Version: 2021.3

Camera.projectionMatrix

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public Matrix4x4 projectionMatrix ;

描述

设置自定义投影矩阵。

如果更改该矩阵,摄像机将不再根据其 fieldOfView 更新渲染。 在调用 ResetProjectionMatrix 之前,该设置持续有效。

仅在您确实需要非标准投影时,才使用自定义投影。 Unity 的水渲染使用该属性设置一个 倾斜投影矩阵。要使用自定义投影,您必须具备良好的 变换和投影矩阵知识。

注意,可以根据平台和其他状态修改 传递给着色器的投影矩阵。如果需要从摄像机投影计算 供着色器使用的投影矩阵,请使用 GL.GetGPUProjectionMatrix

另请参阅:Camera.nonJitteredProjectionMatrix

// Make camera wobble in a funky way!
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public Matrix4x4 originalProjection; Camera cam;

void Start() { cam = GetComponent<Camera>(); originalProjection = cam.projectionMatrix; }

void Update() { Matrix4x4 p = originalProjection; p.m01 += Mathf.Sin(Time.time * 1.2F) * 0.1F; p.m10 += Mathf.Sin(Time.time * 1.5F) * 0.1F; cam.projectionMatrix = p; } }
// Set an off-center projection, where perspective's vanishing
// point is not necessarily in the center of the screen.
//
// left/right/top/bottom define near plane size, i.e.
// how offset are corners of camera's near plane.
// Tweak the values and you can see camera's frustum change.

using UnityEngine; using System.Collections;

[ExecuteInEditMode] public class ExampleClass : MonoBehaviour { public float left = -0.2F; public float right = 0.2F; public float top = 0.2F; public float bottom = -0.2F; void LateUpdate() { Camera cam = Camera.main; Matrix4x4 m = PerspectiveOffCenter(left, right, bottom, top, cam.nearClipPlane, cam.farClipPlane); cam.projectionMatrix = m; }

static Matrix4x4 PerspectiveOffCenter(float left, float right, float bottom, float top, float near, float far) { float x = 2.0F * near / (right - left); float y = 2.0F * near / (top - bottom); float a = (right + left) / (right - left); float b = (top + bottom) / (top - bottom); float c = -(far + near) / (far - near); float d = -(2.0F * far * near) / (far - near); float e = -1.0F; Matrix4x4 m = new Matrix4x4(); m[0, 0] = x; m[0, 1] = 0; m[0, 2] = a; m[0, 3] = 0; m[1, 0] = 0; m[1, 1] = y; m[1, 2] = b; m[1, 3] = 0; m[2, 0] = 0; m[2, 1] = 0; m[2, 2] = c; m[2, 3] = d; m[3, 0] = 0; m[3, 1] = 0; m[3, 2] = e; m[3, 3] = 0; return m; } }
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