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kicad/eeschema/lib_arc.cpp

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/*******************/
/** class LIB_ARC **/
/*******************/
#include "fctsys.h"
#include "gr_basic.h"
#include "common.h"
#include "class_drawpanel.h"
#include "plot_common.h"
#include "trigo.h"
#include "general.h"
#include "protos.h"
#include "lib_arc.h"
#include "transform.h"
//! @brief Given three points A B C, compute the circumcenter of the resulting triangle
//! reference: http://en.wikipedia.org/wiki/Circumscribed_circle
//! Coordinates of circumcenter in Cartesian coordinates
static wxPoint calcCenter( const wxPoint& A, const wxPoint& B, const wxPoint& C )
{
double circumCenterX, circumCenterY;
double Ax = (double) A.x;
double Ay = (double) A.y;
double Bx = (double) B.x;
double By = (double) B.y;
double Cx = (double) C.x;
double Cy = (double) C.y;
wxPoint circumCenter;
double D = 2.0 * ( Ax * ( By - Cy ) + Bx * ( Cy - Ay ) + Cx * ( Ay - By ) );
// prevent division / 0
if( fabs( D ) < 1e-7 )
D = 1e-7;
circumCenterX = ( (Ay * Ay + Ax * Ax) * (By - Cy) +
(By * By + Bx * Bx) * (Cy - Ay) +
(Cy * Cy + Cx * Cx) * (Ay - By) ) / D;
circumCenterY = ( (Ay * Ay + Ax * Ax) * (Cx - Bx) +
(By * By + Bx * Bx) * (Ax - Cx) +
(Cy * Cy + Cx * Cx) * (Bx - Ax) ) / D;
circumCenter.x = (int) circumCenterX;
circumCenter.y = (int) circumCenterY;
return circumCenter;
}
LIB_ARC::LIB_ARC( LIB_COMPONENT* aParent ) : LIB_DRAW_ITEM( COMPONENT_ARC_DRAW_TYPE, aParent )
{
m_Radius = 0;
m_t1 = 0;
m_t2 = 0;
m_Width = 0;
m_Fill = NO_FILL;
m_isFillable = true;
m_typeName = _( "Arc" );
m_editState = 0;
m_lastEditState = 0;
}
LIB_ARC::LIB_ARC( const LIB_ARC& aArc ) : LIB_DRAW_ITEM( aArc )
{
m_Radius = aArc.m_Radius;
m_t1 = aArc.m_t1;
m_t2 = aArc.m_t2;
m_Width = aArc.m_Width;
m_Fill = aArc.m_Fill;
m_Pos = aArc.m_Pos;
m_ArcStart = aArc.m_ArcStart;
m_ArcEnd = aArc.m_ArcEnd;
}
/**
* format:
* A centre_posx centre_posy rayon start_angle end_angle unit convert
* fill('N', 'F' ou 'f') startx starty endx endy
*/
bool LIB_ARC::Save( FILE* aFile )
{
int x1 = m_t1;
if( x1 > 1800 )
x1 -= 3600;
int x2 = m_t2;
if( x2 > 1800 )
x2 -= 3600;
if( fprintf( aFile, "A %d %d %d %d %d %d %d %d %c %d %d %d %d\n",
m_Pos.x, m_Pos.y, m_Radius, x1, x2, m_Unit, m_Convert, m_Width,
fill_tab[m_Fill], m_ArcStart.x, m_ArcStart.y, m_ArcEnd.x,
m_ArcEnd.y ) < 0 )
return false;
return true;
}
bool LIB_ARC::Load( char* aLine, wxString& aErrorMsg )
{
int startx, starty, endx, endy, cnt;
char tmp[256];
cnt = sscanf( &aLine[2], "%d %d %d %d %d %d %d %d %s %d %d %d %d",
&m_Pos.x, &m_Pos.y, &m_Radius, &m_t1, &m_t2, &m_Unit,
&m_Convert, &m_Width, tmp, &startx, &starty, &endx, &endy );
if( cnt < 8 )
{
aErrorMsg.Printf( _( "arc only had %d parameters of the required 8" ), cnt );
return false;
}
if( tmp[0] == 'F' )
