Интерактивная система просмотра системных руководств (man-ов)
glIndexPointer (3)
>> glIndexPointer (3) ( Разные man: Библиотечные вызовы )
NAME
glIndexPointer
- define an array of color indexes
C SPECIFICATION
void glIndexPointer(
GLenum type,
GLsizei stride,
const GLvoid *ptr )
delim $$
PARAMETERS
type
Specifies the data type of each color index in the array.
Symbolic constants
GL_UNSIGNED_BYTE,
GL_SHORT,
GL_INT,
GL_FLOAT,
and GL_DOUBLE
are accepted. The initial value is GL_FLOAT.
stride
Specifies the byte offset between consecutive color indexes.
If stride is 0 (the initial value), the color indexes are understood to
be tightly packed in the array.
The initial value is 0.
ptr
Specifies a pointer to the first index in the array.
The initial value is 0.
DESCRIPTION
glIndexPointer specifies the location and data of an array of color indexes
to use when rendering.
type specifies the data type of
each color index and stride gives the byte stride from one
color index to the next allowing vertices 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.)
type, stride, and ptr are saved as client-side
state.
The color index array is initially disabled. To enable and disable
the array, call glEnableClientState and
glDisableClientState with the argument GL_INDEX_ARRAY. If
enabled, the color index array is used when glDrawArrays,
glDrawElements or glArrayElement is called.
Use glDrawArrays to construct a sequence of primitives (all of
the same type) from prespecified vertex and vertex attribute arrays.
Use glArrayElement to specify primitives
by indexing vertices and vertex attributes and glDrawElements to
construct a sequence of primitives by indexing vertices and vertex attributes.
NOTES
glIndexPointer is available only if the GL version is 1.1 or greater.
The color index array is initially disabled, and it isn't accessed when
glArrayElement, glDrawElements, or glDrawArrays is called.
Execution of glIndexPointer is not allowed between
glBegin and the corresponding glEnd,
but an error may or may not be generated. If an error is not generated,
the operation is undefined.
glIndexPointer is typically implemented on the client side.
Since the color index array parameters are client-side state, they are
not saved or restored by glPushAttrib and glPopAttrib.
Use glPushClientAttrib and
glPopClientAttrib instead.
ERRORS
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_INDEX_ARRAY glGet with argument GL_INDEX_ARRAY_TYPE glGet with argument GL_INDEX_ARRAY_STRIDE glGetPointerv with argument GL_INDEX_ARRAY_POINTER
