render primitives from array data
Signature
Parameters
Description
glDrawArrays
specifies multiple geometric primitives
with very few subroutine calls. Instead of calling a GL procedure
to pass each individual vertex, normal, texture coordinate, edge
flag, or color, you can prespecify
separate arrays of vertices, normals, and colors and use them to
construct a sequence of primitives with a single
call to
glDrawArrays
.
When
glDrawArrays
is called, it uses
count
sequential elements from each
enabled array to construct a sequence of geometric primitives,
beginning with element
first
.
mode
specifies what kind of
primitives are constructed and how the array elements
construct those primitives.
Vertex attributes that are modified by
glDrawArrays
have an
unspecified value after
glDrawArrays
returns. Attributes that aren't
modified remain well defined.
Notes
GL_LINE_STRIP_ADJACENCY
,
GL_LINES_ADJACENCY
,
GL_TRIANGLE_STRIP_ADJACENCY
and
GL_TRIANGLES_ADJACENCY
are available only if the GL version is 3.2 or greater.
Errors
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 non-zero buffer object name is bound to an
enabled array and the buffer object's data store is currently mapped.
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.
See Also
Copyright
Copyright
1991-2006
Silicon Graphics, Inc. This document is licensed under the SGI
Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/
.
Sample Code References
The following code samples have been found which appear to reference the functions described here. Take care that the code may be old, broken or not even use PyOpenGL.
glDrawArrays