protected override void LoadContent() { Model model = Game.Content.Load<Model>(_modelAssetName); BoundingBox boundingBox = CreateBoundingBox(model, _translateMatrix); _buffers = CreateBoundingBoxBuffers(boundingBox, GraphicsDevice); _effect = new BasicEffect(GraphicsDevice); _effect.LightingEnabled = false; _effect.TextureEnabled = false; _effect.VertexColorEnabled = true; base.LoadContent(); }
private BoundingBoxBuffers CreateBoundingBoxBuffers(BoundingBox boundingBox, GraphicsDevice graphicsDevice) { BoundingBoxBuffers boundingBoxBuffers = new BoundingBoxBuffers(); boundingBoxBuffers.PrimitiveCount = 24; boundingBoxBuffers.VertexCount = 48; VertexBuffer vertexBuffer = new VertexBuffer(graphicsDevice, typeof(VertexPositionColor), boundingBoxBuffers.VertexCount, BufferUsage.WriteOnly); List<VertexPositionColor> vertices = new List<VertexPositionColor>(); const float ratio = 5.0f; Vector3 xOffset = new Vector3((boundingBox.Max.X - boundingBox.Min.X) / ratio, 0, 0); Vector3 yOffset = new Vector3(0, (boundingBox.Max.Y - boundingBox.Min.Y) / ratio, 0); Vector3 zOffset = new Vector3(0, 0, (boundingBox.Max.Z - boundingBox.Min.Z) / ratio); Vector3[] corners = boundingBox.GetCorners(); // Corner 1. AddVertex(vertices, corners[0]); AddVertex(vertices, corners[0] + xOffset); AddVertex(vertices, corners[0]); AddVertex(vertices, corners[0] - yOffset); AddVertex(vertices, corners[0]); AddVertex(vertices, corners[0] - zOffset); // Corner 2. AddVertex(vertices, corners[1]); AddVertex(vertices, corners[1] - xOffset); AddVertex(vertices, corners[1]); AddVertex(vertices, corners[1] - yOffset); AddVertex(vertices, corners[1]); AddVertex(vertices, corners[1] - zOffset); // Corner 3. AddVertex(vertices, corners[2]); AddVertex(vertices, corners[2] - xOffset); AddVertex(vertices, corners[2]); AddVertex(vertices, corners[2] + yOffset); AddVertex(vertices, corners[2]); AddVertex(vertices, corners[2] - zOffset); // Corner 4. AddVertex(vertices, corners[3]); AddVertex(vertices, corners[3] + xOffset); AddVertex(vertices, corners[3]); AddVertex(vertices, corners[3] + yOffset); AddVertex(vertices, corners[3]); AddVertex(vertices, corners[3] - zOffset); // Corner 5. AddVertex(vertices, corners[4]); AddVertex(vertices, corners[4] + xOffset); AddVertex(vertices, corners[4]); AddVertex(vertices, corners[4] - yOffset); AddVertex(vertices, corners[4]); AddVertex(vertices, corners[4] + zOffset); // Corner 6. AddVertex(vertices, corners[5]); AddVertex(vertices, corners[5] - xOffset); AddVertex(vertices, corners[5]); AddVertex(vertices, corners[5] - yOffset); AddVertex(vertices, corners[5]); AddVertex(vertices, corners[5] + zOffset); // Corner 7. AddVertex(vertices, corners[6]); AddVertex(vertices, corners[6] - xOffset); AddVertex(vertices, corners[6]); AddVertex(vertices, corners[6] + yOffset); AddVertex(vertices, corners[6]); AddVertex(vertices, corners[6] + zOffset); // Corner 8. AddVertex(vertices, corners[7]); AddVertex(vertices, corners[7] + xOffset); AddVertex(vertices, corners[7]); AddVertex(vertices, corners[7] + yOffset); AddVertex(vertices, corners[7]); AddVertex(vertices, corners[7] + zOffset); vertexBuffer.SetData(vertices.ToArray()); boundingBoxBuffers.Vertices = vertexBuffer; IndexBuffer indexBuffer = new IndexBuffer(graphicsDevice, IndexElementSize.SixteenBits, boundingBoxBuffers.VertexCount, BufferUsage.WriteOnly); indexBuffer.SetData(Enumerable.Range(0, boundingBoxBuffers.VertexCount).Select(i => (short)i).ToArray()); boundingBoxBuffers.Indices = indexBuffer; return boundingBoxBuffers; }