GLAPI/glMultiDrawElementsBaseVertex: Difference between revisions
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== Function Definition == | == Function Definition == | ||
void '''glMultiDrawElementsBaseVertex'''(GLenum | void '''glMultiDrawElementsBaseVertex'''(GLenum {{param|mode}}, const GLsizei *{{param|count}}, GLenum {{param|type}}, const GLvoid **{{param|indices}}, GLsizei {{param|primcount}}, GLint *{{param|basevertex}}); | ||
; mode | ; mode | ||
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: Points to an array of the elements counts. | : Points to an array of the elements counts. | ||
; type | ; type | ||
: Specifies the type of the values in | : Specifies the type of the values in {{param|indices}}. Must be one of {{code|GL_UNSIGNED_BYTE}}, {{code|GL_UNSIGNED_SHORT}}, or {{code|GL_UNSIGNED_INT}}. | ||
; indices | ; indices | ||
: Specifies a pointer to the location where the indices are stored. | : Specifies a pointer to the location where the indices are stored. | ||
; primcount | ; primcount | ||
: Specifies the size of the | : Specifies the size of the {{param|count}} array. | ||
; basevertex | ; basevertex | ||
: Specifies a pointer to the location where the base vertices are stored. | : Specifies a pointer to the location where the base vertices are stored. | ||
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== Description == | == Description == | ||
'''glMultiDrawElementsBaseVertex''' behaves identically to | '''glMultiDrawElementsBaseVertex''' behaves identically to {{apifunc|glDrawElementsBaseVertex}}, except that {{param|primcount}} separate lists of elements are specifried instead. | ||
It has the same effect as: | It has the same effect as: | ||
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== Errors == | == Errors == | ||
{{code|GL_INVALID_ENUM}} is generated if | {{code|GL_INVALID_ENUM}} is generated if {{param|mode}} is not an accepted value. | ||
{{code|GL_INVALID_VALUE}} is generated if | {{code|GL_INVALID_VALUE}} is generated if {{param|primcount}} is negative. | ||
{{code|GL_INVALID_OPERATION}} is generated if a non-zero buffer object name is bound to an enabled array or the element array and the buffer object's data store is currently mapped. | {{code|GL_INVALID_OPERATION}} is generated if a non-zero buffer object name is bound to an enabled array or the element array and the buffer object's data store is currently mapped. | ||
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== See Also == | == See Also == | ||
{{apifunc|glMultiDrawElements}}, {{apifunc|glDrawElementsBaseVertex}}, {{apifunc|glDrawArrays}}, {{apifunc|glVertexAttribPointer}} | |||
== Copyright == | == Copyright == | ||
Revision as of 01:23, 29 April 2012
| Core in version | 4.6 | |
|---|---|---|
| Core since version | 3.2 | |
| Core ARB extension | ARB_draw_elements_base_vertex | |
glMultiDrawElementsBaseVertex: render multiple sets of primitives by specifying indices of array data elements and an index to apply to each index
Function Definition
void glMultiDrawElementsBaseVertex(GLenum mode, const GLsizei *count, GLenum type, const GLvoid **indices, GLsizei primcount, GLint *basevertex);
- 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.
- count
- Points to an array of the elements counts.
- type
- Specifies the type of the values in indices. Must be one of GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, or GL_UNSIGNED_INT.
- indices
- Specifies a pointer to the location where the indices are stored.
- primcount
- Specifies the size of the count array.
- basevertex
- Specifies a pointer to the location where the base vertices are stored.
Description
glMultiDrawElementsBaseVertex behaves identically to glDrawElementsBaseVertex, except that primcount separate lists of elements are specifried instead.
It has the same effect as:
for (int i = 0; i < ; i++)
if ([i] > 0)
glDrawElementsBaseVertex(,
[i],
,
,
);
Notes
glMultiDrawElementsBaseVertex is available only if the GL version is 3.1 or greater.
GL_LINE_STRIP_ADJACENCY, GL_LINES_ADJACENCY, GL_TRIANGLE_STRIP_ADJACENCY and GL_TRIANGLES_ADJACENCY are available only if the GL version is 3.2 or greater.
Errors
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_VALUE is generated if primcount is negative.
GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to an enabled array or the element array and the buffer object's data store is currently mapped.
See Also
glMultiDrawElements, glDrawElementsBaseVertex, glDrawArrays, glVertexAttribPointer
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/.