m_Fill = FILLED_SHAPE;
if( tmp[0] == 'f' )
m_Fill = FILLED_WITH_BG_BODYCOLOR;
NORMALIZE_ANGLE( m_t1 );
NORMALIZE_ANGLE( m_t2 );
// Actual Coordinates of arc ends are read from file
if( cnt >= 13 )
{
m_ArcStart.x = startx;
m_ArcStart.y = starty;
m_ArcEnd.x = endx;
m_ArcEnd.y = endy;
}
else
{
// Actual Coordinates of arc ends are not read from file
// (old library), calculate them
m_ArcStart.x = m_Radius;
m_ArcStart.y = 0;
m_ArcEnd.x = m_Radius;
m_ArcEnd.y = 0;
RotatePoint( &m_ArcStart.x, &m_ArcStart.y, -m_t1 );
m_ArcStart.x += m_Pos.x;
m_ArcStart.y += m_Pos.y;
RotatePoint( &m_ArcEnd.x, &m_ArcEnd.y, -m_t2 );
m_ArcEnd.x += m_Pos.x;
m_ArcEnd.y += m_Pos.y;
}
return true;
}
/**
* Function HitTest
* tests if the given wxPoint is within the bounds of this object.
* @param aRefPoint A wxPoint to test in eeschema space
* @return bool - true if a hit, else false
*/
bool LIB_ARC::HitTest( const wxPoint& aRefPoint )
{
int mindist = m_Width ? m_Width / 2 : g_DrawDefaultLineThickness / 2;
// Have a minimal tolerance for hit test
if( mindist < MINIMUM_SELECTION_DISTANCE )
mindist = MINIMUM_SELECTION_DISTANCE;
return HitTest( aRefPoint, mindist, DefaultTransform );
}
/** Function HitTest
* @return true if the point aPosRef is near this object
* @param aRefPoint = a wxPoint to test
* @param aThreshold = max distance to this object (usually the half thickness
* of a line)
* @param aTransMat = the transform matrix
*/
bool LIB_ARC::HitTest( wxPoint aReferencePoint, int aThreshold, const TRANSFORM& aTransform )
{
// TODO: use aTransMat to calculates parameters
wxPoint relativePosition = aReferencePoint;
NEGATE( relativePosition.y ); // reverse Y axis
int distance = wxRound( EuclideanNorm( TwoPointVector( m_Pos, relativePosition ) ) );
if( abs( distance - m_Radius ) > aThreshold )
return false;
// We are on the circle, ensure we are only on the arc, i.e. between
// m_ArcStart and m_ArcEnd
wxPoint startEndVector = TwoPointVector( m_ArcStart, m_ArcEnd);
wxPoint startRelativePositionVector = TwoPointVector( m_ArcStart, relativePosition );
wxPoint centerStartVector = TwoPointVector( m_Pos, m_ArcStart );
wxPoint centerEndVector = TwoPointVector( m_Pos, m_ArcEnd );
wxPoint centerRelativePositionVector = TwoPointVector( m_Pos, relativePosition );
// Compute the cross product to check if the point is in the sector
int crossProductStart = CrossProduct( centerStartVector, centerRelativePositionVector );
int crossProductEnd = CrossProduct( centerEndVector, centerRelativePositionVector );
// The cross products need to be exchanged, depending on which side the center point
// relative to the start point to end point vector lies
if( CrossProduct( startEndVector, startRelativePositionVector ) < 0 )
{
EXCHG( crossProductStart, crossProductEnd );
}
// When the cross products have a different sign, the point lies in sector
