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//---------------------------------------------------------------------------
// graph.cpp: graph plot subfunctions
//---------------------------------------------------------------------------
#include <vcl.h>
#include <math.h>
#pragma hdrstop
#include "rtklib.h"
#include "graph.h"
#define MINSIZE 10 // min width/height
#define MINSCALE 2E-5 // min scale factor (pixel/unit)
#define MAXSCALE 1E7 // max scale factor (pixel/unit)
#define SIZEORIGIN 6
#define MIN(x,y) ((x)<(y)?(x):(y))
#define MAX(x,y) ((x)>(y)?(x):(y))
// constructor --------------------------------------------------------------
TGraph::TGraph(TPaintBox *parent)
{
TPoint point;
Parent=parent; X=Y=0; Width=parent->Width; Height=parent->Height;
XCent =YCent =0.0; // center coordinate (unit)
XScale=YScale=0.02; // scale factor (unit/pixel)
Box=1; // show box (0:off,1:on)
Fit=1; // fit scale on resize (0:off,1:on):
XGrid=YGrid=1; // show grid (0:off,1:on)
XTick=YTick=0.0; // grid interval (unit) (0:auto)
XLPos=YLPos=1; // grid label pos (0:off,1:outer,2:inner,
// 3:outer-rot,4:inner-rot,5/6:time,7:axis)
Week=0; // gpsweek no. for time label
Title=XLabel=YLabel=""; // lable string ("":no label)
Color[0]=Parent->Color; // background color
Color[1]=clGray; // grid color
Color[2]=clBlack; // title/label color
p_=point; mark_=0; color_=clBlack; size_=0; rot_=0;
}
// --------------------------------------------------------------------------
int TGraph::IsInArea(TPoint &p)
{
return X<=p.x&&p.x<X+Width&&Y<=p.y&&p.y<Y+Height;
}
//---------------------------------------------------------------------------
int TGraph::ToPoint(double x, double y, TPoint &p)
{
const double xt=0.1;
x=X+(Width-1)/2.0+(x-XCent)/XScale;
y=Y+(Height-1)/2.0-(y-YCent)/YScale;
p.x=(int)floor(x+0.5); p.y=(int)floor(y+0.5);
return X-xt<x&&x<X+Width-1+xt&&Y-xt<y&&y<Y+Height-1+xt;
}
//---------------------------------------------------------------------------
void TGraph::ToPos(TPoint p, double &x, double &y)
{
x=XCent+(p.x-X-(Width-1)/2.0)*XScale;
y=YCent-(p.y-Y-(Height-1)/2.0)*YScale;
}
//---------------------------------------------------------------------------
void TGraph::SetPos(TPoint p1, TPoint p2)
{
int w=p2.x-p1.x+1,h=p2.y-p1.y+1;
if (w<MINSIZE) w=MINSIZE; if (h<MINSIZE) h=MINSIZE;
if (Fit) {
XScale*=(double)(Width-1)/(w-1);
YScale*=(double)(Height-1)/(h-1);
}
X=p1.x; Y=p1.y; Width=w; Height=h;
};
//---------------------------------------------------------------------------
void TGraph::GetPos(TPoint &p1, TPoint &p2)
{
p1.x=X; p1.y=Y; p2.x=X+Width-1; p2.y=Y+Height-1;
};
//---------------------------------------------------------------------------
void TGraph::SetCent(double x, double y)
{
XCent=x; YCent=y;
}
//---------------------------------------------------------------------------
void TGraph::GetCent(double &x, double &y)
{
x=XCent; y=YCent;
}
//---------------------------------------------------------------------------
