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| #pragma once
|
| #include "Pad.h"
|
| class CPolygonOffset
| {
| public:
| void Offset(CPadPoligon &from, CPadPoligon &to, int margin)
| {
| CPadPoint *pt1, *pt2, *pt3;
| int x, y;
| CPadPoint pt;
| to.ResetPoligon();
| for(int i= 0; i< from.GetPointCount(); i++)
| {
| pt1= from.GetPadPoint_Round(from.GetPreIndex(i));
| pt2= from.GetPadPoint_Round(i);
| pt3= from.GetPadPoint_Round(i+1);
| CrossLine(pt1->x, pt1->y, pt2->x, pt2->y, pt3->x, pt3->y, margin, pt.x, pt.y);
| //pt.x= pt2->x+ 10;
| //pt.y= pt2->y+ 10;
| to.AddPoint(pt);
| }
| to.CalOutRect();
| }
| BOOL CrossLine(int x1, int y1, int x2, int y2, int x3, int y3, int dist, int &crx, int &cry)
| {
| double xx1, yy1, xx2, yy2, xx22, yy22, xx3, yy3;
| trans(x1, y1, x2, y2, dist, xx1, yy1, xx2, yy2);
| trans(x2, y2, x3, y3, dist, xx22, yy22, xx3, yy3);
|
| double dx, dy, dx2, dy2;
| double slope, slope2, cross, cross2;
|
| dx= xx2 - xx1; dy= yy2 - yy1;
| if(dx == 0.)
| {
| slope= 0.;
| }else
| {
| slope= (double)dy/dx;
| }
| if(dy == 0.)
| {
| slope= 0.;
| }
| cross= -slope*xx1+ yy1;
|
| dx2= xx3 - xx22; dy2= yy3 - yy22;
| if(dx2 == 0.)
| {
| slope2= 0.;
| }else
| {
| slope2= (double)dy2/dx2;
| }
| if(dy2 == 0.)
| {
| slope2= 0.;
| }
| cross2= -slope2*xx22+ yy22;
|
| if(dx == 0.)
| {
| crx= xx2;
| cry= crx*slope2+ cross2;
| return FALSE;
| }
|
| if(dx2 == 0.)
| {
| crx= xx3;
| cry= crx*slope+ cross;
| return FALSE;
| }
|
| // if(dy == 0 && dy2 == 0)
| // crx= cross;
| // else
| double ccc= (double)(cross- cross2)/(slope2- slope);
| crx= ccc;
| cry= ccc*slope+ cross;
|
| return TRUE;
| }
| void trans(int x, int y, int xx, int yy, int dist, double &rx, double &ry, double &rxx, double &ryy)
| {
| int xxx, yyy;
| xxx= xx- x;
| yyy= yy- y;
| double slope;
|
| if(xxx == 0)
| {
| if(yyy > 0)
| dist= -dist;
| rx= x+ dist;
| ry= y;
| rxx= xx+ dist;
| ryy= yy;
| return;
| }else if(yyy == 0)
| {
| if(xxx < 0)
| dist= -dist;
| rx= x;
| ry= y+ dist;
| rxx= xx;
| ryy= yy+ dist;
| return;
| }
|
| slope= (double)yyy/xxx;
|
| double dim= ((double)dist*dist/(1.+ (double)1./(slope*slope)));
| dim= sqrt(dim);
| double dim2= ((double)dist*dist/(slope*slope+ 1));//dist/slope;
| dim2= sqrt(dim2);
|
| if(xxx > 0)
| {
| if(yyy > 0)
| {
| dim= -dim;
| }
| }else
| {
| if(yyy > 0)
| {
| dim= -dim;
| dim2= -dim2;
| }else
| {
| dim2= -dim2;
| }
| }
|
| rx= x+ dim;
| rxx= xx+ dim;
| ry= y+ dim2;
| ryy= yy+ dim2;
| }
| };
|
|