// also check, if the reference is near start or end point
return HitTestPoints( m_ArcStart, relativePosition, MINIMUM_SELECTION_DISTANCE ) ||
HitTestPoints( m_ArcEnd, relativePosition, MINIMUM_SELECTION_DISTANCE ) ||
( crossProductStart <= 0 && crossProductEnd >= 0 );
}
LIB_DRAW_ITEM* LIB_ARC::DoGenCopy()
{
LIB_ARC* newitem = new LIB_ARC( GetParent() );
newitem->m_Pos = m_Pos;
newitem->m_ArcStart = m_ArcStart;
newitem->m_ArcEnd = m_ArcEnd;
newitem->m_Radius = m_Radius;
newitem->m_t1 = m_t1;
newitem->m_t2 = m_t2;
newitem->m_Width = m_Width;
newitem->m_Unit = m_Unit;
newitem->m_Convert = m_Convert;
newitem->m_Flags = m_Flags;
newitem->m_Fill = m_Fill;
return (LIB_DRAW_ITEM*) newitem;
}
int LIB_ARC::DoCompare( const LIB_DRAW_ITEM& aOther ) const
{
wxASSERT( aOther.Type() == COMPONENT_ARC_DRAW_TYPE );
const LIB_ARC* tmp = ( LIB_ARC* ) &aOther;
if( m_Pos.x != tmp->m_Pos.x )
return m_Pos.x - tmp->m_Pos.x;
if( m_Pos.y != tmp->m_Pos.y )
return m_Pos.y - tmp->m_Pos.y;
if( m_t1 != tmp->m_t1 )
return m_t1 - tmp->m_t1;
if( m_t2 != tmp->m_t2 )
return m_t2 - tmp->m_t2;
return 0;
}
void LIB_ARC::DoOffset( const wxPoint& aOffset )
{
m_Pos += aOffset;
m_ArcStart += aOffset;
m_ArcEnd += aOffset;
}
bool LIB_ARC::DoTestInside( EDA_Rect& aRect ) const
{
return aRect.Inside( m_ArcStart.x, -m_ArcStart.y )
|| aRect.Inside( m_ArcEnd.x, -m_ArcEnd.y );
}
void LIB_ARC::DoMove( const wxPoint& aPosition )
{
wxPoint offset = aPosition - m_Pos;
m_Pos = aPosition;
m_ArcStart += offset;
m_ArcEnd += offset;
}
void LIB_ARC::DoMirrorHorizontal( const wxPoint& aCenter )
{
m_Pos.x -= aCenter.x;
m_Pos.x *= -1;
m_Pos.x += aCenter.x;
m_ArcStart.x -= aCenter.x;
m_ArcStart.x *= -1;
m_ArcStart.x += aCenter.x;
m_ArcEnd.x -= aCenter.x;
m_ArcEnd.x *= -1;
m_ArcEnd.x += aCenter.x;
EXCHG( m_ArcStart, m_ArcEnd );
}
void LIB_ARC::DoPlot( PLOTTER* aPlotter, const wxPoint& aOffset, bool aFill,
const TRANSFORM& aTransform )
{
wxASSERT( aPlotter != NULL );
int t1 = m_t1;
int t2 = m_t2;
wxPoint pos = aTransform.TransformCoordinate( m_Pos ) + aOffset;
aTransform.MapAngles( &t1, &t2 );
if( aFill && m_Fill == FILLED_WITH_BG_BODYCOLOR )
{
aPlotter->set_color( ReturnLayerColor( LAYER_DEVICE_BACKGROUND ) );
aPlotter->arc( pos, -t2, -t1, m_Radius, FILLED_SHAPE, 0 );
}
bool already_filled = m_Fill == FILLED_WITH_BG_BODYCOLOR;
aPlotter->set_color( ReturnLayerColor( LAYER_DEVICE ) );
aPlotter->arc( pos, -t2, -t1, m_Radius, already_filled ? NO_FILL : m_Fill, GetPenSize() );
}
/** Function GetPenSize
* @return the size of the "pen" that be used to draw or plot this item
*/
int LIB_ARC::GetPenSize()
{
return ( m_Width == 0 ) ? g_DrawDefaultLineThickness : m_Width;
}
void LIB_ARC::drawEditGraphics( EDA_Rect* aClipBox, wxDC* aDC, int aColor )
{
// The edit indicators only get drawn when a new arc is being drawn.
