[ C++ ] Drawing Program.

**Max_Payne** · 12-21-2007, 10:07 AM

I made a program that prints dots and lines in a Page. So far that's all i could come up with.
When i try to print the lines and the dots it just prints consecutive points,I want it to print the points & lines in the page's coordinates.

I have been stuck for a long time now. Please Help.

Point.h

Code:

#pragma once

#include <iostream>
using namespace std;

class Point
{
private:
	int x;
	int y;

public:
	Point(void);
	Point( int x, int y );
	Point( const Point &xPoint );
	~Point(void);

	void setX( int x );
	int getX() const;

	void setY( int y );
	int getY() const;

	Point & operator = ( const Point &xPoint );

	bool operator == ( const Point &xPoint ) const;

	bool includes( int cord_X, int cord_Y ) const;
	bool includes( const Point &xPoint ) const;

	void draw() const;
};

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

Point.cpp

Code:

#include "Point.h"

Point::Point( void )
{
	this->x = 0;
	this->y = 0;
}

Point::Point( int x, int y )
{
	this->x = x;
	this->y = y;
}

Point::Point( const Point &xPoint )
{
	this->x = xPoint.x;
	this->y = xPoint.y;
}

Point::~Point( void ) {}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

void Point::setX( int x ) // set X
{
	this->x = x;
}

void Point::setY( int y ) // set Y
{
	this->y = y;
}


int Point::getX() const // get X
{
	return ( this->x );
}

int Point::getY() const // get Y
{
	return ( this->y );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

Point &Point::operator = ( const Point &xPoint )
{
	if( this != &xPoint )
    {
		this->x = xPoint.x;
		this->y = xPoint.y;
    }

    return ( *this );
}

bool Point::includes( int cord_X, int cord_Y ) const
{
	return ( this->x == cord_X && this->y == cord_Y );
}

void Point::draw() const
{
	cout << '.';
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

bool Point::operator == ( const Point &xPoint ) const
{
    bool isEquality = false;
    if( this->x == xPoint.x && this->y == xPoint.y )
    {
	isEquality = true;
    }
    return isEquality;
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

PointCollection.h

Code:

#pragma once

#include "Point.h"

const int MAXPoint = 100;

class PointCollection
{
private:
	Point pts[ MAXPoint ];
	int quantity;

public:
	PointCollection( void );
	PointCollection( const PointCollection &xPointCollection );
	~PointCollection( void );

	// To know how many Points are
	// ..in the collection
	int size() const; 

	PointCollection operator = ( const PointCollection &xPointCollection );

	PointCollection &operator + ( const Point &xPoint );
	
	Point &operator[]( int index );
	const Point &operator[]( int index ) const;

	bool isFull() const;
	bool isEmpty() const;

	bool includes( const Point &xPoint ) const;
	int indexOf( const Point &xPoint ) const;
};

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

PointCollection.cpp

Code:

#include "PointCollection.h"

PointCollection::PointCollection( void )
{
	this->quantity = 0;
}

PointCollection::PointCollection( const PointCollection &xPointCollection )
{
	this->quantity = xPointCollection.quantity;

	for ( int i = 0 ; i < this->quantity ; i++ )
		( this->pts )[ i ] = ( xPointCollection.pts )[ i ];
}

PointCollection::~PointCollection( void ) {}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

int PointCollection::size() const
{
	return ( this->quantity );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

Point &PointCollection::operator []( int index )
{
	return ( ( this->pts )[ index ] );
}

const Point &PointCollection::operator []( int index ) const
{
	return ( ( this->pts )[ index ] );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

PointCollection PointCollection::operator =( const PointCollection &xPointCollection )
{
	this->quantity = xPointCollection.quantity;

	for ( int i = 0 ; i < this->quantity ; i++ )
		( this->pts )[ i ] = ( xPointCollection.pts )[ i ];

	return ( *this );
}

PointCollection &PointCollection::operator +( const Point &xPoint )
{
	(*this)[ this->quantity ] = xPoint;

	(this->quantity)++;

	return ( *this );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

bool PointCollection::isFull() const
{
	return ( this->quantity == MAXPoint );
}

bool PointCollection::isEmpty() const
{
	return ( this->quantity == 0 );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

bool PointCollection::includes( const Point &xPoint ) const
{
	bool thisOne = false;

	for ( int i = 0 ; i < this->quantity && ! thisOne ; i++ )
	{
		if( pts[ i ] == xPoint )
			thisOne = true;
	}

	return ( thisOne );
}

int PointCollection::indexOf( const Point &xPoint ) const
{
	int index = -1;

	for ( int i = 0 ; i < this->quantity && index == -1 ; i++ )
	{
		if( pts[ i ] == xPoint )
			index = i;
	}

	return ( index );
}

Line.h

Code:

#pragma once

#include "Point.h"

class Linea
{
private:
	Point begin;
	Point end;

public:
	Linea( void );
	Linea( const Linea &xLinea );
	Linea( Point XY1, Point XY2 );
	~Linea( void );

