Unity一个弹痕的简单实现方法

Color[] c = tex.GetPixels(0, 0, 5, 5);
tex.SetPixels((int)pixelUV.x,(int)pixelUV.y,5,5,c);

            //
             Write black pixels onto the GameObject that is located

            //
             by the script. The script is attached to the camera.

            //
             Determine where the collider hits and modify the texture at that point.

            //
            //
             Note that the MeshCollider on the GameObject must have Convex turned off. This allows

            //
             concave GameObjects to be included in collision in this example.

            //
            //
             Also to allow the texture to be updated by mouse button clicks it must have the Read/Write

            //
             Enabled option set to true in its Advanced import settings.
            using
             UnityEngine;

            using
             System.Collections;


            public
            class
             ExampleClass : MonoBehaviour
{
    
            public
             Camera cam;

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

    void Update()
    {
        if (!Input.GetMouseButton(0))
            return;

        RaycastHit hit;
        if (!Physics.Raycast(cam.ScreenPointToRay(Input.mousePosition), out hit))
            return;

        Renderer rend = hit.transform.GetComponent<Renderer>();
        MeshCollider meshCollider = hit.collider as MeshCollider;

        if (rend == null || rend.sharedMaterial == null || rend.sharedMaterial.mainTexture == null || meshCollider == null)
            return;

        Texture2D tex = rend.material.mainTexture as Texture2D;
        Vector2 pixelUV = hit.textureCoord;
        pixelUV.x *= tex.width;
        pixelUV.y *= tex.height;

        tex.SetPixel((int)pixelUV.x, (int)pixelUV.y, Color.black);
        tex.Apply();
    }
}