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D3D projection

Started by Renny Sep 10, 2000 at 8:21 AM 0 replies 300+ views

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Sep 10, 2000 at 8:21 AM

Im having trouble here gettin d3d to project properly. So far ive use a D3DTLVERTEX and given it x and y scrren coords and it renders a tri fine. As soon as i add a z component to the vertices, and use D3DLVERTEX, well, it doesnt render a thing. Im simply trying to render 1 triangle with persp. projection. Ive tried setting projection matrices, looked in the help files, spent a couple of hours TRYING to get one, single, annoying little triangle to render on my monitor, after d3d projects it for me.

I set my viwport to 0,0 to 640, 480, tri vertices at (0,10,5) (20,0,10) (20,20,0), but it wont render it (will render if i tell it it is reasy transformed, ie use TLVERTEX, but thats not what i want

) Any help would be appreciated, Thanks.

rtime

Sep 10, 2000 at 8:56 AM

you have to set the projection matrix and the view
matrix.. (i think)

and you should set the D3D-Culling Mode to CULL_NONE.
this helps you do find an error in your triangle-vertex-
order (one of my favorites

)
After you see the triangle on the screen, change CULL_NONE
to CULL_(C)CW (what you prefer)... if the triangle
disappears you have to change the order or the vertices
(like ABC => ACB)

hope this helps
Torsten

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