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geometry.cpp
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2002-11-13
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/////////////////////////////////////////////////////////////////////////////
// Name: common/geometry.cpp
// Purpose: Common Geometry Classes
// Author: Stefan Csomor
// Modified by:
// Created: 08/05/99
// RCS-ID:
// Copyright: (c) 1999 Stefan Csomor
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#pragma implementation "geometry.cpp"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_GEOMETRY
#include "wx/log.h"
#include <string.h>
#include "wx/geometry.h"
#include "wx/datstrm.h"
// normally this is defined in <math.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
//
// wxPoint2D
//
//
// wxRect2D
//
// wxDouble version
// for the following calculations always remember
// that the right and bottom edges are not part of a rect
bool wxRect2DDouble::Intersects( const wxRect2DDouble &rect ) const
{
wxDouble left,right,bottom,top;
left = wxMax ( m_x , rect.m_x );
right = wxMin ( m_x+m_width, rect.m_x + rect.m_width );
top = wxMax ( m_y , rect.m_y );
bottom = wxMin ( m_y+m_height, rect.m_y + rect.m_height );
if ( left < right && top < bottom )
{
return TRUE;
}
return FALSE;
}
void wxRect2DDouble::Intersect( const wxRect2DDouble &src1 , const wxRect2DDouble &src2 , wxRect2DDouble *dest )
{
wxDouble left,right,bottom,top;
left = wxMax ( src1.m_x , src2.m_x );
right = wxMin ( src1.m_x+src1.m_width, src2.m_x + src2.m_width );
top = wxMax ( src1.m_y , src2.m_y );
bottom = wxMin ( src1.m_y+src1.m_height, src2.m_y + src2.m_height );
if ( left < right && top < bottom )
{
dest->m_x = left;
dest->m_y = top;
dest->m_width = right - left;
dest->m_height = bottom - top;
}
else
{
dest->m_width = dest->m_height = 0;
}
}
void wxRect2DDouble::Union( const wxRect2DDouble &src1 , const wxRect2DDouble &src2 , wxRect2DDouble *dest )
{
wxDouble left,right,bottom,top;
left = wxMin ( src1.m_x , src2.m_x );
right = wxMax ( src1.m_x+src1.m_width, src2.m_x + src2.m_width );
top = wxMin ( src1.m_y , src2.m_y );
bottom = wxMax ( src1.m_y+src1.m_height, src2.m_y + src2.m_height );
dest->m_x = left;
dest->m_y = top;
dest->m_width = right - left;
dest->m_height = bottom - top;
}
void wxRect2DDouble::Union( const wxPoint2DDouble &pt )
{
wxDouble x = pt.m_x;
wxDouble y = pt.m_y;
if ( x < m_x )
{
SetLeft( x );
}
else if ( x < m_x + m_width )
{
// contained
}
else
{
SetRight( x );
}
if ( y < m_y )
{
SetTop( y );
}
else if ( y < m_y + m_height )
{
// contained
}
else
{
SetBottom( y );
}
}
void wxRect2DDouble::ConstrainTo( const wxRect2DDouble &rect )
{
if ( GetLeft() < rect.GetLeft() )
SetLeft( rect.GetLeft() );
if ( GetRight() > rect.GetRight() )
SetRight( rect.GetRight() );
if ( GetBottom() > rect.GetBottom() )
SetBottom( rect.GetBottom() );
if ( GetTop() < rect.GetTop() )
SetTop( rect.GetTop() );
}
// integer version
// for the following calculations always remember
// that the right and bottom edges are not part of a rect
// wxPoint2D
void wxPoint2DInt::WriteTo( wxDataOutputStream &stream ) const
{
stream.Write32( m_x );
stream.Write32( m_y );
}
void wxPoint2DInt::ReadFrom( wxDataInputStream &stream )
{
m_x = stream.Read32();
m_y = stream.Read32();
}
wxDouble wxPoint2DInt::GetVectorAngle() const
{
if ( m_x == 0 )
{
if ( m_y >= 0 )
