Hi Im new to DX I try to Program with it but something was wrong, I didnt know how to fix So I post it in here , and have you look it up for me THanks I couldnt see my triangle but a blue windows 800x600 My Triangle lies on Plane X0Y , My Camera floating above and look down to XOY Plane , it has 0,0,1 Vector is a Up Vector; #define CUSTOMFVF (D3DFVF_XYZ|D3DFVF_DIFFUSE) struct CVertex { float x,y,z; DWORD Diff; };

Quote: void Init() { CVertex Data[3]={{-50,0,0,D3DCOLOR_XRGB(255,0,0)},{50,0,0,D3DCOLOR_XRGB(0,255,0)},{0,0,100,D3DCOLOR_XRGB(0,0,255)}}; d3ddev->CreateVertexBuffer(3*sizeof(CVertex),0,CUSTOMFVF,D3DPOOL_MANAGED,&Buffer,NULL); void *p; Buffer->Lock(0,0,&p,0); memcpy(p,Data,sizeof(Data)); Buffer->Unlock(); D3DXMATRIX MatView; D3DXMatrixLookAtLH(&MatView,&D3DXVECTOR3(100,100,100),&D3DXVECTOR3(0,0,0),&D3DXVECTOR3(0,0,1)); d3ddev->SetTransform(D3DTS_VIEW,&MatView); D3DXMATRIX Proj; D3DXMatrixPerspectiveFovLH(&Proj,60,float(WID)/HI,1,100); d3ddev->SetTransform(D3DTS_PROJECTION,&Proj); }

Quote: void Render() { d3ddev->Clear(0,NULL,D3DCLEAR_TARGET,D3DCOLOR_XRGB(91,148,217),1.0,0); d3ddev->BeginScene(); d3ddev->SetStreamSource(0,Buffer,0,sizeof(CVertex)); d3ddev->DrawPrimitive(D3DPT_TRIANGLELIST,0,1); d3ddev->EndScene(); d3ddev->Present(NULL,NULL,NULL,NULL); }

Thanks , it turned out that I had to change RenderState to cull CW or Did what you said.

Two more stupid questions:

1- When Ever I change to FullScreen Mode my program take 100% CPU ,what I did was
WS_POPUP|WS_CLIPSIBLINGS|WS_CLIPCHILDREN
BackBuffer --> A8R8G8B8;
BackBuffer High and Wid = 800 and 600
Window = FALSE;

In Window Mode that only took 7-9 %CPU

2- with the same task , OpenGL only took 2-4 %CPU , So is there any cure for DirectX

PS : Why do we have to SetFVF(CUSTOMFVF) everytime we render but yet we already :
CreateVertexBuffer(3*sizeof(CUSTOMVERTEX),0,CUSTOMFVF,….)

In windowed mode, your application's framerate is probably being limited by vertical sync, whereas in full screen mode it can run unthrottled. Read about the D3DPRESENT_INTERVAL_* defines here (particularly IMMEDIATE and DEFAULT/ONE), and double check any relevant settings in your video card driver control panel.