	Linea &operator = ( const Linea &xLinea );

	bool includes( int cord_X, int cord_Y ) const;
	bool operator == ( const Linea &xLinea ) const;

	double m() const; // Pendiente
	double b() const; // Intercept in Y

	bool isVertical() const;
	bool isHorizontal() const;
	bool isDiagonal() const;

	void draw() const;
};

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

Line.cpp

Code:

#include "Linea.h"

Linea::Linea()
{
}

Linea::Linea( Point XY1, Point XY2 ) 
{
	this->begin = begin;
	this->end = end;
}

Linea::Linea( const Linea &xLinea )
{
	this->begin = xLinea.begin;
	this->end = xLinea.end;
}

Linea::~Linea( void )
{
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

Linea &Linea::operator =( const Linea &xLinea )
{
	if( this != &xLinea )
    {
		this->begin = xLinea.begin;
		this->end = xLinea.end;
    }

    return ( *this );
}

bool Linea::operator == ( const Linea &xLinea ) const
{
    bool isEquality = false;
    if( this->begin == xLinea.begin &&
		this->end == xLinea.end )
    {
	isEquality = true;
    }
    return isEquality;
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

double Linea::m()const
{
	return ( (this->end.getY()) - (this->begin.getY()) ) / ((this->end.getX()) - (this->begin.getX()) );
}

double Linea::b()const
{
	return ( this->end.getY() - (this->m() * this->end.getX()) );
}


bool Linea::isVertical () const
{
	return ( ( (this->end.getX()) - (this->begin.getX()) ) == 0 );
}

bool Linea::isHorizontal () const
{
	return ( ( (this->end.getY()) - (this->begin.getY()) ) == 0 );
}

bool Linea::isDiagonal () const
{
	return ( this->isVertical() && this->isHorizontal() );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

bool Linea::includes( int cord_X, int cord_Y ) const
{
	bool included = false;

	if ( this->isHorizontal() )
	{
		if ( ( (this->begin).getY() == cord_Y ) && 

		     ( (this->begin).getX() <= cord_X ) &&

		     ( (this->end).getX() >= cord_X ) ||

		     ( (this->begin).getX() >= cord_X ) &&

		     ( (this->end).getX() <= cord_X ) )

				included = true;
	}

	else if ( this->isVertical() )
	{
		if ( ( (this->begin).getX() == cord_X ) && 

		     ( (this->begin).getY() <= cord_Y ) && 

		     ( (this->end).getY() >= cord_Y ) ||

		     ( (this->begin).getY() >= cord_Y ) && 
			 
			 ( (this->end).getY() <= cord_Y ) )

				included = true;
	}

	else
	{
		if ( ( cord_Y == this->m() * cord_X + this->b() ) && 

			( (this->begin).getX() <= cord_X ) && 
			
			( (this->end).getX() >= cord_X ) || 
			
			( (this->begin).getX() >= cord_X ) &&

			( (this->end).getY() >= cord_Y ) ||

			( (this->begin).getY() >= cord_Y ) &&

			( (this->end).getY() <= cord_Y ) )

				included = true;
	}

	return ( included );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

void Linea::draw() const
{
	cout << '.';
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

LineCollectoin.h

Code:

#pragma once

#include "Linea.h"

const int MAX = 100;

class LineCollection
{
private:
	Linea lc[ MAX ];
	int quantity;

public:
	LineCollection(void);
	LineCollection( const LineCollection &xLineCollection );
	~LineCollection(void);

	// To know how many Lines are
	// ..in the collection
	int size() const;

	LineCollection operator = ( const LineCollection &xLineCollection );

	LineCollection &operator + ( const Linea &xLinea );

	Linea &operator [] ( int index );
	const Linea &operator[]( int index ) const;

	bool isFull() const;
	bool isEmpty() const;

	bool includes( const Linea &xLinea ) const;
	int indexOF( const Linea &xLinea ) const;

	friend ostream &operator << ( ostream &output, const LineCollection &xLineCollection );
	friend istream &operator >> ( istream &input, LineCollection &xLineCollection );
};

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

LineCollection.cpp

Code:

#include "LineCollection.h"

LineCollection::LineCollection( void )
{
	this->quantity = 0;
}

LineCollection::LineCollection( const LineCollection &xLineCollection )
{
	this->quantity = xLineCollection.quantity;

	for ( int i = 0 ; i < this->quantity ; i++ )
		( this->lc )[ i ] = ( xLineCollection.lc )[ i ];
}

LineCollection::~LineCollection( void ) {}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

int LineCollection::size() const
{
	return ( this->quantity );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

Linea &LineCollection::operator []( int index )
{
	return ( ( this->lc )[ index ] );
}

const Linea &LineCollection::operator []( int index ) const
{
	return ( ( this->lc )[ index ] );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

