Render primitives from array data.
||-||Specifies what kind of primitives to render. Symbolic constants |
||-||Specifies the number of elements to be rendered.|
||-||Specifies the type of the values in |
||-||Specifies a pointer to the location where the indices are stored.|
glDrawElements specifies 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 vertices, normals, and so on, and use them to construct a sequence of primitives with a single call to
glDrawElements is called, it uses
count sequential elements from an enabled array, starting at
indices to construct a sequence of geometric primitives.
mode specifies what kind of primitives are constructed and how the array elements construct these primitives. If more than one array is enabled, each is used.
Vertex attributes that are modified by
glDrawElements have an unspecified value after
glDrawElements returns. Attributes that aren't modified maintain their previous values.
GL_TRIANGLES_ADJACENCY are available only if the GL version is 3.2 or greater.
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 a geometry shader is active and
mode is incompatible with the input primitive type of the geometry shader in the currently installed program object.
GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to an enabled array or the element array and the buffer object's data store is currently mapped.
Copyright© 1991-2006 Silicon Graphics, Inc. Copyright© 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.