void TGraph::SetRight(double x, double y)
{
// XCent=x-(double)(Width-1)*XScale*0.5; YCent=y;
XCent=x-(double)(Width-13)*XScale*0.5; YCent=y;
}
//---------------------------------------------------------------------------
void TGraph::GetRight(double &x, double &y)
{
// x=XCent+(double)(Width-1)*XScale*0.5; y=YCent;
x=XCent+(double)(Width-13)*XScale*0.5; y=YCent;
}
//---------------------------------------------------------------------------
void TGraph::SetScale(double xs, double ys)
{
if (xs<MINSCALE) xs=MINSCALE; else if (MAXSCALE<xs) xs=MAXSCALE;
if (ys<MINSCALE) ys=MINSCALE; else if (MAXSCALE<ys) ys=MAXSCALE;
XScale=xs; YScale=ys;
}
//---------------------------------------------------------------------------
void TGraph::GetScale(double &xs, double &ys)
{
xs=XScale; ys=YScale;
}
//---------------------------------------------------------------------------
void TGraph::SetLim(const double *xl, const double *yl)
{
if (xl[0]<xl[1]) {XCent=(xl[0]+xl[1])/2.0; XScale=(xl[1]-xl[0])/(Width-1);}
if (yl[0]<yl[1]) {YCent=(yl[0]+yl[1])/2.0; YScale=(yl[1]-yl[0])/(Height-1);}
}
//---------------------------------------------------------------------------
void TGraph::GetLim(double *xl, double *yl)
{
TPoint p0(X,Y),p1(X+Width-1,Y+Height-1);
ToPos(p0,xl[0],yl[1]); ToPos(p1,xl[1],yl[0]);
}
//---------------------------------------------------------------------------
void TGraph::SetTick(double xt, double yt)
{
XTick=xt; YTick=yt;
}
//---------------------------------------------------------------------------
void TGraph::GetTick(double &xt, double &yt)
{
xt=XTick>0.0?XTick:(XLPos==5||XLPos==6?AutoTickTime(XScale):AutoTick(XScale));
yt=YTick>0.0?YTick:AutoTick(YScale);
}
//---------------------------------------------------------------------------
double TGraph::AutoTick(double scale)
{
double t[]={1.0,2.0,5.0,10.0},tick=30.0*scale;
double order=pow(10.0,floor(log10(tick)));
for (int i=0;i<4;i++) if (tick<=t[i]*order) return t[i]*order;
return 10.0;
}
//---------------------------------------------------------------------------
double TGraph::AutoTickTime(double scale)
{
double t[]={0.1,0.2,0.5,1.0,3.0,6.0,12.0,30.0,60.0,300.0,900.0,1800.0,3600.0,
7200.0,10800.0,21600.0,43200.0,86400.0,86400.0*2,86400.0*7,86400.0*14,
86400.0*35,86400.0*70};
double tick=60.0*scale;
for (int i=0;i<(int)(sizeof(t)/sizeof(*t));i++) if (tick<=t[i]) return t[i];
return 86400.0*140;
}
//---------------------------------------------------------------------------
AnsiString TGraph::NumText(double x, double dx)
{
AnsiString s;
int n=(int)(0.9-log10(dx));
return s.sprintf("%.*f",n<0?0:n,x);
}
//---------------------------------------------------------------------------
AnsiString TGraph::TimeText(double x, double dx)
{
AnsiString s;
char str[64];
time2str(gpst2time(Week,x),str,1);
int b=dx<86400.0?11:(dx<86400.0*30?5:2),w=dx<60.0?(dx<1.0?10:8):5;
return s.sprintf("%*.*s",w,w,str+b);
}
//---------------------------------------------------------------------------
