private static void MovePointHandleByRotationSteps(GenericPosture posture, CalibrationHelper calibrationHelper, int handle, PointF point, GenericPostureConstraintRotationSteps constraint)
{
if (constraint == null)
{
return;
}
PointF parent = posture.PointList[constraint.Origin];
PointF leg1 = posture.PointList[constraint.Leg1];
if (parent == leg1 || constraint.Step == 0)
{
return;
}
PointF candidate = point;
if (constraint.KeepDistance)
{
PointF leg2 = posture.PointList[posture.Handles[handle].Reference];
float distance = GeometryHelper.GetDistance(parent, leg2);
candidate = GeometryHelper.GetPointAtDistance(parent, point, distance);
}
int constraintAngleSubdivisions = 360 / constraint.Step;
posture.PointList[posture.Handles[handle].Reference] = GeometryHelper.GetPointAtClosestRotationStep(parent, leg1, candidate, constraintAngleSubdivisions);
}
private static void MovePointHandleAtDistance(GenericPosture posture, int handle, PointF point, GenericPostureConstraintDistanceToPoint constraint, Keys modifiers)
{
if (constraint == null)
{
MovePointHandleFreely(posture, handle, point);
return;
}
PointF parent = posture.PointList[constraint.RefPoint];
PointF child = posture.PointList[posture.Handles[handle].Reference];
float distance = GeometryHelper.GetDistance(parent, child);
PointF temp = GeometryHelper.GetPointAtDistance(parent, point, distance);
int constraintAngleSubdivisions = 8; // (Constraint by 45° steps).
if ((modifiers & Keys.Shift) == Keys.Shift)
{
posture.PointList[posture.Handles[handle].Reference] = GeometryHelper.GetPointAtClosestRotationStepCardinal(parent, temp, constraintAngleSubdivisions);
}
else
{
posture.PointList[posture.Handles[handle].Reference] = temp;
}
}