func (a *Action) DoFov(obj entity.Entity) {
// TODO: Parametrisable radius
const radius = 12
if f, ok := obj.(entity.Fov); ok {
fv := fov.New(
func(loc space.Location) bool { return a.world.Terrain(loc).BlocksSight() },
func(pt image.Point, loc space.Location) { f.MarkFov(pt, loc) },
a.world.Manifold)
fv.Run(a.query.Loc(obj), radius)
}
}
func (q *Query) VisibleEntities(loc space.Location, radius int) []space.OffsetEntity {
seen := map[space.OffsetEntity]bool{}
fv := fov.New(
func(loc space.Location) bool { return q.world.Terrain(loc).BlocksSight() },
func(pt image.Point, loc space.Location) {
for _, oe := range q.world.Spatial.At(loc) {
seen[space.OffsetEntity{oe.Entity, pt.Add(oe.Offset)}] = true
}
},
q.world.Manifold)
fv.Run(loc, radius)
result := []space.OffsetEntity{}
for oe, _ := range seen {
result = append(result, oe)
}
return result
}