double DistanceAtAngle(PointVector& points, TemplatePtr& T, double theta)
{
PointVector newpoints(points);
RotateBy(newpoints, theta);
return PathDistance(newpoints, T->Points);
}
const BAffineTransform&
BAffineTransform::RotateBy(const BPoint& center, double angle)
{
TranslateBy(-center.x, -center.y);
RotateBy(angle);
return TranslateBy(center.x, center.y);
}
void RotateToZero(PointVector& points)
{
PointPtr c = Centroid(points);
double theta = atan2(c->Y - points[0]->Y, c->X - points[0]->X);
RotateBy(points, -theta);
}
void TransformNode::Pitch(float angle)
{
RotateBy(angle, m_right);
}
void Draw(BRect invalidate)
{
RotateBy(-M_PI / 5);
TranslateBy(0, Bounds().Height() / 3);
BStringView::Draw(invalidate);
}
void TransformNode::Yaw(float angle)
{
RotateBy(angle, Vector3(0.0f, 1.0f, 0.0f));
}
void TransformNode::Roll(float angle)
{
RotateBy(angle, m_forward);
}
void CSkyBox::Update(float fElapseTime)
{
RotateBy(0, m_fRotateSpeed * fElapseTime, 0);
}
//----------------------------------------------------------------
/// Rotate By
///
/// Rotate around the arbitary axis
///
/// @param X-axis Component
/// @param Y-axis Component
/// @param Z-axis Component
/// @param Angle in radians
//----------------------------------------------------------------
void Transform::RotateBy(f32 inXAxis, f32 inYAxis, f32 inZAxis, f32 infAngleRads)
{
RotateBy(Vector3(inXAxis,inYAxis,inZAxis), infAngleRads);
}
//----------------------------------------------------------------
/// Rotate Z By
///
/// Rotate around the z-axis
///
/// @param Angle to rotate in radians
//----------------------------------------------------------------
void Transform::RotateZBy(f32 infAngleRads)
{
RotateBy(Vector3::k_unitPositiveZ, infAngleRads);
}
