[Unity] Camera Projection Matrix

Unity에서 camera의 projection matrix를 다루는 간단한 예제이다

 

Unity에서는 projection matrix를 수정한다고 해서 camera transform 객체의 position이나 rotation값이 바뀌지 않는다.

 

game view에 화면이 뿌려지기 직전에 projection matrix가 반영되므로, transform 객체와는 아예 별개라고 생각하면 된다.

 

 

 

	using UnityEngine;
	using System.Collections;
	public class CamMatrixControl : MonoBehaviour
	{
	public float rotate_angle = 0;
	public float scale = 1;
	public Vector2 shearing = Vector2.zero;
	public Vector2 translation = Vector2.zero;
	private Matrix4x4 MatRotate = Matrix4x4.identity;
	private Matrix4x4 MatScale = Matrix4x4.identity;
	private Matrix4x4 MatXShearing = Matrix4x4.identity;
	private Matrix4x4 MatYShearing = Matrix4x4.identity;
	private Matrix4x4 MatTranslation = Matrix4x4.identity;
	private Matrix4x4 OriMatProjection;
	private Camera cam;
	// Use this for initialization
	void Start()
	{
	cam = Camera.main;
	OriMatProjection = cam.projectionMatrix;
	}
	// Update is called once per frame
	void Update()
	{
	MatScale[0, 0] = scale;
	MatScale[1, 1] = scale;
	MatRotate[0, 0] = Mathf.Cos(rotate_angle * Mathf.Deg2Rad);
	MatRotate[0, 1] = -Mathf.Sin(rotate_angle * Mathf.Deg2Rad);
	MatRotate[1, 0] = Mathf.Sin(rotate_angle * Mathf.Deg2Rad);
	MatRotate[1, 1] = Mathf.Cos(rotate_angle * Mathf.Deg2Rad);
	MatXShearing[0, 1] = shearing.x;
	MatYShearing[1, 0] = shearing.y;
	MatTranslation[0, 2] = translation.x;
	MatTranslation[1, 2] = translation.y;
	cam.projectionMatrix = OriMatProjection *
	MatScale *
	MatRotate *
	MatXShearing *
	MatYShearing *
	MatTranslation;
	}
	}

view raw CamMatrixControl.cs hosted with ❤ by GitHub