float rotate = 0.0f;

void Render()
{
	// clear the back buffer to blue
	g_d3d9Device->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,0,255), 1.0f, 0);

	// begin the scene
	g_d3d9Device->BeginScene();

	// Create a DX matrix
	D3DXMATRIX matWorld;

	// set the world matrix back to the identity matrix
	D3DXMatrixIdentity(&matWorld);
	g_d3d9Device->SetTransform(D3DTS_WORLD, &matWorld );

	// set a continuous rotation on the y axis
	D3DXMatrixRotationY( &matWorld, (rotate*3.141f) / 180.0f );
	g_d3d9Device->SetTransform(D3DTS_WORLD, &matWorld );

	// increase rotation
	rotate += 1.05f;

	// DEBUG
	printf("rotate: %f\n", rotate);

	// reset matrix object back to identity
	D3DXMatrixIdentity( &matWorld );

	// get the current world transform
	g_d3d9Device->GetTransform(D3DTS_WORLD, &matWorld);

	for(int i=0; i < 4; ++i){
		for(int j=0; j < 4; ++j)
			printf("\t%f",  matWorld.m[j]);

		printf("\n");
	}

	printf("\n\n");
	// DEBUG
	

	// to render vertex buffers we need to set the stream source
	g_d3d9Device->SetStreamSource(	0,			// the stream number to use
					g_vertexBuffer,		// the pointer to the vertex buffer
					0,			// the offset from the pointer to the vertex data
					sizeof(CustomVertex) );	// the size of the vertex structure
	
	// define the vertex data layout
	g_d3d9Device->SetFVF( D3DFVF_CUSTOMVERTEX );

	// render the triangle
	g_d3d9Device->DrawPrimitive(	D3DPT_TRIANGLELIST,	// draw triangles
					0,			// the index of the first triangle
					1 );			// the number of triangles to draw (there is only 1 in the buffer)

	// end the scene
	g_d3d9Device->EndScene();

	// display the scene to the window
	g_d3d9Device->Present(NULL, NULL, NULL, NULL);

}