return 90;
else
return 270;
}
if ( m_y == 0 )
{
if ( m_x >= 0 )
return 0;
else
return 180;
}
// casts needed for MIPSpro compiler under SGI
wxDouble deg = atan2( (double)m_y , (double)m_x ) * 180 / M_PI;
if ( deg < 0 )
{
deg += 360;
}
return deg;
}
void wxPoint2DInt::SetVectorAngle( wxDouble degrees )
{
wxDouble length = GetVectorLength();
m_x = (int)(length * cos( degrees / 180 * M_PI ));
m_y = (int)(length * sin( degrees / 180 * M_PI ));
}
wxDouble wxPoint2DDouble::GetVectorAngle() const
{
if ( m_x == 0 )
{
if ( m_y >= 0 )
return 90;
else
return 270;
}
if ( m_y == 0 )
{
if ( m_x >= 0 )
return 0;
else
return 180;
}
wxDouble deg = atan2( m_y , m_x ) * 180 / M_PI;
if ( deg < 0 )
{
deg += 360;
}
return deg;
}
void wxPoint2DDouble::SetVectorAngle( wxDouble degrees )
{
wxDouble length = GetVectorLength();
m_x = length * cos( degrees / 180 * M_PI );
m_y = length * sin( degrees / 180 * M_PI );
}
// wxRect2D
bool wxRect2DInt::Intersects( const wxRect2DInt &rect ) const
{
wxInt32 left,right,bottom,top;
left = wxMax ( m_x , rect.m_x );
right = wxMin ( m_x+m_width, rect.m_x + rect.m_width );
top = wxMax ( m_y , rect.m_y );
bottom = wxMin ( m_y+m_height, rect.m_y + rect.m_height );
if ( left < right && top < bottom )
{
return TRUE;
}
return FALSE;
}
void wxRect2DInt::Intersect( const wxRect2DInt &src1 , const wxRect2DInt &src2 , wxRect2DInt *dest )
{
wxInt32 left,right,bottom,top;
left = wxMax ( src1.m_x , src2.m_x );
right = wxMin ( src1.m_x+src1.m_width, src2.m_x + src2.m_width );
top = wxMax ( src1.m_y , src2.m_y );
bottom = wxMin ( src1.m_y+src1.m_height, src2.m_y + src2.m_height );
if ( left < right && top < bottom )
{
dest->m_x = left;
dest->m_y = top;
dest->m_width = right - left;
dest->m_height = bottom - top;
}
else
{
dest->m_width = dest->m_height = 0;
}
}
void wxRect2DInt::Union( const wxRect2DInt &src1 , const wxRect2DInt &src2 , wxRect2DInt *dest )
{
wxInt32 left,right,bottom,top;
left = wxMin ( src1.m_x , src2.m_x );
right = wxMax ( src1.m_x+src1.m_width, src2.m_x + src2.m_width );
top = wxMin ( src1.m_y , src2.m_y );
bottom = wxMax ( src1.m_y+src1.m_height, src2.m_y + src2.m_height );
dest->m_x = left;
dest->m_y = top;
dest->m_width = right - left;
dest->m_height = bottom - top;
}
void wxRect2DInt::Union( const wxPoint2DInt &pt )
{
wxInt32 x = pt.m_x;
wxInt32 y = pt.m_y;
if ( x < m_x )
{
SetLeft( x );
}
else if ( x < m_x + m_width )
{
// contained
}
else
{
SetRight( x );
}
if ( y < m_y )
{
SetTop( y );
}
else if ( y < m_y + m_height )
{
// contained
}
else
{
SetBottom( y );
}
}
void wxRect2DInt::ConstrainTo( const wxRect2DInt &rect )
{
if ( GetLeft() < rect.GetLeft() )
SetLeft( rect.GetLeft() );
if ( GetRight() > rect.GetRight() )
SetRight( rect.GetRight() );
if ( GetBottom() > rect.GetBottom() )
SetBottom( rect.GetBottom() );
if ( GetTop() < rect.GetTop() )
SetTop( rect.GetTop() );
}
wxRect2DInt& wxRect2DInt::operator=( const wxRect2DInt &r )
{
m_x = r.m_x;
m_y = r.m_y;
m_width = r.m_width;
m_height = r.m_height;
return *this;
}
void wxRect2DInt::WriteTo( wxDataOutputStream &stream ) const
{
stream.Write32( m_x );
stream.Write32( m_y );
stream.Write32( m_width );
stream.Write32( m_height );
}
void wxRect2DInt::ReadFrom( wxDataInputStream &stream )
{
m_x = stream.Read32();
m_y = stream.Read32();
m_width = stream.Read32();
m_height = stream.Read32();
}
#endif // wxUSE_GEOMETRY