How is it possible to disable perspective in D3D?
Hello, I''m using D3D for my render engine, and in one of my little demo''s it is supposed to simulate a RTS with an overhead view. I want to render the 3D units over a 2D terrain - I have it all working but D3D is mucking it up! My units, as they move away from the center of the screen, appear to warp (its the perspective, I know that) - does anyone know how I can turn it off so that all things are flat? It''s hard to describe, so I''ll do some ASCII art (hehe)
What it does:
______
/ \ <- 3D object
++ <- camera
What I want:
-------- <- 3D object
++ <- camera
If you have ever played the game Total Annihilation (or the sequal) - that''s what I''m going for. They used their own render API, but I don''t want to do that...
Thanks for any help,
Ben Vanik
You can create an orthogonal projection matrix instead of the usual perspective projection matrix. My suggestion is to use D3DXMatrixOrthoLH() to do this.
D3DXMatrix Ortho;
D3DXMatrixOrthoLH(&Ortho, w, h, n, f);
SetTransform(D3DTRANSFORMSTATE_PROJECTION, (D3DMATRIX*)&Ortho);
D3DXMatrix Ortho;
D3DXMatrixOrthoLH(&Ortho, w, h, n, f);
SetTransform(D3DTRANSFORMSTATE_PROJECTION, (D3DMATRIX*)&Ortho);
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