2010 Khronos Group. glDrawTransformFeedback 3G glDrawArraysIndirect render primitives from array data, taking parameters from memory void glDrawArraysIndirect GLenum mode const void *indirect mode Specifies 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. indirect Specifies the address of a structure containing the draw parameters. glDrawArraysIndirect specifies multiple geometric primitives with very few subroutine calls. glDrawArraysIndirect behaves similarly to glDrawArraysInstanced, execpt that the parameters to glDrawArraysInstanced are stored in memory at the address given by indirect. The parameters addressed by indirect are packed into a structure that takes the form (in C): first, cmd->count, cmd->primCount);]]> If a buffer is bound to the GL_INDIRECT_BUFFER binding at the time of a call to glDrawArraysIndirect, indirect is interpreted as an offset, in basic machine units, into that buffer and the parameter data is read from the buffer rather than from client memory. In contrast to glDrawArraysInstanced, the first member of the parameter structure is unsigned, and out-of-range indices do not generate an error. The results of the operation are undefined if the reservedMustBeZero member of the parameter structure is non-zero. However, no error is generated in this case. Vertex attributes that are modified by glDrawArraysIndirect have an unspecified value after glDrawArraysIndirect returns. Attributes that aren't modified remain well defined. GL_INVALID_ENUM is generated if mode is not an accepted value. GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to an enabled array or to the GL_INDIRECT_BUFFER binding 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. GL_INVALID_OPERATION is generated if mode is GL_PATCHES and no tessellation control shader is active. glDrawArrays, glDrawArraysInstanced, glDrawElements, glDrawRangeElements, 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/.