public override void StartWithTarget(CCNode target)
{
base.StartWithTarget(target);
float r, zenith, azimuth;
SphericalRadius(out r, out zenith, out azimuth);
if (float.IsNaN(m_fRadius))
{
m_fRadius = r;
}
if (float.IsNaN(m_fAngleZ))
{
m_fAngleZ = CCMacros.CCRadiansToDegrees(zenith);
}
if (float.IsNaN(m_fAngleX))
{
m_fAngleX = CCMacros.CCRadiansToDegrees(azimuth);
}
m_fRadZ = CCMacros.CCDegreesToRadians(m_fAngleZ);
m_fRadX = CCMacros.CCDegreesToRadians(m_fAngleX);
}
protected void UpdateSliderPosition(CCPoint location)
{
// Clamp the position of the icon within the circle
CCRect backgroundBox = _background.BoundingBox;
// Get the center point of the background image
float centerX = _startPos.X + backgroundBox.Size.Width * 0.5f;
float centerY = _startPos.Y + backgroundBox.Size.Height * 0.5f;
// Work out the distance difference between the location and center
float dx = location.X - centerX;
float dy = location.Y - centerY;
// Update angle by using the direction of the location
var angle = (float)Math.Atan2(dy, dx);
float angleDeg = CCMacros.CCRadiansToDegrees(angle) + 180.0f;
// use the position / slider width to determin the percentage the dragger is at
Hue = angleDeg;
// send Control callback
SendActionsForControlEvents(CCControlEvent.ValueChanged);
}