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glColorPointer(3G)
NAME
glColorPointer - define an array of colors
SYNOPSIS
void glColorPointer(
GLint size,
GLenum type,
GLsizei stride,
const GLvoid *pointer );
PARAMETERS
size
Specifies the number of components per color. Must be 3 or 4. The
initial value is 4.
type
Specifies the data type of each color component in the array. Symbolic
constants GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT,
GL_INT, GL_UNSIGNED_INT, GL_FLOAT, and GL_DOUBLE are accepted. The
initial value is GL_FLOAT.
stride
Specifies the byte offset between consecutive colors. If stride is 0
(the initial value), the colors are understood to be tightly packed in
the array. The initial value is 0.
pointer
Specifies a pointer to the first component of the first color element
in the array.
DESCRIPTION
glColorPointer() specifies the location and data of an array of color
components to use when rendering. size specifies the number of components
per color, and must be 3 or 4. type specifies the data type of each color
component, and stride specifies the byte stride from one color to the next
allowing vertexes and attributes to be packed into a single array or stored
in separate arrays. (Single-array storage may be more efficient on some
implementations; see glInterleavedArrays.)
When a color array is specified, size, type, stride, and pointer are saved
as client-side state.
To enable and disable the color array, call glEnableClientState() and
glDisableClientState() with the argument GL_COLOR_ARRAY. If enabled, the
color array is used when glDrawArrays(), glDrawElements(),
glDrawRangeElements(), or glArrayElement() is called.
NOTES
glColorPointer() is available only if the GL version is 1.1 or greater.
The color array is initially disabled and isn't accessed when
glArrayElement(), glDrawArrays(), glDrawRangeElements(), or
glDrawElements() is called.
Execution of glColorPointer() is not allowed between the execution of
glBegin() and the corresponding execution of glEnd(), but an error may or
may not be generated. If no error is generated, the operation is undefined.
glColorPointer() is typically implemented on the client side.
Color array parameters are client-side state and are therefore not saved or
restored by glPushAttrib() and glPopAttrib(). Use glPushClientAttrib() and
glPopClientAttrib() instead.
ERRORS
GL_INVALID_VALUE is generated if size is not 3 or 4.
GL_INVALID_ENUM is generated if type is not an accepted value.
GL_INVALID_VALUE is generated if stride is negative.
ASSOCIATED GETS
glIsEnabled() with argument GL_COLOR_ARRAY
glGet() with argument GL_COLOR_ARRAY_SIZE
glGet() with argument GL_COLOR_ARRAY_TYPE
glGet() with argument GL_COLOR_ARRAY_STRIDE
glGetPointerv with argument GL_COLOR_ARRAY_POINTER
SEE ALSO
glArrayElement(3), glDrawArrays(3), glDrawElements(3),
glEdgeFlagPointer(3), glEnable(3), glGetPointerv(3), glIndexPointer(3),
glInterleavedArrays(3), glNormalPointer(3), glPopClientAttrib(3) ,
glPushClientAttrib(3) , glTexCoordPointer(3), glVertexPointer(3)
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Index for Section 3G |
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