if( ( m_Flags & IS_NEW ) == 0 )
return;
// Use the last edit state so when the drawing switches from the end mode to the center
// point mode, the last line between the center points gets erased.
if( m_lastEditState == 1 )
{
GRLine( aClipBox, aDC, m_ArcStart.x, -m_ArcStart.y, m_ArcEnd.x, -m_ArcEnd.y, 0, aColor );
}
else
{
GRDashedLine( aClipBox, aDC, m_ArcStart.x, -m_ArcStart.y, m_Pos.x, -m_Pos.y, 0, aColor );
GRDashedLine( aClipBox, aDC, m_ArcEnd.x, -m_ArcEnd.y, m_Pos.x, -m_Pos.y, 0, aColor );
}
}
void LIB_ARC::drawGraphic( WinEDA_DrawPanel* aPanel, wxDC* aDC, const wxPoint& aOffset,
int aColor, int aDrawMode, void* aData, const TRANSFORM& aTransform )
{
// Don't draw the arc until the end point is selected. Only the edit indicators
// get drawn at this time.
if( ( m_Flags & IS_NEW ) && m_lastEditState == 1 )
return;
wxPoint pos1, pos2, posc;
int color = ReturnLayerColor( LAYER_DEVICE );
if( aColor < 0 ) // Used normal color or selected color
{
if( ( m_Selected & IS_SELECTED ) )
color = g_ItemSelectetColor;
}
else
{
color = aColor;
}
pos1 = aTransform.TransformCoordinate( m_ArcEnd ) + aOffset;
pos2 = aTransform.TransformCoordinate( m_ArcStart ) + aOffset;
posc = aTransform.TransformCoordinate( m_Pos ) + aOffset;
int pt1 = m_t1;
int pt2 = m_t2;
bool swap = aTransform.MapAngles( &pt1, &pt2 );
if( swap )
{
EXCHG( pos1.x, pos2.x );
EXCHG( pos1.y, pos2.y );
}
GRSetDrawMode( aDC, aDrawMode );
FILL_T fill = aData ? NO_FILL : m_Fill;
if( aColor >= 0 )
fill = NO_FILL;
if( fill == FILLED_WITH_BG_BODYCOLOR )
GRFilledArc( &aPanel->m_ClipBox, aDC, posc.x, posc.y, pt1, pt2,
m_Radius, GetPenSize( ),
(m_Flags & IS_MOVED) ? color : ReturnLayerColor( LAYER_DEVICE_BACKGROUND ),
ReturnLayerColor( LAYER_DEVICE_BACKGROUND ) );
else if( fill == FILLED_SHAPE && !aData )
GRFilledArc( &aPanel->m_ClipBox, aDC, posc.x, posc.y, pt1, pt2, m_Radius, color, color );
else
{
#ifdef DRAW_ARC_WITH_ANGLE
GRArc( &aPanel->m_ClipBox, aDC, posc.x, posc.y, pt1, pt2, m_Radius, GetPenSize(), color );
#else
GRArc1( &aPanel->m_ClipBox, aDC, pos1.x, pos1.y, pos2.x, pos2.y,
posc.x, posc.y, GetPenSize(), color );
#endif
}
/* Set to one (1) to draw bounding box around arc to validate bounding box
* calculation. */
#if 0
EDA_Rect bBox = GetBoundingBox();
GRRect( &aPanel->m_ClipBox, aDC, bBox.GetOrigin().x, bBox.GetOrigin().y,
bBox.GetEnd().x, bBox.GetEnd().y, 0, LIGHTMAGENTA );
#endif
}
EDA_Rect LIB_ARC::GetBoundingBox()
{
int minX, minY, maxX, maxY, angleStart, angleEnd;
EDA_Rect rect;
wxPoint nullPoint, startPos, endPos, centerPos;
wxPoint normStart = m_ArcStart - m_Pos;
wxPoint normEnd = m_ArcEnd - m_Pos;
if( ( normStart == nullPoint ) || ( normEnd == nullPoint ) || ( m_Radius == 0 ) )
{
