unity---Mesh网格编程（四）

1.绘制一个圆角正方体

2.代码

unity---Mesh网格编程（三）这里说了Mesh绘制一个正方体或立方体

1.绘制一个圆角正方体

2.代码

//X、Y、Z轴正方体数量足够多的偶数 半径取X的一半。 也可绘制出圆形using System.Collections;
using UnityEngine;//脚本挂载到物体时自动添加 MeshFilter 与 MeshRenderer 组件
[RequireComponent(typeof(MeshFilter), typeof(MeshRenderer))]
public class Mesh4 : MonoBehaviour
{//x轴正方体数量、y轴正方体数量、Z轴正方体数量public int xGridCount, yGridCount, zGridCount;//圆角半径public float _r;private Vector3[] _vertices;private int[] _triangles;private int _t = 0, _v = 0;private Vector3[] _normals;void Start(){Mesh mesh = new Mesh();MeshFilter filter = GetComponent<MeshFilter>();filter.mesh = mesh;mesh.name = "Mesh4";StartCoroutine(GenerateMesh(mesh));}private IEnumerator GenerateMesh(Mesh mesh){yield return StartCoroutine(GenerateVextex());_normals = new Vector3[_vertices.Length];Vector3 inner;for (int i = 0; i < _vertices.Length; i++){inner = SetNormal(i);ResetVextexPos(i, inner);}mesh.vertices = _vertices;yield return StartCoroutine(GenerateTriange(mesh));}//计算顶点数private int GetVextexCount(){//公共-顶点数int connerVertexCount = 8;//边--顶点数int edgeVertexCount = (xGridCount + yGridCount + zGridCount - 3) * 4;//内部顶点数int faceVertexCount = (xGridCount - 1) * (yGridCount - 1) * 2+ (zGridCount - 1) * (yGridCount - 1) * 2+ (xGridCount - 1) * (zGridCount - 1) * 2;return connerVertexCount + edgeVertexCount + faceVertexCount;}//生成顶点private IEnumerator GenerateVextex(){_vertices = new Vector3[GetVextexCount()];int index = 0;//循环生成左右前后4个面的顶点for (int y = 0; y < yGridCount + 1; y++){//循环生成左右前后4个面的顶点for (int x = 0; x < xGridCount + 1; x++, index++){_vertices[index] = new Vector3(x, y, 0);yield return null;}//底部正方形-第二条边的顶点for (int z = 1; z < zGridCount + 1; z++, index++){_vertices[index] = new Vector3(xGridCount, y, z);yield return null;}//底部正方形-第三条边的顶点for (int x = xGridCount - 1; x >= 0; x--, index++){_vertices[index] = new Vector3(x, y, zGridCount);yield return null;}//底部正方形-第四条边的顶点for (int z = zGridCount - 1; z > 0; z--, index++){_vertices[index] = new Vector3(0, y, z);yield return null;}}//生成上面的顶点for (int z = 1; z < zGridCount; z++){for (int x = 1; x < xGridCount; x++, index++){_vertices[index] = new Vector3(x, yGridCount, z);yield return null;}}//生成下面的顶点for (int z = 1; z < zGridCount; z++){for (int x = 1; x < xGridCount; x++, index++){_vertices[index] = new Vector3(x, 0, z);yield return null;}}}//计算顶点序列下标数private int GetTriangeCount(){return xGridCount * yGridCount * 4 + xGridCount * zGridCount * 4 + yGridCount * zGridCount * 4;}//顶点绘制三角面序列private IEnumerator GenerateTriange(Mesh mesh){_triangles = new int[GetTriangeCount() * 3];int circleVextexCount = 2 * xGridCount + 2 * zGridCount;yield return StartCoroutine(GenerateSide(mesh, circleVextexCount));yield return StartCoroutine(GenerateTop(mesh, circleVextexCount));yield return StartCoroutine(GenerateBottom(mesh, circleVextexCount));}private IEnumerator GenerateSide(Mesh mesh, int circleVextexCount){for (int y = 0; y < yGridCount; y++){for (int i = 0; i < circleVextexCount; i++, _v++, _t += 6){SetQuad(_triangles, _t, _v, _v + 1, _v + circleVextexCount, _v + 1 + circleVextexCount, circleVextexCount);mesh.triangles = _triangles;yield return null;}}}private IEnumerator GenerateTop(Mesh mesh, int circleVextexCount){//第一行前三个面for (int x = 0; x < xGridCount - 1; x++, _v++, _t += 6){SetQuad(_triangles, _t, _v, _v + 1, _v + circleVextexCount - 1, _v + circleVextexCount);mesh.triangles = _triangles;yield return null;}//第一行第四个面SetQuad(_triangles, _t, _v, _v + 1, _v + circleVextexCount - 1, _v + 2);mesh.triangles = _triangles;_t += 6;yield return null;int vMin = circleVextexCount * (yGridCount + 1) - 1;int vMid = vMin + 1;int vMax = _v + 2;//中间行所有面for (int z = 0; z < zGridCount - 