void TGraph::DrawGrid(double xt, double yt)
{
TCanvas *c=Parent->Canvas;
double xl[2],yl[2];
TPoint p;
GetLim(xl,yl);
c->Pen->Color=Color[1]; c->Brush->Style=bsClear;
if (XGrid) {
for (int i=(int)ceil(xl[0]/xt);i*xt<=xl[1];i++) {
ToPoint(i*xt,0.0,p);
c->Pen->Style=i!=0?psDot:psSolid;
c->MoveTo(p.x,Y); c->LineTo(p.x,Y+Height-1);
}
}
if (YGrid) {
for (int i=(int)ceil(yl[0]/yt);i*yt<=yl[1];i++) {
ToPoint(0.0,i*yt,p);
c->Pen->Style=i!=0?psDot:psSolid;
c->MoveTo(X,p.y); c->LineTo(X+Width-1,p.y);
}
}
DrawMark(0.0,0.0,0,Color[1],SIZEORIGIN,0);
}
//---------------------------------------------------------------------------
void TGraph::DrawGridLabel(double xt, double yt)
{
double xl[2],yl[2];
TPoint p;
GetLim(xl,yl);
if (XLPos) {
for (int i=(int)ceil(xl[0]/xt);i*xt<=xl[1];i++) {
if (XLPos<=4) {
ToPoint(i*xt,yl[0],p); if (XLPos==1) p.y-=1;
int ha=XLPos<=2?0:(XLPos==3?2:1),va=XLPos>=3?0:(XLPos==1?2:1);
DrawText(p,NumText(i*xt,xt),Color[2],ha,va,XLPos>=3?90:0);
}
else if (XLPos==6) {
ToPoint(i*xt,yl[0],p);
DrawText(p,TimeText(i*xt,xt),Color[2],0,2,0);
}
else if (XLPos==7) {
if (i==0) continue;
ToPoint(i*xt,0.0,p);
DrawText(p,NumText(i*xt,xt),Color[2],0,2,0);
}
}
}
if (YLPos) {
for (int i=(int)ceil(yl[0]/yt);i*yt<=yl[1];i++) {
if (YLPos<=4) {
ToPoint(xl[0],i*yt,p);
int ha=YLPos>=3?0:(YLPos==1?2:1),va=YLPos<=2?0:(YLPos==3?1:2);
DrawText(p,NumText(i*yt,yt),Color[2],ha,va,YLPos>=3?90:0);
}
else if (YLPos==7) {
if (i==0) continue;
ToPoint(0.0,i*yt,p); p.x+=2;
DrawText(p,NumText(i*yt,yt),Color[2],1,0,0);
}
}
}
}
//---------------------------------------------------------------------------
void TGraph::DrawBox(void)
{
TCanvas *c=Parent->Canvas;
if (Box) {
c->Pen->Color=Color[1]; c->Pen->Style=psSolid; c->Brush->Style=bsClear;
c->Rectangle(X,Y,X+Width-1,Y+Height-1);
}
}
//---------------------------------------------------------------------------
void TGraph::DrawLabel(void)
{
if (XLabel!="") {
TPoint p(X+Width/2,Y+Height+(XLPos%2?10:2));
DrawText(p,XLabel,Color[2],0,2,0);
}
if (YLabel!="") {
TPoint p(X-(YLPos%2?20:2),Y+Height/2);
DrawText(p,YLabel,Color[2],0,1,90);
}
if (Title!="") {
TPoint p(X+Width/2,Y-1);
DrawText(p,Title,Color[2],0,1,0);
}
}
//---------------------------------------------------------------------------
void TGraph::DrawAxis(int label, int glabel)
{
TCanvas *c=Parent->Canvas;
double xt,yt;
GetTick(xt,yt);
c->Pen->Color=Color[0]; c->Pen->Style=psSolid;
c->Brush->Color=Color[0]; c->Brush->Style=bsSolid;
DrawGrid(xt,yt);
if (xt/XScale<50.0&&XLPos<=2) xt*=XLPos==5?4.0:2.0;
if (yt/YScale<50.0&&YLPos>=3) yt*=2.0;
if (glabel) DrawGridLabel(xt,yt);
DrawBox();
if (label) DrawLabel();
}
//---------------------------------------------------------------------------
void TGraph::RotPoint(TPoint *ps, int n, TPoint pc, int rot, TPoint *pr)
{
for (int i=0;i<n;i++) {
pr[i].x=pc.x+(int)floor(ps[i].x*cos(rot*D2R)-ps[i].y*sin(rot*D2R)+0.5);
pr[i].y=pc.y-(int)floor(ps[i].x*sin(rot*D2R)+ps[i].y*cos(rot*D2R)+0.5);
