c# - 有没有更简单的方法在 XNA 中制作 3D 模型的动画？

Question

目前，我正在努力理解和使用 XNA 制作 3D 动画。

我的模型原来是这样的:

我不希望它的双臂像这样伸到一边。使用 XNA，我尝试将 ARM 放在一边，结果如下:

我使用的代码是微软的 XNA Animation Sample:

public class SkinningSampleGame : Microsoft.Xna.Framework.Game
{
    /* Other stuff here */

    private Matrix rotate(float X, float Y, float Z)
    {
        return Matrix.CreateRotationX(MathHelper.ToRadians(X)) * Matrix.CreateRotationY(MathHelper.ToRadians(Y)) * Matrix.CreateRotationZ(MathHelper.ToRadians(Z));
    }

    protected override void Update(GameTime gameTime)
    {
        float time = (float)gameTime.ElapsedGameTime.TotalMilliseconds;

        //transform the model's left arm.

        int boneId = currentModel.Bones["swat:LeftShoulder"].Index - 3;
        animationPlayer.boneTransforms[boneId] = rotate(-2.593f, 1.84f, -14.782f) * Matrix.CreateTranslation(new Vector3(2, -3, 5)) * _originalBonesMatrix[boneId];

        boneId = currentModel.Bones["swat:LeftShoulder"].Index - 2;
        animationPlayer.boneTransforms[boneId] = rotate(0, -30, -56f) * Matrix.CreateTranslation(new Vector3(-25, 2, -1)) * _originalBonesMatrix[boneId];

        boneId = currentModel.Bones["swat:LeftShoulder"].Index - 1;
        animationPlayer.boneTransforms[boneId] = rotate(0, -2, -5f) * Matrix.CreateTranslation(new Vector3(0, 0, 0)) * _originalBonesMatrix[boneId];


        //Transform model's right arm (the messed up arm)..

        boneId = currentModel.Bones["swat:RightShoulder"].Index - 8;
        animationPlayer.boneTransforms[boneId] = rotate(-2.593f, 1.84f, 14.782f) * Matrix.CreateTranslation(new Vector3(5, 3, 5)) * _originalBonesMatrix[boneId];

        boneId = currentModel.Bones["swat:RightShoulder"].Index - 7;
        animationPlayer.boneTransforms[boneId] = rotate(0, 7, 56f) * Matrix.CreateTranslation(new Vector3(-15, -2, 1)) * _originalBonesMatrix[boneId];

        boneId = currentModel.Bones["swat:RightShoulder"].Index - 1;
        animationPlayer.boneTransforms[boneId] = rotate(0, 2, 5f) * Matrix.CreateTranslation(new Vector3(0, 0, 0)) * _originalBonesMatrix[boneId];

        animationPlayer.UpdateWorldTransforms(Matrix.Identity);
        animationPlayer.UpdateSkinTransforms();
        base.Update(gameTime);
    }

    protected override void Draw(GameTime gameTime)
    {
        GraphicsDevice device = graphics.GraphicsDevice;

        device.Clear(Color.CornflowerBlue);

        Matrix[] bones = animationPlayer.GetSkinTransforms();

        // Compute camera matrices.
        Matrix view = Matrix.CreateScale(0.005f) * Matrix.CreateTranslation(0, 0, 0) * Matrix.CreateRotationY(MathHelper.ToRadians(0)) * 
                      Matrix.CreateLookAt(new Vector3(0, 1, 1), Vector3.Forward, Vector3.Up);

        Matrix projection = Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4, device.Viewport.AspectRatio, 0.1f, 1000f);

        // Render the skinned mesh.
        foreach (ModelMesh mesh in currentModel.Meshes)
        {
            foreach (SkinnedEffect effect in mesh.Effects)
            {
                effect.SetBoneTransforms(bones);

                effect.View = view;
                effect.Projection = projection;

                effect.EnableDefaultLighting();

                effect.SpecularColor = new Vector3(0.35f);
                effect.SpecularPower = 16;
            }

            mesh.Draw();
        }

        base.Draw(gameTime);
    }
}

模型中的骨骼是:

我希望它像这样平滑:

我如何使用 XNA 执行此操作？有没有更简单的方法来制作 body 部位的动画？我花了最后 3 个小时只做左臂，并使用试错来计算每个部分的变形量。它看起来不错，但不是“很好”。

Answer 1

复杂 3D 几何体的动画完全使用视觉动画工具完成。即使使用正确的工具，也需要许多小时的练习才能正确使用。

有各种免费或商业的 3D 建模和动画软件包。首先，我建议您查看 Blender .