LineCollection LineCollection::operator =( const LineCollection &xLineCollection )
{
	this->quantity = xLineCollection.quantity;

	for ( int i = 0 ; i < this->quantity ; i++ )
		( this->lc )[ i ] = ( xLineCollection.lc )[ i ];

	return ( *this );
}

LineCollection &LineCollection::operator +( const Linea &xLinea ) 
{
	(*this)[ this->quantity ] = xLinea;
	(this->quantity)++;

	return ( *this );
}


/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

bool LineCollection::isFull() const
{
	return ( this->quantity == MAX );
}

bool LineCollection::isEmpty() const
{
	return ( this->quantity == 0 );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////


bool LineCollection::includes(const Linea &xLinea) const
{
	bool thisOne = false;

	for ( int i = 0 ; i < this->quantity && ! thisOne ; i++ )
	{
		if ( lc[i] == xLinea )
			thisOne = true;
	}
	return ( thisOne );
}

int LineCollection::indexOF( const Linea &xLinea ) const
{
	int index = -1;

	for ( int i = 0 ; i < this->quantity && index == -1 ; i++ )
	{
		if ( lc[i] == xLinea )
			index = i;
	}

	return ( index );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

Page.h

Code:

#pragma once

#include "PointCollection.h"
#include "LineCollection.h"

const int MAXPAGE = 100;

class Page
{
private:
	int heigh;
	int width;

public:
	Page( void );
	Page( int width, int heigh );
	Page( const Page &xPage );
	~Page( void );

	void setWidth( int width );
	int getWidth() const;

	void setHeigh( int heigh );
	int getHeigh() const;

	bool operator == ( const Page &xPage ) const;

	void draw() const;
};

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

Page.cpp

Code:

#include "Page.h"

Page::Page( void )
{
	this->width = 0;
	this->heigh = 0;
}

Page::Page( int width, int heigh )
{
	this->width = width;
	this->heigh = heigh;
}

Page::Page( const Page &xPage )
{
	this->width = xPage.width;
	this->heigh = xPage.heigh;
}

Page::~Page( void ) {}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

void Page::setHeigh( int heigh )
{
	this->heigh = heigh;
}

void Page::setWidth( int width )
{
	this->width = width;
}

int Page::getHeigh() const
{
	return ( this->heigh );
}

int Page::getWidth() const
{
	return ( this->width );
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

void Page::draw() const
{
	bool included;
	PointCollection pc;
	LineCollection li;

	for( int y = 0 ; y < this->heigh ; y++ )
	{
		included = false;

		for ( int x = 0; x < this->width ; x++ )
		{
			for ( int p = 0 ; p < pc.size()  && !included ; p++ )
			{

				if ( pc[ p ].includes( x, y ) )
				{
					pc[ p ].draw();
					included = true;
				}

				if ( included )
					cout << ' ';
			}

			for ( int line = 0 ; line < li.size()  && !included ; line++ )
			{

				if ( li[ line ].includes( x, y ) )
				{
					li[ line ].draw();
					included = true;
				}

				if ( included )
					cout << ' ';
			}

		}
		cout << endl;
	}
}

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

bool Page::operator ==( const Page &xPage ) const
{
	bool isEquality = false;

	if( this->heigh == xPage.heigh && this->width == xPage.width )
    {
		isEquality = true;
    }

    return isEquality;
}

Main.cpp

Code:

#include "Page.h"

int main ()
{
	
	Point p1( 5, 5 ), p2( 1, 1 );
	Linea L;
	Page pg( 15, 15 );

	p1.draw();

	pg.draw();

	/*
	if ( p1.includes( 1, 1 ) == true )
		cout << "Point 1 & 2 are Equal" << "\n\n";
	else
		cout << "Point 1 & 2 are NOT Equal" << "\n\n";
	*/

	system("PAUSE");
	return 0;

}

**dargueta** · 01-21-2008, 11:24 AM

If I'm reading this right, you're doing this in a console application. You can't really draw all that well on a console application without changing the video mode, so lines will show up as a series of points.

**WingedPanther** · 01-22-2008, 09:11 AM

C++ does not support the idea of locating a cursor position on the screen. As a result, you generally need to store ALL screen information in an array and redraw the array to screen to "refresh" the display.

**dargueta** · 01-22-2008, 07:06 PM

I disagree. You can use WinAPI - SetConsoleCursorPosition() to change the cursor position, like so:

Code:

#include <windows.h>

HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
COORD cursorLoc;

cursorLoc.X = myXCoord;
cursorLoc.Y = myYCoord;

SetConsoleCursorPosition(hOut,cursorLoc);

**v0id** · 01-22-2008, 11:13 PM

I think WingedPanther meant the language itself. C++ does not have any support for locating the cursor position. In your code example you're communicating with the Win32 API - which by the way is pure C code.

**WingedPanther** · 01-23-2008, 08:42 AM

Exactly, Void.

Granted, the WinAPI is extremely powerful and useful, but it isn't C/C++. This is where we start getting into code the works, but is not platform independent.

**dargueta** · 01-23-2008, 07:18 PM

Right...I learned C first, never really made the full transition into C++...I still use printf and stuff. Sorry about that. But it does work, and Max_Payne never really mentioned multi-system compatibility, so it's a viable solution, just not exactly the way I phrased it.