What is the difference between settings.render=10 and settings.render=15 in the following examples?












1















Both examples in ASY_3D.pdf



documentclass[border=5pt,varwidth]{standalone}
usepackage{asymptote}

begin{document}

begin{asy}
settings.outformat="png";
// settings.render=10; //<<<----
settings.prc=false;

import graph3;
import contour;
size(7.5cm,0);
size3(7.5cm,IgnoreAspect);
currentprojection=orthographic(-6,-20,600);
currentlight=White;
limits((0,0,0),(10,10,300));
xaxis3(OutTicks(Step=2));
yaxis3(OutTicks(Step=5));
zaxis3(Bounds(Min,Max),InTicks(Step=100,Label(align=-X),NoZero));
real f(pair z) {return 2z.x^2-z.x+z.y^2;}
draw(surface(f,(0,0),(10,10),nx=10,Spline),lightgray,meshpen=black);
path p1=(5,1)--(9,1)--(9,4)--(5,4)--cycle,
p2=(4,0)--(0,8),
p3;
for(int i=0; i<=10;++i) p3=p3..point(p2,i/10);
guide tabgui={{p1,p2,p3}};
draw(lift(f,tabgui),1bp+red);
draw(path3(p1),1bp+.8green);
draw(path3(p2),1bp+.8purple);
draw(extrude(p1,axis=200Z),blue+opacity(.75));
end{asy}

end{document}


With settings.render=10; it produces a figure about 500KB



enter image description here



But with settings.render=15; it produces a figure about 894KB



enter image description here



See the following example:



documentclass[border=5pt,varwidth]{standalone}
usepackage{asymptote}

begin{document}

begin{asy}
settings.outformat="png";
settings.render=15;
settings.prc=false;

import graph3;
currentprojection=orthographic(1,-2,1);
currentlight=(1,-1,0.5);
size(7cm,0);
real f(pair z) {return abs(z)^2;}
path3 gradient(pair z) {
static real dx=sqrtEpsilon, dy=dx;
return O--((f(z+dx)-f(z-dx))/2dx,
(f(z+I*dy)-f(z-I*dy))/2dy,0);}
pair a=(-1,-1);
pair b=(1,1);
triple F(pair z) {return (z.x,z.y,0);}
add(vectorfield(gradient,F,a,b,red));
draw(surface(f,a,b,Spline),gray+opacity(0.5));
xaxis3(XY()*"$x$",OutTicks(XY()*Label));
yaxis3(XY()*"$y$",InTicks(YX()*Label));
zaxis3("$z$",OutTicks);
end{asy}

end{document}


With settings.render=15; it produces a figure about 646KB



enter image description here



With settings.render=10; it produces a figure about 307KB



enter image description here



Can you explain to me the reason of this case?










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    Both examples in ASY_3D.pdf



    documentclass[border=5pt,varwidth]{standalone}
    usepackage{asymptote}

    begin{document}

    begin{asy}
    settings.outformat="png";
    // settings.render=10; //<<<----
    settings.prc=false;

    import graph3;
    import contour;
    size(7.5cm,0);
    size3(7.5cm,IgnoreAspect);
    currentprojection=orthographic(-6,-20,600);
    currentlight=White;
    limits((0,0,0),(10,10,300));
    xaxis3(OutTicks(Step=2));
    yaxis3(OutTicks(Step=5));
    zaxis3(Bounds(Min,Max),InTicks(Step=100,Label(align=-X),NoZero));
    real f(pair z) {return 2z.x^2-z.x+z.y^2;}
    draw(surface(f,(0,0),(10,10),nx=10,Spline),lightgray,meshpen=black);
    path p1=(5,1)--(9,1)--(9,4)--(5,4)--cycle,
    p2=(4,0)--(0,8),
    p3;
    for(int i=0; i<=10;++i) p3=p3..point(p2,i/10);
    guide tabgui={{p1,p2,p3}};
    draw(lift(f,tabgui),1bp+red);
    draw(path3(p1),1bp+.8green);
    draw(path3(p2),1bp+.8purple);
    draw(extrude(p1,axis=200Z),blue+opacity(.75));
    end{asy}

    end{document}


    With settings.render=10; it produces a figure about 500KB



    enter image description here



    But with settings.render=15; it produces a figure about 894KB



    enter image description here



    See the following example:



    documentclass[border=5pt,varwidth]{standalone}
    usepackage{asymptote}

    begin{document}

    begin{asy}
    settings.outformat="png";
    settings.render=15;
    settings.prc=false;

    import graph3;
    currentprojection=orthographic(1,-2,1);
    currentlight=(1,-1,0.5);
    size(7cm,0);
    real f(pair z) {return abs(z)^2;}
    path3 gradient(pair z) {
    static real dx=sqrtEpsilon, dy=dx;
    return O--((f(z+dx)-f(z-dx))/2dx,
    (f(z+I*dy)-f(z-I*dy))/2dy,0);}
    pair a=(-1,-1);
    pair b=(1,1);
    triple F(pair z) {return (z.x,z.y,0);}
    add(vectorfield(gradient,F,a,b,red));
    draw(surface(f,a,b,Spline),gray+opacity(0.5));
    xaxis3(XY()*"$x$",OutTicks(XY()*Label));
    yaxis3(XY()*"$y$",InTicks(YX()*Label));
    zaxis3("$z$",OutTicks);
    end{asy}

    end{document}


    With settings.render=15; it produces a figure about 646KB



    enter image description here



    With settings.render=10; it produces a figure about 307KB



    enter image description here



    Can you explain to me the reason of this case?










