%绘制桁架函数，Scale为变形缩放系数
function RenderTruss(ele,Load,Constr,x,y,z,U,LineWidth,NodeSize,LineStyle,Scale)
CoordScale=[max(x)-min(x),max(y)-min(y),max(z)-min(z)];
k=1;
%计算变形后坐标
for i=1:length(x)
   if Constr(k,1)==i%--约束节点坐标不变
      k=k+1;
   else%--非约束节点坐标加上缩放后的位移
      x(i)=x(i)+Scale*U(3*i-2,1);y(i)=y(i)+Scale*U(3*i-1,1);z(i)=z(i)+Scale*U(3*i,1);
   end
end
%绘制杆件
for i=1:length(ele(:,1))
   plot3([x(ele(i,2)),x(ele(i,3))],[y(ele(i,2)),y(ele(i,3))],[z(ele(i,2)),z(ele(i,3))],...
   LineStyle,'LineWidth',LineWidth*ele(i,4)/max(ele(:,4)));
   hold on
end
%绘制节点
for i=1:length(x)
   [xx,yy,zz]= ellipsoid(x(i),y(i),z(i),NodeSize,NodeSize,NodeSize);
   surf(xx,yy,zz,'facecolor','k') 
end
%绘制载荷
    maxLoad=abs(Load(1,2))%寻找绝对值最大的·载荷
for i=1:length(Load(:,1))
    if(maxLoad<abs(Load(i,3))) 
        maxLoad=abs(Load(i,3))
    elseif(maxLoad<abs(Load(i,4))) 
        maxLoad=abs(Load(i,4))
    end
end
for i=1:length(Load(:,1))%绘制载荷箭头
   quiver3(x(Load(i,1)),y(Load(i,1)),z(Load(i,1)),Load(i,2)/max(maxLoad),...
   Load(i,3)/max(maxLoad),Load(i,4)/max(maxLoad),...
   'LineWidth',1,'color','r','AutoScaleFactor',0.15*(CoordScale(1)+CoordScale(2)),...
   'MaxHeadSize',0.01*(CoordScale(1)+CoordScale(2)));
end
%绘制约束--选用结构最大的坐标尺寸作为基准来绘制约束
for i=1:length(Constr(:,1))
plot3([x(Constr(i,1)) x(Constr(i,1))-0.02*max(CoordScale) x(Constr(i,1))+...
   0.02*max(CoordScale) x(Constr(i,1))],[y(Constr(i,1)) y(Constr(i,1))+...
   0.02*max(CoordScale) y(Constr(i,1))-0.02*max(CoordScale) y(Constr(i,1))],...
   [z(Constr(i,1)) z(Constr(i,1))-0.03*max(CoordScale) z(Constr(i,1))-...
   0.03*max(CoordScale) z(Constr(i,1))],'LineWidth',0.8,'color','r');
end
%绘制坐标轴
axis equal
axis([min(x)-0.1*CoordScale(1),max(x)+0.1*CoordScale(1),min(y)-...
0.1*CoordScale(2),max(y)+0.1*CoordScale(2),min(z)-0.1*CoordScale(3),...
max(z)+0.1*CoordScale(3)]) %限定图像的显示范围
hold off
end