MREdustryXR/Assets/Scripts/GetAllBounds.cs

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;
    }

  
}