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/*****
* animation.asy
* Andy Hammerlindl and John Bowman 2005/11/06
*
* Produce GIF, inline PDF, or other animations.
*****/
// animation delay is in milliseconds
real animationdelay=50;
typedef frame enclosure(frame);
frame NoBox(frame f) {
return f;
}
enclosure BBox(real xmargin=0, real ymargin=xmargin,
pen p=currentpen, filltype filltype=NoFill) {
return new frame(frame f) {
box(f,xmargin,ymargin,p,filltype,above=false);
return f;
};
}
struct animation {
picture[] pictures;
string[] files;
int index;
string prefix;
bool global; // If true, use a global scaling for all frames; this requires
// extra memory since the actual shipout is deferred until all frames have
// been generated.
void operator init(string prefix="", bool global=true) {
prefix=replace(stripdirectory(outprefix(prefix))," ","_");
this.prefix=prefix;
this.global=global;
}
string basename(string prefix=stripextension(prefix)) {
return "_"+prefix;
}
string name(string prefix, int index) {
return stripextension(prefix)+"+"+string(index);
}
private string nextname() {
string name=basename(name(prefix,index));
++index;
return name;
}
void shipout(string name=nextname(), frame f) {
string format=nativeformat();
plain.shipout(name,f,format=format,view=false);
files.push(name+"."+format);
}
void add(picture pic=currentpicture, enclosure enclosure=NoBox) {
if(global) {
++index;
pictures.push(pic.copy());
} else this.shipout(enclosure(pic.fit()));
}
void purge(bool keep=settings.keep) {
if(!keep) {
for(int i=0; i < files.length; ++i)
delete(files[i]);
}
}
int merge(int loops=0, real delay=animationdelay, string format="gif",
string options="", bool keep=settings.keep) {
string args="-loop " +(string) loops+" -delay "+(string)(delay/10)+
" -alpha Off -dispose Background "+options;
for(int i=0; i < files.length; ++i)
args += " " +files[i];
int rc=convert(args,prefix+"."+format,format=format);
this.purge(keep);
if(rc == 0) animate(file=prefix+"."+format,format=format);
else abort("merge failed");
return rc;
}
void glmovie(string prefix=prefix, projection P=currentprojection) {
if(!view() || settings.render == 0 || settings.outformat == "html") return;
fit(prefix,pictures,view=true,P);
}
// Export all frames with the same scaling.
void export(string prefix=prefix, enclosure enclosure=NoBox,
bool multipage=false, bool view=false,
projection P=currentprojection) {
if(pictures.length == 0) return;
if(!global) multipage=false;
bool inlinetex=settings.inlinetex;
if(multipage)
settings.inlinetex=false;
frame multi;
frame[] fits=fit(prefix,pictures,view=false,P);
for(int i=0; i < fits.length; ++i) {
string s=name(prefix,i);
if(multipage) {
add(multi,enclosure(fits[i]));
newpage(multi);
files.push(s+"."+nativeformat());
} else {
if(pictures[i].empty3() || settings.render <= 0)
this.shipout(s,enclosure(fits[i]));
else // 3D frames
files.push(s+"."+nativeformat());
}
}
if(multipage) {
plain.shipout(prefix,multi,view=view);
settings.inlinetex=inlinetex;
}
}
string load(int frames, real delay=animationdelay, string options="",
bool multipage=false) {
if(!global) multipage=false;
string s="\animategraphics["+options+"]{"+format("%.18f",1000/delay,"C")+
"}{"+basename();
if(!multipage) s += "+";
s += "}{0}{"+string(frames-1)+"}";
return s;
}
bool pdflatex()
{
return latex() && pdf();
}
string pdf(enclosure enclosure=NoBox, real delay=animationdelay,
string options="", bool keep=settings.keep, bool multipage=true) {
settings.twice=true;
if(settings.inlinetex) multipage=true;
if(!global) multipage=false;
if(!pdflatex())
abort("inline pdf animations require -tex pdflatex or -tex xelatex");
if(settings.outformat != "") settings.outformat="pdf";
string filename=basename();
string pdfname=filename+".pdf";
if(global)
export(filename,enclosure,multipage=multipage);
if(!keep) {
exitfcn currentexitfunction=atexit();
void exitfunction() {
if(currentexitfunction != null) currentexitfunction();
if(multipage || !settings.inlinetex)
this.purge();
if(multipage && !settings.inlinetex)
delete(pdfname);
}
atexit(exitfunction);
}
if(!multipage)
delete(pdfname);
return load(index,delay,options,multipage);
}
int movie(enclosure enclosure=NoBox, int loops=0, real delay=animationdelay,
string format=settings.outformat == "" ? "gif" : settings.outformat,
string options="", bool keep=settings.keep) {
if(global) {
if(format == "pdf") {
export(enclosure,multipage=true,view=true);
return 0;
}
export(enclosure);
}
return merge(loops,delay,format,options,keep);
}
}
animation operator init() {
animation a=animation();
return a;
}
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