新增unity的牛逼shader和熊猫超级shader

Unity C++脚本/NBShader/NB_FX/NBShaders/Runtime/NBShaderSpriteHelper.cs

@@ -0,0 +1,91 @@
+using UnityEngine;
+using UnityEngine.UI;
+// using Sirenix.OdinInspector;
+namespace NBShader
+{
+    [ExecuteAlways]
+    public class NBShaderSpriteHelper : MonoBehaviour
+    {
+        public Sprite sprite;
+
+        // [ReadOnly]
+        public SpriteRenderer spRenderer;
+
+        // [ReadOnly]
+        public Image image;
+
+        [InspectorButton("初始化", "Init")] public bool ButtomInspector;
+
+        private Material mat;
+
+
+
+        // Start is called before the first frame update
+        void Start()
+        {
+            Init();
+        }
+
+        void Init()
+        {
+            if (TryGetComponent<SpriteRenderer>(out SpriteRenderer spr))
+            {
+                spRenderer = spr;
+                sprite = spr.sprite;
+            }
+            else
+            {
+                if (TryGetComponent<Image>(out Image im))
+                {
+                    image = im;
+                    sprite = im.sprite;
+                }
+            }
+
+
+
+            if (sprite)
+            {
+                Texture texture = sprite.texture;
+                Rect rect = sprite.textureRect;
+                // sharedMaterial.SetVector("_BaseMapReverseST",CalScaleOffset(spRenderer.sprite.textureRect,spRenderer.sprite.texture));
+
+                if (spRenderer)
+                {
+                    if (Application.isPlaying)
+                    {
+                        mat = spRenderer.material;
+                    }
+                    else
+                    {
+                        mat = spRenderer.sharedMaterial;
+                    }
+                }
+                else if (image)
+                {
+                    mat = image.material;
+                }
+
+                if (mat && mat.shader.name == "Effects/NBShader")
+                {
+                    mat.SetVector("_MainTex_Reverse_ST", CalScaleOffset(rect, texture));
+                    Debug.Log(mat.name);
+                }
+            }
+
+
+
+        }
+
+        Vector4 CalScaleOffset(Rect textureRect, Texture texture)
+        {
+            //这是一个反向的scale offset。
+            //算法：如果原scale offset。转换后会是 scaleAfter= 1 / scale , offsetAfter = - offset/scale;
+            Vector2 scaleAfter = new Vector2(texture.width / textureRect.width, texture.height / textureRect.height);
+            Vector2 offsetAfter = new Vector2(-(textureRect.x / texture.width) * scaleAfter.x,
+                -(textureRect.y / texture.height) * scaleAfter.y);
+            Vector4 scaleOffset = new Vector4(scaleAfter.x, scaleAfter.y, offsetAfter.x, offsetAfter.y);
+            return scaleOffset;
+        }
+    }
+}