代码手绘圆柱体，draw cylinder in unity

资源大湿 · 发表于 2020-4-3 15:31

可自定义半径、厚度、边数

using System;
using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
using LitJson;
#endif
using System.Collections;
using System.Collections.Generic;
using System.Runtime;
using UnityEngine.Experimental.U2D;
[RequireComponent(typeof(MeshFilter))]
[RequireComponent(typeof(MeshRenderer))]
public class DeformReel : MonoBehaviour
{
//老虎机转轮半径
public float radius = 1;
//老虎机轮子宽度
public float width = 1;
//老虎机轮子几个边
public int side = 8;
//轮子是否镂空系数
public float thickness = 0;
// Start is called before the first frame update
void Start()
{
Main();
}
// Update is called once per frame
void Update()
{
}
void OnValidate()
{
Main();
}
void Main()
{
MeshFilter mf = this.gameObject.GetComponent<MeshFilter>();
Mesh mesh = mf.mesh;
mesh.Clear();
List<Vector3> listVertexOneDmt = new List<Vector3>();
//圆柱体
if (thickness == 0)
{
int singleIdx = 0;
for (int i = 0, lenI = (side + 1) * 2; i < lenI; i++)
{
//y z轴面的中心点
if (i == 0)
{
listVertexOneDmt.Add(new Vector3(width / 2f, 0, 0));
}
//y z轴面的从上顺时针顶点
else if (i < lenI / 2)
{
listVertexOneDmt.Add(new Vector3(width / 2f,
Mathf.Cos(360f / side * (i - 1) * Mathf.PI / 180f) * radius,
Mathf.Sin(360f / side * (i - 1) * Mathf.PI / 180f) * radius));
}
//反面的点
else
{
listVertexOneDmt.Add(new Vector3(-listVertexOneDmt[i - lenI / 2].x,
listVertexOneDmt[i - lenI / 2].y,
listVertexOneDmt[i - lenI / 2].z));
}
}
//side*4个三角形 side*4*3个点
int[] triangles = new int[side * 3 * 4];
for (int i = 0, lenI = triangles.Length; i < lenI; i++)
{
triangles[i] = 0;
}
int[] sides = new int[side + 1];
//0 1 2 3 4 5 6
for (int i = 0, lenI = sides.Length; i < lenI; i++)
{
sides[i] = i;
}
//y z轴的三角区域 6*3=18 右侧边的6个三角形参数
//[(0,1,2),(0,2,3),(0,3,4),(0,4,5),(0,5,6),(0,6,1)]
for (int i = 0, lenI = side; i < lenI; i++)
{
for (int j = 0, lenJ = 3; j < lenJ; j++)
{
if (j == 0)
{
triangles[i * 3 + j] = 0;
}
else if (j == 1)
{
triangles[i * 3 + j] = i + 1;
}
else
{
triangles[i * 3 + j] = i + 2 > side ? 1 : i + 2;
}
}
}
//7 8 9 10 11 12 13
for (int i = 0, lenI = sides.Length; i < lenI; i++)
{
sides[i] = i + side + 1;
}
//y z轴的三角区域 6*3=18 左侧边的6个三角形参数
//(7,9,8) ,(7,10,9),(7,11,10),(7,12,11),(7,13,12),(7,8,13)
for (int i = side, lenI = side * 2; i < lenI; i++)
{
for (int j = 0, lenJ = 3; j < lenJ; j++)
{
if (j==0)
{
triangles[i * 3 + j] = side+1;
}
else if (j==1)
{
triangles[i * 3 + j] = i+3>side*2+1?side+2:i+3;
}
else
{
triangles[i * 3 + j] = i+2 ;
}
}
}
//1,2,3,4,5,6
sides = new int[side];
for (int i = 1, lenI = side; i <= lenI; i++)
{
sides[i - 1] = i;
}
//(2,1,8) (3,2,9) (4,3,10) (5,4,11) (6,5,12) (1,6,13)
for (int i = side * 2, lenI = side * 3; i < lenI; i++)
{
for (int j = 0, lenJ = 3; j < lenJ; j++)
{
if (j == 0)
{
triangles[i * 3 + j] = (i - side * 2) + 2>side?1: (i - side * 2) + 2;
}
else if(j==1)
{
triangles[i * 3 + j] = (i - side * 2) + 1;
}
else
{
triangles[i * 3 + j] = (i - side * 2) +side+2;
}
}
}
//8,9,10,11,12,13
for (int i = 1, lenI = side; i <= lenI; i++)
{
sides[i - 1] = i + side + 1;
}
//(8,9,2) (9,10,3) (10,11,4) (11,12,5) (12,13,6) (13,8,1)
for (int i = side * 3, lenI = side * 4; i < lenI; i++)
{
for (int j = 0, lenJ = 3; j < lenJ; j++)
{
if (j == 2)
{
triangles[i * 3 + j] = (i - side * 3 + 2) > (side) ? 1 : (i - side * 3 + 2);
}
else if (j == 0)
{
triangles[i * 3 + j] = i - side * 3 + side + 2;
}
else if (j == 1)
{
triangles[i * 3 + j] = (i - side * 3 + side + 3) > ((side) * 2 + 1)
? (side + 2)
: (i - side * 3 + side + 3);
}
}
}
Debug.Log(" mesh.triangles:" + JsonMapper.ToJson(triangles));
mesh.vertices = listVertexOneDmt.ToArray();
mesh.triangles = triangles;
}
// mesh.uv = uvs;
mesh.RecalculateBounds();
mesh.RecalculateNormals();
}
}

复制代码

资源大湿 · 发表于 2020-4-9 11:26

学习网站：
顶点：
https://www.youtube.com/watch?v=11c9rWRotJ8
uv:
https://www.youtube.com/watch?v=FGL6SffDeVU&t=303s

EIBEN · 发表于 2020-6-15 09:08

先下来试试看

liuqingmei · 发表于 2020-6-15 09:58

666666666~好好好

一剑飘红 · 发表于 2020-6-15 09:48

感谢楼主的分享！

tiamwan · 发表于 2020-6-15 09:41

感谢楼主的分享！

mice714 · 发表于 2020-6-15 09:49

感谢感谢感谢感谢！

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[简易教程] 代码手绘圆柱体，draw cylinder in unity

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