World -> Screen
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How could I know where on screen my 3D primitive will be drawn? i.e. how to translate world coordinates into screen coordinates?
you don''t really need to know that.
for now where on you screen your 3D primitive will be drawn, just depends on your point of view.
you can otherwise draw pixels. use glRasterPos... with glDrawPixel.
otherwise normally, gluUnProject will give you an approximatively correct screen pos of a 3D point.
i hope this help
for now where on you screen your 3D primitive will be drawn, just depends on your point of view.
you can otherwise draw pixels. use glRasterPos... with glDrawPixel.
otherwise normally, gluUnProject will give you an approximatively correct screen pos of a 3D point.
i hope this help
>>approximatively correct<<
----------------- aye?
http://uk.geocities.com/sloppyturds/gotterdammerung.html
----------------- aye?
http://uk.geocities.com/sloppyturds/gotterdammerung.html
Use this formula:
x'' = p * x / z + screen Width/2
y'' = p * y / z + screen Height / 2
("p" is the fisheye effect. The smaller number the more fisheye effect you got. Try 256 and arround.)
x'' = p * x / z + screen Width/2
y'' = p * y / z + screen Height / 2
("p" is the fisheye effect. The smaller number the more fisheye effect you got. Try 256 and arround.)
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