// ---------------------------------------------------------------------------
//
// ------------
void bSmoothElement::makecurve( float *xpts,
float *ypts,
int npts,
int *cur,
curve *crv,
int level,
float *lastx,
float *lasty){
curve left,right;
if(level>0){
left.startx=crv->startx;
left.starty=crv->starty;
mid(&left.controlx,&left.controly,crv->startx,crv->starty,crv->controlx,crv->controly);
mid(&right.controlx,&right.controly,crv->controlx,crv->controly,crv->endx,crv->endy);
mid(&left.endx,&left.endy,left.controlx,left.controly,right.controlx,right.controly);
right.startx=left.endx;
right.starty=left.endy;
right.endx=crv->endx;
right.endy=crv->endy;
makecurve(xpts,ypts,npts,cur,&left,level-1,lastx,lasty);
makecurve(xpts,ypts,npts,cur,&right,level-1,lastx,lasty);
}
else{
xpts[(*cur)]=crv->endx;
ypts[(*cur)]=crv->endy;
(*lastx)=crv->endx;
(*lasty)=crv->endy;
(*cur)++;
}
}
// QBezierOutline makes a quadratic bezier curve, outlined
void QbezierOutline(VGfloat sx, VGfloat sy, VGfloat cx, VGfloat cy, VGfloat ex, VGfloat ey) {
VGubyte segments[] = { VG_MOVE_TO_ABS, VG_QUAD_TO };
VGfloat coords[] = { sx, sy, cx, cy, ex, ey };
makecurve(segments, coords, VG_STROKE_PATH);
}
// CBezier makes a quadratic bezier curve
void Cbezier(VGfloat sx, VGfloat sy, VGfloat cx, VGfloat cy, VGfloat px, VGfloat py, VGfloat ex, VGfloat ey) {
VGubyte segments[] = { VG_MOVE_TO_ABS, VG_CUBIC_TO };
VGfloat coords[] = { sx, sy, cx, cy, px, py, ex, ey };
makecurve(segments, coords, VG_FILL_PATH | VG_STROKE_PATH);
}
// ---------------------------------------------------------------------------
//
// -----------
bool bSmoothElement::smooth_one(float* xpts,
float* ypts,
float* newxpts,
float* newypts,
int npts,
int* gcurs){
if(npts<3){
if(npts==2){
newxpts[0]=xpts[0];
newxpts[1]=xpts[1];
newypts[0]=ypts[0];
newypts[1]=ypts[1];
gcurs+=2;
}
return(true);
}
int n=npts-1;
bool closed=((xpts[0]==xpts[npts-1])&&(ypts[0]==ypts[npts-1]));
int curs,i,bkcurs,nnewpts=npts*16L+((int)closed);
float x1,x2,x3,y1,y2,y3,lastx,lasty,firstx,firsty;
curve crv;
curs=0;
for(i=1;i<=n-(int)(!closed);i++){
x1=xpts[i-1];
y1=ypts[i-1];
x2=xpts[i];
y2=ypts[i];
if(i==n){
x3=xpts[1];
y3=ypts[1];
}
else{
x3=xpts[i+1];
y3=ypts[i+1];
}
if((!closed)&&(i==1)){
newxpts[curs]=lastx=x1;
newypts[curs]=lasty=y1;
curs++;
(*gcurs)++;
}
if((closed)||(i!=1)){
mid(&x1,&y1,x1,y1,x2,y2);
}
if((closed)||(i!=n-1)){
mid(&x3,&y3,x2,y2,x3,y3);
}
if((closed)&&(i==1)){
newxpts[curs]=firstx=lastx=x1;
newypts[curs]=firsty=lasty=y1;
curs++;
(*gcurs)++;
}
if(((x1==x2)&&(y1==y2))||((x2==x3)&&(y2==y3))){
continue;
}
crv.startx=x1;
crv.starty=y1;
crv.controlx=x2;
crv.controly=y2;
crv.endx=x3;
crv.endy=y3;
bkcurs=curs;
makecurve(newxpts,newypts,nnewpts,&curs,&crv,4,&lastx,&lasty);
(*gcurs)+=(curs-bkcurs);
}
if(closed){
newxpts[curs]=newxpts[0];
newypts[curs]=newypts[0];
(*gcurs)++;
}
return(true);
}