1991-2006
Silicon Graphics, Inc.
glDrawArrays
3G
glDrawArrays
render primitives from array data
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, and
GL_TRIANGLES 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 attribute, you can use
glVertexAttribPointer
to 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.
To enable and disable a generic vertex attribute array, call
glEnableVertexAttribArray
and
glDisableVertexAttribArray.
Notes
If the current program object, as set by
glUseProgram,
is invalid, rendering results are undefined. However, no error is generated
for this case.
Errors
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_VALUE is generated if count is negative.
GL_INVALID_FRAMEBUFFER_OPERATION is generated if
the currently bound framebuffer is not framebuffer complete (i.e. the
return value from glCheckFramebufferStatus
is not GL_FRAMEBUFFER_COMPLETE).
See Also
glCheckFramebufferStatus,
glDisableVertexAttribArray,
glDrawElements,
glEnableVertexAttribArray,
glUseProgram,
glVertexAttribPointer
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/.