I am getting really frustrated with my projection matrix. Almost anything I do results in a blank screen. I can draw an Iso3d view without perspective, rotate it around the vertical axis (z in my case) and everything, but I can simply not get perspective to work Here''s the code that I use to set up my matricies: // Initialize Matrices D3DXMatrixIdentity(&matWorld); D3DXMatrixIdentity(&matView); //init not really needed D3DXMatrixIdentity(&matProj); D3DXMatrixIdentity(&matTrans);//init not really needed D3DXMatrixIdentity(&matRot); //init not really needed D3DXMatrixIdentity(&matScale);//init not really needed D3DXMatrixTranslation(&matTrans,-MAPWIDTH/2.0,-MAPHEIGHT/2.0,0); D3DXMatrixRotationZ(&matRot,Angle); D3DXMatrixScaling(&matScale,TILEWIDTH,TILEHEIGHT,1); matView=matTrans*matRot*matScale; matProj._33=-1.0; matProj._43=1.0; matProj._34=1.0; matProj._11=2.0/(float)WINDOW_WIDTH; matProj._22=2.0/(float)WINDOW_HEIGHT; d3ddev->SetTransform(D3DTS_VIEW,&matWorld); d3ddev->SetTransform(D3DTS_VIEW,&matView); d3ddev->SetTransform(D3DTS_PROJECTION,&matProj); The matProj initialization works, but as soon as I tilt my view most of what I draw gets clipped, leaving me with only a thin horizontal strip of map on the screen. Does anybody have some suggestions, or perhaps a chunk of code that I could use to initialize my screen to an isometric-style format? I am looking forward more to coding game-related stuff, and not this initialization crap. Thanks for any and all help, Zen p.s. I don''t know if this relates to my problem, but all my textures get mirrored on the screen. Ie an F in a texture would come out flipped vertically. I could easily swap all of my vertex texture coordinates to fix this, but perhaps it is an indication of something else that''s wrong. It seems I am looking at my scene (currently just a flat surface) from underneath?

Using the d3dx functions causes my display to clip horribly, giving me perspective but only displaying a narrow horizontal band of tiles in the center of the display. The function I use now is basically just a top down view, and the isometrics view is achieved by the scaling matrix. I think I might be having some problems with z-clipping, but I can''t figure out how to correct that. There are several places where I specify min and max clipping planes: when setting the viewport, clearing the z-buffer, and in the d3dx perspective functions. Changing these has not changed anything on the display, I still get a narrow band rather than a full screens-worth,
Zen

Yay, it works :D

I trashed my entire matrix code and started over, and I didn''t have any problems. I think I hadn''t put in enough thought over where my axis pointed, so I was often displaying something, it was just scrolled off the edge of the screen. Thanks a bunch for the help CG,
Zen