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GLDRAWELEMENTSINDIRE(3G) | [FIXME: manual] | GLDRAWELEMENTSINDIRE(3G) |
NAME¶
glDrawElementsIndirect - render indexed primitives from array data, taking parameters from memoryC SPECIFICATION¶
void
glDrawElementsIndirect(GLenum mode,
GLenum type,
const void *indirect);
PARAMETERS¶
modeSpecifies what kind of primitives to render.
Symbolic constants GL_POINTS, GL_LINE_STRIP,
GL_LINE_LOOP, GL_LINES, GL_LINE_STRIP_ADJACENCY,
GL_LINES_ADJACENCY, GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN,
GL_TRIANGLES, GL_TRIANGLE_STRIP_ADJACENCY,
GL_TRIANGLES_ADJACENCY, and GL_PATCHES are accepted.
type
Specifies the type of data in the buffer bound
to the GL_ELEMENT_ARRAY_BUFFER binding.
indirect
Specifies the address of a structure
containing the draw parameters.
DESCRIPTION¶
typedef struct { uint count; uint primCount; uint firstIndex; uint baseVertex; uint baseInstance; } DrawElementsIndirectCommand;
void glDrawElementsIndirect(GLenum mode, GLenum type, const void * indirect) { const DrawElementsIndirectCommand *cmd = (const DrawElementsIndirectCommand *)indirect; glDrawElementsInstancedBaseVertexBaseInstance(mode, cmd->count, type, cmd->firstIndex + size-of-type, cmd->primCount, cmd->baseVertex, cmd->baseInstance); }
NOTES¶
The baseInstance member of the DrawElementsIndirectCommand structure is defined only if the GL version is 4.2 or greater. For versions of the GL less than 4.2, this parameter is present but is reserved and should be set to zero. On earlier versions of the GL, behavior is undefined if it is non-zero.ERRORS¶
SEE ALSO¶
COPYRIGHT¶
Copyright © 2010 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/.05/30/2012 | [FIXME: source] |