wxLogDebug( wxT("Invalid arc drawing definition, center(%d, %d) \
start(%d, %d), end(%d, %d), radius %d" ),
m_Pos.x, m_Pos.y, m_ArcStart.x, m_ArcStart.y, m_ArcEnd.x,
m_ArcEnd.y, m_Radius );
return rect;
}
endPos = DefaultTransform.TransformCoordinate( m_ArcEnd );
startPos = DefaultTransform.TransformCoordinate( m_ArcStart );
centerPos = DefaultTransform.TransformCoordinate( m_Pos );
angleStart = m_t1;
angleEnd = m_t2;
if( DefaultTransform.MapAngles( &angleStart, &angleEnd ) )
{
EXCHG( endPos.x, startPos.x );
EXCHG( endPos.y, startPos.y );
}
/* Start with the start and end point of the arc. */
minX = MIN( startPos.x, endPos.x );
minY = MIN( startPos.y, endPos.y );
maxX = MAX( startPos.x, endPos.x );
maxY = MAX( startPos.y, endPos.y );
/* Zero degrees is a special case. */
if( angleStart == 0 )
maxX = centerPos.x + m_Radius;
/* Arc end angle wrapped passed 360. */
if( angleStart > angleEnd )
angleEnd += 3600;
if( angleStart <= 900 && angleEnd >= 900 ) /* 90 deg */
maxY = centerPos.y + m_Radius;
if( angleStart <= 1800 && angleEnd >= 1800 ) /* 180 deg */
minX = centerPos.x - m_Radius;
if( angleStart <= 2700 && angleEnd >= 2700 ) /* 270 deg */
minY = centerPos.y - m_Radius;
if( angleStart <= 3600 && angleEnd >= 3600 ) /* 0 deg */
maxX = centerPos.x + m_Radius;
rect.SetOrigin( minX, minY );
rect.SetEnd( maxX, maxY );
rect.Inflate( m_Width / 2, m_Width / 2 );
return rect;
}
void LIB_ARC::DisplayInfo( WinEDA_DrawFrame* aFrame )
{
wxString msg;
EDA_Rect bBox = GetBoundingBox();
LIB_DRAW_ITEM::DisplayInfo( aFrame );
msg = ReturnStringFromValue( g_UserUnit, m_Width, EESCHEMA_INTERNAL_UNIT, true );
aFrame->AppendMsgPanel( _( "Line width" ), msg, BLUE );
msg.Printf( wxT( "(%d, %d, %d, %d)" ), bBox.GetOrigin().x,
bBox.GetOrigin().y, bBox.GetEnd().x, bBox.GetEnd().y );
aFrame->AppendMsgPanel( _( "Bounding box" ), msg, BROWN );
}
void LIB_ARC::BeginEdit( int aEditMode, const wxPoint aPosition )
{
wxCHECK_RET( ( aEditMode & ( IS_NEW | IS_MOVED | IS_RESIZED ) ) != 0,
wxT( "Invalid edit mode for LIB_ARC object." ) );
if( aEditMode == IS_NEW )
{
m_ArcStart = m_ArcEnd = aPosition;
m_editState = m_lastEditState = 1;
}
else if( aEditMode == IS_MOVED )
{
m_initialPos = m_Pos;
m_initialCursorPos = aPosition;
SetEraseLastDrawItem();
}
else
{
// The arc center point has to be rotated with while adjusting the
// start or end point, determine the side of this point and the distance
// from the start / end point
wxPoint middlePoint = wxPoint( (m_ArcStart.x + m_ArcEnd.x) / 2,
(m_ArcStart.y + m_ArcEnd.y) / 2 );
wxPoint centerVector = m_Pos - middlePoint;
wxPoint startEndVector = TwoPointVector( m_ArcStart, m_ArcEnd );
m_editCenterDistance = EuclideanNorm( centerVector );
