normal component. The stride parameter gives the byte stride from one normal to the next allowing vertices 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). The ptrstride parameter specifies the byte stride from one pointer to the next in the pointer array.
When a normal array is specified, type, stride, pointer and ptrstride are saved as client side state.
A stride value of 0 does not specify a "tightly packed" array as it does in glNormalPointer. Instead, it causes the first array element of each array to be used for each vertex. Also, a negative value can be used for stride, which allows the user to move through each array in reverse order.
To enable and disable the normal arrays, call glEnableClientState and glDisableClientState with the argument GL_NORMAL_ARRAY. The normal array is initially disabled. When enabled, the normal arrays are used when glMultiDrawArraysEXT, glMultiDrawElementsEXT, glMultiModeDrawArraysIBM, glMultiModeDrawElementsIBM, glDrawArrays, glDrawElements or glArrayElement is called. The last three calls in this list will only use the first array (the one pointed at by pointer[0]). See the descriptions of these routines for more information on their use.
The glNormalPointerListIBM subroutine is available only if the GL_IBM_vertex_array_lists extension is supported.
Execution of glNormalPointerListIBM is not allowed between glBegin and the corresponding glEnd, but an error may or may not be generated. If an error is not generated, the operation is undefined.
The glNormalPointerListIBM subroutine is typically implemented on the client side.
Since the normal array parameters are client side state, they are not saved or restored by glPushAttrib and glPopAttrib. Use glPushClientAttrib and glPopClientAttrib instead.
When a glNormalPointerListIBM call is encountered while compiling a display list, the information it contains does NOT contribute to the display list, but is used to update the immediate context instead.
The glNormalPointer call and the glNormalPointerListIBM call share the same state variables. A glNormalPointer call will reset the normal list state to indicate that there is only one normal list, so that any and all lists specified by a previous glNormalPointerListIBM call will be lost, not just the first list that it specified.
GL_INVALID_ENUM is generated if type is not an accepted value.
glIsEnabled with argument GL_NORMAL_ARRAY
glGetPointerv with argument GL_NORMAL_ARRAY_LIST_IBM
glGet with argument GL_NORMAL_ARRAY_LIST_STRIDE_IBM
glGet with argument GL_NORMAL_ARRAY_STRIDE
glGet with argument GL_NORMAL_ARRAY_TYPE
The glArrayElement subroutine, glDrawArrays subroutine, glDrawElements subroutine, glEdgeFlagPointer subroutine, glEnable subroutine, glGetPointerv subroutine, glIndexPointer subroutine, glInterleavedArrays subroutine, glMultiDrawArraysEXT subroutine, glMultiDrawElementsEXT subroutine, glMultiModeDrawArraysIBM subroutine, glMultiModeDrawElementsIBM subroutine, glNormalPointer subroutine, glPopClientAttrib subroutine, glPushClientAttrib subroutine, glTexCoordPointer subroutine, glVertexPointer subroutine.