}
}
//---------------------------------------------------------------------------
void TGraph::DrawMark(TPoint p, int mark, TColor color, int size, int rot)
{
// mark = mark ( 0: dot (.), 1: circle (o), 2: rect (#), 3: cross (x)
// 4: line (-), 5: plus (+), 10: arrow (->),
// 11: hscale, 12: vscale, 13: compass)
// rot = rotation angle (deg)
// if the same mark already drawn, skip it
if (p.x==p_.x&&p.y==p_.y&&mark==mark_&&color==color_&&size==size_&&
rot==rot_) {
return;
}
p_=p; mark_=mark; color_=color; size_=size; rot_=rot;
TCanvas *c=Parent->Canvas;
if (size<1) size=1;
int n,s=size/2;
int x1=p.x-s,x2=x1+size+1,y1=p.y-s,y2=y1+size+1;
int xs1[]={-7,0,-7,0},ys1[]={2,0,-2,0};
int xs2[]={-1,-1,-1,1,1,1},ys2[]={-1,1,0,0,-1,1};
int xs3[]={3,-4,0,0,0,-8,8},ys3[]={0,5,20,-20,-10,-10,-10};
TPoint ps[32],pr[32],pd(0,size/2+12),pt;
c->Pen->Color=color; c->Pen->Style=psSolid; c->Brush->Color=color;
switch (mark) {
case 0: // dot
c->Brush->Style=bsSolid;
c->Ellipse(x1,y1,x2,y2);
return;
case 1: // circle
c->Brush->Style=bsClear;
c->Ellipse(x1,y1,x2,y2);
return;
case 2: // rectangle
c->Brush->Style=bsClear;
c->Rectangle(x1,y1,x2,y2);
return;
case 3: // cross
c->Brush->Style=bsClear;
c->MoveTo(x1,y1); c->LineTo(x2,y2);
c->MoveTo(x1,y2); c->LineTo(x2,y1);
return;
case 4: // line
n=2;
ps[0].x=-size/2; ps[0].y=0; ps[1].x=size/2; ps[1].y=0;
break;
case 5: // plus
c->Brush->Style=bsClear;
c->MoveTo(x1,p.y); c->LineTo(x2,p.y);
c->MoveTo(p.x,y2); c->LineTo(p.x,y1);
return;
case 10: // arrow
n=6;
ps[0].x=-size/2; ps[0].y=0; ps[1].x=size/2; ps[1].y=0;
for (int i=2;i<n;i++) {
ps[i].x=size/2+xs1[i-2]; ps[i].y=ys1[i-2];
}
break;
case 11: // hscale
case 12: // vscale
n=6;
for (int i=0;i<n;i++) {
int x=xs2[i]*size/2,y=ys2[i]*5;
ps[i].x=mark==11?x:y; ps[i].y=mark==11?y:x;
}
break;
case 13: // compass
n=7;
for (int i=0;i<n;i++) {
ps[i].x=xs3[i]*size/40; ps[i].y=ys3[i]*size/40;
}
RotPoint(&pd,1,p,rot,&pt);
DrawText(pt,"N",color,0,0,rot);
break;
default:
return;
}
c->Brush->Style=bsClear;
RotPoint(ps,n,p,rot,pr);
DrawPoly(pr,n,color,0);
}
//---------------------------------------------------------------------------
void TGraph::DrawMark(double x, double y, int mark, TColor color, int size,
int rot)
{
TPoint p;
if (ToPoint(x,y,p)) DrawMark(p,mark,color,size,rot);
}
//---------------------------------------------------------------------------
void TGraph::DrawMark(TPoint p, int mark, TColor color, TColor bgcolor,
int size, int rot)
{
TPoint p1;
p1=p; p1.x--; DrawMark(p1,mark,bgcolor,size,rot); // draw with hemming
p1=p; p1.x++; DrawMark(p1,mark,bgcolor,size,rot);
p1=p; p1.y--; DrawMark(p1,mark,bgcolor,size,rot);
p1=p; p1.y++; DrawMark(p1,mark,bgcolor,size,rot);
DrawMark(p,mark,color,size,rot);
}
//---------------------------------------------------------------------------
void TGraph::DrawMark(double x, double y, int mark, TColor color,
TColor bgcolor, int size, int rot)
{
TPoint p;
