vertice - beginner question

dontoo · 2010-02-19T11:35:54

I want to render square. I found in DirectX SDK tutoarial how to render triangel by using three Vertices and render them using this command g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, 1 ); Guess I need 6 vertices in CUSTOMVERTEX struct, and i need to change g_pd3dDevice->DrawPrimitive command but i don't know how :(. Another question.. I need to write color in this fashion 0xffff0000 but when I use photoshop color mixer I get color in this fashion 85c4fe. Should I just write 0xff before color number? HRESULT InitVB() { // Initialize three Vertices for rendering a triangle CUSTOMVERTEX Vertices[] = { { 150.0f, 50.0f, 0.5f, 1.0f, 0xffff0000, }, // x, y, z, rhw, color { 250.0f, 250.0f, 0.5f, 1.0f, 0xff00ff00, }, { 50.0f, 250.0f, 0.5f, 1.0f, 0xff00ffff, } }; // Create the vertex buffer. Here we are allocating enough memory // (from the default pool) to hold all our 3 custom Vertices. We also // specify the FVF, so the vertex buffer knows what data it contains. if( FAILED( g_pd3dDevice->CreateVertexBuffer( 3 * sizeof( CUSTOMVERTEX ), 0, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL ) ) ) { return E_FAIL; } // Now we fill the vertex buffer. To do this, we need to Lock() the VB to // gain access to the Vertices. This mechanism is required becuase vertex // buffers may be in device memory. VOID* pVertices; if( FAILED( g_pVB->Lock( 0, sizeof( Vertices ), ( void** )&pVertices, 0 ) ) ) return E_FAIL; memcpy( pVertices, Vertices, sizeof( Vertices ) ); g_pVB->Unlock(); return S_OK; } /////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////// //----------------------------------------------------------------------------- // Name: Render() // Desc: Draws the scene //----------------------------------------------------------------------------- VOID Render() { // Clear the backbuffer to a blue color g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB( 0, 0, 255 ), 1.0f, 0 ); // Begin the scene if( SUCCEEDED( g_pd3dDevice->BeginScene() ) ) { // Draw the triangles in the vertex buffer. This is broken into a few // steps. We are passing the Vertices down a "stream", so first we need // to specify the source of that stream, which is our vertex buffer. Then // we need to let D3D know what vertex shader to use. Full, custom vertex // shaders are an advanced topic, but in most cases the vertex shader is // just the FVF, so that D3D knows what type of Vertices we are dealing // with. Finally, we call DrawPrimitive() which does the actual rendering // of our geometry (in this case, just one triangle). g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof( CUSTOMVERTEX ) ); g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX ); g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, 1 ); // End the scene g_pd3dDevice->EndScene(); } // Present the backbuffer contents to the display g_pd3dDevice->Present( NULL, NULL, NULL, NULL ); }