1 to 1 screen mapping (D3D8)
Author
i cant seem to see this in the documentation
how to setup the model + view matrices so i have an orthogonal viewpoint (ie non perspective) with a one to one mapping
ie (0,0) maps to the lowerleft + (windowwidth,winheight) maps to the upper right
ps without using the D3DX libraries
http://members.xoom.com/myBollux
Just set the projection matrix to something like
1
--------- 0 0 0
ScreenWidth
1
0 --------- 0 0
ScreenHeight
0 0 Q 1
0 0 -QZn 0
with Q = Zf/(Zf-Zn)
and
Zf = far clipping plane
Zn = near clipping plane
That is assuming you still want to do z-buffering.
Hmmm... that didn't show up too well.
It's
A 0 0 0
0 B 0 0
0 0 C 1
0 0 D 0
where
A = (1 / ScreenWidth)
B = (1 / ScreenHeight)
C = Q
D = -QZn
Edited by - ludemann8 on March 19, 2001 10:10:23 AM
1
--------- 0 0 0
ScreenWidth
1
0 --------- 0 0
ScreenHeight
0 0 Q 1
0 0 -QZn 0
with Q = Zf/(Zf-Zn)
and
Zf = far clipping plane
Zn = near clipping plane
That is assuming you still want to do z-buffering.
Hmmm... that didn't show up too well.
It's
A 0 0 0
0 B 0 0
0 0 C 1
0 0 D 0
where
A = (1 / ScreenWidth)
B = (1 / ScreenHeight)
C = Q
D = -QZn
Edited by - ludemann8 on March 19, 2001 10:10:23 AM
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
