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47 lines
1.5 KiB
C#
47 lines
1.5 KiB
C#
using System;
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using UnityEngine;
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[ExecuteInEditMode]
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public class DecalProjectorTest : MonoBehaviour
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{
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public GameObject target = null;
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public Material targetMaterial = null;
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public MeshRenderer targetRenderer;
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public float aspectRatio = 1.0f;
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public float size = 1.0f;
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public float factor = 1.0f;
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private Matrix4x4 _projectionMatrix;
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private Matrix4x4 _OrthoMatrix;
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private int _matrixID;
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private int _normalID;
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public int _tangentID;
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// Start is called before the first frame update
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void Awake()
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{
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_projectionMatrix = Matrix4x4.identity;
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targetRenderer = target.GetComponent<MeshRenderer>();
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}
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// Update is called once per frame
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void Update()
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{
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Vector3 pos =new Vector3( 0.5f ,0.5f, 0);
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Vector3 scale = new Vector3(1 / size, 1 / (aspectRatio * size), 1);
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_OrthoMatrix.SetTRS(pos, Quaternion.identity, scale);
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//Debug.Log(_OrthoMatrix);
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var targetToProjector = transform.worldToLocalMatrix * targetRenderer.localToWorldMatrix;
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var projectorToTarget = targetRenderer.worldToLocalMatrix * transform.localToWorldMatrix;
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_projectionMatrix = _OrthoMatrix * targetToProjector;
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targetMaterial.SetMatrix("_ProjectionMatrix", _projectionMatrix);
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targetMaterial.SetVector("_DecalNormal", projectorToTarget.MultiplyVector(Vector3.back).normalized);
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targetMaterial.SetVector("_DecalTangent", projectorToTarget.MultiplyVector(Vector3.right).normalized);
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}
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}
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