261 lines
7.3 KiB
Go
261 lines
7.3 KiB
Go
package system
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import (
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"math/rand"
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"os"
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"github.com/hajimehoshi/ebiten/v2/audio"
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"code.rocketnine.space/tslocum/citylimits/asset"
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"code.rocketnine.space/tslocum/citylimits/component"
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"code.rocketnine.space/tslocum/citylimits/world"
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"code.rocketnine.space/tslocum/gohan"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/inpututil"
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)
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type playerMoveSystem struct {
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player gohan.Entity
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movement *MovementSystem
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lastWalkDirL bool
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rewindTicks int
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nextRewindTick int
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scrollDragX, scrollDragY int
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scrollCamStartX, scrollCamStartY float64
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}
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func NewPlayerMoveSystem(player gohan.Entity, m *MovementSystem) *playerMoveSystem {
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return &playerMoveSystem{
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player: player,
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movement: m,
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scrollDragX: -1,
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scrollDragY: -1,
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}
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}
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func (_ *playerMoveSystem) Needs() []gohan.ComponentID {
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return []gohan.ComponentID{
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component.PositionComponentID,
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component.VelocityComponentID,
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component.WeaponComponentID,
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}
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}
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func (_ *playerMoveSystem) Uses() []gohan.ComponentID {
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return nil
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}
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func (s *playerMoveSystem) Update(ctx *gohan.Context) error {
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if ebiten.IsKeyPressed(ebiten.KeyEscape) && !world.World.DisableEsc {
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os.Exit(0)
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return nil
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}
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if ebiten.IsKeyPressed(ebiten.KeyControl) && inpututil.IsKeyJustPressed(ebiten.KeyV) {
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v := 1
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if ebiten.IsKeyPressed(ebiten.KeyShift) {
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v = 2
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}
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if world.World.Debug == v {
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world.World.Debug = 0
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} else {
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world.World.Debug = v
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}
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return nil
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}
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if ebiten.IsKeyPressed(ebiten.KeyControl) && inpututil.IsKeyJustPressed(ebiten.KeyN) {
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world.World.NoClip = !world.World.NoClip
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return nil
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}
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if !world.World.GameStarted {
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if ebiten.IsKeyPressed(ebiten.KeyEnter) || ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
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world.StartGame()
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}
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return nil
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}
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if inpututil.IsKeyJustPressed(ebiten.KeyM) {
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world.World.MuteMusic = !world.World.MuteMusic
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if world.World.MuteMusic {
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asset.SoundMusic.Pause()
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} else {
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asset.SoundMusic.Play()
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}
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}
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if world.World.GameOver {
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if inpututil.IsKeyJustPressed(ebiten.KeyEnter) {
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world.World.ResetGame = true
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}
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return nil
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}
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// Update target zoom level.
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var scrollY float64
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if ebiten.IsKeyPressed(ebiten.KeyC) || ebiten.IsKeyPressed(ebiten.KeyPageDown) {
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scrollY = -0.25
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} else if ebiten.IsKeyPressed(ebiten.KeyE) || ebiten.IsKeyPressed(ebiten.KeyPageUp) {
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scrollY = .25
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} else {
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_, scrollY = ebiten.Wheel()
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if scrollY < -1 {
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scrollY = -1
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} else if scrollY > 1 {
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scrollY = 1
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}
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}
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world.World.CamScaleTarget += scrollY * (world.World.CamScaleTarget / 7)
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if world.World.CamScaleTarget < world.CameraMinZoom {
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world.World.CamScaleTarget = world.CameraMinZoom
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} else if world.World.CamScaleTarget > world.CameraMaxZoom {
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world.World.CamScaleTarget = world.CameraMaxZoom
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}
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// Smooth zoom transition.
