Signature
glDrawArraysInstanced(
GLenum (
mode
)
,
GLint (
first
)
,
GLsizei (
count
)
,
GLsizei (
instancecount
)
)-> void
Parameters
Description
glDrawArraysInstanced
behaves identically to
glDrawArrays
except that
instancecount
instances of the range of elements are executed and the value of the internal counter
instanceID
advances for each iteration.
instanceID
is an internal 32-bit integer counter
that may be read by a vertex shader as
gl_InstanceID
.
glDrawArraysInstanced
has the same effect as:
if ( mode or count is invalid )
generate appropriate error
else {
for (int i = 0; i < instancecount ; i++) {
instanceID = i;
glDrawArrays(mode, first, count);
}
instanceID = 0;
}
Errors
GL_INVALID_ENUM
is generated if
mode
is not one of
the accepted values.
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 and the buffer object's data store is currently mapped.
Version Support
| glDrawArraysInstanced |
See Also
Copyright
Copyright
2010-2014 Khronos Group.
This material may be distributed subject to the terms and conditions set forth in
the Open Publication License, v 1.0, 8 June 1999.
http://opencontent.org/openpub/
.