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import geomerative.*;
class bezierstroke {
float startsize,endsize,linewidth,mpfract,raisefract,bezierfract;
bezierstroke(float _s,float _e,float _l,float _m,float _r,float _b){
startsize=_s;
endsize=_e;
linewidth=_l;
mpfract=_m;
raisefract=_r;
bezierfract=_b;
}
void drawstroke(RPoint start,RPoint end) {
ellipse(start.x,start.y,startsize,startsize);
ellipse(end.x,end.y,endsize,endsize);
RPoint mp=new RPoint(start.x+((end.x-start.x)*mpfract),(start.y+((end.y-start.y)*mpfract))-((getHeight()-(start.y+((end.y-start.y)*mpfract)))*raisefract));
RPoint bv=new RPoint((end.x-start.x)*bezierfract,(end.y-start.y)*bezierfract);
RPoint b1=new RPoint(mp.x-bv.x,mp.y-bv.y);
RPoint b2=new RPoint(mp.x+bv.x,mp.y+bv.y);
beginShape();
vertex(start.x,start.y);
bezierVertex(start.x,start.y,b1.x,b1.y-(linewidth/2),mp.x,mp.y-(linewidth/2));
bezierVertex(b2.x,b2.y-(linewidth/2),end.x,end.y,end.x,end.y);
bezierVertex(end.x,end.y,b2.x,b2.y+(linewidth/2),mp.x,mp.y+(linewidth/2));
bezierVertex(b1.x,b1.y+(linewidth/2),start.x,start.y,start.x,start.y);
endShape();
}
}
RPoint perpoint(RPoint p1,RPoint p2,float d) {
//returns a point left distance d of perpendicular line between points
float h=atan2(p2.y-p1.y,p2.x-p1.x);
return new RPoint(p2.x+(cos(h+HALF_PI)*d),p2.y+(sin(h+HALF_PI)*d));
}
class gradientstroke {
float startsize,endsize,mpfract,raisefract,bezierfract;
float[] transpos;
float[] transamt;
color col;
gradientstroke(float _s,float _e,float[] _p, float[] _a,color _c){
startsize=_s;
endsize=_e;
transpos=_p;
transamt=_a;
col=_c;
}
void drawstroke(RPoint Sp,RPoint Ep) {
drawstroke(Sp,Ep,col);
}
void drawstroke(RPoint Sp,RPoint Ep,color _col) {
noStroke();
fill(red(_col),green(_col),blue(_col),255);
//put ellipses in a seperate layer
//ellipse(Sp.x,Sp.y,startsize,startsize);
//ellipse(Ep.x,Ep.y,endsize,endsize);
//construct quads along path
//path is straight, curve comes from 3D/ raise
//how to deal with badly formatted control arrays? bother?
//3d stage in between
noFill();
float spos=0.0;
float step=.004; //optimise
//quad corner points
//these are perpedicular on the screen as we are making a gradient line system
RPoint L0,L1,p0,p1,p2,p3;
p0=new RPoint(0,0);
p1=p0;
L0=Sp;
boolean notfirst=false;
for (int i=0;i<transpos.length-1;i++) {
float transeg=transpos[i+1]-transpos[i];
for (float u=0;u<transeg-step;u+=step) {
float gradamt=u/transeg;
float b=255.0*((transamt[i]*(1-gradamt))+(transamt[i+1]*gradamt));
//find new point on line
L1=new RPoint(lerp(Sp.x,Ep.x,transpos[i]+u),lerp(Sp.y,Ep.y,transpos[i]+u));
float lw=lerp(startsize,endsize,transpos[i]+u)/2;
p2=perpoint(L0,L1,lw);
p3=perpoint(L0,L1,-lw);
if (notfirst) {
fill(red(_col),green(_col),blue(_col),b);
beginShape();
vertex(p0.x,p0.y);
vertex(p2.x,p2.y);
vertex(p3.x,p3.y);
vertex(p1.x,p1.y);
endShape();
}
notfirst=true;
p0=p2;
p1=p3;
L0=L1;
/*
//temporarily draw line in 2D
strokeWeight(((1-(transpos[i]+u))*startsize)+((transpos[i]+u)*endsize));
stroke(red(col),green(col),blue(col),b);
line(lerp(Sp.x,Ep.x,transpos[i]+u),lerp(Sp.y,Ep.y,transpos[i]+u),;
*/
}
}
}
}
class gradientstroke3D {
float startsize,endsize,mpfract,raisefract,bezierfract;
float[] transpos;
float[] transamt;
color col;
sphereMap smap;
float hw,hh;
gradientstroke3D(float _s,float _e,float[] _p, float[] _a,color _c,sphereMap _sp){
startsize=_s;
endsize=_e;
transpos=_p;
transamt=_a;
col=_c;
smap=_sp;
hw=(getWidth()/2);
hh=(getHeight()/2);
}
void drawstroke(RPoint Sp,RPoint Ep) {
drawstroke(Sp,Ep,col);
}
void drawstroke(RPoint Sp,RPoint Ep,color _col) {
noStroke();
fill(red(_col),green(_col),blue(_col),255);
//put ellipses in a seperate layer
//ellipse(Sp.x,Sp.y,startsize,startsize);
//ellipse(Ep.x,Ep.y,endsize,endsize);
//construct quads along path
//path is straight, curve comes from 3D/ raise
//how to deal with badly formatted control arrays? bother?
//3d stage in between
noFill();
float spos=0.0;
float step=.01; //optimise
//quad corner points
//these are perpedicular on the screen as we are making a gradient line system
RPoint L0,L1,p0,p1,p2,p3;
p0=new RPoint(0,0);
p1=p0;
L0=Sp;
int iteration=0;
for (int i=0;i<transpos.length-1;i++) {
float transeg=transpos[i+1]-transpos[i];
for (float u=0;u<transeg-step;u+=step) {
float gradamt=u/transeg;
float b=255.0*((transamt[i]*(1-gradamt))+(transamt[i+1]*gradamt));
//find new point on line
L1=smap.per(new RPoint(lerp(Sp.x,Ep.x,transpos[i]+u),lerp(Sp.y,Ep.y,transpos[i]+u)),4+(sin((transpos[i]+u)*PI)*0.1));
float lw=lerp(startsize,endsize,transpos[i]+u)/2;
p2=perpoint(L0,L1,lw);
p3=perpoint(L0,L1,-lw);
if (iteration>1) {
fill(red(_col),green(_col),blue(_col),b);
beginShape();
vertex(p0.x+hw,p0.y+hh);
vertex(p2.x+hw,p2.y+hh);
vertex(p3.x+hw,p3.y+hh);
vertex(p1.x+hw,p1.y+hh);
endShape();
}
iteration++;
p0=p2;
p1=p3;
L0=L1;
/*
//temporarily draw line in 2D
strokeWeight(((1-(transpos[i]+u))*startsize)+((transpos[i]+u)*endsize));
stroke(red(col),green(col),blue(col),b);
line(lerp(Sp.x,Ep.x,transpos[i]+u),lerp(Sp.y,Ep.y,transpos[i]+u),;
*/
}
}
}
}
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