Unity C#生成的网格已偏移,为什么它不在正确的位置?
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互联网集市收集整理的这篇技术教程文章主要介绍了Unity C#生成的网格已偏移,为什么它不在正确的位置?,小编现在分享给大家,供广大互联网技能从业者学习和参考。文章包含2810字,纯文字阅读大概需要5分钟。
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![Unity C#生成的网格已偏移,为什么它不在正确的位置?](/upload/InfoBanner/zyjiaocheng/657/61cf73b102c64d608c085f864b38815f.jpg)
我正在尝试从脚本统一生成网格.网格是通过沿特定方向进行光线投射生成的.然后从命中点或射线终止处获得顶点.网格生成效果很好,并且运行良好,但是在附带脚本的对象上方,网格生成了大约5到10个单位.我将在下面附上我的脚本.
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class Torch : MonoBehaviour {
public GameObject lightmeshholder;
private int RaysToShoot = 128;
private float distance = 50;
private Vector3[] vertices;
private Vector2[] vertices2d;
private int[] triangles;
private Mesh mesh;
private Texture2D texture;
private int screenwidth;
private int screenheight;
private int grab = 0;
private RaycastHit hit;
// Use this for initialization
void Start () {
screenwidth = Screen.width;
screenheight = Screen.height;
texture = new Texture2D (screenwidth, screenheight, TextureFormat.RGB24, false);
vertices = new Vector3[RaysToShoot];
vertices2d = new Vector2[RaysToShoot];
triangles = new int[(RaysToShoot) +1 ];
mesh= lightmeshholder.GetComponent<MeshFilter>().mesh;
}
// Update is called once per frame
void Update () {
float angle =0;
for(int i=0;i<RaysToShoot;i++){
float x = Mathf.Sin(0);
x=-5;
if(Input.GetKey(KeyCode.P)){
x = 5;
}
float y = Mathf.Cos(angle);
if (angle <= 90){
angle += 2*Mathf.PI/RaysToShoot;
}
Vector3 dir = new Vector3(x,y,0);
if (Physics.Raycast (this.transform.position, dir,out hit, distance))
{
Debug.DrawLine (this.transform.position, hit.point,new Color(1,1,0,1));
Vector3 tmp = lightmeshholder.transform.InverseTransformPoint(hit.point);
vertices2d[i] = new Vector2(tmp.x,tmp.y);
}else{
Vector3 tmp = lightmeshholder.transform.InverseTransformPoint(this.transform.position + dir*distance);
vertices2d[i] = new Vector2(tmp.x,tmp.y);
Debug.DrawLine(this.transform.position,dir * distance,Color.red,0);
}
}
// build mesh
Vector2[] uvs = new Vector2[vertices2d.Length +1];
Vector3[] newvertices = new Vector3[vertices2d.Length+1];
for (int n = 0; n<newvertices.Length-1 ;n++)
{
if(n==0){
newvertices[0]=this.transform.position;
newvertices[1] = vertices2d[0];
uvs[0] = new Vector2(this.transform.position.x,this.transform.position.y);
uvs[1] = vertices2d[0];
}else{
newvertices[n+1] = vertices2d[n];
uvs[n+1] = vertices2d[n];
}
if(n==0){
triangles[0] = 0;
triangles[1] = 1;
triangles[2] = 2;
}else if(n<newvertices.Length/3){
triangles[n*3] = 0;
triangles[1+n*3] = n+1;
triangles[2+n*3] = n+2;
}
}
Mesh mesh = new Mesh();
GetComponent<MeshFilter>().mesh = mesh;
mesh.Clear();
mesh.vertices = newvertices;
mesh.uv = uvs;
mesh.triangles = triangles;
mesh.RecalculateNormals();
}
}
解决方法:
您从射线广播获得的生命力点是全球性的.您可以:
1)确保网格位于位于0,0,0的游戏对象中.每当我基于射线的命中点创建动态网格物体时,我通常都会在0,0,0处创建一个新的无父级游戏对象并将其添加到其中. (而不是从外部获取容器GameObject)
2)在建立网格之前,在光线投射的命中点上调用lightmeshholder.transform.InverseTransformPoint
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