How do I get return values from gl3 verbs like the
following for opengl?
glIsEnabled=: ' glIsEnabled > c i' & (15!:0)
glGetIntegerv=: ' glGetIntegerv > n i *i' & (15!:0)
glGetLightfv=: ' glGetLightfv > n i i *f' & (15!:0)
The following 3 excerpts show some of the attempts
and the errors I have received.
excerpt 1 *****************************************
glIsEnabled_jzopenglutil_ GL_BLEND_jzopenglutil_
There is no apparent error here, but it looks like
the returned value is empty (0$00, eg) which is not helpful
and should be either a 0 or a 1 according to my
expectations.
excerpt 2 *****************************************
glGetLightfv_jzopenglutil_ GL_LIGHT0_jzopenglutil_;GL_POSITION_jzopenglutil_
|domain error: glGetLightfv_jzopenglutil_
| glGetLightfv_jzopenglutil_
GL_LIGHT0_jzopenglutil_;GL_POSITION_jzopenglutil_
cder''
4 0
From the above cder and JforC I know "... (the
number of arguments did not match the number of
declarations)"
excerpt 3 *****************************************
abc =: 1
glGetLightfv_jzopenglutil_
GL_LIGHT0_jzopenglutil_;GL_POSITION_jzopenglutil_;abc
|domain error: glGetLightfv_jzopenglutil_
| glGetLightfv_jzopenglutil_
GL_LIGHT0_jzopenglutil_;GL_POSITION_jzopenglutil_;abc
cder''
6 2
From the above and similar trials I know that the
phony last argument does not match the needed return value.
(B=)
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