/*
 * MathPlanner 3.1 - Mathematical design tool.
 * Copyright(C) 2002  Jarmo Nikkanen
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation.
 *
 * You should have received a copy of the GNU General Public License with this program.
 *
 */

#include <qpoint.h>
#include <qpen.h>
#include <qpainter.h>
#include <qrect.h>
#include <math.h>


float radians(float ang)
{
return(ang*2*3.141592654/360);
}


QPoint line_cross_point(QPoint a,float aaa,QPoint b,float aab)
{
  QPoint point;
  float x,y,da,db,aa,ab;
  aa=radians(aaa);
  ab=radians(aab);

  float ax=a.x();
  float ay=a.y();

  float bx=b.x();
  float by=b.y();

  
  if (aa!=ab) {
  
  if (cos(aa)==0) y=ay,x=bx+((y-by)*sin(ab)/cos(ab));
  else
  if (cos(ab)==0) y=by,x=ax+((y-ay)*sin(aa)/cos(aa));
  else
  if (sin(aa)==0) x=ax,y=by+((x-bx)*cos(ab)/sin(ab));
  else
  if (sin(ab)==0) x=bx,y=ay+((x-ax)*cos(aa)/sin(aa));
  else {
  da=cos(aa)/sin(aa);
  db=cos(ab)/sin(ab);
  x=floor((by-ay+(da*ax)-(db*bx))/(da-db));
  y=floor(ay+(da*(x-ax)));
  }
  point=QPoint((int)x,(int)y);
  }
  else point=QPoint(0,0);
  
  return(point);
}  


QPoint cal_point(QPoint origo,float lenght,float angle)
{
float ox=origo.x();
float oy=origo.y();

float x=ox+lenght*sin(radians(angle));
float y=oy+lenght*cos(radians(angle));

return(QPoint((int)x,(int)y));
}  


void draw_complex_angle(QRect in,QPainter *paint,int st)
{

 float height=in.height();
 float width=in.width();
 float x=in.left();
 float y=in.top();

 float a=30;
 if (height>25) a=180*atan(14/height)/3.1415;

 float ang=360-a;

 float he=height/cos(radians(a));
 float wi=height*tan(radians(a));

 QPoint point[10];

 point[0]=QPoint((int)x,(int)y);
 point[1]=cal_point(point[0],he,ang);
 point[2]=point[1]+QPoint((int)(width+wi),0);

 QPen pen=paint->pen();
 pen.setWidth((int)st);
 paint->setPen(pen);
 paint->moveTo(point[0]);
 paint->lineTo(point[1]);
 paint->lineTo(point[2]);
}



void complex_angle_size(QRect in,QRect *size)
{
 float height=in.height();
 float width=in.width();
 float x=in.left();
 float y=in.top();

 float a=30;
 if (height>25) a=180*atan(14/height)/3.1415;

 float ang=360-a;

 float he=height/cos(radians(a));
 float wi=height*tan(radians(a));

 QPoint point[10];
 point[0]=QPoint((int)x,(int)y);
 point[1]=cal_point(point[0],he,ang);
 point[2]=cal_point(point[1],width+wi,90);

 float w=point[2].x()-point[1].x();
 float h=point[1].y()-point[0].y();
 QRect rect((int)(x+width-w-1),in.y(),(int)(w+2),(int)h+2);

 *size=rect;
}


void square_root_size(QRect in,int *hei,int *hei_b,int *wid,int *hdp,int *dp,int *po)
{
 float height=in.height();
 float width=in.width();
 float x=in.left();
 float y=in.top();

 float ang=10;
 float ang2=20;


 QPoint point[12];

 point[0]=QPoint((int)(x+width),(int)y);
 point[1]=point[0]-QPoint((int)width,0);
 point[2]=cal_point(point[1],height/cos(radians(ang)),360-ang);
 point[3]=cal_point(point[2],height/(cos(radians(ang2))*2),180+ang2);

 *hei=point[2].y()-point[1].y();
 *hei_b=point[2].y()-((int)y);
 *wid=point[0].x()-point[3].x();
 *hdp=point[2].y()-point[3].y();
 *dp=point[2].x()-point[3].x();
 *po=point[1].x()-point[3].x();
}

void draw_square_root(QRect in,QPainter *paint,int st)
{
 float height=in.height();
 float width=in.width();
 float x=in.left();
 float y=in.top();

 float ang=10;
 float ang2=20;


 QPoint point[12];

 point[0]=QPoint((int)(x+width),(int)y);
 point[1]=point[0]-QPoint((int)width,0);
 point[2]=cal_point(point[1],height/cos(radians(ang)),360-ang);
 point[3]=cal_point(point[2],height/(cos(radians(ang2))*2),180+ang2);

 QPen pen=paint->pen();
 pen.setWidth((int)st);
 paint->setPen(pen);
 paint->moveTo(point[0]);
 paint->lineTo(point[1]);
 paint->lineTo(point[2]);
 paint->lineTo(point[3]);
}