fglDrawArrays(3G) OpenGL Reference fglDrawArrays(3G)NAME
fglDrawArrays - render primitives from array data
FORTRAN SPECIFICATION
SUBROUTINE fglDrawArrays( INTEGER*4 mode,
INTEGER*4 first,
INTEGER*4 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
fglDrawArrays specifies multiple geometric primitives with very few
subroutine calls. Instead of calling a GL procedure to pass each
individual 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
fglDrawArrays.
When fglDrawArrays 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 generated.
Vertex attributes that are modified by fglDrawArrays have an unspecified
value after fglDrawArrays returns. For example, if GL_COLOR_ARRAY is
enabled, the value of the current color is undefined after fglDrawArrays
executes. Attributes that aren't modified remain well defined.
NOTES
fglDrawArrays is available only if the GL version is 1.1 or greater.
fglDrawArrays is included in display lists. If fglDrawArrays 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.
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fglDrawArrays(3G) OpenGL Reference fglDrawArrays(3G)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 fglDrawArrays is executed between
the execution of fglBegin and the corresponding fglEnd.
SEE ALSO
fglArrayElement, fglColorPointer, fglDrawElements, fglDrawRangeElements,
fglEdgeFlagPointer, fglGetPointerv, fglIndexPointer,
fglInterleavedArrays, fglNormalPointer, fglTexCoordPointer,
fglVertexPointer
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