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gldrawelements(3g) [xfree86 man page]

GLDRAWELEMENTS(3G)														GLDRAWELEMENTS(3G)

NAME

       glDrawElements - render primitives from array data

C SPECIFICATION

       void glDrawElements( GLenum mode,
			    GLsizei count,
			    GLenum type,
			    const GLvoid *indices )

PARAMETERS

       mode	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.

       count	Specifies the number of elements to be rendered.

       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.

DESCRIPTION

       glDrawElements specifies multiple geometric primitives with very few subroutine calls. Instead of calling a GL function to pass each  indi-
       vidual  vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and so on and use
       them to construct a sequence of primitives with a single call to glDrawElements.

       When glDrawElements is called, it uses count sequential elements from an enabled array, starting at indices to construct a sequence of geo-
       metric  primitives.  mode specifies what kind of primitives are constructed, 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  glDrawElements  have	an  unspecified  value	after  glDrawElements  returns.  For  example,	if
       GL_COLOR_ARRAY is enabled, the value of the current color is undefined after glDrawElements executes. Attributes that aren't modified main-
       tain their previous values.

NOTES

       glDrawElements is available only if the GL version is 1.1 or greater.

       glDrawElements is included in display lists. If glDrawElements 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 val-
       ues 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 glDrawElements is executed between the execution of glBegin and the corresponding glEnd.

SEE ALSO

       glArrayElement(3G),    glColorPointer(3G),    glDrawArrays(3G),	  glDrawRangeElements(3G),    glEdgeFlagPointer(3G),	glGetPointerv(3G),
       glIndexPointer(3G), glInterleavedArrays(3G), glNormalPointer(3G), glTexCoordPointer(3G), glVertexPointer(3G)

																GLDRAWELEMENTS(3G)

Check Out this Related Man Page

GLDRAWARRAYS(3G)														  GLDRAWARRAYS(3G)

NAME

       glDrawArrays - render primitives from array data

C SPECIFICATION

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

PARAMETERS

       mode   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.

       first  Specifies the starting index in the enabled arrays.

       count  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 flag, or color, you can prespecify separate arrays of vertices, 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 primi-
       tives. If GL_VERTEX_ARRAY is not enabled, no geometric primitives are generated.

       Vertex attributes that are modified by glDrawArrays have an unspecified 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 val-
       ues 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, glColorPointer, glDrawElements, glDrawRangeElements, glEdgeFlagPointer, glGetPointerv, glIndexPointer, glInterleavedArrays,
       glNormalPointer, glTexCoordPointer, glVertexPointer

																  GLDRAWARRAYS(3G)
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