Glnextvisibilitytesthp - HP b2600 Reference Manual

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glNextVisibilityTesthp

glNextVisibilityTesthp
glNextVisibilityTesthp - end the current visibility test and begin the next.
C Specification
void glNextVisibilityTesthp(void)
Parameters
None
Description
glNextVisibilityTesthp is used in conjunction with glVisibilityBufferhp to test the
visibility of primitives against the current contents of the depth buffer.
With glVisibilityBufferhp, the programmer specifies a boolean array in which to store
the results of the visibility tests; a call to glNextVisibilityTesthp finishes the current test
(eventually placing the results of the test in the current position of the array specified by
glVisiblityBufferhp), and beginning the next test, whose results will be placed in the
subsequent entry of the array.
Visibility Testing is enabled by a call to glEnable(VISIBILITY_TEST_hp). Making this
call to glEnable (if VISIBILITY_TEST_hp has not already been enabled) causes
Visibility Testing to begin, and sets the result destination to be the first entry in the
buffer specified by glVisibilityBufferhp.
Notes
None
Errors
GL_INVALID_OPERATION is generated if glNextVisibilityTesthp is called and
VISIBILITY_TEST_hp has not been enabled via glEnable().
GL_INVALID_OPERATION is generated if glVisibiliyBufferhp is called between a call
to glBegin and the corresponding call to glEnd.
Associated Gets
None
See Also
glVisibilityBufferhp
294
Chapter 12