Renders multiple primitives from array data.
OpenGL C bindings library: libGL.a
void glMultiDrawElementsEXT(GLenum mode,
GLsizei *count,
GLenum type,
const GLvoid **indices,
GLsizei primcount)
The glMultiDrawElementsEXT subroutine lets you specify multiple geometric primitives with very few subroutine calls. Instead of calling a GL function to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertexes, normals, and so on and use them to construct a sequence of primitives with a single call to glMultiDrawElementsEXT.
When glMultiDrawElementsEXT is called, it uses count sequential elements from indices to construct a sequence of geometric primitives. GLenum mode specifies what kind of primitives are constructed and how the array elements construct these primitives. If GL_VERTEX_ARRAY is not enabled, no geometric primitives are generated.
Vertex attributes that are modified by glMultiDrawElementsEXT have an unspecified value after glMultiDrawElementsEXT returns. For example, if GL_COLOR_ARRAY is enabled, the value of the current color is undefined after glMultiDrawElementsEXT executes. Attributes that are not modified remain well defined.
The glMultiDrawElementsEXT subroutine is included in display lists. If glMultiDrawElementsEXT is entered into a display list, the necessary array data (determined by the array pointers and enables) is also entered into the display list. Because the array pointers and enables are client side state, their values affect display lists when the lists are created, not when the lists are executed.
glMultiDrawElementsEXT is part of the _extname(EXT_multi_draw_arrays) extension, not part of the core GL command set. If _extstring(EXT_multi_draw_arrays) is included in the string returned by glGetString, when called with argument GL_EXTENSIONS, extension _extname(EXT_multi_draw_arrays) is supported.
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_VALUE is generated if count is negative.
GL_INVALID_OPERATION is generated if glMultiDrawElementsEXT is executed between the execution of glBegin and the corresponding glEnd.
glGetTexImage, glIsEnabled with argument GL_TEXTURE_1D.
The glArrayElement subroutine, glColorPointer subroutine, glMultiDrawArraysEXT subroutine, glEdgeFlagPointer subroutine, glGetPointerv subroutine, glIndexPointer subroutine, glNormalPointer subroutine, glTexCoordPointer subroutine, glVertexPointer subroutine.