cocos2d::Vec2 SteeringBehaviors::wallAvoidance()
{
auto tmpMovingEntity = m_pOwner->getMovingEntity();
Vec2 tmpForce;
auto tmpAllWalls = GamepMapSingleton->getWalls();
for (auto tmpIterator = tmpAllWalls.begin(); tmpIterator != tmpAllWalls.end(); tmpIterator++)
{
// 分别计算距离每个边的距离
auto tmpWallToOwner = tmpMovingEntity.getPosition() - tmpIterator->getPointA();
auto tmpDot = tmpWallToOwner.dot(tmpIterator->getNormal());
if (tmpDot >= tmpMovingEntity.getRadius())
{
continue;
}
// @_@ 如果意外出去了，这里就还是相当于距离相当近
if (tmpDot <= 0)
{
tmpDot = 1;
}
tmpForce += m_wallAvoidanceMagnify * tmpIterator->getNormal() / tmpDot;
}
return tmpForce;
}
void ShapeSegment::draw(const Graphic::Color& pColor) const
{
Graphic::System::get().drawLine( getPointA(), getPointB(), pColor );
}
