[SOLVED] Backface Culling, ON, Vertex Primitives or Rotation - Help

@MrValentine wrote:

Hello

So just playing about to get a 3D camera going and I hit a snag, I want to enable err... disable back face culling, but err I don't think my thing is using two faces anyway... the tutorial I am following is using Vertices so err, new concepts for me... a bit...

Since renderstate is switched to Rasterizer... [XNA used Renderstate, looked up the Docs here to find the changes]

    protected override void Initialize()
    {
        RasterizerState rs = new RasterizerState();
        rs.CullMode = CullMode.None;
        base.Initialize();
    }

Which, does not work, but again this is just me having a quick go and just trying to see two faces on that thing if it is easy... but vertices is not a strong point for me here, I am more used to creating a model and texturing it...

Anyway, if there is a way to draw two faces on this thing with a simple fix, please do let me know

My Struct:

    // Vertex data
    VertexPositionTexture[] verts;

My verts: [LoadContent()]

        // Initialize vertices
        verts = new VertexPositionTexture[4];
        verts[0] = new VertexPositionTexture(
            new Vector3(-1, 1, 0), new Vector2(0, 0));
        verts[1] = new VertexPositionTexture(
            new Vector3(1, 1, 0), new Vector2(1, 0));
        verts[2] = new VertexPositionTexture(
            new Vector3(-1, -1, 0), new Vector2(0, 1));
        verts[3] = new VertexPositionTexture(
            new Vector3(1, -1, 0), new Vector2(1, 1));

        // Set vertex data in VertexBuffer
        vertexBuffer = new VertexBuffer(GraphicsDevice, typeof(VertexPositionTexture), verts.Length, BufferUsage.None);
        vertexBuffer.SetData(verts);

        // Initialize the BasicEffect
        effect = new BasicEffect(GraphicsDevice);

        // Load texture
        texture = Content.Load<Texture2D>("Trees");

And my Draw():

    // Set the vertex buffer on the GraphicsDevice
    GraphicsDevice.SetVertexBuffer(vertexBuffer);

    //Set object and camera info
    effect.World = worldRotation * worldTranslation * worldRotation;
    effect.View = camera.view;
    effect.Projection = camera.projection;
    effect.Texture = texture;
    effect.TextureEnabled = true;
    
    // Begin effect and draw for each pass
    foreach (EffectPass pass in effect.CurrentTechnique.Passes)
    {
        pass.Apply();

        GraphicsDevice.DrawUserPrimitives<VertexPositionTexture>
            (PrimitiveType.TriangleStrip, verts, 0, 2);

    }

I should probably add, this is using the GameComponent class... something I am still new to.

I was thinking to just duplicate the verts data and create a mirrored version offset from where the existing one is... but pretty sure I will mess it up, so just seeing if there is a snappy method someone may know.

Thanks.

Before posting this I tried creating another struct called vertsa and essentially:

        vertsa = new VertexPositionTexture[4];
        vertsa[0] = new VertexPositionTexture(
            new Vector3(-2, 2, 1), new Vector2(0, 0));
        vertsa[1] = new VertexPositionTexture(
            new Vector3(2, 2, 1), new Vector2(2, 0));
        vertsa[2] = new VertexPositionTexture(
            new Vector3(-2, -2, 1), new Vector2(0, 1));
        vertsa[3] = new VertexPositionTexture(
            new Vector3(2, -2, 1), new Vector2(1, 1));

But, I am still lost as to how to turn this thing around... note that I intentionally made it twice the size... I just want to rotate it by 180 on the y axis...

I suspect the effect bit to be involved in rotating it but, unsure right now as it is just past 05:00 now

Anyone know how I rotate it?

EDIT

A temporary measure, but yet again I suffer the facing issue...

        vertsa = new VertexPositionTexture[4];
        vertsa[0] = new VertexPositionTexture(
            new Vector3(-1, 1, 1), new Vector2(1, 1));
        vertsa[1] = new VertexPositionTexture(
            new Vector3(1, 1, 1), new Vector2(0, 1));
        vertsa[2] = new VertexPositionTexture(
            new Vector3(-1, 1, -1), new Vector2(1, 0));
        vertsa[3] = new VertexPositionTexture(
            new Vector3(1, 1, -1), new Vector2(0, 0));

Which results in:

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Participants: 2

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