diff options
Diffstat (limited to 'Master/texmf/doc/asymptote/examples/animations/heatequation.asy')
-rw-r--r-- | Master/texmf/doc/asymptote/examples/animations/heatequation.asy | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/Master/texmf/doc/asymptote/examples/animations/heatequation.asy b/Master/texmf/doc/asymptote/examples/animations/heatequation.asy deleted file mode 100644 index 3c5708e583f..00000000000 --- a/Master/texmf/doc/asymptote/examples/animations/heatequation.asy +++ /dev/null @@ -1,76 +0,0 @@ -import graph3; -import palette; -import animate; - -settings.tex="pdflatex"; -settings.render=0; -settings.prc=false; -unitsize(1cm); - -animation a; - -currentprojection=perspective(-20,-18,18); -currentlight=light(1,1,10); - -int n=26; -real L=2.5; -real dx=2*L/n; -real CFL=0.125; -real dt=CFL*dx^2; - -real[][] Z=new real[n][n]; -real[][] W=new real[n][n]; - -guide initcond1=shift((-1,-1))*scale(0.5)*unitcircle; -guide initcond2=shift((0.5,0))*yscale(1.2)*unitcircle; - -real f(pair p) {return (inside(initcond1,p)||inside(initcond2,p)) ? 2 : 0;} - -//Initialize -for(int i=0; i < n; ++i) - for (int j=0; j < n; ++j) - Z[i][j]=f((-L,-L)+(2*L/n)*(i,j)); - -real f(pair t) { - int i=round((n/2)*(t.x/L+1)); - int j=round((n/2)*(t.y/L+1)); - if(i > n-1) i=n-1; - if(j > n-1) j=n-1; - return Z[i][j]; -} - -surface sf; - -void advanceZ(int iter=20) { - for(int k=0; k < iter; ++k) { - for(int i=0; i < n; ++i) - for(int j=0; j < n; ++j) W[i][j]=0; - for(int i=1; i < n-1; ++i) - for(int j=1; j< n-1; ++j) - W[i][j]=Z[i][j]+(dt/dx^2)*(Z[i+1][j]+Z[i-1][j]+Z[i][j-1]+Z[i][j+1] - -4*Z[i][j]); - for(int i=0; i < n; ++i) - for(int j=0; j < n; ++j) - Z[i][j]=W[i][j]; - }; -} - -pen[] Pal=Rainbow(96); - -int endframe=40; - -for(int fr=0; fr < endframe; ++fr) { - if(fr == 0) {// smoothing of initial state; no Spline, but full grid - advanceZ(3); - sf=surface(f,(-L,-L),(L,L),nx=n); - } else // use Spline and fewer grid points to save memory - sf=surface(f,(-L,-L),(L,L),nx=round(n/2),Spline); - sf.colors(palette(sf.map(zpart),Pal[0:round(48*max(sf).z)])); - draw(sf); - a.add(); - erase(); - advanceZ(30); -}; - -label(a.pdf(delay=400,"controls,loop")); -shipout(bbox(3mm,darkblue+3bp+miterjoin,FillDraw(fillpen=paleblue)),"pdf"); |