using UnityEngine;
public class Draw : MonoBehaviour
{
public GameObject linePrefab;
// 线条渲染器
private LineRenderer line;
// 顶点下标
private int i;
public GameObject obj_Parent;
void Update()
{
// 鼠标左键按下瞬间
if (Input.GetMouseButtonDown(0))
{
GameObject go = Instantiate(linePrefab, linePrefab.transform.position, transform.rotation);
line = go.GetComponent<LineRenderer>();
line.transform.parent = GameObject.Find(obj_Parent.name).transform;
// 设置材质
// line.material = new Material(Shader.Find("Particles/Additive"));
// 设置颜色
line.startColor = Color.red;
line.endColor = Color.red;
// 设置宽度
line.startWidth = 0.1f;
line.endWidth = 0.1f;
i = 0;
}
// 鼠标左键按下期间
if (Input.GetMouseButton(0))
{
i++;
// 设置顶点数
line.positionCount = i;
// 设置顶点位置
line.SetPosition(i - 1, Camera.main.ScreenToWorldPoint(
new Vector3(Input.mousePosition.x, Input.mousePosition.y, 10)));
}
}
//删除obj_Parent下面的全部子物体，清空图画内容
public void Btn_Close()
{
for (int i = 0; i < obj_Parent.transform.childCount; i++)
{
Destroy(obj_Parent.transform.GetChild(i).gameObject);
}
}
}创建一个Line Renderer预设体，别忘了设置材质。
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