func (c *Creature) FOV(a *area.Area) (cs map[coord.Coord]struct{}) {
radius := c.Sight
cs = make(map[coord.Coord]struct{})
for x := c.X() - radius; x <= c.X()+radius; x++ {
for y := c.Y() - radius; y <= c.Y()+radius; y++ {
// Distance between creature x and y coordinates and sight radius.
dx := float64(x - c.X())
dy := float64(y - c.Y())
// Distance between creature and sight radius.
dist := math.Sqrt(math.Pow(dx, 2) + math.Pow(dy, 2))
// Discriminate coordinates which are outside of the circle.
if dist > float64(radius) {
continue
}
// Ignore hero.
for _, p := range get_line(c.X(), c.Y(), x, y)[1:] {
if !a.ExistsXY(p.X, p.Y) {
break
}
cs[p] = struct{}{}
// Terrain that breaks line of sight.
if !a.IsXYPathable(p.X, p.Y) {
break
}
}
}
}
return cs
}
// Objects is a debug function to generate objects.
func Objects(a *area.Area, num int) {
o := make(map[coord.Coord]area.DrawPather, a.Width*a.Height)
log.Println(len(object.Objects))
var objectList = make([]object.Object, len(object.Objects))
var index int
for _, o := range object.Objects {
objectList[index] = o
index++
}
for x := 0; x < a.Width; x++ {
for y := 0; y < a.Height; y++ {
if num <= 0 {
return
}
if util.RandInt(0, 50) != 42 {
continue
}
if !a.IsXYPathable(x, y) {
continue
}
c := coord.Coord{X: x, Y: y}
o[c] = objectList[util.RandInt(0, len(objectList))].New()
}
}
a.Objects = o
}
// Mobs is a debug function to add mobs to the map.
func Mobs(a *area.Area, num int) {
var mobList = []creature.Creature{
// creature.Beastiary["echidna"],
creature.Beastiary["gobbal"],
creature.Beastiary["tofu"],
creature.Beastiary["iop"],
creature.Beastiary["arachnee"],
}
for x := 0; x < a.Width; x++ {
for y := 0; y < a.Height; y++ {
if num <= 0 {
return
}
if util.RandInt(0, 50) != 42 {
continue
}
if !a.IsXYPathable(x, y) {
continue
}
g := mobList[util.RandInt(0, len(mobList))]
g.Inventory = make(creature.Inventory)
c := coord.Coord{X: x, Y: y}
g.SetX(x)
g.SetY(y)
a.Monsters[c] = &g
num--
}
}
}
func HeroMovement(ev termbox.Event, a *area.Area) int {
var col *area.Collision
var err error
switch ev.Key {
case ui.MoveUpKey:
col, err = a.MoveUp(&creature.Hero)
case ui.MoveDownKey:
col, err = a.MoveDown(&creature.Hero)
case ui.MoveLeftKey:
col, err = a.MoveLeft(&creature.Hero)
case ui.MoveRightKey:
col, err = a.MoveRight(&creature.Hero)
default:
return 0
}
// Creature moved out of bounds.
if err != nil {
return 0
}
stk, ok := a.Items[creature.Hero.Coord()]
if ok && stk.Len() > 0 {
if stk.Len() > 1 {
status.Println("You find a heap of items on the ground:", termbox.ColorWhite)
} else {
status.Println("You find a single item on the ground:", termbox.ColorWhite)
}
print := " "
for _, s := range []area.DrawPather(*stk) {
i, _ := s.(item.DrawItemer)
if stk.Len() < 4 {
print += i.Name() + ", "
} else {
print += string(i.Graphic().Ch) + ", "
}
}
status.Println(print[:len(print)-2], termbox.ColorBlack+termbox.AttrBold)
}
// Successful movement.
if col == nil {
return creature.Hero.Speed
}
// Another creature occupied that tile -> battle!
if c, ok := col.S.(*creature.Creature); ok {
creature.Hero.Battle(c, a)
return creature.Hero.Speed
}
// Hero walked into an object.
if obj, ok := a.Objects[col.Coord()].(*object.Object); ok {
// If the hero walked into a door -> open!
switch obj.Name() {
case "door (closed)":
a.Objects[col.Coord()] = object.Objects["door (open)"].New()
status.Println("You open the closed door.", termbox.ColorBlack+termbox.AttrBold)
return creature.Hero.Speed
}
}
return 0
}
// Action performs simple AI for a creature.
func (c *Creature) Action(a *area.Area) int {
if i := a.Items[c.Coord()].Peek(); i != nil {
c.PickUp(a)
return c.Speed
}
if c.Equipment.MainHand == nil && len(c.Inventory) > 0 {
for _, pos := range item.Positions {
if i, ok := c.Inventory[pos]; ok {
if !item.IsEquipable(i) {
break
}
if i.Name() != "Iron Sword" {
break
}
c.Equip(pos)
return c.Speed
}
}
}
var col *area.Collision
var err error
if c.X() < Hero.X() {
col, err = a.MoveRight(c)
} else if c.X() > Hero.X() {
col, err = a.MoveLeft(c)
} else if c.Y() < Hero.Y() {
col, err = a.MoveDown(c)
} else if c.Y() > Hero.Y() {
col, err = a.MoveUp(c)
}
if err != nil {
// log.Println("err / collide?")
return c.Speed
// return 0
}
if col == nil {
return c.Speed
}
if mob, ok := col.S.(*Creature); ok {
if mob.IsHero() {
c.Battle(mob, a)
return c.Speed
}
}
// If all fails, creature waits.
return c.Speed
}
// Items is a debug function to add mobs to the map.
func Items(a *area.Area, num int) {
var itemList = make([]item.DrawItemer, len(item.Items))
var index int
for _, i := range item.Items {
itemList[index] = i
index++
}
for x := 0; x < a.Width; x++ {
for y := 0; y < a.Height; y++ {
if num <= 0 {
return
}
if util.RandInt(0, 50) != 42 {
continue
}
if !a.IsXYPathable(x, y) {
continue
}
c := coord.Coord{x, y}
i := item.New(itemList[util.RandInt(0, len(itemList))])
if i == nil {
continue
}
i.SetX(x)
i.SetY(y)
if a.Items[c] == nil {
a.Items[c] = new(area.Stack)
}
a.Items[c].Push(i)
num--
}
}
}
// DrawFOV draws a field of view around a creature as well as the creatures
// memory of already explored areas.
func (c Creature) DrawFOV(a *area.Area) {
// Clear screen.
ui.Clear()
// Get viewport coordinate offset.
camX, camY := camXY(c, a)
// Draw already explored areas.
a.DrawExplored(ui.Area, camX, camY)
// Draw hero.
a.Draw(c.X(), c.Y(), camX, camY, ui.Area)
// Visible coordinates of character.
cs := c.FOV(a)
for p := range cs {
// Set terrain as explored.
a.Terrain[p.X][p.Y].IsExplored = true
// TODO(_): refactor cam.
a.Draw(p.X, p.Y, camX, camY, ui.Area)
}
}