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Diffstat (limited to 'Master/texmf/asymptote/trembling.asy')
-rw-r--r-- | Master/texmf/asymptote/trembling.asy | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/Master/texmf/asymptote/trembling.asy b/Master/texmf/asymptote/trembling.asy deleted file mode 100644 index 6f6f5973332..00000000000 --- a/Master/texmf/asymptote/trembling.asy +++ /dev/null @@ -1,216 +0,0 @@ -// Copyright(c) 2008, Philippe Ivaldi. -// Simplified by John Bowman 02Feb2011 -// http: //www.piprime.fr/ -// trembling.asy: handwriting package for the software Asymptote. - -// This program is free software; you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation; either version 3 of the License, or -//(at your option) any later version. - -// This program is distributed in the hope that it will be useful, but -// WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -// Lesser General Public License for more details. - -// You should have received a copy of the GNU Lesser General Public License -// along with this program; if not, write to the Free Software -// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - -// COMMENTARY: - -// THANKS: - -// BUGS: -// magnetic points are experimental... - -// CODE: - -real magneticRadius=1; // unit is bp in postscript coordinates. -real trembleFuzz(){return min(1e-3,magneticRadius/10);} - -/* <asyxml> <variable type="real" signature="trembleAngle"> <code> </asyxml> */ -real trembleAngle=4, trembleFrequency=0.5, trembleRandom=2; -/* <asyxml> </code> <documentation> Variables used by the routine 'tremble'. - </documentation> </variable> </asyxml> */ - -struct tremble -{ - static real test=5; - - real angle,frequency,random,fuzz; - - pair[] single(pair[] P) - { - pair[] op; - bool allow; - for(int i=0; i < P.length-1; ++i) { - allow=true; - for(int j=i+1; j < P.length; ++j) { - if(abs(P[i]-P[j]) < magneticRadius) { - allow=false; - break; - } - } - if(allow) op.push(P[i]); - } - if(P.length > 0) op.push(P[P.length-1]); - return op; - } - - /* <asyxml> <function type="pair" signature="attract(pair,path,real)"> <code> - </asyxml> */ - real atime(pair m, path g, real fuzz=trembleFuzz()) - {/* <asyxml> </code> <documentation> Return the time of the point on path g - nearest to 'm'. - 'fuzz' is the argument 'fuzz' of 'intersect'. </documentation> </function> - </asyxml> */ - if(length(g) == 0) return 0.0; - real[] t=intersect(m,g,fuzz); - if(t.length > 0) return t[1]; - real ot; - static real eps=sqrt(realEpsilon); - real abmax=abs(max(g)-m), abmin=abs(min(g)-m); - real initr=abs(m-midpoint(g)); - real maxR=2*max(abmax,abmin), step=eps, r=initr; - real shx=1e-4; - transform T=shift(m); - path ig; - if(t.length > 0) ot=t[1]; - real rm=0, rM=r; - while(rM-rm > eps) { - r=(rm+rM)/2; - t=intersect(T*scale(r)*unitcircle,g,fuzz); - if(t.length <= 0) { - rm=r; - } else { - rM=r; - ot=t[1]; - } - } - return ot; - } - - /* <asyxml> <function type="path" signature="addnode(path,real)"> <code> - </asyxml> */ - path addnode(path g, real t) - {/* <asyxml> </code> <documentation> Add a node to 'g' at point(g,t). - </documentation> </function> </asyxml> */ - real l=length(g); - real rt=t % 1; - if(l == 0 || (t > l && !cyclic(g)) || rt == 0) return g; - if(cyclic(g)) t=t % l; - int t0=floor(t); - int t1=t0+1; - pair z0=point(g,t0), z1=point(g,t1), - c0=postcontrol(g,t0), c1=precontrol(g,t1), - m0=(1-rt)*z0+rt*c0, m1=(1-rt)*c0+rt*c1, - m2=(1-rt)*c1+rt*z1, m3=(1-rt)*m0+rt*m1, - m4=(1-rt)*m1+rt*m2; - guide og=subpath(g,0,t0)..controls m0 and m3..point(g,t); - if(cyclic(g)) { - if(t1 < l) - og=og..controls m4 and m2..subpath(g,t1,l)&cycle; - else og=og..controls m4 and m2..cycle; - } else og=og..controls m4 and m2..subpath(g,t1,l); - return og; - } - - path addnodes(path g, real fuzz=trembleFuzz()...pair[] P) - { - pair[] P=single(P); - if(length(g) == 0 || P.length == 0 || magneticRadius <= 0) return g; - path og=g; - for(pair tp: P) { - real t=atime(tp,og,fuzz); - real d=abs(tp-point(og,t)); - if(d < magneticRadius) og=addnode(og,t); - } - return og; - } - - /* <asyxml> <function type="path" signature="addnodes(path,int)"> <code> - </asyxml> */ - path addnodes(path g, int n) - {/* <asyxml> </code> <documentation> Add 'n' nodes between each node of 'g'. - </documentation> </function> </asyxml> */ - real l=length(g); - if(n == 0 || l == 0) return g; - path og=g; - int np=0; - for(int i=0; i < l; ++i) { - real step=1/(n+1); - for(int j=0; j < n; ++j) { - og=addnode(og,i*(n+1)+j+step); - step=1/(n-j); - } - } - return og; - } - - /* <asyxml> <function type="path" - signature="tremble(path,real,real,real,real,pair[] )"> <code> </asyxml> */ - void operator init(real angle=trembleAngle, real frequency=trembleFrequency, - real random=trembleRandom, real fuzz=trembleFuzz()) { - this.angle=angle; - this.frequency=frequency; - this.random=random; - this.fuzz=fuzz; - } - - path deform(path g...pair[] magneticPoints) { - /* <asyxml> </code> <documentation> Return g as it was handwriting. - The postcontrols and precontrols of the nodes of g will be rotated - by an angle proportional to 'angle'(in degrees). - If frequency < 1, floor(1/frequency) nodes will be added to g to - increase the control points. - If frequency>= 1, one point for floor(frequency) will be used to deform - the path. - 'random' controls the randomized coefficient which will be multiplied - by 'angle'. - random is 0 means don't use randomized coefficient; - The higher 'random' is, the more the trembling is randomized. - </documentation> </function> </asyxml> */ - if(length(g) == 0) return g; - g=addnodes(g,fuzz*abs(max(g)-min(g))...magneticPoints); - path tg=g; - frequency=abs(frequency); - int f=abs(floor(1/frequency)-1); - tg=addnodes(tg,f); - int frequency=floor(frequency); - int tf=(frequency == 0) ? 1 : frequency; - int l=length(tg); - guide og=point(tg,0); - random=abs(random); - int rsgn(real x){ - int d2=floor(100*x)-10*floor(10*x); - if(d2 == 0) return 1; - return 2 % d2 == 0 ? 1 : -1; - } - real randf() - { - real or; - if(random != 0) { - if(1 % tf != 0) or=0; - else { - real ur=unitrand(); - or=rsgn(ur)*angle*(1+ur^(1/random)); - } - } else or=rsgn(unitrand())*1.5*angle; - return or; - } - - real first=randf(); - for(int i=1; i <= l; ++i) { - pair P=point(tg,i); - real a=randf(); - pair post=rotate(a,point(tg,i-1))*postcontrol(tg,i-1); - pair pre=rotate((a+randf())/2,P)*precontrol(tg,i); - if(i == l && (cyclic(tg))) - og=og..controls post and pre..cycle; - else - og=og..controls post and pre..P; - } - return og; - } -} |