glDrawArrays man page on DigitalUNIX

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glDrawArrays(3G)					      glDrawArrays(3G)

NAME
       glDrawArrays - render primitives from array data

SYNOPSIS
       void glDrawArrays(
	       GLenum mode,
	       GLint first,
	       GLsizei count );

PARAMETERS
       Specifies  what	kind  of  primitives  to  render.  Symbolic  constants
       GL_POINTS, GL_LINE_STRIP,  GL_LINE_LOOP,	 GL_LINES,  GL_TRIANGLE_STRIP,
       GL_TRIANGLE_FAN,	 GL_TRIANGLES, GL_QUAD_STRIP, GL_QUADS, and GL_POLYGON
       are accepted.  Specifies the starting  index  in	 the  enabled  arrays.
       Specifies the number of indices to be rendered.

DESCRIPTION
       glDrawArrays()  specifies  multiple  geometric primitives with very few
       subroutine calls. Instead of calling a GL procedure to pass each	 indi‐
       vidual  vertex,	normal, texture coordinate, edge option, or color, you
       can prespecify separate arrays of vertexes, normals, and colors and use
       them  to	 construct  a  sequence	 of  primitives	 with a single call to
       glDrawArrays().

       When glDrawArrays() is called, it uses count sequential	elements  from
       each  enabled  array  to	 construct a sequence of geometric primitives,
       beginning with element first.  mode specifies what kind	of  primitives
       are constructed, and how the array elements construct those primitives.
       If GL_VERTEX_ARRAY is not enabled, no geometric primitives  are	gener‐
       ated.

       Vertex  attributes that are modified by glDrawArrays() have an unspeci‐
       fied   value   after   glDrawArrays()   returns.	   For	 example,   if
       GL_COLOR_ARRAY  is enabled, the value of the current color is undefined
       after glDrawArrays() executes.  Attributes that aren't modified	remain
       well defined.

NOTES
       glDrawArrays() is available only if the GL version is 1.1 or greater.

       glDrawArrays()  is  included  in	 display  lists.  If glDrawArrays() 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.

ERRORS
       GL_INVALID_ENUM is generated if mode is not an accepted value.

       GL_INVALID_VALUE is generated if count is negative.

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

SEE ALSO
       glArrayElement(3),	  glColorPointer(3),	    glDrawElements(3),
       glDrawRangeElements(3), glEdgeFlagPointer(3), glGetPointerv(3),	glInd‐
       exPointer(3),  glInterleavedArrays(3),  glNormalPointer(3), glTexCoord‐
       Pointer(3), glVertexPointer

							      glDrawArrays(3G)
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