Problem with Ortho2D mode
Hi
i try to render some simple polygons in 2D:
D3DXMatrixOrthoLH(&Ortho2D, WIDTH, HEIGHT, 0.0f, 1.0f);
D3DXMatrixIdentity(&Identity);
SetTransform(D3DTS_PROJECTION, &Ortho2D);
SetTransform(D3DTS_WORLD, &Identity);
SetTransform(D3DTS_VIEW, &Identity);
SetRenderState(D3DRS_ZENABLE, D3DZB_TRUE);
SetRenderState(D3DRS_LIGHTING, FALSE);
i render a simple triangle in the middle of the screen
dev->Clear( 0, NULL, D3DCLEAR_TARGET, 0x0000FF00, 1.0f, 0 );
dev->BeginScene();
dev->SetTexture( 0, NULL );
InVertex test[3];
test[0].x= 0.0f;
test[0].y=-10.0f;
test[0].z= 1.0f;
test[0].c=0xFFFFFFFF;
test[1].x= 10.0f;
test[1].y= 10.0f;
test[1].z= 1.0f;
test[1].c=0xFFFFFFFF;
test[2].x=-10.0f;
test[2].y= 10.0f;
test[2].z= 1.0f;
test[2].c=0xFFFFFFFF;
dev->SetVertexShader(T_INVERTEX);
dev->DrawPrimitiveUP(D3DPT_TRIANGLELIST, 1, test, sizeof(InVertex));
dev->EndScene();
This doesnt show anything just a green background.
But when i change the T_INVERTEX description to include rhw=1.0f it works fine and draws a white triangle at the right screen coordinates.
i guess i missed something stupid
Eibwen
[edited by - Eibwen on December 26, 2002 12:11:21 PM]
What I gathered based on your code...
You are specifing your vertices co-ordinates in a Counter Clock Wise (CCW) direction.
Try either to rearrange them ClockWise (CW) or change the culling render state to D3DCULL_CW or D3DCULL_NONE...
Having said that, I don't think that with the 'rhw' vertex format you saw anything as well - 'cause the order of the vertices was still backwards.
Maybe with transformed vertices culling isn't enforced....?
[edited by - NE1 on December 26, 2002 4:44:31 PM]
You are specifing your vertices co-ordinates in a Counter Clock Wise (CCW) direction.
Try either to rearrange them ClockWise (CW) or change the culling render state to D3DCULL_CW or D3DCULL_NONE...
Having said that, I don't think that with the 'rhw' vertex format you saw anything as well - 'cause the order of the vertices was still backwards.
Maybe with transformed vertices culling isn't enforced....?
[edited by - NE1 on December 26, 2002 4:44:31 PM]
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