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div := 10.0
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if world.World.CamScaleTarget > world.World.CamScale {
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world.World.CamScale += (world.World.CamScaleTarget - world.World.CamScale) / div
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} else if world.World.CamScaleTarget < world.World.CamScale {
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world.World.CamScale -= (world.World.CamScale - world.World.CamScaleTarget) / div
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}
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pressLeft := ebiten.IsKeyPressed(ebiten.KeyLeft) || ebiten.IsKeyPressed(ebiten.KeyA)
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pressRight := ebiten.IsKeyPressed(ebiten.KeyRight) || ebiten.IsKeyPressed(ebiten.KeyD)
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pressUp := ebiten.IsKeyPressed(ebiten.KeyUp) || ebiten.IsKeyPressed(ebiten.KeyW)
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pressDown := ebiten.IsKeyPressed(ebiten.KeyDown) || ebiten.IsKeyPressed(ebiten.KeyS)
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const camSpeed = 10
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if (pressLeft && !pressRight) ||
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(pressRight && !pressLeft) {
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if pressLeft {
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world.World.CamX -= camSpeed
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} else {
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world.World.CamX += camSpeed
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}
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}
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if (pressUp && !pressDown) ||
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(pressDown && !pressUp) {
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if pressUp {
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world.World.CamY -= camSpeed
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} else {
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world.World.CamY += camSpeed
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}
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}
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const scrollEdgeSize = 1
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x, y := ebiten.CursorPosition()
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if !world.World.GotCursorPosition {
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if x != 0 || y != 0 {
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world.World.GotCursorPosition = true
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} else {
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return nil
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}
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}
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if ebiten.IsMouseButtonPressed(ebiten.MouseButtonMiddle) {
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if s.scrollDragX == -1 && s.scrollDragY == -1 {
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// TODO disabled due to possible ebiten bug
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//ebiten.SetCursorMode(ebiten.CursorModeCaptured)
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s.scrollDragX, s.scrollDragY = x, y
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s.scrollCamStartX, s.scrollCamStartY = world.World.CamX, world.World.CamY
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} else {
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dx, dy := float64(x-s.scrollDragX)/world.World.CamScale, float64(y-s.scrollDragY)/world.World.CamScale
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world.World.CamX, world.World.CamY = s.scrollCamStartX-dx, s.scrollCamStartY-dy
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}
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} else {
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if s.scrollDragX != -1 && s.scrollDragY != -1 {
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s.scrollDragX, s.scrollDragY = -1, -1
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//ebiten.SetCursorMode(ebiten.CursorModeVisible)
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} else if x >= -2 && y >= -2 && x < world.World.ScreenW+2 && y < world.World.ScreenH+2 {
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// Pan via screen edge.
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if x <= scrollEdgeSize {
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world.World.CamX -= camSpeed
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} else if x >= world.World.ScreenW-scrollEdgeSize-1 {
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world.World.CamX += camSpeed
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}
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if y <= scrollEdgeSize {
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world.World.CamY -= camSpeed
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} else if y >= world.World.ScreenH-scrollEdgeSize-1 {
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world.World.CamY += camSpeed
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}
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}
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}
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if x < world.SidebarWidth {
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world.World.Level.ClearHoverSprites()
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world.World.HoverX, world.World.HoverY = 0, 0
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if inpututil.IsMouseButtonJustPressed(ebiten.MouseButtonLeft) {
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button := world.HUDButtonAt(x, y)
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if button != nil {
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if button.StructureType != 0 {
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if world.World.HoverStructure == button.StructureType {
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world.SetHoverStructure(0) // Deselect.
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} else {
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world.SetHoverStructure(button.StructureType)
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}
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asset.SoundSelect.Rewind()
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asset.SoundSelect.Play()
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}
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}
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}
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} else if world.World.HoverStructure != 0 {
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tileX, tileY := world.ScreenToCartesian(x, y)
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if tileX >= 0 && tileY >= 0 && tileX < 256 && tileY < 256 {
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multiUseStructure := world.World.HoverStructure == world.StructureBulldozer || world.World.HoverStructure == world.StructureRoad
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if inpututil.IsMouseButtonJustPressed(ebiten.MouseButtonLeft) || (multiUseStructure && ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft)) {
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if world.World.HoverStructure == world.StructureBulldozer {
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for i := range world.World.Level.Tiles {
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world.World.Level.Tiles[i][int(tileX)][int(tileY)].Sprite = nil
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var img *ebiten.Image
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if i == 0 {
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img = world.World.TileImages[world.DirtTile+world.World.TileImagesFirstGID]
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}
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world.World.Level.Tiles[i][int(tileX)][int(tileY)].EnvironmentSprite = img
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}
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} else {
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_, err := world.BuildStructure(world.World.HoverStructure, false, int(tileX), int(tileY))
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if err == nil {
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sounds := []*audio.Player{
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asset.SoundPop1,
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asset.SoundPop2,
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asset.SoundPop3,
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asset.SoundPop4,
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asset.SoundPop5,
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}
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sound := sounds[rand.Intn(len(sounds))]
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sound.Rewind()
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sound.Play()
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}
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}
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world.BuildStructure(world.World.HoverStructure, true, int(tileX), int(tileY))
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} else if int(tileX) != world.World.HoverX || int(tileY) != world.World.HoverY {
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world.BuildStructure(world.World.HoverStructure, true, int(tileX), int(tileY))
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}
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world.World.HoverX, world.World.HoverY = int(tileX), int(tileY)
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}
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}
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return nil
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}
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func (s *playerMoveSystem) Draw(_ *gohan.Context, _ *ebiten.Image) error {
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return gohan.ErrSystemWithoutDraw
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}
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func deltaXY(x1, y1, x2, y2 float64) (dx float64, dy float64) {
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dx, dy = x1-x2, y1-y2
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if dx < 0 {
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dx *= -1
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}
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if dy < 0 {
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dy *= -1
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}
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return dx, dy
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}
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