if (ToPoint(x,y,p)) DrawMark(p,mark,color,bgcolor,size,rot);
}
//---------------------------------------------------------------------------
void TGraph::DrawMarks(const double *x, const double *y, const TColor *color,
int n, int mark, int size, int rot)
{
TPoint p,pp;
for (int i=0;i<n;i++) {
if (!ToPoint(x[i],y[i],p)||(pp.x==p.x&&pp.y==p.y)) continue;
DrawMark(p,mark,color[i],size,rot);
pp=p;
}
}
//---------------------------------------------------------------------------
void TGraph::DrawText(TPoint p, AnsiString str, TColor color, int ha, int va,
int rot)
{
// str = UTF-8 string
// ha = horizontal alignment (0: center, 1: left, 2: right)
// va = vertical alignment (0: center, 1: bottom, 2: top )
// rot = rotation angle (deg)
wchar_t buff[1024]={0};
::MultiByteToWideChar(CP_UTF8,0,str.c_str(),-1,buff,2048);
UnicodeString u_str(buff);
TCanvas *c=Parent->Canvas;
AnsiString Font_Name=c->Font->Name;
LOGFONT lf={0};
lf.lfHeight=c->Font->Height;
lf.lfCharSet=c->Font->Charset;
strcpy(lf.lfFaceName,Font_Name.c_str());
lf.lfEscapement=lf.lfOrientation=rot*10;
c->Font->Handle=CreateFontIndirect(&lf);
TSize off=c->TextExtent(u_str);
TPoint ps,pr;
ps.x=ha==0?(-off.cx+1)/2:(ha==1?3:-off.cx-3);
ps.y=va==0?(off.cy+1)/2:(va==1?off.cy+1:-2);
RotPoint(&ps,1,p,rot,&pr);
c->Brush->Style=bsClear;
c->Font->Color=color;
c->TextOut(pr.x,pr.y,u_str);
}
//---------------------------------------------------------------------------
void TGraph::DrawText(double x, double y, AnsiString str, TColor color,
int ha, int va, int rot)
{
TPoint p;
ToPoint(x,y,p);
DrawText(p,str,color,ha,va,rot);
}
//---------------------------------------------------------------------------
void TGraph::DrawText(TPoint p, AnsiString str, TColor color, TColor bgcolor,
int ha, int va, int rot)
{
TPoint p1;
p1=p; p1.x--; DrawText(p1,str,bgcolor,ha,va,rot); // draw with hemming
p1=p; p1.x++; DrawText(p1,str,bgcolor,ha,va,rot);
p1=p; p1.y--; DrawText(p1,str,bgcolor,ha,va,rot);
p1=p; p1.y++; DrawText(p1,str,bgcolor,ha,va,rot);
DrawText(p,str,color,ha,va,rot);
}
//---------------------------------------------------------------------------
void TGraph::DrawText(double x, double y, AnsiString str, TColor color,
TColor bgcolor, int ha, int va, int rot)
{
TPoint p;
ToPoint(x,y,p);
DrawText(p,str,color,bgcolor,ha,va,rot);
}
//---------------------------------------------------------------------------
void TGraph::DrawCircle(TPoint p, TColor color, int rx, int ry, int style)
{
TCanvas *c=Parent->Canvas;
TPenStyle ps[]={psSolid,psDot,psDash,psDashDot,psDashDotDot};
int x1=p.x-rx,x2=p.x+rx,y1=p.y-ry,y2=p.y+ry;
c->Pen->Color=color; c->Pen->Style=ps[style]; c->Brush->Style=bsClear;
c->Ellipse(x1,y1,x2,y2);
}
//---------------------------------------------------------------------------
void TGraph::DrawCircle(double x, double y, TColor color, double rx,
double ry, int style)
{
TPoint p;
ToPoint(x,y,p);
DrawCircle(p,color,(int)(rx/XScale+0.5),(int)(ry/YScale+0.5),style);
}
