如何將相機和模型一起旋轉？

Question

我試過把它們一起旋轉的方法。我試圖將它們添加到相同的位置並添加一個旋轉，但它們具有不同的旋轉軸。如果有人知道更好的xna並找到解決方案，請告訴我。這是我的代碼：

我的相機

// Get the new keyboard and mouse state 
     MouseState mouseState = Mouse.GetState(); 
     KeyboardState keyState = Keyboard.GetState(); 
     // Determine how much the camera should turn 
     float deltaX = (float)lastMouseState.X - (float)mouseState.X; 
     float deltaY = (float)lastMouseState.Y - (float)mouseState.Y; 
     // Rotate the camera 
     ((FreeCamera)camera).Rotate(deltaX * .003f, deltaY * .003f); 
     Vector3 translation = Vector3.Zero; 
     // Determine in which direction to move the camera 
     if (keyState.IsKeyDown(Keys.W)) translation += Vector3.Forward; 
     if (keyState.IsKeyDown(Keys.S)) translation += Vector3.Backward; 
     if (keyState.IsKeyDown(Keys.A)) translation += Vector3.Left; 
     if (keyState.IsKeyDown(Keys.D)) translation += Vector3.Right; 
     // Move 3 units per millisecond, independent of frame rate 
     translation *= 4 * (float)gameTime.ElapsedGameTime. 
     TotalMilliseconds; 
     // Move the camera 
     ((FreeCamera)camera).Move(translation); 
     // Update the camera 
     camera.Update(); 
     // Update the mouse state 
     lastMouseState = mouseState; 

我的模型類

class CModel 
{ 
    public Vector3 Position { get; set; } 
    public Vector3 Rotation { get; set; } 
    public Vector3 Scale { get; set; } 

    public Model Model {get; private set;} 
    private Matrix[] modelTransforms; 
    private GraphicsDevice graphicsDevice; 
    private BoundingSphere boundingSphere; 

    public CModel(Model Model, Vector3 Position, Vector3 Rotation, Vector3 Scale, GraphicsDevice graphicsDevice) 
    { 
     this.Model = Model; 

     modelTransforms = new Matrix[Model.Bones.Count]; 
     Model.CopyAbsoluteBoneTransformsTo(modelTransforms); 

     buildBoundingSphere(); 

     this.Position = Position; 
     this.Rotation = Rotation; 
     this.Scale = Scale; 

     this.graphicsDevice = graphicsDevice; 
    } 

public void Draw(Matrix View, Matrix Projection) 
    { 
     // Calculate the base transformation by combining 
     // translation, rotation, and scaling 
     Matrix baseWorld = Matrix.CreateScale(Scale) * Matrix.CreateFromYawPitchRoll(Rotation.X, Rotation.Y, Rotation.Z) * Matrix.CreateTranslation(Position); 

     foreach (ModelMesh mesh in Model.Meshes) 
     { 
      Matrix localWorld = modelTransforms[mesh.ParentBone.Index] * baseWorld; 

      foreach (ModelMeshPart meshPart in mesh.MeshParts) 
      { 
       BasicEffect effect = (BasicEffect)meshPart.Effect; 

       effect.World = localWorld; 
       effect.View = View; 
       effect.Projection = Projection; 

       effect.EnableDefaultLighting(); 
      } 

      mesh.Draw(); 
     } 

Answer 1

也許相機是模型類的一部分，然後更新與玩家位置的攝像頭。

Answer 2

嘗試使用Microsoft示例的Chase camera，它將遵循您的模型並隨其旋轉。