glDrawElements — render primitives from array data
void fsfuncglDrawElements( | GLenum mode, |
| GLsizei count, | |
| GLenum type, | |
const GLvoid * indices); |
mode
Specifies what kind of primitives to render.
Symbolic constants
GL_POINTS,
GL_LINE_STRIP,
GL_LINE_LOOP,
GL_LINES,
GL_TRIANGLE_STRIP,
GL_TRIANGLE_FAN, and
GL_TRIANGLES are accepted.
count
Specifies the number of elements to be rendered.
type
Specifies the type of the values in
indices. Must be either
GL_UNSIGNED_BYTE or
GL_UNSIGNED_SHORT.
indices
Specifies a pointer to the location where the indices are stored.
glDrawElements
specifies multiple geometric primitives with very few
subroutine calls. You can prespecify separate arrays of
vertices, normals, colors, and texture coordinates and use them
to construct a sequence of primitives with a single call to
glDrawElements.
When glDrawElements is called, it uses
count sequential indices from
indices
to lookup elements in enabled arrays to construct a sequence of
geometric primitives.
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 constructed.
Vertex attributes that are modified by
glDrawElements have an unspecified value after
glDrawElements
returns. For example, if GL_COLOR_ARRAY
is enabled, the value of the current color is undefined after
glDrawElements
executes. Attributes that aren't modified maintain their
previous values.
GL_INVALID_ENUM is generated if
mode is not an accepted value.
GL_INVALID_ENUM is generated if
type is not an accepted value.
GL_INVALID_VALUE is generated if
count is negative.
glClientActiveTexture, glColorPointer, glDrawArrays, glNormalPointer, glTexCoordPointer, glVertexPointer
Copyright © 2003-2004 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.