//---------------------------------------------------------------------------
void TGraph::DrawCircles(int label)
{
TCanvas *c=Parent->Canvas;
TPoint p;
double xl[2],yl[2],xt,yt,x2,y2,r;
GetLim(xl,yl);
x2=MAX(xl[0]*xl[0],xl[1]*xl[1]);
y2=MAX(yl[0]*yl[0],yl[1]*yl[1]);
r=sqrt(x2+y2);
GetTick(xt,yt);
for (int i=(int)floor(r/xt);i>0;i--) {
DrawCircle(0.0,0.0,Color[1],i*xt,i*xt,1);
}
ToPoint(0.0,0.0,p);
c->Pen->Style=psSolid;
c->MoveTo(p.x,Y); c->LineTo(p.x,Y+Height-1);
c->MoveTo(X,p.y); c->LineTo(X+Width-1,p.y);
DrawMark(0.0,0.0,0,Color[1],SIZEORIGIN,0);
if (xt/XScale<50.0) xt*=2.0;
if (yt/YScale<50.0) yt*=2.0;
if (label) DrawGridLabel(xt,yt);
DrawBox();
}
//---------------------------------------------------------------------------
int TGraph::OnAxis(TPoint p)
{
// area code : 5 4 6
// 1 0 2
// 9 8 10
int xmin=X,xmax=X+Width-1,ymin=Y,ymax=Y+Height-1;
return (p.x<xmin?1:(p.x<=xmax?0:2))+(p.y<ymin?4:(p.y<=ymax?0:8));
}
//---------------------------------------------------------------------------
int TGraph::ClipPoint(TPoint *p0, int area, TPoint *p1)
{
int x,y,xmin=X,xmax=X+Width-1,ymin=Y,ymax=Y+Height-1;
if (area&1) { // left
y=p0->y+(p1->y-p0->y)*(xmin-p0->x)/(p1->x-p0->x);
if (ymin<=y&&y<=ymax) {p0->x=xmin; p0->y=y; return 1;}
}
if (area&2) { // right
y=p0->y+(p1->y-p0->y)*(xmax-p0->x)/(p1->x-p0->x);
if (ymin<=y&&y<=ymax) {p0->x=xmax; p0->y=y; return 1;}
}
if (area&4) { // upper
x=p0->x+(p1->x-p0->x)*(ymin-p0->y)/(p1->y-p0->y);
if (xmin<=x&&x<=xmax) {p0->x=x; p0->y=ymin; return 1;}
}
if (area&8) { // lower
x=p0->x+(p1->x-p0->x)*(ymax-p0->y)/(p1->y-p0->y);
if (xmin<=x&&x<=xmax) {p0->x=x; p0->y=ymax; return 1;}
}
return 0;
}
//---------------------------------------------------------------------------
void TGraph::DrawPolyline(TPoint *p, int n)
{
// avoid overflow of points
for (int i=0;i<n-1;i+=30000,p+=30000) {
Parent->Canvas->Polyline(p,n-i>30000?30000:n-i-1);
}
}
//---------------------------------------------------------------------------
void TGraph::DrawPoly(TPoint *p, int n, TColor color, int style)
{
TCanvas *c=Parent->Canvas;
TPenStyle ps[]={psSolid,psDot,psDash,psDashDot,psDashDotDot};
c->Pen->Color=color; c->Pen->Style=ps[style]; c->Brush->Style=bsClear;
int i,j,area0=11,area1;
for (i=j=0;j<n;j++,area0=area1) {
if ((area1=OnAxis(p[j]))==area0) continue;
if (!area1) i=j; else if (!area0) DrawPolyline(p+i,j-i);
if (j<=0||(area0&area1)) continue;
TPoint pc[2]={p[j-1],p[j]};
if (area0&&!ClipPoint(pc, area0,p+j )) continue;
if (area1&&!ClipPoint(pc+1,area1,p+j-1)) continue;
DrawPolyline(pc,2);
}
if (!area0) DrawPolyline(p+i,j-i);
}
//---------------------------------------------------------------------------
void TGraph::DrawPoly(double *x, double *y, int n, TColor color, int style)
{
TPoint *p=new TPoint[n];
int m=0;
for (int i=0;i<n;i++) {
ToPoint(x[i],y[i],p[m]);
if (m==0||p[m-1].x!=p[m].x||p[m-1].y!=p[m].y) m++;
}
DrawPoly(p,m,color,style);
delete [] p;
}
//---------------------------------------------------------------------------