    share|improve this question







    New contributor




    New user is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























      1












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      1








      Both examples in ASY_3D.pdf



      documentclass[border=5pt,varwidth]{standalone}
      usepackage{asymptote}

      begin{document}

      begin{asy}
      settings.outformat="png";
      // settings.render=10; //<<<----
      settings.prc=false;

      import graph3;
      import contour;
      size(7.5cm,0);
      size3(7.5cm,IgnoreAspect);
      currentprojection=orthographic(-6,-20,600);
      currentlight=White;
      limits((0,0,0),(10,10,300));
      xaxis3(OutTicks(Step=2));
      yaxis3(OutTicks(Step=5));
      zaxis3(Bounds(Min,Max),InTicks(Step=100,Label(align=-X),NoZero));
      real f(pair z) {return 2z.x^2-z.x+z.y^2;}
      draw(surface(f,(0,0),(10,10),nx=10,Spline),lightgray,meshpen=black);
      path p1=(5,1)--(9,1)--(9,4)--(5,4)--cycle,
      p2=(4,0)--(0,8),
      p3;
      for(int i=0; i<=10;++i) p3=p3..point(p2,i/10);
      guide tabgui={{p1,p2,p3}};
      draw(lift(f,tabgui),1bp+red);
      draw(path3(p1),1bp+.8green);
      draw(path3(p2),1bp+.8purple);
      draw(extrude(p1,axis=200Z),blue+opacity(.75));
      end{asy}

      end{document}


      With settings.render=10; it produces a figure about 500KB



      enter image description here



      But with settings.render=15; it produces a figure about 894KB



      enter image description here



      See the following example:



      documentclass[border=5pt,varwidth]{standalone}
      usepackage{asymptote}

      begin{document}

      begin{asy}
      settings.outformat="png";
      settings.render=15;
      settings.prc=false;

      import graph3;
      currentprojection=orthographic(1,-2,1);
      currentlight=(1,-1,0.5);
      size(7cm,0);
      real f(pair z) {return abs(z)^2;}
      path3 gradient(pair z) {
      static real dx=sqrtEpsilon, dy=dx;
      return O--((f(z+dx)-f(z-dx))/2dx,
      (f(z+I*dy)-f(z-I*dy))/2dy,0);}
      pair a=(-1,-1);
      pair b=(1,1);
      triple F(pair z) {return (z.x,z.y,0);}
      add(vectorfield(gradient,F,a,b,red));
      draw(surface(f,a,b,Spline),gray+opacity(0.5));
      xaxis3(XY()*"$x$",OutTicks(XY()*Label));
      yaxis3(XY()*"$y$",InTicks(YX()*Label));
      zaxis3("$z$",OutTicks);
      end{asy}

      end{document}


      With settings.render=15; it produces a figure about 646KB



      enter image description here



      With settings.render=10; it produces a figure about 307KB



      enter image description here



      Can you explain to me the reason of this case?










      share|improve this question







      New contributor




      New user is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      Both examples in ASY_3D.pdf



      documentclass[border=5pt,varwidth]{standalone}
      usepackage{asymptote}

      begin{document}

      begin{asy}
      settings.outformat="png";
      // settings.render=10; //<<<----
      settings.prc=false;

      import graph3;
      import contour;
      size(7.5cm,0);
      size3(7.5cm,IgnoreAspect);
      currentprojection=orthographic(-6,-20,600);
      currentlight=White;
      limits((0,0,0),(10,10,300));
      xaxis3(OutTicks(Step=2));
      yaxis3(OutTicks(Step=5));
      zaxis3(Bounds(Min,Max),InTicks(Step=100,Label(align=-X),NoZero));
      real f(pair z) {return 2z.x^2-z.x+z.y^2;}
      draw(surface(f,(0,0),(10,10),nx=10,Spline),lightgray,meshpen=black);
      path p1=(5,1)--(9,1)--(9,4)--(5,4)--cycle,
      p2=(4,0)--(0,8),
      p3;
      for(int i=0; i<=10;++i) p3=p3..point(p2,i/10);
      guide tabgui={{p1,p2,p3}};
      draw(lift(f,tabgui),1bp+red);
      draw(path3(p1),1bp+.8green);
      draw(path3(p2),1bp+.8purple);
      draw(extrude(p1,axis=200Z),blue+opacity(.75));
      end{asy}

      end{document}


      With settings.render=10; it produces a figure about 500KB



      enter image description here



      But with settings.render=15; it produces a figure about 894KB



      enter image description here



      See the following example:



      documentclass[border=5pt,varwidth]{standalone}
      usepackage{asymptote}

      begin{document}

      begin{asy}
      settings.outformat="png";
      settings.render=15;
      settings.prc=false;

      import graph3;
      currentprojection=orthographic(1,-2,1);
      currentlight=(1,-1,0.5);
      size(7cm,0);
      real f(pair z) {return abs(z)^2;}
      path3 gradient(pair z) {
      static real dx=sqrtEpsilon, dy=dx;
      return O--((f(z+dx)-f(z-dx))/2dx,
      (f(z+I*dy)-f(z-I*dy))/2dy,0);}
      pair a=(-1,-1);
      pair b=(1,1);
      triple F(pair z) {return (z.x,z.y,0);}
      add(vectorfield(gradient,F,a,b,red));
      draw(surface(f,a,b,Spline),gray+opacity(0.5));
      xaxis3(XY()*"$x$",OutTicks(XY()*Label));
      yaxis3(XY()*"$y$",InTicks(YX()*Label));
      zaxis3("$z$",OutTicks);
      end{asy}

      end{document}


      With settings.render=15; it produces a figure about 646KB



      enter image description here



      With settings.render=10; it produces a figure about 307KB



      enter image description here



      Can you explain to me the reason of this case?







      asymptote






      share|improve this question







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