Unity | Rotation MatrixをUnity5.6で作成する

World, View and Projection Transformation Matrices

Since Matrix4x4.Rotate does not exist in Unity5.6, you might need to make a rotation matrix from Matrix4x4. I found this article quite helpful.
(Unity5.6にはMatrix4x4.RotateがないのでMatrix4x4から自作する必要があるだろう。
この記事World, View and Projection Transformation Matricesが非常に参考になった。)

        Matrix4x4 rotmat = Matrix4x4.identity;

        rotmat.m00 = Mathf.Cos((yRotationDegree * Mathf.PI) / 180);
        rotmat.m02 = Mathf.Sin((yRotationDegree * Mathf.PI) / 180 * -1.0f);
        rotmat.m20 = Mathf.Sin((yRotationDegree * Mathf.PI) / 180);
        rotmat.m22 = Mathf.Cos((yRotationDegree * Mathf.PI) / 180);

You could multiply other matrices and rotmat.
(rotmatと他のMatrixをMultiplyすると取得したい結果が得られるだろう。)

Ref

• World, View and Projection Transformation Matrices
• https://docs.unity3d.com/ScriptReference/Matrix4x4.html
• Getting cosinus of an angle in degrees
• http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-17-quaternions/