void TGraph::DrawPatch(TPoint *p, int n, TColor color1, TColor color2,
int style)
{
TCanvas *c=Parent->Canvas;
TPenStyle ps[]={psSolid,psDot,psDash,psDashDot,psDashDotDot};
c->Pen->Color=color1;
c->Pen->Style=ps[style];
c->Brush->Style=bsSolid;
c->Brush->Color=color2;
c->Polygon(p,n);
}
//---------------------------------------------------------------------------
void TGraph::DrawPatch(double *x, double *y, int n, TColor color1,
TColor color2, int style)
{
TPoint *p=new TPoint[n];
for (int i=0;i<n;i++) {
ToPoint(x[i],y[i],p[i]);
}
DrawPatch(p,n,color1,color2,style);
delete [] p;
}
//---------------------------------------------------------------------------
void TGraph::DrawSkyPlot(TPoint p, TColor color1, TColor color2, int size)
{
TCanvas *c=Parent->Canvas;
c->Pen->Color=color1; c->Brush->Style=bsClear;
AnsiString s,dir[]={"N","E","S","W"};
TPoint ps;
int r=size/2;
for (int el=0;el<90;el+=15) {
int ys=r-r*el/90;
c->Pen->Style=el==0?psSolid:psDot;
c->Ellipse(p.x-ys,p.y-ys,p.x+ys,p.y+ys);
if (el<=0) continue;
ps.x=p.x; ps.y=p.y-ys;
s.sprintf("%d",el);
DrawText(ps,s,color2,1,0,0);
}
c->Pen->Style=psDot; c->Font->Color=color2;
for (int az=0,i=0;az<360;az+=30) {
ps.x=p.x+(int)( r*sin(az*D2R)+0.5);
ps.y=p.y+(int)(-r*cos(az*D2R)+0.5);
c->MoveTo(p.x,p.y); c->LineTo(ps.x,ps.y);
ps.x+= 3*sin(az*D2R);
ps.y+=-3*cos(az*D2R);
s.sprintf("%d",az); if (!(az%90)) s=dir[i++];
DrawText(ps,s,color2,0,1,-az);
}
}
//---------------------------------------------------------------------------
void TGraph::DrawSkyPlot(double x, double y, TColor color1, TColor color2,
double size)
{
TPoint p;
ToPoint(x,y,p);
DrawSkyPlot(p,color1,color2,size/XScale);
}
//---------------------------------------------------------------------------
void TGraph::DrawSkyPlot(TPoint p, TColor color1, TColor color2,
TColor bgcolor, int size)
{
TCanvas *c=Parent->Canvas;
c->Pen->Color=color1; c->Brush->Style=bsClear;
AnsiString s,dir[]={"N","E","S","W"};
TPoint ps;
int n,r=size/2;
for (int el=0;el<90;el+=15) {
int ys=r-r*el/90;
c->Pen->Style=el==0?psSolid:psDot;
c->Ellipse(p.x-ys,p.y-ys,p.x+ys,p.y+ys);
if (el<=0) continue;
ps.x=p.x; ps.y=p.y-ys;
s.sprintf("%d",el);
DrawText(ps,s,color2,bgcolor,1,0,0);
}
c->Pen->Style=psDot; c->Font->Color=color2;
for (int az=0,i=0;az<360;az+=30) {
ps.x=p.x+(int)( r*sin(az*D2R)+0.5);
ps.y=p.y+(int)(-r*cos(az*D2R)+0.5);
c->MoveTo(p.x,p.y); c->LineTo(ps.x,ps.y);
ps.x+= 3*sin(az*D2R);
ps.y+=-3*cos(az*D2R);
s.sprintf("%d",az); if (!(az%90)) s=dir[i++];
DrawText(ps,s,color2,bgcolor,0,1,-az);
}
}
//---------------------------------------------------------------------------
void TGraph::DrawSkyPlot(double x, double y, TColor color1, TColor color2,
TColor bgcolor, double size)
{
TPoint p;
ToPoint(x,y,p);
DrawSkyPlot(p,color1,color2,bgcolor,size/XScale);
}
//---------------------------------------------------------------------------
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