1GLDRAWRANGEELEMENTS(3G) OpenGL Manual GLDRAWRANGEELEMENTS(3G)
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6 glDrawRangeElements - render primitives from array data
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9 void glDrawRangeElements(GLenum mode, GLuint start, GLuint end,
10 GLsizei count, GLenum type,
11 const GLvoid * indices);
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14 mode
15 Specifies what kind of primitives to render. Symbolic constants
16 GL_POINTS, GL_LINE_STRIP, GL_LINE_LOOP, GL_LINES,
17 GL_LINE_STRIP_ADJACENCY, GL_LINES_ADJACENCY, GL_TRIANGLE_STRIP,
18 GL_TRIANGLE_FAN, GL_TRIANGLES, GL_TRIANGLE_STRIP_ADJACENCY,
19 GL_TRIANGLES_ADJACENCY and GL_PATCHES are accepted.
20 start
22 Specifies the minimum array index contained in indices.
23 end
25 Specifies the maximum array index contained in indices.
26 count
28 Specifies the number of elements to be rendered.
29 type
31 Specifies the type of the values in indices. Must be one of
32 GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, or GL_UNSIGNED_INT.
33 indices
35 Specifies a pointer to the location where the indices are stored.
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38 glDrawRangeElements is a restricted form of glDrawElements(). mode,
39 start, end, and count match the corresponding arguments to
40 glDrawElements(), with the additional constraint that all values in the
41 arrays count must lie between start and end, inclusive.
42 Implementations denote recommended maximum amounts of vertex and index
44 data, which may be queried by calling glGet() with argument
45 GL_MAX_ELEMENTS_VERTICES and GL_MAX_ELEMENTS_INDICES. If end - start +
46 1 is greater than the value of GL_MAX_ELEMENTS_VERTICES, or if count is
47 greater than the value of GL_MAX_ELEMENTS_INDICES, then the call may
48 operate at reduced performance. There is no requirement that all
49 vertices in the range start end be referenced. However, the
50 implementation may partially process unused vertices, reducing
51 performance from what could be achieved with an optimal index set.
52 When glDrawRangeElements is called, it uses count sequential elements
54 from an enabled array, starting at start to construct a sequence of
55 geometric primitives. mode specifies what kind of primitives are
56 constructed, and how the array elements construct these primitives. If
57 more than one array is enabled, each is used.
58 Vertex attributes that are modified by glDrawRangeElements have an
60 unspecified value after glDrawRangeElements returns. Attributes that
61 aren't modified maintain their previous values.
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64 GL_LINE_STRIP_ADJACENCY, GL_LINES_ADJACENCY,
65 GL_TRIANGLE_STRIP_ADJACENCY and GL_TRIANGLES_ADJACENCY are available
66 only if the GL version is 3.2 or greater.
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69 It is an error for indices to lie outside the range start end, but
70 implementations may not check for this situation. Such indices cause
71 implementation-dependent behavior.
72 GL_INVALID_ENUM is generated if mode is not an accepted value.
74 GL_INVALID_VALUE is generated if count is negative.
76 GL_INVALID_VALUE is generated if end < start.
78 GL_INVALID_OPERATION is generated if a geometry shader is active and
80 mode is incompatible with the input primitive type of the geometry
81 shader in the currently installed program object.
82 GL_INVALID_OPERATION is generated if a non-zero buffer object name is
84 bound to an enabled array or the element array and the buffer object's
85 data store is currently mapped.
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88 glGet() with argument GL_MAX_ELEMENTS_VERTICES
89 glGet() with argument GL_MAX_ELEMENTS_INDICES
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93 glDrawArrays(), glDrawElements(), glDrawElementsBaseVertex()
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96 Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
97 under the SGI Free Software B License. For details, see
98 http://oss.sgi.com/projects/FreeB/.
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