UGUI绘制多点连续的平滑曲线
本文实例为大家分享了UGUI绘制平滑曲线的具体代码，供大家参考，具体内容如下
绘制
实现自定义的MaskableGraphic挂载在UGUI的UI节点上
publicclassUGUIObjectRender:MaskableGraphic
{
/**
*points为需要穿过的点
*segments为曲线细分度
*linewidth为曲线粗细
*/
protectedoverridevoidOnPopulateMesh(VertexHelpervh)
{
vh.DrawBeziers(points,segments,linewidth);
}
}
需要时用的工具类在后面
二次贝塞尔工具类
usingUnityEngine;
namespaceViVi.UIExtensions
{
/**
*Createdbyvivion16/5/11.
*/
publicclassBezierUtils{
publicfloatP0x;
publicfloatP1x;
publicfloatP2x;
publicfloatP3x;
publicfloatP0y;
publicfloatP1y;
publicfloatP2y;
publicfloatP3y;
publicBezierUtils(floatp0x,floatp0y,floatp1x,floatp1y,floatp2x,floatp2y,floatp3x,floatp3y){
P0x=p0x;
P0y=p0y;
P1x=p1x;
P1y=p1y;
P2x=p2x;
P2y=p2y;
P3x=p3x;
P3y=p3y;
}
publicBezierUtils(Vector2p0,Vector2p1,Vector2p2,Vector2p3){
P0x=p0.x;
P0y=p0.y;
P1x=p1.x;
P1y=p1.y;
P2x=p2.x;
P2y=p2.y;
P3x=p3.x;
P3y=p3.y;
}
publicfloatbeze_x(floatt){
floatit=1-t;
returnit*it*it*P0x+3*it*it*t*P1x+3*it*t*t*P2x+t*t*t*P3x;
}
publicfloatbeze_y(floatt){
floatit=1-t;
returnit*it*it*P0y+3*it*it*t*P1y+3*it*t*t*P2y+t*t*t*P3y;
}
//-------------------------------------------------------------------------------------
publicfloatbeze_speed_x(floatt)
{
floatit=1-t;
return-3*P0x*it*it+3*P1x*it*it-6*P1x*it*t+6*P2x*it*t-3*P2x*t*t+3*P3x*t*t;
}
publicfloatbeze_speed_y(floatt)
{
floatit=1-t;
return-3*P0y*it*it+3*P1y*it*it-6*P1y*it*t+6*P2y*it*t-3*P2y*t*t+3*P3y*t*t;
}
privatefloatbeze_speed(floatt)
{
floatsx=beze_speed_x(t);
floatsy=beze_speed_y(t);
return(float)Mathf.Sqrt(Mathf.Pow(sx,2)+Mathf.Pow(sy,2));
}
//-------------------------------------------------------------------------------------
privatefloatbeze_length(floatt)
{
floatLATESTCOUNT=10000;
intsteps=(int)Mathf.Ceil(LATESTCOUNT*t);
if(steps==0)
return0;
if(steps%2!=0)
steps++;
floathalfSteps=steps*.5f;
floatnSum=0;
floatn1Sum=0;
floatdisStep=t/steps;
for(inti=0;i
UGUI绘图工具类
usingSystem.Collections.Generic;
usingUnityEngine;
usingUnityEngine.UI;
namespaceViVi.UIExtensions
{
publicstaticclassPolygonHelper
{
publicstaticvoidAddUIVertexTriangles(thisVertexHelpervh,UIVertex[]verts)
{
for(inti=0;ivertices,floatx,floaty,Colorcolor)
{
UIVertexv=UIVertex.simpleVert;
v.color=color;
v.position=newVector2(x,y);
v.uv0=Vector2.zero;
}
//画圆形
publicstaticvoidcircle(thisVertexHelpervh,Vector2pos,floatradius,Colorcolor,boolfilled=false){
circle(vh,pos.x,pos.y,radius,Mathf.Max(1,(int)(6*Mathf.Pow(radius,1/3f))),color,filled);
}
publicstaticvoidcircle(thisVertexHelpervh,floatx,floaty,floatradius,Colorcolor,boolfilled=false){
circle(vh,x,y,radius,Mathf.Max(1,(int)(6*Mathf.Pow(radius,1/3f))),color,filled);
}
publicstaticvoidcircle(thisVertexHelpervh,floatx,floaty,floatradius,intsegments,Colorcolor,boolfilled=false){
if(segments>0){
floatangle=2*Mathf.PI/segments;
floatcos=Mathf.Cos(angle);
floatsin=Mathf.Sin(angle);
floatcx=radius,cy=0;
Listvs=newList();
segments--;
for(inti=0;ipoints,floatsegment,floatwidth)
{
Listbeziers=CreateBeziers(points);
if(beziers!=null){
for(inti=0;i=0){
vec.x=-vec.y;
vec.y=x;
}else{
vec.x=vec.y;
vec.y=-x;
}
returnvec;
}
publicstaticVector2cpy(thisVector2vec){
returnnewVector2(vec.x,vec.y);
}
privatestaticvoidDrawBezier(VertexHelpervh,BezierUtilsbezier,floatsegment,floatwidth)
{
Listlpos=newList();
Listrpos=newList();
for(inti=0;i<=segment;i++)
{
Vector2bezierPos=newVector2(bezier.beze_x((float)i/(float)segment),bezier.beze_y((float)i/(float)segment));
Vector2bezierSpeed=newVector2(bezier.beze_speed_x((float)i/(float)segment),bezier.beze_speed_y((float)i/(float)segment));
Vector2offseta=bezierSpeed.normalized.rotate90(1)*(0.5f*width);
Vector2offsetb=bezierSpeed.normalized.rotate90(-1)*(0.5f*width);
lpos.Add(bezierPos.cpy()+offseta);
rpos.Add(bezierPos.cpy()+offsetb);
}
for(intj=0;jCreateBeziers(Listpoints)
{
floatscale=0.6f;
Listbeziers=newList();
intoriginCount=points.Count-1;
Listmidpoints=newList();
for(inti=0;ictrlPoints=newList();
floatoffsetx;
floatoffsety;
ctrlPoints.Add(newVector2(
points[0].x,
points[0].y
));
for(inti=0;i
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。