// Determine on which side is the center point
m_editDirection = CrossProduct( startEndVector, centerVector ) ? 1 : -1;
// Drag either the start, end point or the outline
if( HitTestPoints( m_ArcStart, aPosition, MINIMUM_SELECTION_DISTANCE ) )
{
m_editSelectPoint = START;
}
else if( HitTestPoints( m_ArcEnd, aPosition, MINIMUM_SELECTION_DISTANCE ) )
{
m_editSelectPoint = END;
}
else
m_editSelectPoint = OUTLINE;
m_editState = 0;
SetEraseLastDrawItem();
}
m_Flags = aEditMode;
}
bool LIB_ARC::ContinueEdit( const wxPoint aPosition )
{
wxCHECK_MSG( ( m_Flags & ( IS_NEW | IS_MOVED | IS_RESIZED ) ) != 0, false,
wxT( "Bad call to ContinueEdit(). LIB_ARC is not being edited." ) );
if( m_Flags == IS_NEW )
{
if( m_editState == 1 ) // Second position yields the arc segment length.
{
m_ArcEnd = aPosition;
m_editState = 2;
SetEraseLastDrawItem( false );
return true; // Need third position to calculate center point.
}
}
return false;
}
void LIB_ARC::EndEdit( const wxPoint& aPosition, bool aAbort )
{
wxCHECK_RET( ( m_Flags & ( IS_NEW | IS_MOVED | IS_RESIZED ) ) != 0,
wxT( "Bad call to EndEdit(). LIB_ARC is not being edited." ) );
SetEraseLastDrawItem( false );
m_lastEditState = 0;
m_editState = 0;
m_Flags = 0;
}
void LIB_ARC::calcEdit( const wxPoint& aPosition )
{
if( m_Flags == IS_RESIZED )
{
wxPoint newCenterPoint, startPos, endPos;
// Choose the point of the arc to be adjusted
if( m_editSelectPoint == START )
{
startPos = aPosition;
endPos = m_ArcEnd;
}
else if( m_editSelectPoint == END )
{
endPos = aPosition;
startPos = m_ArcStart;
}
else
{
// Use the cursor for adjusting the arc curvature
startPos = m_ArcStart;
endPos = m_ArcEnd;
wxPoint middlePoint = wxPoint( (startPos.x + endPos.x) / 2,
(startPos.y + endPos.y) / 2 );
// If the distance is too small, use the old center point
// else the new center point is calculated over the three points start/end/cursor
if( DistanceLinePoint( startPos, endPos, aPosition ) > MINIMUM_SELECTION_DISTANCE )
{
newCenterPoint = calcCenter( startPos, aPosition, endPos );
}
else
{
newCenterPoint = m_Pos;
}
// Determine if the arc angle is larger than 180 degrees -> this happens if both
// points (cursor position, center point) lie on the same side of the vector
// start-end
int crossA = CrossProduct( TwoPointVector( startPos, endPos ),
TwoPointVector( endPos, aPosition ) );
int crossB = CrossProduct( TwoPointVector( startPos, endPos ),
TwoPointVector( endPos, newCenterPoint ) );
if( ( crossA < 0 && crossB < 0 ) || ( crossA >= 0 && crossB >= 0 ) )
newCenterPoint = m_Pos;
}
if( m_editSelectPoint == START || m_editSelectPoint == END )
{
// Compute the new center point when the start/end points are modified
wxPoint middlePoint = wxPoint( (startPos.x + endPos.x) / 2,
