How to apply click event on VertexBuffer in a DrawingSuface control in Silverlight 5 (3D)

Question

Hi All,

I'm working on Silverlight 5(3D) application using drawing surface control.

I'm drawing multiple cubes on a drawing surface control now, how do i get a trigger on click of the particular cube?

here is my code to add cubes to the drawing surface control

for (int i = 0; i < 5; i++)
{
   VertexBuffer vbCube;
   vbCube = CreateCube(X, Y, Z, Length, Bredth, Depth, Color.Black,Color.Red);

  resourceGraphicDevice.SetVertexBuffer(vbCube);
  resourceGraphicDevice.DrawPrimitives(PrimitiveType.TriangleList, 0, 12);
}



VertexBuffer CreateCube(float x,float y,float z, float length, float bredth, float depth, Color foreColor, Color backColor)
        {
            // cube vertices
            var vertexCollection = new VertexPositionColor[36];

            // Front
            // C(x,        y,       z+bredth)
            // D(x+length, y,       z+bredth)
            // A(x,        y+depth, z+bredth)
            // B(x+length, y+depth, z+bredth)
            // A-----------------B
            // |                 |
            // |                 |
            // |                 |
            // C-----------------D
            //  
            // Back
            // G(x,        y,       z)
            // H(x+length, y,       z)
            // E(x,        y+depth, z)
            // F(x+length, y+depth, z)
            //    E-----------------F
            //    |                 |
            //    |                 |
            //    |                 |
            //    G-----------------H

            // front coordinates
            Vector3 cubeA = new Vector3(x, y + depth, z + bredth);
            Vector3 cubeB = new Vector3(x + length, y + depth, z + bredth);
            Vector3 cubeC = new Vector3(x, y, z + bredth);
            Vector3 cubeD = new Vector3(x + length, y, z + bredth);

            // back coordinates
            Vector3 cubeE = new Vector3(x, y + depth, z);
            Vector3 cubeF = new Vector3(x + length, y + depth, z);
            Vector3 cubeG = new Vector3(x, y, z);
            Vector3 cubeH = new Vector3(x + length, y, z);

            // front 
            vertexCollection[0] = new VertexPositionColor(cubeA, foreColor);
            vertexCollection[1] = new VertexPositionColor(cubeB, foreColor);
            vertexCollection[2] = new VertexPositionColor(cubeC, backColor);
            vertexCollection[3] = new VertexPositionColor(cubeB, foreColor);
            vertexCollection[4] = new VertexPositionColor(cubeD, backColor);
            vertexCollection[5] = new VertexPositionColor(cubeC, backColor);

            // back  
            vertexCollection[6] = new VertexPositionColor(cubeG, backColor);
            vertexCollection[7] = new VertexPositionColor(cubeF, foreColor);
            vertexCollection[8] = new VertexPositionColor(cubeE, foreColor);
            vertexCollection[9] = new VertexPositionColor(cubeH, backColor);
            vertexCollection[10] = new VertexPositionColor(cubeF, foreColor);
            vertexCollection[11] = new VertexPositionColor(cubeG, backColor);

            // top 
            vertexCollection[12] = new VertexPositionColor(cubeE, foreColor);
            vertexCollection[13] = new VertexPositionColor(cubeF, foreColor);
            vertexCollection[14] = new VertexPositionColor(cubeA, foreColor);
            vertexCollection[15] = new VertexPositionColor(cubeF, foreColor);
            vertexCollection[16] = new VertexPositionColor(cubeB, foreColor);
            vertexCollection[17] = new VertexPositionColor(cubeA, foreColor);

            // bottom  
            vertexCollection[18] = new VertexPositionColor(cubeH, backColor);
            vertexCollection[19] = new VertexPositionColor(cubeG, backColor);
            vertexCollection[20] = new VertexPositionColor(cubeC, backColor);
            vertexCollection[21] = new VertexPositionColor(cubeD, backColor);
            vertexCollection[22] = new VertexPositionColor(cubeH, backColor);
            vertexCollection[23] = new VertexPositionColor(cubeC, backColor);

            // left 
            vertexCollection[24] = new VertexPositionColor(cubeC, backColor);
            vertexCollection[25] = new VertexPositionColor(cubeG, backColor);
            vertexCollection[26] = new VertexPositionColor(cubeA, foreColor);
            vertexCollection[27] = new VertexPositionColor(cubeA, foreColor);
            vertexCollection[28] = new VertexPositionColor(cubeG, backColor);
            vertexCollection[29] = new VertexPositionColor(cubeE, foreColor);

            // right  
            vertexCollection[30] = new VertexPositionColor(cubeH, backColor);
            vertexCollection[31] = new VertexPositionColor(cubeD, backColor);
            vertexCollection[32] = new VertexPositionColor(cubeB, foreColor);
            vertexCollection[33] = new VertexPositionColor(cubeH, backColor);
            vertexCollection[34] = new VertexPositionColor(cubeB, foreColor);
            vertexCollection[35] = new VertexPositionColor(cubeF, foreColor);

            var vb = new VertexBuffer(resourceGraphicDevice, VertexPositionColor.VertexDeclaration,
            vertexCollection.Length, BufferUsage.WriteOnly);
            vb.SetData(0, vertexCollection, 0, vertexCollection.Length, 0);
            return vb;
        }

Now, from this code how do i get a click event of a particular cube....?

---

Nagarjuna Dilip

Answer 1

Hi,

Can any one help me on this....?

---

Nagarjuna Dilip

Answer 2

.........Any Experts......?

---

Nagarjuna Dilip