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package engine
import (
"image/color"
"time"
"age_of_empires/ecs"
"age_of_empires/physics"
"age_of_empires/selection"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/text/v2"
"golang.org/x/exp/slog"
)
type Action string
const (
Selecting Action = "selecting"
Patrolling Action = "patrolling"
)
var soilColor = color.RGBA{0x60, 0x40, 0x20, 0xff}
type Game struct {
CurrentAction Action
Camera Camera
GlobalSelection selection.GlobalSelection
ResourceAmount int
FaceSource *text.GoTextFaceSource
UnitBuilder EntityBuilder
NowFunc func() time.Time
// Components
Mask []ecs.Mask
// Entities []*Entity
Position []physics.Point
RelBounds []physics.Rectangle
Image []*ebiten.Image
Selectable []selection.Selectable
Move []physics.Move
Order []OrderKind
PatrolOrder []PatrolOrder
ResourceGatherer []ResourceGatherer
ResourceSource []ResourceSource
ResourceStorage []ResourceStorage
Spawn []Spawn
}
func (g Game) Now() time.Time {
if g.NowFunc != nil {
return g.NowFunc()
}
return time.Now()
}
func (g *Game) Append(components Components, mask ecs.Mask) ecs.Entity {
g.Mask = append(g.Mask, mask)
g.Position = append(g.Position, components.Position)
g.RelBounds = append(g.RelBounds, components.RelBounds)
g.Image = append(g.Image, components.Image)
g.Selectable = append(g.Selectable, components.Selectable)
g.Move = append(g.Move, components.Move)
g.Order = append(g.Order, components.Order)
g.ResourceGatherer = append(g.ResourceGatherer, components.ResourceGatherer)
g.ResourceSource = append(g.ResourceSource, components.ResourceSource)
g.ResourceStorage = append(g.ResourceStorage, components.ResourceStorage)
g.Spawn = append(g.Spawn, components.Spawn)
return ecs.Entity(len(g.Mask) - 1)
}
func (g *Game) GetMoveMap() physics.MoveMap {
required := ecs.CM_Position
blocked := map[physics.Point]bool{}
for i, mask := range g.Mask {
if mask&required == required {
blocked[g.Position[i]] = true
}
}
return physics.MoveMap{Width: WorldWidth, Height: WorldHeight, Blocked: blocked}
}
func (g *Game) entityAt(position physics.Point) ecs.Entity {
required := ecs.CM_Position
for i, mask := range g.Mask {
if mask&required == required && g.Position[i] == position {
return ecs.Entity(i)
}
}
return -1
}
func getAllStorageDockings(g *Game) []physics.Point {
storageDockings := []physics.Point{}
required := ecs.CM_Position | ecs.CM_ResourceStorage
for i, mask := range g.Mask {
if mask&required == required {
position := g.Position[i]
storageDockings = append(storageDockings, physics.AdjacentPoints(position)...)
}
}
return storageDockings
}
const (
KeySpawnRequest = ebiten.KeyS
KeyPatrolRequest = ebiten.KeyQ
)
func (g *Game) updateSelecting(input Input, moveMap physics.MoveMap) {
if input.LeftMouseDown {
g.GlobalSelection.Start(input.Cursor)
g.GlobalSelection.StartScreen(input.ScreenCursor)
}
if input.RightMouseUp {
destination := input.Cursor.Div(100).Mul(100)
slog.Info("destination", slog.String("destination", destination.String()))
for _, i := range g.GlobalSelection.Selected {
MainAction(g, i, destination, moveMap)
}
}
if input.LeftMouseUp {
if g.GlobalSelection.IsActive(input.Cursor) {
if g.GlobalSelection.IsArea(input.Cursor) {
g.GlobalSelection.SelectMultiple(input.Cursor, g.Mask, g.Selectable, g.Position, g.RelBounds)
} else {
g.GlobalSelection.SelectSingle(input.Cursor, g.Mask, g.Selectable, g.Position, g.RelBounds)
}
}
}
if input.SpawnPressed {
required := ecs.CM_Spawn
for _, i := range g.GlobalSelection.Selected {
if g.Mask[i]&required == required {
spawn := &g.Spawn[i]
if g.ResourceAmount >= spawn.UnitResourceCost {
g.ResourceAmount -= spawn.UnitResourceCost
spawn.Requests = append(spawn.Requests, SpawnRequest{Start: g.Now()})
}
}
}
}
}
func (g *Game) UpdateSimulation(input Input) {
moveMap := g.GetMoveMap()
if input.EscapePressed {
g.GlobalSelection.Unselect(g.Selectable)
g.CurrentAction = Selecting
} else if input.PatrolPressed {
g.CurrentAction = Patrolling
}
switch g.CurrentAction {
case Selecting:
g.updateSelecting(input, moveMap)
case Patrolling:
if input.RightMouseUp {
destination := input.Cursor.Div(100).Mul(100)
StartPatrolSystem(destination, g.Mask, g.Position, g.Move, g.Order, g.PatrolOrder)
g.CurrentAction = Selecting
}
}
physics.UpdateMoveSystem(moveMap, g.Mask, g.Move, g.Position)
UpdateSpawnSystem(g, g.Now(), g.Mask, g.Spawn, g.Position)
UpdateGatherSystem(g, g.Now(), g.GetMoveMap(), g.Mask, g.Order, g.Position, g.Move, g.ResourceGatherer)
UpdatePatrolSystem(g.GetMoveMap(), g.Mask, g.Order, g.PatrolOrder, g.Position, g.Move)
}
func (g *Game) Update() error {
g.Camera.Update(1.0 / 60.0)
g.UpdateSimulation(CollectInput(&g.Camera))
return nil
}
func (g *Game) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeight int) {
return ScreenWidth, ScreenHeight
}
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