(startPos.y + endPos.y) / 2 );
wxPoint startEndVector = TwoPointVector( startPos, endPos );
wxPoint perpendicularVector = wxPoint( -startEndVector.y, startEndVector.x );
double lengthPerpendicularVector = EuclideanNorm( perpendicularVector );
// prevent too large values, division / 0
if( lengthPerpendicularVector < 1e-1 )
lengthPerpendicularVector = 1e-1;
perpendicularVector.x = (int) ( (double) perpendicularVector.x *
m_editCenterDistance /
lengthPerpendicularVector ) * m_editDirection;
perpendicularVector.y = (int) ( (double) perpendicularVector.y *
m_editCenterDistance /
lengthPerpendicularVector ) * m_editDirection;
newCenterPoint = middlePoint + perpendicularVector;
m_ArcStart = startPos;
m_ArcEnd = endPos;
}
m_Pos = newCenterPoint;
calcRadiusAngles();
}
else if( m_Flags == IS_NEW )
{
if( m_editState == 1 )
{
m_ArcEnd = aPosition;
}
if( m_editState != m_lastEditState )
m_lastEditState = m_editState;
// Keep the arc center point up to date. Otherwise, there will be edit graphic
// artifacts left behind from the initial draw.
int dx, dy;
int cX, cY;
int angle;
cX = aPosition.x;
cY = aPosition.y;
dx = m_ArcEnd.x - m_ArcStart.x;
dy = m_ArcEnd.y - m_ArcStart.y;
cX -= m_ArcStart.x;
cY -= m_ArcStart.y;
angle = (int) ( atan2( (double) dy, (double) dx ) * 1800 / M_PI );
RotatePoint( &dx, &dy, angle ); /* The segment dx, dy is horizontal
* -> Length = dx, dy = 0 */
RotatePoint( &cX, &cY, angle );
cX = dx / 2; /* cX, cY is on the median segment 0.0 a dx, 0 */
RotatePoint( &cX, &cY, -angle );
cX += m_ArcStart.x;
cY += m_ArcStart.y;
m_Pos.x = cX;
m_Pos.y = cY;
calcRadiusAngles();
SetEraseLastDrawItem();
}
else if( m_Flags == IS_MOVED )
{
Move( m_initialPos + aPosition - m_initialCursorPos );
}
}
void LIB_ARC::calcRadiusAngles()
{
wxPoint centerStartVector = TwoPointVector( m_Pos, m_ArcStart );
wxPoint centerEndVector = TwoPointVector( m_Pos, m_ArcEnd );
m_Radius = wxRound( EuclideanNorm( centerStartVector ) );
m_t1 = (int) ( atan2( (double) centerStartVector.y,
(double) centerStartVector.x ) * 1800 / M_PI );
m_t2 = (int) ( atan2( (double) centerEndVector.y,
(double) centerEndVector.x ) * 1800 / M_PI );
NORMALIZE_ANGLE( m_t1 );
NORMALIZE_ANGLE( m_t2 ); // angles = 0 .. 3600
// Restrict angle to less than 180 to avoid PBS display mirror Trace because it is
// assumed that the arc is less than 180 deg to find orientation after rotate or mirror.
if( (m_t2 - m_t1) > 1800 )
m_t2 -= 3600;
else if( (m_t2 - m_t1) <= -1800 )
m_t2 += 3600;
while( (m_t2 - m_t1) >= 1800 )
{
m_t2--;
m_t1++;
}
while( (m_t1 - m_t2) >= 1800 )
{
m_t2++;
m_t1--;
}
NORMALIZE_ANGLE( m_t1 );
if( !IsMoving() )
NORMALIZE_ANGLE( m_t2 );
}
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