unity模型任意无限切割插件
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前面几篇文章都是关于3d模型切割的原理，经过3天奋战，完成了整个流程的制作，包括了滑动屏幕，切割模型的整个过程，因为这个版本目前切割出来的切口处纹理统一使用uv坐标我设定为红色，已经亲测了无限切割（只要你的机器跟得上），本文难度其实挺大的，能理解的可以将他运用到其他平台上，比如虚幻之类的，不能理解就只能直接在unity上使用了，希望使用的朋友能保留我的名字以及博客地址。如需下载完整插件，请到
http://www.demodashi.com/demo/11343.html 。效果图如下
想知道原理的可以查看这篇文章前面几篇的内容，下面是完整代码，可以直接在unity中运用的，
/* * @authors: liangjian * @desc:*/using UnityEngine;using System.Collections.Generic;using UnityEngine.EventSystems;public class TouchToPlane : MonoBehaviour { private bool m_IsClearSamePoint = false; private Vector3 m_TouchBeganPos; private Vector3 m_ClipPlaneNormal; private Vector3 m_ClipPlanePoint; // Use this for initialization void Start () { } void Update() { if (Input.GetMouseButtonDown(0)) { m_TouchBeganPos = Input.mousePosition; } else if (Input.GetMouseButtonUp(0)) { Vector3 touchBeganPoint_screen = new Vector3(m_TouchBeganPos.x, m_TouchBeganPos.y, Camera.main.nearClipPlane); Vector3 touchEndPoint_screen = new Vector3(Input.mousePosition.x, Input.mousePosition.y, Camera.main.nearClipPlane); Vector3 normalEndPoint_screen = new Vector3(m_TouchBeganPos.x, m_TouchBeganPos.y, Camera.main.nearClipPlane + 10); if(UpdateClipPlane(touchBeganPoint_screen, touchEndPoint_screen, normalEndPoint_screen)) { ClipMesh(); } } } bool UpdateClipPlane(Vector3 touchBeganPoint_sceen, Vector3 touchEndPoint_sceen, Vector3 normalEndPoint_screen) { if(Vector3.Distance(touchBeganPoint_sceen, touchEndPoint_sceen) == 0.0f) { return false; } //转世界坐标 Vector3 touchBeganPoint_world = Camera.main.ScreenToWorldPoint(touchBeganPoint_sceen); Vector3 touchEndPoint_world = Camera.main.ScreenToWorldPoint(touchEndPoint_sceen); Vector3 noramlEndPoint_world = Camera.main.ScreenToWorldPoint(normalEndPoint_screen); //世界坐标转本地坐标 Vector3 touchBeginPoint_local = transform.worldToLocalMatrix.MultiplyPoint(touchBeganPoint_world); Vector3 touchEndPoint_local = transform.worldToLocalMatrix.MultiplyPoint(touchEndPoint_world); Vector3 normalEngPoint_local = transform.worldToLocalMatrix.MultiplyPoint(noramlEndPoint_world); m_ClipPlaneNormal = Vector3.Cross(normalEngPoint_local - touchBeginPoint_local, touchEndPoint_local - touchBeginPoint_local).normalized; m_ClipPlanePoint = touchEndPoint_local; return true; } void ClipMesh() { MeshFilter mf = this.gameObject.GetComponent<MeshFilter>(); //顶点数组转顶点容器 List<Vector3> verticeList = new List<Vector3>(); int verticeCount = mf.mesh.vertices.Length; for (int verticeIndex = 0; verticeIndex < verticeCount; ++verticeIndex) { verticeList.Add(mf.mesh.vertices[verticeIndex]); } //三角形数组转三角形容器 List<int> triangleList = new List<int>(); int triangleCount = mf.mesh.triangles.Length; for (int triangleIndex = 0; triangleIndex < triangleCount; ++triangleIndex) { triangleList.Add(mf.mesh.triangles[triangleIndex]); } //uv坐标数组转uv坐标容器 List<Vector2> uvList = new List<Vector2>(); int uvCount = mf.mesh.uv.Length; for (int uvIndex = 0; uvIndex < uvCount; ++uvIndex) { uvList.Add(mf.mesh.uv[uvIndex]); } //顶点颜色数组转顶点颜色容器 List<Vector3> normalList = new List<Vector3>(); int normalCount = mf.mesh.normals.Length; for (int normalIndex = 0; normalIndex < normalCount; ++normalIndex) { normalList.Add(mf.mesh.normals[normalIndex]); } //Debug.Log("顶点数" + verticeList.Count); //Debug.Log("顶点索引数" + triangleList.Count); //检查每个三角面，是否存在两个顶点连接正好在直线上 for (int triangleIndex = 0; triangleIndex < triangleList.Count;) { //Debug.Log("次数记录"); int trianglePointIndex0 = triangleList[triangleIndex]; int trianglePointIndex1 = triangleList[triangleIndex + 1]; int trianglePointIndex2 = triangleList[triangleIndex + 2]; Vector3 trianglePointCoord0 = verticeList[trianglePointIndex0]; Vector3 trianglePointCoord1 = verticeList[trianglePointIndex1]; Vector3 trianglePointCoord2 = verticeList[trianglePointIndex2]; //0-1，1-2相连线段被切割 if(GetPointToClipPlaneDis(trianglePointCoord0)* GetPointToClipPlaneDis(trianglePointCoord1) < 0 && GetPointToClipPlaneDis(trianglePointCoord1) * GetPointToClipPlaneDis(trianglePointCoord2) < 0) { //求得0-1与切平面的交点 Vector3 newVertice01 = GetLinePlaneCrossPoint(trianglePointCoord0, trianglePointCoord1); int index01 = IsContainsVertice(verticeList, newVertice01); if (index01 == -1 || !m_IsClearSamePoint) { verticeList.Add(newVertice01); index01 = verticeList.Count - 1; float k01 = 0; if (!IsEqual(newVertice01.x, trianglePointCoord0.x) && !IsEqual(trianglePointCoord1.x, trianglePointCoord0.x)) { k01 = (newVertice01.x - trianglePointCoord0.x) / (trianglePointCoord1.x - trianglePointCoord0.x); } else if (!IsEqual(newVertice01.y, trianglePointCoord0.y) && !IsEqual(trianglePointCoord1.y, trianglePointCoord0.y)) { k01 = (newVertice01.y - trianglePointCoord0.y) / (trianglePointCoord1.y - trianglePointCoord0.y); } else { k01 = (newVertice01.z - trianglePointCoord0.z) / (trianglePointCoord1.z - trianglePointCoord0.z); } if (uvList.Count > 0) { Vector2 uv0 = uvList[trianglePointIndex0]; Vector2 uv1 = uvList[trianglePointIndex1]; float newUV_x = (uv1.x - uv0.x) * k01 + uv0.x; float newUV_y = (uv1.y - uv0.y) * k01 + uv0.y; uvList.Add(new Vector2(newUV_x, newUV_y)); //Debug.Log("纹理坐标" + uvList[uvList.Count - 1]); } //法向量 Vector3 normalX0 = normalList[trianglePointIndex0]; Vector3 normalX1 = normalList[trianglePointIndex1]; float newNoramlX01 = (normalX1.x - normalX0.x) * k01 + normalX0.x; float newNoramlY01 = (normalX1.y - normalX0.y) * k01 + normalX0.y; float newNoramlZ01 = (normalX1.z - normalX0.z) * k01 + normalX0.z; normalList.Add(new Vector3(newNoramlX01, newNoramlY01, newNoramlZ01)); } //求得1-2与切平面的交点 Vector3 newVertice12 = GetLinePlaneCrossPoint(trianglePointCoord1, trianglePointCoord2); int index12 = IsContainsVertice(verticeList, newVertice12); if (index12 == -1 || !m_IsClearSamePoint) { verticeList.Add(newVertice12); index12 = verticeList.Count - 1; float k12 = 0; if (!IsEqual(newVertice12.x, trianglePointCoord1.x) && !IsEqual(trianglePointCoord2.x, trianglePointCoord1.x)) { k12 = (newVertice12.x - trianglePointCoord1.x) / (trianglePointCoord2.x - trianglePointCoord1.x); } else if (!IsEqual(newVertice12.y, trianglePointCoord1.y) && !IsEqual(trianglePointCoord2.y, trianglePointCoord1.y)) { k12 = (newVertice12.y - trianglePointCoord1.y) / (trianglePointCoord2.y - trianglePointCoord1.y); } else { k12 = (newVertice12.z - trianglePointCoord1.z) / (trianglePointCoord2.z - trianglePointCoord1.z); } if (uvList.Count > 0) { Vector2 uv1 = uvList[trianglePointIndex1]; Vector2 uv2 = uvList[trianglePointIndex2]; float newUV_x = (uv2.x - uv1.x) * k12 + uv1.x; float newUV_y = (uv2.y - uv1.y) * k12 + uv1.y; uvList.Add(new Vector2(newUV_x, newUV_y)); //Debug.Log("纹理坐标" + uvList[uvList.Count - 1]); } //法向量 Vector3 normalX1 = normalList[trianglePointIndex1]; Vector3 normalX2 = normalList[trianglePointIndex2]; float newNoramlX12 = (normalX2.x - normalX1.x) * k12 + normalX1.x; float newNoramlY12 = (normalX2.y - normalX1.y) * k12 + normalX1.y; float newNoramlZ12 = (normalX2.z - normalX1.z) * k12 + normalX1.z; normalList.Add(new Vector3(newNoramlX12, newNoramlY12, newNoramlZ12)); } //插入顶点索引，以此构建新三角形 triangleList.Insert(triangleIndex + 1, index01); triangleList.Insert(triangleIndex + 2, index12); triangleList.Insert(triangleIndex + 3, index12); triangleList.Insert(triangleIndex + 4, index01); triangleList.Insert(triangleIndex + 6, trianglePointIndex0); triangleList.Insert(triangleIndex + 7, index12); triangleIndex += 9; } //1-2，2-0相连线段被切割 else if (GetPointToClipPlaneDis(trianglePointCoord1) * GetPointToClipPlaneDis(trianglePointCoord2) < 0 && GetPointToClipPlaneDis(trianglePointCoord2) * GetPointToClipPlaneDis(trianglePointCoord0) < 0) { //求得1-2与切平面的交点 Vector3 newVertice12 = GetLinePlaneCrossPoint(trianglePointCoord1, trianglePointCoord2); int index12 = IsContainsVertice(verticeList, newVertice12); if (index12 == -1 || !m_IsClearSamePoint) { verticeList.Add(newVertice12); index12 = verticeList.Count - 1; float k12 = 0; if(!IsEqual(newVertice12.x, trianglePointCoord1.x) && !IsEqual(trianglePointCoord2.x, trianglePointCoord1.x)) { k12 = (newVertice12.x - trianglePointCoord1.x) / (trianglePointCoord2.x - trianglePointCoord1.x); } else if (!IsEqual(newVertice12.y, trianglePointCoord1.y) && !IsEqual(trianglePointCoord2.y, trianglePointCoord1.y)) { k12 = (newVertice12.y - trianglePointCoord1.y) / (trianglePointCoord2.y - trianglePointCoord1.y); } else { k12 = (newVertice12.z - trianglePointCoord1.z) / (trianglePointCoord2.z - trianglePointCoord1.z); } if (uvList.Count > 0) { Vector2 uv1 = uvList[trianglePointIndex1]; Vector2 uv2 = uvList[trianglePointIndex2]; float newUV_x = (uv2.x - uv1.x) * k12 + uv1.x; float newUV_y = (uv2.y - uv1.y) * k12 + uv1.y; uvList.Add(new Vector2(newUV_x, newUV_y)); //Debug.Log("纹理坐标" + uvList[uvList.Count - 1]); } //法向量 Vector3 normalX1 = normalList[trianglePointIndex1]; Vector3 normalX2 = normalList[trianglePointIndex2]; float newNoramlX12 = (normalX2.x - normalX1.x) * k12 + normalX1.x; float newNoramlY12 = (normalX2.y - normalX1.y) * k12 + normalX1.y; float newNoramlZ12 = (normalX2.z - normalX1.z) * k12 + normalX1.z; normalList.Add(new Vector3(newNoramlX12, newNoramlY12, newNoramlZ12)); } //求得0-2与切平面的交点 