2; z++, vMin--, vMid++, vMax++){//第一个面SetQuad(_triangles, _t, vMin, vMid, vMin - 1, vMid + xGridCount);mesh.triangles = _triangles;_t += 6;yield return null;//中间面片for (int i = 0; i < xGridCount - 2; i++, _t += 6, vMid++){SetQuad(_triangles, _t, vMid, vMid + 1, vMid + xGridCount - 1, vMid + xGridCount);mesh.triangles = _triangles;yield return null;}//最后一个面SetQuad(_triangles, _t, vMid, vMax, vMid + xGridCount - 1, vMax + 1);mesh.triangles = _triangles;_t += 6;yield return null;}int vTop = vMin - 2;//第一个面SetQuad(_triangles, _t, vMin, vMid, vMin - 1, vTop);mesh.triangles = _triangles;_t += 6;yield return null;for (int i = 0; i < xGridCount - 2; i++, vMid++, vTop--){//中间面SetQuad(_triangles, _t, vMid, vMid + 1, vTop, vTop - 1);mesh.triangles = _triangles;_t += 6;yield return null;}//最后一行最后一个面SetQuad(_triangles, _t, vMid, vTop - 2, vTop, vTop - 1);mesh.triangles = _triangles;_t += 6;yield return null;}private IEnumerator GenerateBottom(Mesh mesh, int circleVextexCount){int vMin = circleVextexCount - 1;int vMid = _vertices.Length - (xGridCount - 1) * (zGridCount - 1);//第一行，第一面SetQuad(_triangles, _t, vMin, vMid, 0, 1);_t += 6;mesh.triangles = _triangles;yield return null;int vMax = 1;//第一行，中间面for (int i = 0; i < xGridCount - 2; i++, _t += 6, vMax++, vMid++){SetQuad(_triangles, _t, vMid, vMid + 1, vMax, vMax + 1);mesh.triangles = _triangles;yield return null;}//第一行，最后面SetQuad(_triangles, _t, vMid, vMax + 2, vMax, vMax + 1);_t += 6;mesh.triangles = _triangles;yield return null;vMid++;vMax += 2;for (int z = 0; z < zGridCount - 2; z++, vMin--, vMid++, vMax++){//第一面SetQuad(_triangles, _t, vMin - 1, vMid, vMin, vMid - xGridCount + 1);_t += 6;mesh.triangles = _triangles;yield return null;//中间面for (int i = 0; i < xGridCount - 2; i++, _t += 6, vMid++){SetQuad(_triangles, _t, vMid, vMid + 1, vMid - xGridCount + 1, vMid - xGridCount + 2);mesh.triangles = _triangles;yield return null;}//最后面SetQuad(_triangles, _t, vMid, vMax + 1, vMid - xGridCount + 1, vMax);_t += 6;mesh.triangles = _triangles;yield return null;}vMid = vMid - xGridCount + 1;//最后行，第一面SetQuad(_triangles, _t, vMin - 1, vMin - 2, vMin, vMid);_t += 6;mesh.triangles = _triangles;yield return null;int vBottom = vMin - 2;//最后行，中间面for (int i = 0; i < xGridCount - 2; i++, _t += 6, vBottom--, vMid++){SetQuad(_triangles, _t, vBottom, vBottom - 1, vMid, vMid + 1);mesh.triangles = _triangles;yield return null;}//最后行，最后面SetQuad(_triangles, _t, vBottom, vBottom - 1, vMid, vBottom - 2);_t += 6;mesh.triangles = _triangles;yield return null;}private void SetQuad(int[] triangles, int i, int v00, int v10, int v01, int v11, int circleVextexCount){v10 = (v00 / circleVextexCount) * circleVextexCount + v10 % circleVextexCount;v11 = (v01 / circleVextexCount) * circleVextexCount + v11 % circleVextexCount;SetQuad(triangles, i, v00, v10, v01, v11);}//每个面片 6个顶点下标序列private void SetQuad(int[] triangles, int i, int v00, int v10, int v01, int v11){//第1个三角面triangles[i] = v00;triangles[i + 1] = v01;triangles[i + 2] = v10;//第2个三角面triangles[i + 3] = v01;triangles[i + 4] = v11;triangles[i + 5] = v10;}//圆角四边形部分逻辑private Vector3 SetNormal(int i){var vextex = _vertices[i];var inner = vextex;if (vextex.x < _r){inner.x = _r;}else if (vextex.x > xGridCount - _r){inner.x = xGridCount - _r;}if (vextex.y < _r){inner.y = _r;}else if (vextex.y > yGridCount - _r){inner.y = yGridCount - _r;}if (vextex.z < _r){inner.z = _r;}else if (vextex.z > zGridCount - _r){inner.z = zGridCount - _r;}_normals[i] = (vextex - inner).normalized;return inner;}private void ResetVextexPos(int i, Vector3 inner){_vertices[i] = _normals[i] * _r + inner;}
}

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unity---Mesh网格编程（四）

1.绘制一个圆角正方体

2.代码

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