%绘制桁架函数，Scale为变形缩放系数(以下为绘制图像部分）
function AxisForce(ele,Load,Constr,x,y,U,LineWidth,LineStyle,Scale,AxialForce)
CoordScale=[max(x)-min(x),max(y)-min(y)];
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(2*i-1,1);y(i)=y(i)+Scale*U(2*i,1);
   end
end
%绘制杆件
jet_color = colormap(jet(ceil(max(AxialForce)-min(AxialForce)+1)));%+1是为了避免索引为0
color_index = ceil(AxialForce+(1-min(AxialForce)));
for i=1:length(ele(:,1))
    
   plot([x(ele(i,2)),x(ele(i,3))],[y(ele(i,2)),y(ele(i,3))],...
   'color',jet_color(color_index(i),:),'LineWidth',LineWidth*ele(i,4)/max(ele(:,4)));
    hold on
end
colorbar
caxis([min(AxialForce),max(AxialForce)]);
% figure
% for i=1:length(ele(:,1))
%    plot([x(ele(i,2)),x(ele(i,3))],[y(ele(i,2)),y(ele(i,3))],...
%    LineStyle,'LineWidth',LineWidth*ele(i,4)/max(ele(:,4)));
%    
% hold on
% end
%绘制节点
for i=1:length(x)
   x1=x(i);y1=y(i);
   scatter(x1,y1,15,'k','filled') 
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))
    end
end
for i=1:length(Load(:,1))%绘制载荷箭头
   quiver(x(Load(i,1)),y(Load(i,1)),Load(i,2)/max(maxLoad),...
   Load(i,3)/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))
plot([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))],...
   '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)]...
) %限定图像的显示范围
hold off
end