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unity实战之linerrender自定义绘画
unity实战之使用LineRenderer自定义画线
由于画板ui是在Canvas层，而LineRenderer画线是在世界空间中。如果按照层级显示，先渲染场景LineRenderer层，再渲染UI层，会导致画线被ui挡住。
为了让LineRenderer显示在UI层上方，我们考虑使用双摄像机来处理。简而言之就是为LineRenderer单独安排一个摄像机用于专门去渲染Line Renderer。
ui
1.创建Camera，命名为LineCamera，调整参数如下：
Clear Flags：Depth only
Projection：Orthographic
其他参数根据实际情况调整。
2.创建Line Renderer,命名为Liner。
3.新建一个多边形碰撞器Ploygon Collider 2D，命名为bg,调节碰撞区域。并为其添加Line Renderer Ctrl脚本，并为其MapCamera，go赋值如下:
MapCamera:LineCamera
go:Liner
4.创建绘画拖尾效果,使用拖尾特效UI_tuowei_10，挂载在bg下。
代码
local view = baseview:new("test2")
local base = view
local ui = nil
function view:start()
model = base.model
ui = base.group
ui = {}
ui.camera = utils.loadinstobj("hero","LineCamera",Layer.MapRoot)
ui.camera.transform.position = Vector3.zero
ui.Liner = utils.findobj(ui.camera,"Liner")
ui.bg = utils.findobj(ui.camera,"bg")
ui.line_ctrl = ui.bg:GetComponent("LineRendererCtrl")
ui.tuowei = utils.findobj(ui.camera,"bg/UI_tuowei_10")
ui.line_ctrl.onComplet = base.on_draw_complet
ui.line_ctrl.onDrag = base.draw_onDrag
end
function base:commit()
ui.Liner:SetActive(true)
ui.line_ctrl:Ready()
base.RefreshUI()
end
function base.RefreshUI()
end
function base.draw_onDrag(go,v3)
--绘画拖尾效果
ui.tuowei:SetActive(true)
ui.tuowei.transform.localPosition = v3
end
function base.on_draw_complet()
ui.tuowei:SetActive(false)
ui.line_ctrl:ScaleDrawing(0,0.25)
-- --画完之后隐藏绘画
-- ui.Liner:SetActive(false)
ui.line_ctrl:Ready()
end
function view:destroy()
ui = nil
renders = {}
build_list = {}
build_data = nil
end
return view
效果预览
LineRendererCtrl脚本
using DG.Tweening;
using LuaInterface;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
public class LineRendererCtrl : MonoBehaviour,IPointerDownHandler, IPointerUpHandler, IBeginDragHandler, IDragHandler, IEndDragHandler
{
public LuaFunction onComplet;
public LuaFunction onDrag;
public Camera MapCamera;
public GameObject go;
public bool isstart = false;
public bool isclose = true;
// public float scale = 0.5f;
public float pos_z = 100;
private LineRenderer line;
public Vector3[] points;
private float time = 0;
public float max_time = 30;
List<Vector3> pos = new List<Vector3>();
void Awake()
{
points = pos.ToArray();
line = go.GetComponent<LineRenderer>();
// line.startColor = Color.blue;
// line.endColor = Color.blue;
// line.startWidth = 0.1f;
// line.endWidth = 0.1f;
}
public void SetColor(Color c1,Color c2)
{
if (line == null) return;
line.startColor = c1;
line.endColor = c2;
}
public void SetWidth(float f1, float f2)
{
if (line == null) return;
line.startWidth = f1;
line.endWidth = f2;
}
public void Clear()
{
pos.Clear();
points = pos.ToArray();
}
public void Ready()
{
isclose = false;
time = 0;
Clear();
line.positionCount = points.Length;
line.SetPositions(points);
}
void OnDestroy()
{
Clear();
if (onComplet != null)
{
onComplet.Dispose();
onComplet = null;
}
if (onDrag != null)
{
onDrag.Dispose();
onDrag = null;
}
isstart = false;
isclose = true;
}
void Update()
{
if (isclose) return;
if (!isstart) return;
time += Time.deltaTime;
// Util.Log("time+++" + time);
if (time >= max_time)
{
isstart = false;
time = 0f;
EndDrawing();
return;
}
//Util.Log("GetMouseButton+++" + Input.GetMouseButton(0).ToString());
//if (Input.GetMouseButton(0))
//{
// Vector3 result = MapCamera.ScreenToWorldPoint(Input.mousePosition);
// Util.Log("GetMouseButtonDown+++" + time);
// pos.Add(result);
// points = pos.ToArray();
//}
Drawing();
}
public void ScaleDrawing(float scale,float _time)
{
if (line != null && points.Length != 0)
{
Tween _tween = DOTween.To(() => 1, _v => ToScale(_v), scale, _time);
_tween = _tween.SetEase(Ease.InQuart);
_tween.PlayForward();
}
}
public void ToScale(float scale)
{
if (line != null && points.Length != 0)
{
for (int i = 0; i < points.Length; i++)
{
points[i] = new Vector3(points[i].x*scale, points[i].y*scale, points[i].z);
}
line.positionCount = points.Length;
line.SetPositions(points);
}
}
public void EndDrawing()
{
if (isclose) return;
isclose = true;
if (line != null && points.Length != 0)
{
// for (int i = 0; i < points.Length; i++)
// {
// points[i] = new Vector3(points[i].x*scale, points[i].y*scale, points[i].z);
// }
line.positionCount = points.Length;
line.SetPositions(points);
}
if (onComplet != null)
onComplet.Call(points);
}
public void Drawing()
{
if (line!=null && points.Length != 0)
{
// Util.Log("Length+++" + points.Length);
//line.SetVertexCount(points.Length);
line.positionCount = points.Length;
line.SetPositions(points);
}
}
public void OnBeginDrag(PointerEventData eventData)
{
if (isclose) return;
// Util.Log("LineRendererCtrl OnBeginDrag");
isstart = true;
}
public void OnDrag(PointerEventData eventData)
{
// Util.Log("LineRendererCtrl OnDrag");
if (isclose) return;
if (!isstart) return;
//Util.Log(eventData.pointerEnter.name);
if (eventData.pointerEnter==null) return;
if (eventData.pointerEnter.name!="bg")
{
isstart = false;
EndDrawing();
return;
}
Vector3 result = MapCamera.ScreenToWorldPoint(eventData.position);
if (onDrag != null)
onDrag.Call(gameObject, result);
result.z = pos_z;
pos.Add(result);
points = pos.ToArray();
}
public void OnEndDrag(PointerEventData eventData)
{
isstart = false;
Util.Log("LineRendererCtrl OnEndDrag");
//EndDrawing();
}
public void OnPointerDown(PointerEventData eventData)
{
if (isclose) return;
Util.Log("LineRendererCtrl OnPointerDown");
isstart = true;
}
public void OnPointerUp(PointerEventData eventData)
{
Util.Log("LineRendererCtrl OnPointerUp");
isstart = false;
EndDrawing();
}
}
标题：unity实战之linerrender自定义绘画
作者：shirlnGame
地址：https://www.mmzsblog.cn/articles/2024/03/26/1711436649205.html
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