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[.net] Vertex Buffer Colour

Started by Barguast Nov 4, 2004 at 11:26 AM 1 replies 350+ views

Original Post

Nov 4, 2004 at 11:26 AM

I have a vertex buffer which defines a wireframe cube. This vertex buffer uses the PositionOnly vertex type. Is it possible to tell Direct3D what colour to draw this cube without having to use (for example) the PositionColored vertex type? I want to make the colour of the cube changable and I can't think of any way to do this other than recreate the vertex buffer each time the colour is changed... With OpenGL (in C++) I could use the glColor3f function to achieve this effect. Is there anything similar in Direct3D for C#? Thanks

turnpast

Nov 4, 2004 at 2:54 PM

Before you draw your cube you can set up lighting and material on the device:

//materialMaterial m = new Material();m.DiffuseColor = new ColorValue(1.0f,0.0f,0.0f); //REDdevice.Material = m;//lightingdevice.Lights[0].Type = LightType.Directional;device.Lights[0].DiffuseColor = new ColorValue(0.0f,1.0f,0.0f); //GREENdevice.Lights[0].Direction = new Vector3(1.0f,0.0f,0.0f);//in the x directiondevice.Lights[0].Enabled = true;//now draw your cube:device.DrawPrimitive(...);//should be red and lit from the left with a green light.

hope this helps.

Even if you are using a wireframe the materail should take effect.

DrGUI

Nov 5, 2004 at 2:23 PM

Also instead of recreating the vertex buffer (if you meant that literally), you would lock it to modify it.

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