glDrawArrays(3)

NAME

       glDrawArrays - render primitives from array data

C SPECIFICATION

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

       delim $$

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 sub-
       routine  calls. Instead of calling a GL procedure to pass each individ-
       ual 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 primitives.
       If  GL_VERTEX_ARRAY  is not enabled, no geometric primitives are gener-
       ated.

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

                                                              GLDRAWARRAYS(3G)