Question

我尝试使用不同的旋转方式旋转一些顶点 - GL.Rotate，Matrix4.CreateRotationX和Matrix4.RotateX。令我惊讶的是，他们给出了不同的输这是创建三个矩阵并将它们输出到控制台的函数。

    private void for_debug()
    {
        Vector3 CubeRotationAnglesInDeg = new Vector3(15, 29, 84);

        Matrix4 XCubeRotationMatrix1 = Matrix4.CreateRotationX(Helper.ToRadians(CubeRotationAnglesInDeg.X)),
                YCubeRotationMatrix1 = Matrix4.CreateRotationY(Helper.ToRadians(CubeRotationAnglesInDeg.Y)),
                ZCubeRotationMatrix1 = Matrix4.CreateRotationZ(Helper.ToRadians(CubeRotationAnglesInDeg.Z));
        Matrix4 finalMatrixMine1 = XCubeRotationMatrix1 * YCubeRotationMatrix1 * ZCubeRotationMatrix1;


        Matrix4 XCubeRotationMatrix2 = Matrix4.RotateX(Helper.ToRadians(CubeRotationAnglesInDeg.X)),
                YCubeRotationMatrix2 = Matrix4.RotateY(Helper.ToRadians(CubeRotationAnglesInDeg.Y)),
                ZCubeRotationMatrix2 = Matrix4.RotateZ(Helper.ToRadians(CubeRotationAnglesInDeg.Z));
        Matrix4 finalMatrixMine2 = XCubeRotationMatrix2 * YCubeRotationMatrix2 * ZCubeRotationMatrix2;


        GL.MatrixMode(MatrixMode.Modelview);
        GL.LoadIdentity();
        GL.Rotate(CubeRotationAnglesInDeg.X, Vector3.UnitX);
        GL.Rotate(CubeRotationAnglesInDeg.Y, Vector3.UnitY);
        GL.Rotate(CubeRotationAnglesInDeg.Z, Vector3.UnitZ);
        Matrix4 finalMatrixOpen;
        GL.GetFloat(GetPName.ModelviewMatrix, out finalMatrixOpen);

        Console.WriteLine(finalMatrixMine1.Column0);
        Console.WriteLine(finalMatrixMine1.Column1);
        Console.WriteLine(finalMatrixMine1.Column2);
        Console.WriteLine(finalMatrixMine1.Column3);
        Console.WriteLine();

        Console.WriteLine(finalMatrixMine2.Column0);
        Console.WriteLine(finalMatrixMine2.Column1);
        Console.WriteLine(finalMatrixMine2.Column2);
        Console.WriteLine(finalMatrixMine2.Column3);
        Console.WriteLine();

        Console.WriteLine(finalMatrixOpen.Column0);
        Console.WriteLine(finalMatrixOpen.Column1);
        Console.WriteLine(finalMatrixOpen.Column2);
        Console.WriteLine(finalMatrixOpen.Column3);
        Console.WriteLine();

        Console.WriteLine();
        Console.WriteLine();
        Console.WriteLine();
        Console.WriteLine();
    }

这是ToRadians功能

    public static float ToRadians(float degrees)
    {
        return degrees * (float)(Math.PI / 180f);
    }

这是正常的，我该怎么做才能使结果相同？

编辑：这是输出

(0.09142262, -0.9475183, 0.3063508, 0) 
(0.8698285, 0.2257573, 0.4386708, 0) 
(-0.4848096, 0.2263682, 0.8448178, 0) 
(0, 0, 0, 1) 

(0.09142262, -0.9475183, 0.3063508, 0)
(0.8698285, 0.2257573, 0.4386708, 0)
(-0.4848096, 0.2263682, 0.8448178, 0)
(0, 0, 0, 1)

(0.09142266, -0.8698285, 0.4848096, 0)
(0.9737504, -0.02382383, -0.2263682, 0)
(0.2084515, 0.4927787, 0.8448178, 0)
(0, 0, 0, 1)

Answer 1

它们应该相同，至少是Matrix4.CreateRotationX和Matrix4.RotateX。功能的定义是相同的。在这里：http://www.opentk.com/files/doc/struct_open_t_k_1_1_matrix4.html#ae9868e1bd3b8aa411abd848e107a55af。

Answer 2

我怀疑你应该以相反的顺序放置你的GL.Rotate（）命令以获得所需的结果。

GL.Rotate和Matrix 4.创建旋转不同的输出

2 个答案: