获取某个物体的实际Bounds 参数

Assets/Scenes/Test.unity

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Assets/Scenes/Test.unity.meta

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+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/GetAllBounds.cs

@@ -0,0 +1,264 @@
+
+using UnityEngine;
+/// <summary>
+///  获取某一物体的实际Bounds  参数
+///  
+///  
+/// </summary>
+public class GetAllBounds
+{
+   public static Bounds GetRendererBounds( GameObject obj)
+    {
+        Renderer[] renderers = obj.GetComponentsInChildren<Renderer>();
+       
+        Bounds bounds = new Bounds(Vector3.zero, Vector3.zero);
+        if (renderers.Length < 1)
+            return bounds;
+        bounds = new Bounds(renderers[0].transform.position, Vector3.zero);
+        float maxX = renderers[0].transform.position.x + renderers[0].bounds.size.x / 2.0f;
+        float minX = renderers[0].transform.position.x - renderers[0].bounds.size.x / 2.0f;
+        float maxY = renderers[0].transform.position.y + renderers[0].bounds.size.y / 2.0f;
+        float minY = renderers[0].transform.position.y - renderers[0].bounds.size.y / 2.0f;
+        float maxZ = renderers[0].transform.position.z + renderers[0].bounds.size.z / 2.0f;
+        float minZ = renderers[0].transform.position.z - renderers[0].bounds.size.z / 2.0f;
+
+        foreach (Renderer renderer in renderers)
+        {
+            bounds.Encapsulate(renderer.bounds);
+
+            if (maxX < renderer.transform.position.x + renderer.bounds.size.x / 2.0f)
+                maxX = renderer.transform.position.x + renderer.bounds.size.x / 2.0f;
+            if (minX > renderer.transform.position.x - renderer.bounds.size.x / 2.0f)
+                minX = renderer.transform.position.x - renderer.bounds.size.x / 2.0f;
+
+            if (maxY < renderer.transform.position.y + renderer.bounds.size.y / 2.0f)
+                maxY = renderer.transform.position.y + renderer.bounds.size.y / 2.0f;
+            if (minY > renderer.transform.position.y - renderer.bounds.size.y / 2.0f)
+                minY = renderer.transform.position.y - renderer.bounds.size.y / 2.0f;
+
+            if (maxZ < renderer.transform.position.z + renderer.bounds.size.z / 2.0f)
+                maxZ = renderer.transform.position.z + renderer.bounds.size.z / 2.0f;
+            if (minZ > renderer.transform.position.z - renderer.bounds.size.z / 2.0f)
+                minZ = renderer.transform.position.z - renderer.bounds.size.z / 2.0f;
+        }
+        bounds.center = new Vector3(maxX - (maxX - minX) / 2.0f, maxY - (maxY - minY) / 2.0f, maxZ - (maxZ - minZ) / 2.0f);
+        return bounds;
+    }
+
+    public static Bounds GetMeshFiletBounds(GameObject obj)
+    {
+        MeshFilter[] meshFilters = obj.GetComponentsInChildren<MeshFilter>();
+        Bounds bounds = new Bounds(Vector3.zero, Vector3.zero);
+        if (meshFilters.Length < 1)
+            return bounds;
+        bounds = new Bounds(meshFilters[0].transform.position, Vector3.zero);
+        Bounds meshBounds = GetMeshBounds(meshFilters[0].gameObject, meshFilters[0].mesh);
+        float maxX = meshFilters[0].transform.position.x + meshBounds.size.x / 2.0f;
+        float minX = meshFilters[0].transform.position.x - meshBounds.size.x / 2.0f;
+        float maxY = meshFilters[0].transform.position.y + meshBounds.size.y / 2.0f;
+        float minY = meshFilters[0].transform.position.y - meshBounds.size.y / 2.0f;
+        float maxZ = meshFilters[0].transform.position.z + meshBounds.size.z / 2.0f;
+        float minZ = meshFilters[0].transform.position.z - meshBounds.size.z / 2.0f;
+
+        foreach (MeshFilter meshFilter in meshFilters)
+        {
+            meshBounds = GetMeshBounds(meshFilter.gameObject, meshFilter.mesh);
+            bounds.Encapsulate(meshBounds);
+
+            if (maxX < meshFilter.transform.position.x + meshBounds.size.x / 2.0f)
+                maxX = meshFilter.transform.position.x + meshBounds.size.x / 2.0f;
+            if (minX > meshFilter.transform.position.x - meshBounds.size.x / 2.0f)
+                minX = meshFilter.transform.position.x - meshBounds.size.x / 2.0f;
+
+            if (maxY < meshFilter.transform.position.y + meshBounds.size.y / 2.0f)
+                maxY = meshFilter.transform.position.y + meshBounds.size.y / 2.0f;
+            if (minY > meshFilter.transform.position.y - meshBounds.size.y / 2.0f)
+                minY = meshFilter.transform.position.y - meshBounds.size.y / 2.0f;
+
+            if (maxZ < meshFilter.transform.position.z + meshBounds.size.z / 2.0f)
+                maxZ = meshFilter.transform.position.z + meshBounds.size.z / 2.0f;
+            if (minZ > meshFilter.transform.position.z - meshBounds.size.z / 2.0f)
+                minZ = meshFilter.transform.position.z - meshBounds.size.z / 2.0f;
+        }
+        bounds.center = new Vector3(maxX - (maxX - minX) / 2.0f, maxY - (maxY - minY) / 2.0f, maxZ - (maxZ - minZ) / 2.0f);
+        return bounds;
+    }
+
+    public static Bounds GetSkinnedMeshBounds(GameObject obj)
+    {
+        SkinnedMeshRenderer[] skinnedMeshRenderers = obj.GetComponentsInChildren<SkinnedMeshRenderer>();
+        Bounds bounds = new Bounds(Vector3.zero, Vector3.zero);
+        if (skinnedMeshRenderers.Length < 1)
+            return bounds;
+        Mesh mesh = new Mesh();
+        skinnedMeshRenderers[0].BakeMesh(mesh);
+        bounds = new Bounds(skinnedMeshRenderers[0].transform.position, Vector3.zero);
+        Bounds meshBounds = GetMeshBounds(skinnedMeshRenderers[0].gameObject, mesh);
+        float maxX = skinnedMeshRenderers[0].transform.position.x + meshBounds.size.x / 2.0f;
+        float minX = skinnedMeshRenderers[0].transform.position.x - meshBounds.size.x / 2.0f;
+        float maxY = skinnedMeshRenderers[0].transform.position.y + meshBounds.size.y / 2.0f;
+        float minY = skinnedMeshRenderers[0].transform.position.y - meshBounds.size.y / 2.0f;
+        float maxZ = skinnedMeshRenderers[0].transform.position.z + meshBounds.size.z / 2.0f;
+        float minZ = skinnedMeshRenderers[0].transform.position.z - meshBounds.size.z / 2.0f;
+
+        foreach (SkinnedMeshRenderer skinnedRenderer in skinnedMeshRenderers)
+        {
+            skinnedRenderer.BakeMesh(mesh);
+            meshBounds = GetMeshBounds(skinnedRenderer.gameObject, mesh);
+            bounds.Encapsulate(meshBounds);
+
+            if (maxX < skinnedRenderer.transform.position.x + meshBounds.size.x / 2.0f)
+                maxX = skinnedRenderer.transform.position.x + meshBounds.size.x / 2.0f;
+            if (minX > skinnedRenderer.transform.position.x - meshBounds.size.x / 2.0f)
+                minX = skinnedRenderer.transform.position.x - meshBounds.size.x / 2.0f;
+
+            if (maxY < skinnedRenderer.transform.position.y + meshBounds.size.y / 2.0f)
+                maxY = skinnedRenderer.transform.position.y + meshBounds.size.y / 2.0f;
+            if (minY > skinnedRenderer.transform.position.y - meshBounds.size.y / 2.0f)
+                minY = skinnedRenderer.transform.position.y - meshBounds.size.y / 2.0f;
+
+            if (maxZ < skinnedRenderer.transform.position.z + meshBounds.size.z / 2.0f)
+                maxZ = skinnedRenderer.transform.position.z + meshBounds.size.z / 2.0f;
+            if (minZ > skinnedRenderer.transform.position.z - meshBounds.size.z / 2.0f)
+                minZ = skinnedRenderer.transform.position.z - meshBounds.size.z / 2.0f;
+        }
+        bounds.center = new Vector3(maxX - (maxX - minX) / 2.0f, maxY - (maxY - minY) / 2.0f, maxZ - (maxZ - minZ) / 2.0f);
+        return bounds;
+    }
+
+    public static Bounds GetAllObjectBounds(GameObject obj)
+    {
+        Renderer[] renderers = obj.GetComponentsInChildren<Renderer>();
+        MeshFilter[] meshFilters = obj.GetComponentsInChildren<MeshFilter>();
+        Bounds meshBounds = new Bounds(Vector3.zero,Vector3.zero);
+        SkinnedMeshRenderer[] skinnedMeshRenderers = obj.GetComponentsInChildren<SkinnedMeshRenderer>();
+        Mesh mesh = new Mesh();
+
+        Bounds bounds = new Bounds(Vector3.zero, Vector3.zero);
+        float maxX;
+        float minX;
+        float maxY;
+        float minY;
+        float maxZ;
+        float minZ;
+        if (renderers.Length>0)
+        {
+            bounds = new Bounds(renderers[0].transform.position, Vector3.zero);
+            maxX = renderers[0].transform.position.x + renderers[0].bounds.size.x / 2.0f;
+            minX = renderers[0].transform.position.x - renderers[0].bounds.size.x / 2.0f;
+            maxY = renderers[0].transform.position.y + renderers[0].bounds.size.y / 2.0f;
+            minY = renderers[0].transform.position.y - renderers[0].bounds.size.y / 2.0f;
+            maxZ = renderers[0].transform.position.z + renderers[0].bounds.size.z / 2.0f;
+            minZ = renderers[0].transform.position.z - renderers[0].bounds.size.z / 2.0f;
+        }
+        else if( meshFilters.Length>0)
+        {
+            bounds = new Bounds(meshFilters[0].transform.position, Vector3.zero);
+            meshBounds = GetMeshBounds(meshFilters[0].gameObject, meshFilters[0].mesh);
+            maxX = meshFilters[0].transform.position.x + meshBounds.size.x / 2.0f;
+            minX = meshFilters[0].transform.position.x - meshBounds.size.x / 2.0f;
+            maxY = meshFilters[0].transform.position.y + meshBounds.size.y / 2.0f;
+            minY = meshFilters[0].transform.position.y - meshBounds.size.y / 2.0f;
+            maxZ = meshFilters[0].transform.position.z + meshBounds.size.z / 2.0f;
+            minZ = meshFilters[0].transform.position.z - meshBounds.size.z / 2.0f;
+        }
+        else if( skinnedMeshRenderers.Length>0)
+        {
+            skinnedMeshRenderers[0].BakeMesh(mesh);
+            meshBounds = GetMeshBounds(skinnedMeshRenderers[0].gameObject, mesh);
+            maxX = skinnedMeshRenderers[0].transform.position.x + meshBounds.size.x / 2.0f;
+            minX = skinnedMeshRenderers[0].transform.position.x - meshBounds.size.x / 2.0f;
+            maxY = skinnedMeshRenderers[0].transform.position.y + meshBounds.size.y / 2.0f;
+            minY = skinnedMeshRenderers[0].transform.position.y - meshBounds.size.y / 2.0f;
+            maxZ = skinnedMeshRenderers[0].transform.position.z + meshBounds.size.z / 2.0f;
+            minZ = skinnedMeshRenderers[0].transform.position.z - meshBounds.size.z / 2.0f;
+        }
+        else
+        {
+            return bounds;
+        }
+      
+
+        foreach (Renderer renderer in renderers)
+        {
+            bounds.Encapsulate(renderer.bounds);
+
+            if (maxX < renderer.transform.position.x + renderer.bounds.size.x / 2.0f)
+                maxX = renderer.transform.position.x + renderer.bounds.size.x / 2.0f;
+            if (minX > renderer.transform.position.x - renderer.bounds.size.x / 2.0f)
+                minX = renderer.transform.position.x - renderer.bounds.size.x / 2.0f;
+
+            if (maxY < renderer.transform.position.y + renderer.bounds.size.y / 2.0f)
+                maxY = renderer.transform.position.y + renderer.bounds.size.y / 2.0f;
+            if (minY > renderer.transform.position.y - renderer.bounds.size.y / 2.0f)
+                minY = renderer.transform.position.y - renderer.bounds.size.y / 2.0f;
+
+            if (maxZ < renderer.transform.position.z + renderer.bounds.size.z / 2.0f)
+                maxZ = renderer.transform.position.z + renderer.bounds.size.z / 2.0f;
+            if (minZ > renderer.transform.position.z - renderer.bounds.size.z / 2.0f)
+                minZ = renderer.transform.position.z - renderer.bounds.size.z / 2.0f;
+        }
+
+        foreach (MeshFilter meshFilter in meshFilters)
+        {
+            meshBounds = GetMeshBounds(meshFilter.gameObject, meshFilter.mesh);
+            bounds.Encapsulate(meshBounds);
+
+            if (maxX < meshFilter.transform.position.x + meshBounds.size.x / 2.0f)
+                maxX = meshFilter.transform.position.x + meshBounds.size.x / 2.0f;
+            if (minX > meshFilter.transform.position.x - meshBounds.size.x / 2.0f)
+                minX = meshFilter.transform.position.x - meshBounds.size.x / 2.0f;
+
+            if (maxY < meshFilter.transform.position.y + meshBounds.size.y / 2.0f)
+                maxY = meshFilter.transform.position.y + meshBounds.size.y / 2.0f;
+            if (minY > meshFilter.transform.position.y - meshBounds.size.y / 2.0f)
+                minY = meshFilter.transform.position.y - meshBounds.size.y / 2.0f;
+
+            if (maxZ < meshFilter.transform.position.z + meshBounds.size.z / 2.0f)
+                maxZ = meshFilter.transform.position.z + meshBounds.size.z / 2.0f;
+            if (minZ > meshFilter.transform.position.z - meshBounds.size.z / 2.0f)
+                minZ = meshFilter.transform.position.z - meshBounds.size.z / 2.0f;
+        }
+
+        foreach (SkinnedMeshRenderer skinnedRenderer in skinnedMeshRenderers)
+        {
+            skinnedRenderer.BakeMesh(mesh);
+            meshBounds = GetMeshBounds(skinnedRenderer.gameObject, mesh);
+            bounds.Encapsulate(meshBounds);
+
+            if (maxX < skinnedRenderer.transform.position.x + meshBounds.size.x / 2.0f)
+                maxX = skinnedRenderer.transform.position.x + meshBounds.size.x / 2.0f;
+            if (minX > skinnedRenderer.transform.position.x - meshBounds.size.x / 2.0f)
+                minX = skinnedRenderer.transform.position.x - meshBounds.size.x / 2.0f;
+
+            if (maxY < skinnedRenderer.transform.position.y + meshBounds.size.y / 2.0f)
+                maxY = skinnedRenderer.transform.position.y + meshBounds.size.y / 2.0f;
+            if (minY > skinnedRenderer.transform.position.y - meshBounds.size.y / 2.0f)
+                minY = skinnedRenderer.transform.position.y - meshBounds.size.y / 2.0f;
+
+            if (maxZ < skinnedRenderer.transform.position.z + meshBounds.size.z / 2.0f)
+                maxZ = skinnedRenderer.transform.position.z + meshBounds.size.z / 2.0f;
+            if (minZ > skinnedRenderer.transform.position.z - meshBounds.size.z / 2.0f)
+                minZ = skinnedRenderer.transform.position.z - meshBounds.size.z / 2.0f;
+        }
+
+        bounds.center = new Vector3(maxX - (maxX - minX) / 2.0f, maxY - (maxY - minY) / 2.0f, maxZ - (maxZ - minZ) / 2.0f);
+        return bounds;
+    }
+
+    private static Bounds GetMeshBounds(GameObject gameObject, Mesh mesh)
+    {
+        Bounds bounds = new Bounds();
+        Vector3[] vertices = mesh.vertices;
+        if (vertices.Length != 0)
+        {
+            bounds = new Bounds(gameObject.transform.TransformPoint(vertices[0]), Vector3.zero);
+            for (int index = 1; index < vertices.Length; ++index)
+                bounds.Encapsulate(gameObject.transform.TransformPoint(vertices[index]));
+        }
+
+        return bounds;
+    }
+
+  
+}

Assets/Scripts/GetAllBounds.cs.meta

@@ -0,0 +1,11 @@
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+guid: 412c5a3806c788c48b0113766c47256d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
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Assets/Scripts/TestBox.cs

@@ -0,0 +1,18 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class TestBox : MonoBehaviour
+{
+    private void Start()
+    {
+     Bounds bounds =  GetAllBounds.GetRendererBounds(gameObject);
+        GameObject obj = new GameObject("Test");
+        obj.transform.position = bounds.center;
+        obj.AddComponent<BoxCollider>().size = bounds.size;
+       // GetComponent<BoxCollider>().center = bounds.center - transform.position;
+        GetComponent<BoxCollider>().size = bounds.size;
+
+    }
+
+}

Assets/Scripts/TestBox.cs.meta

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