contourplot_SA(model,Z,mtot,vmax,Tmax,Pmax,deltav,deltaT,tit)

function contourplot_SA(model,Z,mtot,vmax,Tmax,Pmax,deltav,deltaT,tit)
%PLOT_FORCES3D
%plot_forces3D(model,Z,mtot,vmax,Tmax,Pmax,deltav,deltaT,tit,cmap)
%this function plots the 3D traction force as a function of speed and
%torque for a given model,Z,total mass, maximum values for speed, torque and power
%should be given, and also speedstep and torquestep, a title and a colormap
%are inputs.

if not(isnumeric(model))

% nieuwe punten
% we maken een schone grid van nieuwe punten
vgrid = 0:deltav:vmax;
Tgrid = 0:deltaT:Tmax;

for k=1:length(vgrid)
hulp(((k-1)*(length(Tgrid))+1):k*length(Tgrid),:)=[vgrid(k).*ones(length(Tgrid),1) Tgrid'];
end
Xnew = hulp;
Ynew = simlssvm(model,Xnew);

%voor een mooi figuurtje 
%halen we de slechte punten eruit
Plim=Pmax;
Tlim=Tmax;
for i=1:length(Xnew)
    if or(Xnew(i,1)/3.6*Xnew(i,2)/Z>Plim,Ynew(i)>120)
            Ynew(i)=NaN;
    end
        if Xnew(i,2)>Tlim
            Ynew(i)=NaN;
        end
end

%omzetten in percent van de helling die men kan oprijden...
g=9.81;
for i=1:length(Ynew)
    SA(i)=tan(asin(Ynew(i)/(mtot*g)))*100;
end

   
%Herconstrueren van een grid!
[Xen Yen]=meshgrid(vgrid,Tgrid);

for k=1:length(vgrid)
        SAS(:,k)=SA(((k-1)*length(Tgrid))+1:k*length(Tgrid));
end  


set(text,'fontsize',12)
[C,h]=contour(Xen,Yen,SAS);
clabel(C,h);
axis([0 vmax 0 Tmax]);
title(tit,'fontsize',14)
xlabel('Speed [km/h]')
ylabel('Torque [Nm]')
else
     errordlg('there are no models found for this assistance mode','Bad Input','modal')
end