func NewProjectile(id int64, start, finish *geometry.Point, damage int, prange float64, owner gameObjectsBase.Activer) *Projectile {
shift := math.Sqrt(2)/2 + 1e-2
alpha := math.Atan2(finish.Y-start.Y, finish.X-start.X)
start.Move(shift*math.Cos(alpha), shift*math.Sin(alpha))
return &Projectile{
fightBase.NewBaseBlow(fightBase.BM_HIT, prange, "hit"),
gameObjectsBase.NewGameObject(id, *start),
*finish,
damage,
owner,
}
}
func (obj *ActiveObject) GetCollisionableSide(dir int, shift float64) (geometry.Segment, geometry.Point) {
var p1, p2, p3 geometry.Point
p1 = obj.GetShiftedCenter(dir, shift)
p2 = p1
p3 = p1
switch dir {
case consts.NORTH_DIR:
p1.Move(-consts.OBJECT_HALF, -consts.OBJECT_HALF)
p2.Move(consts.OBJECT_HALF, -consts.OBJECT_HALF)
case consts.SOUTH_DIR:
p1.Move(-consts.OBJECT_HALF, consts.OBJECT_HALF)
p2.Move(consts.OBJECT_HALF, consts.OBJECT_HALF)
case consts.EAST_DIR:
p1.Move(consts.OBJECT_HALF, -consts.OBJECT_HALF)
p2.Move(consts.OBJECT_HALF, consts.OBJECT_HALF)
case consts.WEST_DIR:
p1.Move(-consts.OBJECT_HALF, -consts.OBJECT_HALF)
p2.Move(-consts.OBJECT_HALF, consts.OBJECT_HALF)
}
return geometry.Segment{p1, p2}, p3
}