> Hi,
>
> I'm a noob trying to use managed DirectX (VC# 2003, DX9.0 Apr 2005 SDK).
I
> used to use OpenGL with QT and VC++6.0, but I was a relative newcomer to
> that as well.
>
> When I used OpenGL, my understanding was that if you used display lists,
> your vertices would normally be held in memory on the video card. Now,
with
> managed DirectX, I am looking at code that looks like this:
>
> public void OnCreateVertexBuffer(object sender, EventArgs e)
> {
> VertexBuffer vb = (VertexBuffer)sender;
> CustomVertex.PositionColored[] verts =
> (CustomVertex.PositionColored[])vb.Lock(0,0);
> verts[0].X=-1.0f; verts[0].Y=-1.0f; verts[0].Z=0.0f; verts[0].Color =
> System.Drawing.Color.DarkGoldenrod.ToArgb();
> verts[1].X=1.0f; verts[1].Y=-1.0f ;verts[1].Z=0.0f; verts[1].Color =
> System.Drawing.Color.MediumOrchid.ToArgb();
> verts[2].X=0.0f; verts[2].Y=1.0f; verts[2].Z = 0.0f; verts[2].Color =
> System.Drawing.Color.Cornsilk.ToArgb();
> vb.Unlock();
> }
>
> private void Render()
> {
> if (device == null)
> return;
> if (pause)
> return;
> //Clear the backbuffer to a blue color
> device.Clear(ClearFlags.Target, System.Drawing.Color.Blue, 1.0f, 0);
> //Begin the scene
> device.BeginScene();
> // Setup the world, view, and projection matrices
> SetupMatrices();
> device.SetStreamSource(0, vertexBuffer, 0);
> device.VertexFormat = CustomVertex.PositionColored.Format;
> device.DrawPrimitives(PrimitiveType.TriangleList, 0, 1);
> //End the scene
> device.EndScene();
> device.Present();
> }
>
> Now, this code takes it's vertices from the Stream Source (the
vertexBuffer)
> which is in main CPU memory. I'm guessing these vertices have to cross
the
> bus to the video card, and then they are displayed. That sounds slower
than
> OpenGL display lists! Is there something in managed DirectX like an
OpenGL
> display list where the vertices are held in video card memory?
>
> Thanks in advance,
> Aaron Lovi
> support@pokervillain.com
>
>
>