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More consistent behavior between ON_Arc::SetAngleRadians() and ON_Arc… #55

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More consistent behavior between ON_Arc::SetAngleRadians() and ON_Arc… #55

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10 changes: 6 additions & 4 deletions opennurbs_arc.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -330,22 +330,24 @@ ON_Interval ON_Arc::DomainDegrees() const

bool ON_Arc::SetAngleRadians( double a )
{
ON_Interval angles;
if ( a < 0.0 )
{
double a0 = m_angle.m_t[0];
m_angle.Set(a0+a,a0);
angles.Set(a0+a,a0);
Reverse();
}
else
{
m_angle.m_t[1] = m_angle.m_t[0] + a;
double a0 = m_angle.m_t[0];
angles.Set(a0, a0+a);
}
return ( fabs(m_angle.Length()) <= 2.0*ON_PI ) ? true : false;
return SetAngleIntervalRadians(angles);
}

bool ON_Arc::SetAngleIntervalRadians( ON_Interval angle_in_radians )
{
bool rc = angle_in_radians.IsIncreasing()
bool rc = (angle_in_radians.IsIncreasing() || angle_in_radians.Length() < ON_EPSILON)
&& angle_in_radians.Length() < (1.0+ON_SQRT_EPSILON)*2.0*ON_PI;
if (rc)
{
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13 changes: 8 additions & 5 deletions opennurbs_arc.h
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Original file line number Diff line number Diff line change
Expand Up @@ -382,11 +382,14 @@ class ON_CLASS ON_Arc : public ON_Circle
// The arc's domain in degrees.
ON_Interval DomainDegrees() const;

// Description:
// Set arc's subtended angle in radians.
// Parameters:
// angle_in_radians - [in] 0 <= angle_in_radians <= 2.0*ON_PI
//
/*
Description:
Set arc's subtended angle in radians.
Parameters:
angle_in_radians - [in] 0 <= angle_in_radians <= 2.0*ON_PI
Returns:
true if successful.
*/
bool SetAngleRadians(
double angle_in_radians
);
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