OpenGL -> DirectX 9 Conversion

strahan · 2004-01-08T02:47:31

Help! I am trying to convert an OpenGL implementation into DirectX 9. I am getting screwed up results when converting the following triangle rendering code: OpenGL: glColor3f(1, 1, 1); // Output the LEFT VERTEX for the triangle glVertex3f((GLfloat) leftX,(GLfloat) leftZ,(GLfloat) leftY ); glColor3f(1, 1, 1); // Output the RIGHT VERTEX for the triangle glVertex3f((GLfloat) rightX, (GLfloat) rightZ, (GLfloat) rightY ); glColor3f(1, 1, 1); // Output the APEX VERTEX for the triangle glVertex3f((GLfloat) apexX,(GLfloat) apexZ,(GLfloat) apexY ); DirectX 9: CUSTOMVERTEX cvVertices[3]; cvVertices[0].colour = D3DCOLOR_XRGB(255, 255, 255); cvVertices[0].x = leftX; cvVertices[0].y = leftZ; cvVertices[0].z = leftY; cvVertices[1].colour = D3DCOLOR_XRGB(255, 255, 255); cvVertices[1].x = rightX; cvVertices[1].y = rightZ; cvVertices[1].z = rightY; cvVertices[2].colour = D3DCOLOR_XRGB(255, 255, 255); cvVertices[2].x = apexX; cvVertices[2].y = apexZ; cvVertices[2].z = apexY; VOID* pVertices; //Get a pointer to the vertex buffer vertices and lock the vertex buffer m_pVertexBuffer->Lock(0, sizeof(cvVertices), (VOID**)&pVertices, 0); //Copy our stored vertices values into the vertex buffer memcpy(pVertices, cvVertices, sizeof(cvVertices)); //Unlock the vertex buffer m_pVertexBuffer->Unlock(); HRESULT hr = m_pD3DDevice->SetStreamSource(0, m_pVertexBuffer, 0, sizeof(CUSTOMVERTEX)); hr = m_pD3DDevice->SetFVF(D3DFVF_CUSTOMVERTEX); hr = m_pD3DDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 1); Using DirectX9 I get a tower of random triangles instead of smooth flowing terrain I get in OpenGL. Thanks, Strahan [edited by - strahan on January 7, 2004 2:37:26 PM] [edited by - strahan on January 7, 2004 2:37:44 PM] [edited by - strahan on January 7, 2004 2:38:45 PM]

Graphics and GPU Programming Programming OpenGL

Started by strahan January 07, 2004 01:37 PM

11 comments, last by strahan 20 years, 3 months ago

strahan

121

Author

January 07, 2004 02:16 PM

Right, I am not doing it by any means in an efficient way. Just trying to get it to render correctly first.

Here is a screen shot of my tower of triangles that should be roam terrain:

http://www.3dconquest.com/images/tower.jpg

Btw, does anyone know of a good ROAM or LOD implementation in DirectX 9 that would be easily added to one''s own 3d engine?

Thanks.

ReType

122

January 07, 2004 02:25 PM

Hi there.... why you wanna switch to D3D? I try to port all my work to OGL now!

evolutional

1,397

January 08, 2004 02:47 AM

Also,

Ensure that you set up a identity World Matrix (basically resets the scene)

I assume your view and projection matrices are set up properly too (although it won''t make much difference in this instance)

OpenGL -> DirectX 9 Conversion

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OpenGL -> DirectX 9 Conversion

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