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GL
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Method GL.glDrawArrays()
- Method
glDrawArrays
void glDrawArrays(int mode, int first, int count) - Description
glDrawArrays 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 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 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.
- Parameter 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.
- Parameter first
Specifies the starting index in the enabled arrays.
- Parameter count
Specifies the number of indices to be rendered.
- Throws
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 .
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GL.glDisableClientState()