func (e *Entity) SwapPositionWith(other interfaces.Entity) {
if !e.IsTangible() || !other.IsTangible() {
log.Fatalf("Swap only makes sense for tangible entities. Got %v & %v",
e.GetName(), other.GetName())
}
/* It's crucial that two tagnible entities don't end up on same tile */
boardId, x, y := e.GetPosition()
boardId2, x2, y2 := other.GetPosition()
e.BoardId, e.X, e.Y = boardId2, x2, y2
/* Can work since both entities are technically in the same place */
other.SetPosition(boardId, x, y)
/* Manually trigger trodden functions since we didn't SetPosition */
for _, entity := range e.Game.GetEntitiesAtSpace(e.GetPosition()) {
entity.Trodden(e)
}
/* other's reposition function will be called by SetPosition */
e.RepositionFunction(boardId, x, y, boardId2, x2, y2)
}
func (g *Game) placeEntityRandomly(entity interfaces.Entity, boardId int) {
x, y := g.GetRandomEmptySpace()
entity.SetPosition(boardId, x, y)
g.AddEntity(entity)
}
func (g *Game) PlaceAtNearestTile(ent interfaces.Entity, boardId, x, y int) {
tryX, tryY := -1, -1
/* assuming BOARD_WIDTH is the higher of the two */
for radius := 0; radius < interfaces.BOARD_WIDTH+5; radius++ {
/* Testing horizontally an vertically closest tiles */
/* Right */
tryX, tryY = x+radius, y
if g.CanMoveToSpace(boardId, tryX, tryY) {
ent.SetPosition(boardId, tryX, tryY)
return
}
/* Bottom */
tryX, tryY = x, y+radius
if g.CanMoveToSpace(boardId, tryX, tryY) {
ent.SetPosition(boardId, tryX, tryY)
return
}
/* Left */
tryX, tryY = x-radius, y
if g.CanMoveToSpace(boardId, tryX, tryY) {
ent.SetPosition(boardId, tryX, tryY)
return
}
/* Top */
tryX, tryY = x, y-radius
if g.CanMoveToSpace(boardId, tryX, tryY) {
ent.SetPosition(boardId, tryX, tryY)
return
}
/* Testing all tiles at increasing distances away */
for wallLen := 0; wallLen < (radius*2)+1; wallLen++ {
/* Testing top wall of new circle */
tryX, tryY = x-radius+wallLen, y-radius
if g.CanMoveToSpace(boardId, tryX, tryY) {
ent.SetPosition(boardId, tryX, tryY)
return
}
/* Testing right wall of new circle */
tryX, tryY = x+radius, y-radius+wallLen
if g.CanMoveToSpace(boardId, tryX, tryY) {
ent.SetPosition(boardId, tryX, tryY)
return
}
/* Testing left wall of new circle */
tryX, tryY = x-radius, y-radius+wallLen
if g.CanMoveToSpace(boardId, tryX, tryY) {
ent.SetPosition(boardId, tryX, tryY)
return
}
/* Testing bottom wall of new circle */
tryX, tryY = x-radius+wallLen, y+radius
if g.CanMoveToSpace(boardId, tryX, tryY) {
ent.SetPosition(boardId, tryX, tryY)
return
}
}
}
}
func setEntity(game interfaces.Game, entity interfaces.Entity,
boardId, x, y int) {
entity.SetPosition(boardId, x, y)
game.AddEntity(entity)
}
func (me *entranceGen) setEntity(game interfaces.Game,
entity interfaces.Entity, x, y int) {
entity.SetPosition(me.GetId(), x, y)
game.AddEntity(entity)
}