ludic/examples/chronorift/overworld.ludic

# overworld.ludic — boot, movement/encounter input, and the shop system.

handler Boot phase Start {
  png_load("assets/kenney/tiny-town/Tiles/tile_0000.png")      # 0 grass
  png_load("assets/kenney/tiny-town/Tiles/tile_0004.png")      # 1 tree
  png_load("assets/kenney/tiny-town/Tiles/tile_0025.png")      # 2 path
  png_load("assets/kenney/tiny-town/Tiles/tile_0073.png")      # 3 house
  png_load("assets/kenney/tiny-town/Tiles/tile_0112.png")      # 4 arch
  png_load("assets/kenney/tiny-dungeon/Tiles/tile_0096.png")   # 5 hero
  png_load("assets/kenney/tiny-dungeon/Tiles/tile_0108.png")   # 6 slime
  png_load("assets/kenney/tiny-dungeon/Tiles/tile_0120.png")   # 7 skeleton
  png_load("assets/kenney/tiny-dungeon/Tiles/tile_0110.png")   # 8 boss
  png_load("assets/kenney/tiny-dungeon/Tiles/tile_0084.png")   # 9 mage
  png_load("assets/kenney/tiny-dungeon/Tiles/tile_0048.png")   # 10 floor
  png_load("assets/kenney/tiny-dungeon/Tiles/tile_0026.png")   # 11 wall

  build_field(0)
  spawn Player {
    Pos    { x: 11, y: 15 }
    Actor  { kind: 5 }
    Party  { slot: 0 }
    Stats  { hp: 40, maxhp: 40, mp: 8,  maxmp: 8,  atk: 12, def: 6, lvl: 1, xp: 0, guard: 0 }
  }
  spawn Ally {
    Party  { slot: 1 }
    Stats  { hp: 26, maxhp: 26, mp: 16, maxmp: 16, atk: 8,  def: 4, lvl: 1, xp: 0, guard: 0 }
  }
  set_reg(R_MODE, 0)
  set_reg(R_ENC, 4)
  set_reg(R_MAP, 0)
  set_reg(R_BOSS, 0)
  set_reg(R_GOLD, 20)
  set_reg(R_POTION, 2)
}

handler Control phase Input {
  if reg(R_MODE) == 0 {
    for (p) in query [Pos, {Player}] {
      let k = key()
      let nx = p.x
      let ny = p.y
      if k == 'w' { ny = p.y - 1 }
      if k == 's' { ny = p.y + 1 }
      if k == 'a' { nx = p.x - 1 }
      if k == 'd' { nx = p.x + 1 }
      let moved = 0
      if walkable(nx, ny) {
        if nx != p.x or ny != p.y {
          p.x = nx
          p.y = ny
          moved = 1
        }
      }
      if moved == 1 {
        let tc = tile(p.x, p.y)
        if tc == 'D' {
          build_dungeon(0)
          p.x = 3
          p.y = 2
          set_reg(R_MAP, 1)
        }
        if tc == 'S' {
          build_field(0)
          p.x = 36
          p.y = 3
          set_reg(R_MAP, 0)
        }
        if tc == 'B' {
          if reg(R_BOSS) == 0 {
            set_reg(R_ETYPE, 2)
            spawn Enemy {
              Actor { kind: 8 }
              Stats { hp: 120, maxhp: 120, mp: 0, maxmp: 0, atk: 18, def: 10, lvl: 5, xp: 300, guard: 0 }
            }
            set_reg(R_MODE, 1)
            set_reg(R_PHASE, 0)
            set_reg(R_CUR, 0)
          }
        }
        if tc == 'h' {
          set_reg(R_MODE, 4)
          set_reg(R_CUR, 0)
        }
        if tc != 'D' {
          if tc != 'S' {
            if tc != 'B' {
             if tc != 'h' {
              set_reg(R_ENC, reg(R_ENC) - 1)
              if reg(R_ENC) <= 0 {
                set_reg(R_ENC, rng_range(4, 9))
                let et = 0
                if reg(R_MAP) == 1 { et = 1 }
                if reg(R_MAP) == 0 {
                  if rng_chance(40) { et = 1 }
                }
                set_reg(R_ETYPE, et)
                if et == 0 {
                  spawn Enemy {
                    Actor { kind: 6 }
                    Stats { hp: 18, maxhp: 18, mp: 0, maxmp: 0, atk: 8, def: 2, lvl: 1, xp: 7, guard: 0 }
                  }
                }
                if et == 1 {
                  spawn Enemy {
                    Actor { kind: 7 }
                    Stats { hp: 30, maxhp: 30, mp: 0, maxmp: 0, atk: 11, def: 5, lvl: 1, xp: 15, guard: 0 }
                  }
                }
                set_reg(R_MODE, 1)
                set_reg(R_PHASE, 0)
                set_reg(R_CUR, 0)
              }
             }
            }
          }
        }
      }
      if k == 'k' { save() }
      if k == 'l' { if load() { } }
    }
  }
}

# shop (at the house 'h' tile): buy potions with gold
handler Shop phase Update {
  if reg(R_MODE) == 4 {
    let k = key()
    if k == 'w' { set_reg(R_CUR, max(0, reg(R_CUR) - 1)) }
    if k == 's' { set_reg(R_CUR, min(1, reg(R_CUR) + 1)) }
    if is_confirm(k) {
      if reg(R_CUR) == 0 {
        if reg(R_GOLD) >= 10 {
          set_reg(R_GOLD, reg(R_GOLD) - 10)
          set_reg(R_POTION, reg(R_POTION) + 1)
        }
      }
      if reg(R_CUR) == 1 { set_reg(R_MODE, 0) }
    }
  }
}