using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Intrinsics_script : MonoBehaviour
{

    private Camera camera;
    private Matrix4x4 mat;
    // Start is called before the first frame update
    void Start()
    {
        camera = Camera.main;

        var fx = 825.43306f;
        fx = 30f;
        var cx = 301.38953f;
        cx = 0.5f;
        var fy = 827.13187f;
        fy = 50f;
        var cy = 226.14987f;
        cy = 10f;

        var w = 640f;
        var h = 480f;

        var n = camera.nearClipPlane;
        var f = camera.farClipPlane;

        mat = new Matrix4x4(new Vector4((2 * fx) / w, 0, ((-2 * cx) / w) + 1, 0),
                            new Vector4(0, (2 * fy) / h, ((-2 * cy) / h) + 1, 0),
                            new Vector4(0, 0, -((f + n) / (f - n)), -((2 * f * n) / (f - n))),
                            new Vector4(0, 0, -1, 0)).transpose;

        /*mat = new Matrix4x4(new Vector4(840.01807f, 0, 0, 0),
                            new Vector4(0, 839.97010f, 0, 0),
                            new Vector4(336.13803f, 233.38745f, 1, 0),
                            new Vector4(0, 0, 0, 1));*/

        Vector4 column1 = new Vector4(731.02189f, 0f, 0f, 0f);
        Vector4 column2 = new Vector4(0f, 733.00744f, 0f, 0f);
        Vector4 column3 = new Vector4(372.63904f, 226.81776f, 1f, 0f);
        Vector4 column4 = new Vector4(0f, 0f, 0f, 1f);

        //mat = new Matrix4x4(column1, column2, column3, column4);


        print(camera.projectionMatrix);

        //camera.projectionMatrix = mat;

        print(camera.projectionMatrix);
        mat = camera.projectionMatrix;

    }

    // Update is called once per frame
    void Update()
    {
        Matrix4x4 p = mat;
        p.m01 += Mathf.Sin(Time.time * 1.2F) * 0.1F;
        p.m10 += Mathf.Sin(Time.time * 1.5F) * 0.1F;
        camera.projectionMatrix = p;
    }
}