如何在XNA上移动3D模型？

发布于 2024-12-05 01:59:55 字数 52 浏览 1 评论 0原文

我想控制我的 3D 模型，将其向各个方向移动，但我不知道如何做到这一点。有人有什么想法吗？

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夕嗳→ 2024-12-12 01:59:55

您只需提供模型的世界变换效果即可。

 Matrix World = Matrix.CreateWorld(position, forward, up);

在您的更新方法中，您可以修改位置：

  LastPosition = Position;  

  if (IsKeyDonw(Left)  Position -= Vector3.UnitX * Speed * ElapsedTime; ForwardDirty = true;     
  if (IsKeyDonw(Right)  Position += Vector3.UnitX * Speed * ElapsedTime; ForwardDirty = true;     
  if (IsKeyDonw(Up)  Position -= Vector3.UnitZ * Speed * ElapsedTime;  ForwardDirty = true;     
  if (IsKeyDonw(Down)  Position += Vector3.UnitZ * Speed * ElapsedTime; ForwardDirty = true;     


// the forward is the direction where will point your model.

if (ForwardDirty) {
     Forward = Position - LastPosition;
     Forward.Normalize();
     ForwardDirty = false;
}

您还可以将您的移动基于向前向量，或者平滑角度变化，将最终向前插值到当前，...

You only have to provide to the effect the model's world transform.

 Matrix World = Matrix.CreateWorld(position, forward, up);

In your update method you can modify the position:

  LastPosition = Position;  

  if (IsKeyDonw(Left)  Position -= Vector3.UnitX * Speed * ElapsedTime; ForwardDirty = true;     
  if (IsKeyDonw(Right)  Position += Vector3.UnitX * Speed * ElapsedTime; ForwardDirty = true;     
  if (IsKeyDonw(Up)  Position -= Vector3.UnitZ * Speed * ElapsedTime;  ForwardDirty = true;     
  if (IsKeyDonw(Down)  Position += Vector3.UnitZ * Speed * ElapsedTime; ForwardDirty = true;     


// the forward is the direction where will point your model.

if (ForwardDirty) {
     Forward = Position - LastPosition;
     Forward.Normalize();
     ForwardDirty = false;
}

You also can base your movement in forward vector, or smooth the angle change interpolating the final forward with the current,...

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