restricted bool inXasyMode=false; bool diagnostics=false; void report(string text) { if(diagnostics) write(text); } void report(transform t) { if(diagnostics) write(t); } void report(int i) { if(diagnostics) write(i); } void initXasyMode() { size(0,0); inXasyMode=true; } void exitXasyMode() { inXasyMode=false; } private picture[] tempStore; private picture newPic; void startScript() { tempStore.push(currentpicture.copy()); newPic=new picture; currentpicture=newPic; } void endScript() { if(tempStore.length < 1) { abort("endScript() without matching beginScript()"); } else { currentpicture=tempStore.pop(); add(currentpicture,newPic.fit(),group=false); } shipped=false; } struct indexedTransform { int index; transform t; bool active; void operator init(int index, transform t, bool active=true) { this.index=index; this.t=t; this.active=active; } } struct framedTransformStack { struct transact { transform t; bool active; void operator init(transform t, bool active=true) { this.t=t; this.active=active; } void operator init(indexedTransform i){ this.t=i.t; this.active=i.active; } void operator init() { this.t=identity(); this.active=true; } } private transact[] stack; private int[] frames; private int stackBase=0; transform pop() { if(stack.length == 0) return identity(); else { transform popped=stack[0].t; stack.delete(0); report("Popped"); report(popped); return popped; } } transform pop0() { if(stack.length == 0) return identity(); else { static transform zerotransform=(0,0,0,0,0,0); transform popped=stack[0].active ? stack[0].t : zerotransform; stack.delete(0); report("Popped"); report(popped); return popped; } } void push(transform t, bool Active=true) { report("Pushed"); report(t); stack.push(transact(t,Active)); } void add(... indexedTransform[] tList) { transact[] toPush; for(int a=0; a < tList.length; ++a) toPush[tList[a].index]=transact(tList[a]); for(int a=0; a < toPush.length; ++a) if(!toPush.initialized(a)) toPush[a]=transact(); report("Added"); report(toPush.length); stack.append(toPush); } } framedTransformStack xformStack; void deconstruct(picture pic=currentpicture, real magnification=1) { deconstruct(pic.fit(),currentpatterns,magnification,xformStack.pop); }