Vector3 newVertice02 = GetLinePlaneCrossPoint(trianglePointCoord0, trianglePointCoord2); int index02 = IsContainsVertice(verticeList, newVertice02); if (index02 == -1 || !m_IsClearSamePoint) { verticeList.Add(newVertice02); index02 = verticeList.Count - 1; float k02 = 0; if (!IsEqual(newVertice02.x, trianglePointCoord0.x) && !IsEqual(trianglePointCoord2.x, trianglePointCoord0.x)) { k02 = (newVertice02.x - trianglePointCoord0.x) / (trianglePointCoord2.x - trianglePointCoord0.x); } else if (!IsEqual(newVertice02.y, trianglePointCoord0.y) && !IsEqual(trianglePointCoord2.y, trianglePointCoord0.y)) { k02 = (newVertice02.y - trianglePointCoord0.y) / (trianglePointCoord2.y - trianglePointCoord0.y); } else { k02 = (newVertice02.z - trianglePointCoord0.z) / (trianglePointCoord2.z - trianglePointCoord0.z); } if (uvList.Count > 0) { Vector2 uv0 = uvList[trianglePointIndex0]; Vector2 uv2 = uvList[trianglePointIndex2]; float newUV_x = (uv2.x - uv0.x) * k02 + uv0.x; float newUV_y = (uv2.y - uv0.y) * k02 + uv0.y; uvList.Add(new Vector2(newUV_x, newUV_y)); //Debug.Log("纹理坐标" + uvList[uvList.Count - 1]); } //法向量 Vector3 normalX0 = normalList[trianglePointIndex0]; Vector3 normalX2 = normalList[trianglePointIndex2]; float newNoramlX02 = (normalX2.x - normalX0.x) * k02 + normalX0.x; float newNoramlY02 = (normalX2.y - normalX0.y) * k02 + normalX0.y; float newNoramlZ02 = (normalX2.z - normalX0.z) * k02 + normalX0.z; normalList.Add(new Vector3(newNoramlX02, newNoramlY02, newNoramlZ02)); } //插入顶点索引，以此构建新三角形 //{0} //{1} triangleList.Insert(triangleIndex + 2, index12); triangleList.Insert(triangleIndex + 3, index02); triangleList.Insert(triangleIndex + 4, index12); //{2} triangleList.Insert(triangleIndex + 6, index02); triangleList.Insert(triangleIndex + 7, trianglePointIndex0); triangleList.Insert(triangleIndex + 8, index12); triangleIndex += 9; } //0-1，2-0相连线段被切割 else if (GetPointToClipPlaneDis(trianglePointCoord0) * GetPointToClipPlaneDis(trianglePointCoord1) < 0 && GetPointToClipPlaneDis(trianglePointCoord2) * GetPointToClipPlaneDis(trianglePointCoord0) < 0) { //求得0-1与切平面的交点 Vector3 newVertice01 = GetLinePlaneCrossPoint(trianglePointCoord0, trianglePointCoord1); int index01 = IsContainsVertice(verticeList, newVertice01); if (index01 == -1 || !m_IsClearSamePoint) { verticeList.Add(newVertice01); index01 = verticeList.Count - 1; float k01 = 0; if (!IsEqual(newVertice01.x, trianglePointCoord0.x) && !IsEqual(trianglePointCoord1.x, trianglePointCoord0.x)) { k01 = (newVertice01.x - trianglePointCoord0.x) / (trianglePointCoord1.x - trianglePointCoord0.x); } else if(!IsEqual(newVertice01.y, trianglePointCoord0.y) && !IsEqual(trianglePointCoord1.y, trianglePointCoord0.y)) { k01 = (newVertice01.y - trianglePointCoord0.y) / (trianglePointCoord1.y - trianglePointCoord0.y); } else { k01 = (newVertice01.z - trianglePointCoord0.z) / (trianglePointCoord1.z - trianglePointCoord0.z); } if (uvList.Count > 0) { Vector2 uv0 = uvList[trianglePointIndex0]; Vector2 uv1 = uvList[trianglePointIndex1]; float newUV_x = (uv1.x - uv0.x) * k01 + uv0.x; float newUV_y = (uv1.y - uv0.y) * k01 + uv0.y; uvList.Add(new Vector2(newUV_x, newUV_y)); Debug.Log("纹理坐标" + uvList[uvList.Count - 1]); } //法向量 Vector3 normalX0 = normalList[trianglePointIndex0]; Vector3 normalX1 = normalList[trianglePointIndex1]; float newNoramlX01 = (normalX1.x - normalX0.x) * k01 + normalX0.x; float newNoramlY01 = (normalX1.y - normalX0.y) * k01 + normalX0.y; float newNoramlZ01 = (normalX1.z - normalX0.z) * k01 + normalX0.z; normalList.Add(new Vector3(newNoramlX01, newNoramlY01, newNoramlZ01)); } //求得0-2与切平面的交点 Vector3 newVertice02 = GetLinePlaneCrossPoint(trianglePointCoord0, trianglePointCoord2); int index02 = IsContainsVertice(verticeList, newVertice02); if (index02 == -1 || !m_IsClearSamePoint) { verticeList.Add(newVertice02); index02 = verticeList.Count - 1; float k02 = 0; if (!IsEqual(newVertice02.x, trianglePointCoord0.x) && !IsEqual(trianglePointCoord2.x, trianglePointCoord0.x)) { k02 = (newVertice02.x - trianglePointCoord0.x) / (trianglePointCoord2.x - trianglePointCoord0.x); } else if(!IsEqual(newVertice02.y, trianglePointCoord0.y) && !IsEqual(trianglePointCoord2.y, trianglePointCoord0.y)) { k02 = (newVertice02.y - trianglePointCoord0.y) / (trianglePointCoord2.y - trianglePointCoord0.y); } else { k02 = (newVertice02.z - trianglePointCoord0.z) / (trianglePointCoord2.z - trianglePointCoord0.z); } if (uvList.Count > 0) { Vector2 uv0 = uvList[trianglePointIndex0]; Vector2 uv2 = uvList[trianglePointIndex2]; float newUV_x = (uv2.x - uv0.x) * k02 + uv0.x; float newUV_y = (uv2.y - uv0.y) * k02 + uv0.y; uvList.Add(new Vector2(newUV_x, newUV_y)); Debug.Log("纹理坐标" + uvList[uvList.Count - 1]); } //法向量 Vector3 normalX0 = normalList[trianglePointIndex0]; Vector3 normalX2 = normalList[trianglePointIndex2]; float newNoramlX02 = (normalX2.x - normalX0.x) * k02 + normalX0.x; float newNoramlY02 = (normalX2.y - normalX0.y) * k02 + normalX0.y; float newNoramlZ02 = (normalX2.z - normalX0.z) * k02 + normalX0.z; normalList.Add(new Vector3(newNoramlX02, newNoramlY02, newNoramlZ02)); } //插入顶点索引，以此构建新三角形 //{0} triangleList.Insert(triangleIndex + 1, index01); triangleList.Insert(triangleIndex + 2, index02); triangleList.Insert(triangleIndex + 3, index01); //{1} //{2} triangleList.Insert(triangleIndex + 6, trianglePointIndex2); triangleList.Insert(triangleIndex + 7, index02); triangleList.Insert(triangleIndex + 8, index01); triangleIndex += 9; } else { triangleIndex += 3; } } //Debug.Log("顶点数" + verticeList.Count); //Debug.Log("顶点索引数" + triangleList.Count); //筛选出切割面两侧的顶点索引 List<int> triangles1 = new List<int>(); List<int> triangles2 = new List<int>(); for (int triangleIndex = 0; triangleIndex < triangleList.Count; triangleIndex += 3) { int trianglePoint0 = triangleList[triangleIndex]; int trianglePoint1 = triangleList[triangleIndex + 1]; int trianglePoint2 = triangleList[triangleIndex + 2]; Vector3 point0 = verticeList[trianglePoint0]; Vector3 point1 = verticeList[trianglePoint1]; Vector3 point2 = verticeList[trianglePoint2]; //切割面 float dis0 = GetPointToClipPlaneDis(point0); float dis1 = GetPointToClipPlaneDis(point1); float dis2 = GetPointToClipPlaneDis(point2); if ((dis0 < 0 || IsEqual(dis0, 0)) && (dis1 < 0 || IsEqual(dis1, 0)) && (dis2 < 0 || IsEqual(dis2, 0))) { triangles1.Add(trianglePoint0); triangles1.Add(trianglePoint1); triangles1.Add(trianglePoint2); } else { triangles2.Add(trianglePoint0); triangles2.Add(trianglePoint1); triangles2.Add(trianglePoint2); } } //新生顶点数 int newVerticeCount = verticeList.Count - verticeCount; //再次添加一遍新增顶点，用于缝合切口 for (int newVerticeIndex = 0; newVerticeIndex < newVerticeCount; ++newVerticeIndex) { Vector3 newVertice = verticeList[verticeCount + newVerticeIndex]; Vector3 qiekouVertice = new Vector3(newVertice.x, newVertice.y, newVertice.z); verticeList.Add(qiekouVertice); //uv if (uvList.Count > 0) { Vector2 newUv = uvList[verticeCount + newVerticeIndex]; Vector2 qiekouUv = new Vector3(0.99f, 0.99f); uvList.Add(qiekouUv); } //法线 Vector3 newNormal = normalList[verticeCount + newVerticeIndex]; Vector3 qiekouNormal = new Vector3(newNormal.x, newNormal.y, newNormal.z); normalList.Add(qiekouNormal); } verticeCount = verticeCount + newVerticeCount; //重新排序新生成的顶点,按照角度 List<SortAngle> SortAngleList = new List<SortAngle>(); for (int verticeIndex = verticeCount + 1; verticeIndex < verticeList.Count; verticeIndex++) { //计算角度,以0-1为参照 Vector3 vec1to0 = verticeList[verticeCount + 1] - verticeList[verticeCount]; Vector3 indexTo0 = verticeList[verticeIndex] - verticeList[verticeCount]; float moIndexto0 = indexTo0.magnitude; float mo1to0 = vec1to0.magnitude; float dotRes = Vector3.Dot(indexTo0, vec1to0); if (moIndexto0 == 0.0f) { continue; } float angle = Mathf.Acos(dotRes / (mo1to0 * moIndexto0)); //Vector3.Angle(indexTo0.normalized, vec1to0.normalized); bool isExis = false; for (int i = 0; i < SortAngleList.Count; ++i) { //同样角度，距离近的被剔除 if (Mathf.Abs(SortAngleList[i].Angle * 180.0f / Mathf.PI - angle * 180.0f / Mathf.PI) < 0.1f) { float dis1 = Vector3.Distance(verticeList[SortAngleList[i].Index], verticeList[verticeCount]); float dis2 = Vector3.Distance(verticeList[verticeIndex], verticeList[verticeCount]); if (dis2 >= dis1) { SortAngleList[i].Index = verticeIndex; } isExis = true; break; } } if (!isExis) { //Debug.Log(angle); SortAngle sortAngle = new SortAngle(); sortAngle.Index = verticeIndex; sortAngle.Angle = angle; SortAngleList.Add(sortAngle); } } SortAngleList.Sort(); //缝合切口 for (int verticeIndex = 0; verticeIndex < SortAngleList.Count - 1;) { triangles1.Add(SortAngleList[verticeIndex + 1].Index); triangles1.Add(SortAngleList[verticeIndex].Index); triangles1.Add(verticeCount); triangles2.Add(verticeCount); triangles2.Add(SortAngleList[verticeIndex].Index); triangles2.Add(SortAngleList[verticeIndex + 1].Index); verticeIndex++; } mf.mesh.vertices = verticeList.ToArray(); mf.mesh.triangles = triangles1.ToArray(); if (uvList.Count > 0) { mf.mesh.uv = uvList.ToArray(); } mf.mesh.normals = normalList.ToArray(); //分割模型 GameObject newModel = new GameObject("New Model"); MeshFilter meshFilter = newModel.AddComponent<MeshFilter>(); meshFilter.mesh.vertices = mf.mesh.vertices; meshFilter.mesh.triangles = triangles2.ToArray(); meshFilter.mesh.uv = mf.mesh.uv; meshFilter.mesh.normals = mf.mesh.normals; Renderer newRenderer = newModel.AddComponent<MeshRenderer>(); newRenderer.material = this.gameObject.GetComponent<MeshRenderer>().material; newModel.transform.localPosition = transform.localPosition; newModel.AddComponent<TouchToPlane>(); } float GetPointToClipPlaneDis(Vector3 point) { return Vector3.Dot((point - m_ClipPlanePoint), m_ClipPlaneNormal); } Vector3 GetLinePlaneCrossPoint(Vector3 lineBegin, Vector3 lineEnd) { //Debug.Log("起点：" + lineBegin + "," + "终点：" + lineEnd); float x = 0; float y = 0; float z = 0; float offsetZ = lineEnd.z - lineBegin.z; float offsetY = lineEnd.y - lineBegin.y; if (offsetZ != 0) { float k1 = (m_ClipPlaneNormal.x * (lineEnd.x - lineBegin.x) + m_ClipPlaneNormal.y * (lineEnd.y - lineBegin.y)) / offsetZ + m_ClipPlaneNormal.z; float k2 = (m_ClipPlaneNormal.x * lineBegin.z * (lineEnd.x - lineBegin.x) + m_ClipPlaneNormal.y * lineBegin.z * (lineEnd.y - lineBegin.y)) / offsetZ; float k3 = m_ClipPlaneNormal.x * lineBegin.x - m_ClipPlaneNormal.x * m_ClipPlanePoint.x + m_ClipPlaneNormal.y * lineBegin.y - m_ClipPlaneNormal.y * m_ClipPlanePoint.y - m_ClipPlaneNormal.z * m_ClipPlanePoint.z; z = (k2 - k3) / k1; x = (z - lineBegin.z) * (lineEnd.x - lineBegin.x) / offsetZ + lineBegin.x; y = (z - lineBegin.z) * (lineEnd.y - lineBegin.y) / offsetZ + lineBegin.y; } else if(offsetY != 0) { z = lineBegin.z; float k1 = m_ClipPlaneNormal.y + m_ClipPlaneNormal.x * (lineEnd.x - lineBegin.x) / (lineEnd.y - lineBegin.y); float k2 = m_ClipPlaneNormal.x * lineBegin.y * (lineEnd.x - lineBegin.x) / (lineEnd.y - lineBegin.y); float k3 = lineBegin.x* m_ClipPlaneNormal.x - m_ClipPlanePoint.x * m_ClipPlaneNormal.x - m_ClipPlaneNormal.y * m_ClipPlanePoint.y + m_ClipPlaneNormal.z * z - m_ClipPlaneNormal.z * m_ClipPlanePoint.z; y = (k2 - k3) / k1; x = (y - lineBegin.y) * (lineEnd.x - lineBegin.x) / (lineEnd.y - lineBegin.y) + lineBegin.x; } else { z = lineBegin.z; y = lineBegin.y; x = (m_ClipPlaneNormal.x * m_ClipPlanePoint.x - m_ClipPlaneNormal.y * (y - m_ClipPlanePoint.y) - m_ClipPlaneNormal.z * (z - m_ClipPlanePoint.z)) / m_ClipPlaneNormal.x; } // Debug.Log(x + "," + y + "," + z); return new Vector3(x, y, z); } int IsContainsVertice(List<Vector3> list, Vector3 vertice) { int count = list.Count; for(int i = 0; i < count; ++i) { Vector3 ii = list[i]; if (IsEqual(ii.x, vertice.x) && IsEqual(ii.y, vertice.y) && IsEqual(ii.z, vertice.z)) { return i; } } return -1; } bool IsEqual(float num1, float num2) { float absX = Mathf.Abs(num1 - num2); return absX < 0.00001f; }}/* * @authors: liangjian * @desc:*/using UnityEngine;using System.Collections;using System;public class SortAngle : IComparable<SortAngle> { public int Index; public float Angle; public int CompareTo(SortAngle item) { return item.Angle.CompareTo(Angle); }}
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