Name

glDrawArrays - render	primitives from	array data

Python Specification

glDrawArrays
	glDrawArrays(mode, first, count) -> None

C Specification

void glDrawArrays( GLenum mode,
                   GLint first,
                   GLsizei count )

Parameters

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, GL_TRIANGLES,	GL_QUAD_STRIP,
       GL_QUADS, and GL_POLYGON are accepted.

first	 Specifies the starting	index in the enabled arrays.

count	 Specifies the number of indices to be rendered.

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
vertexes, 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. If
GL_VERTEX_ARRAY is not enabled, no geometric primitives are
generated.

Vertex attributes that are modified by glDrawArrays have an
unspecified value after glDrawArrays returns.	For example,
if GL_COLOR_ARRAY is enabled,	the value of the current color
is undefined after glDrawArrays executes. Attributes that
aren't modified remain well defined.

Notes

glDrawArrays is available only if the	GL version is 1.1 or
greater.

glDrawArrays is included in display lists. If	glDrawArrays
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.

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 glDrawArrays is
executed between the execution of glBegin and	the
corresponding	glEnd.

See Also

glArrayElement, glColorPointer, glDrawElements,
glEdgeFlagPointer,
glGetPointerv, glIndexPointer, glInterleavedArrays,
glNormalPointer,
glTexCoordPointer, glVertexPointer

:: Documentation :: References :: GL ::
:: Index (n/a) ::