public override void startWithTarget(Node target)
{
base.startWithTarget(target);
_eFromType = kTypeProjectile;
NodeWithHeight rendererTarget = target as NodeWithHeight;
_oStartPos = rendererTarget.position;
_oEndPos = _unit.Node.position;
_fFromHeight = rendererTarget.height;
_oDeltaPos = _oEndPos - _oStartPos;
_fMinSpeed = Mathf.Sqrt(_oDeltaPos.x * _oDeltaPos.x + _oDeltaPos.y * _oDeltaPos.y) / _duration;
}
public override void update(float time)
{
if (!_target)
{
return;
}
Unit _u = _unit;
if (_u != null)
{
_oEndPos = _u.Node.position;
_fToHeight = _u.Node.height + _u.Node.HalfOfHeight;
}
_oDeltaPos = _oEndPos - _oStartPos;
_fDeltaHeight = _fToHeight - _fFromHeight;
float distance = Mathf.Sqrt(_oDeltaPos.x * _oDeltaPos.x + _oDeltaPos.y * _oDeltaPos.y);
_duration = distance / _fMinSpeed;
// 抛物线
float fA = distance;
float fX = time * fA - fA / 2;
fA = -4 * _fMaxHeightDelta / (fA * fA);
float fHeightDelta = fA * fX * fX + _fMaxHeightDelta;
NodeWithHeight target = _target as NodeWithHeight;
target.position = _oStartPos + _oDeltaPos * time;
target.height = _fFromHeight + _fDeltaHeight * time + fHeightDelta;
if (_bFixRotation)
{
// 修正角度
//float fOffsetR = Mathf.Atan(fA * fX);
target.rotation = (
Mathf.Atan2(_oEndPos.y - _oStartPos.y, _oEndPos.x - _oStartPos.x) +
(_oStartPos.x < _oEndPos.x ? Mathf.Atan(fA * fX) : -Mathf.Atan(fA * fX))
) * Mathf.Rad2Deg;
}
}
