glDrawRangeElements man page on DigitalUNIX

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glDrawRangeElements(3G)				       glDrawRangeElements(3G)

       glDrawRangeElements - render primitives from array data

       void glDrawRangeElements(
	       GLenum mode,
	       GLuint start,
	       GLuint end,
	       GLsizei count,
	       GLenum type,
	       const GLvoid *indices );

       Specifies  what	kind  of  primitives  to  render.  Symbolic  constants
       are accepted.  Specifies the minimum array index contained in  indices.
       Specifies  the maximum array index contained in indices.	 Specifies the
       number of elements to be rendered.  Specifies the type of the values in
       count.	Must   be   one	 of  GL_UNSIGNED_BYTE,	GL_UNSIGNED_SHORT,  or
       GL_UNSIGNED_INT.	 Specifies a pointer to the location where the indices
       are stored.

       glDrawRangeElements()  is a restricted form of glDrawElements().	 mode,
       start, end, and count match the corresponding arguments	to  glDrawEle‐
       ments(),	 with  the additional constraint that all values in the arrays
       count must lie between start and end, inclusive.

       Implementations denote recommended maximum amounts of vertex and	 index
       data, which may be queried by calling glGet() with argument GL_MAX_ELE‐
       MENTS_VERTICES and GL_MAX_ELEMENTS_INDICES.  If "end" - "start" + 1  is
       greater	than  the  value  of  GL_MAX_ELEMENTS_VERTICES, or if count is
       greater than the value of GL_MAX_ELEMENTS_INDICES, then	the  call  may
       operate	at reduced performance.	 There is no requirement that all ver‐
       tices in the range [start, end] be referenced.  However, the  implemen‐
       tation may partially process unused vertices, reducing performance from
       what could be achieved with an optimal index set.

       When glDrawRangeElements() is called, it uses start sequential elements
       from  an	 enabled  array,  starting at count to construct a sequence of
       geometric primitives.  mode specifies what kind of primitives are  con‐
       structed,  and  how  the	 array elements construct these primitives. If
       more than one array is enabled, each is used. If GL_VERTEX_ARRAY is not
       enabled, no geometric primitives are constructed.

       Vertex  attributes  that	 are modified by glDrawRangeElements() have an
       unspecified value after glDrawRangeElements() returns. For example,  if
       GL_COLOR_ARRAY  is enabled, the value of the current color is undefined
       after glDrawRangeElements() executes. Attributes that  aren't  modified
       maintain their previous values.

       glDrawRangeElements()  is  available  only  if the GL version is 1.2 or

       glDrawRangeElements() is included in display lists.  If glDrawRangeEle‐
       ments()	is  entered  into  a  display  list,  the necessary array data
       (determined by the array pointers and enables) is also entered into the
       display	list.  Because	the array pointers and enables are client-side
       state, their values affect display lists when the  lists	 are  created,
       not when the lists are executed.

       It  is  an error for indices to lie outside the range [start, end], but
       implementations may not check for this situation.  Such	indices	 cause
       implementation-dependent behavior.

       GL_INVALID_ENUM is generated if mode is not an accepted value.

       GL_INVALID_VALUE is generated if count is negative.

       GL_INVALID_VALUE is generated if end < start.

       GL_INVALID_OPERATION  is generated if glDrawRangeElements() is executed
       between the execution of glBegin() and the corresponding glEnd().

       glGet() with argument GL_MAX_ELEMENTS_VERTICES
       glGet() with argument GL_MAX_ELEMENTS_INDICES

       glArrayElement(3),   glColorPointer(3),	 glDrawArrays(3),   glDrawEle‐
       ments(3),  glEdgeFlagPointer(3),	 glGetPointerv(3),  glIndexPointer(3),
       glInterleavedArrays(3),	  glNormalPointer(3),	 glTexCoordPointer(3),


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