private int AddVertexToMesh(Vector3 point, Color color, Vector3 normal)
{
//Make it into a vertex
VertexPositionColorNormal v = new VertexPositionColorNormal(point, color, normal);
//Check if vertex already exists
//if (VertexList.Contains(v))
//return VertexList.IndexOf(v);
//else
{
VertexList.Add(v);
return(VertexList.Count - 1);
}
}
private void ConstructCube()
{
vertices = new VertexPositionColorNormal[NUM_VERTICES];
//Values are set from the bottomleftfront corner of a box.
// Calculate the position of the vertices on the top face.
Vector3 topLeftFront = position + new Vector3(0.0f, 1.0f, 0.0f) * Size;
Vector3 topLeftBack = position + new Vector3(0.0f, 1.0f, 1.0f) * Size;
Vector3 topRightFront = position + new Vector3(1.0f, 1.0f, 0.0f) * Size;
Vector3 topRightBack = position + new Vector3(1.0f, 1.0f, 1.0f) * Size;
// Calculate the position of the vertices on the bottom face.
Vector3 btmLeftFront = position + new Vector3(0.0f, 0.0f, 0.0f) * Size;
Vector3 btmLeftBack = position + new Vector3(0.0f, 0.0f, 1.0f) * Size;
Vector3 btmRightFront = position + new Vector3(1.0f, 0.0f, 0.0f) * Size;
Vector3 btmRightBack = position + new Vector3(1.0f, 0.0f, 1.0f) * Size;
// Normal vectors for each face (needed for lighting / display)
Vector3 normalFront = new Vector3(0.0f, 0.0f, 1.0f) * Size;
Vector3 normalBack = new Vector3(0.0f, 0.0f, -1.0f) * Size;
Vector3 normalTop = new Vector3(0.0f, 1.0f, 0.0f) * Size;
Vector3 normalBottom = new Vector3(0.0f, -1.0f, 0.0f) * Size;
Vector3 normalLeft = new Vector3(-1.0f, 0.0f, 0.0f) * Size;
Vector3 normalRight = new Vector3(1.0f, 0.0f, 0.0f) * Size;
// UV texture coordinates
Vector2 textureTopLeft = new Vector2(1.0f * Size.X, 0.0f * Size.Y);
Vector2 textureTopRight = new Vector2(0.0f * Size.X, 0.0f * Size.Y);
Vector2 textureBottomLeft = new Vector2(1.0f * Size.X, 1.0f * Size.Y);
Vector2 textureBottomRight = new Vector2(0.0f * Size.X, 1.0f * Size.Y);
// Add the vertices for the FRONT face.
vertices[0] = new VertexPositionColorNormal(topLeftFront, Color, normalFront);
vertices[1] = new VertexPositionColorNormal(btmLeftFront, Color, normalFront);
vertices[2] = new VertexPositionColorNormal(topRightFront, Color, normalFront);
vertices[3] = new VertexPositionColorNormal(btmLeftFront, Color, normalFront);
vertices[4] = new VertexPositionColorNormal(btmRightFront, Color, normalFront);
vertices[5] = new VertexPositionColorNormal(topRightFront, Color, normalFront);
// Add the vertices for the BACK face.
vertices[6] = new VertexPositionColorNormal(topLeftBack, Color, normalBack);
vertices[7] = new VertexPositionColorNormal(topRightBack, Color, normalBack);
vertices[8] = new VertexPositionColorNormal(btmLeftBack, Color, normalBack);
vertices[9] = new VertexPositionColorNormal(btmLeftBack, Color, normalBack);
vertices[10] = new VertexPositionColorNormal(topRightBack, Color, normalBack);
vertices[11] = new VertexPositionColorNormal(btmRightBack, Color, normalBack);
// Add the vertices for the TOP face.
vertices[12] = new VertexPositionColorNormal(topLeftFront, Color, normalTop);
vertices[13] = new VertexPositionColorNormal(topRightBack, Color, normalTop);
vertices[14] = new VertexPositionColorNormal(topLeftBack, Color, normalTop);
vertices[15] = new VertexPositionColorNormal(topLeftFront, Color, normalTop);
vertices[16] = new VertexPositionColorNormal(topRightFront, Color, normalTop);
vertices[17] = new VertexPositionColorNormal(topRightBack, Color, normalTop);
// Add the vertices for the BOTTOM face.
vertices[18] = new VertexPositionColorNormal(btmLeftFront, Color, normalBottom);
vertices[19] = new VertexPositionColorNormal(btmLeftBack, Color, normalBottom);
vertices[20] = new VertexPositionColorNormal(btmRightBack, Color, normalBottom);
vertices[21] = new VertexPositionColorNormal(btmLeftFront, Color, normalBottom);
vertices[22] = new VertexPositionColorNormal(btmRightBack, Color, normalBottom);
vertices[23] = new VertexPositionColorNormal(btmRightFront, Color, normalBottom);
// Add the vertices for the LEFT face.
vertices[24] = new VertexPositionColorNormal(topLeftFront, Color, normalLeft);
vertices[25] = new VertexPositionColorNormal(btmLeftBack, Color, normalLeft);
vertices[26] = new VertexPositionColorNormal(btmLeftFront, Color, normalLeft);
vertices[27] = new VertexPositionColorNormal(topLeftBack, Color, normalLeft);
vertices[28] = new VertexPositionColorNormal(btmLeftBack, Color, normalLeft);
vertices[29] = new VertexPositionColorNormal(topLeftFront, Color, normalLeft);
// Add the vertices for the RIGHT face.
vertices[30] = new VertexPositionColorNormal(topRightFront, Color, normalRight);
vertices[31] = new VertexPositionColorNormal(btmRightFront, Color, normalRight);
vertices[32] = new VertexPositionColorNormal(btmRightBack, Color, normalRight);
vertices[33] = new VertexPositionColorNormal(topRightBack, Color, normalRight);
vertices[34] = new VertexPositionColorNormal(topRightFront, Color, normalRight);
vertices[35] = new VertexPositionColorNormal(btmRightBack, Color, normalRight);
_isConstructed = true;
}
