Add scene controls and win/loss scenarios

Setup ability to check collisions and transition game scene

3 files changed, 87 insertions, 17 deletions

diff --git a/include/algs.lua b/include/algs.lua
index 2541102..c9e6438 100644
--- a/include/algs.lua
+++ b/include/algs.lua
@@ -104,7 +104,7 @@ local function pathfind(start_pos, target_pos, map)
     end
 
     if (push_moves(start_pos.x, start_pos.y, nil, visit_map, queue, target_pos)) then
-        return { dx = start_pos.x - target_pos.x, dy = start_pos.y - target_pos.y }
+        return { dx = target_pos.x - start_pos.x, dy = target_pos.y - start_pos.y }
     end
 
     while queue:empty() ~= true do
diff --git a/include/constants.lua b/include/constants.lua
index 922a35b..ab5fcf1 100644
--- a/include/constants.lua
+++ b/include/constants.lua
@@ -8,3 +8,8 @@ KEY_SPACE = ' '
 MAP_WALL = 1
 MAP_SPACE = 0
 MAP_VISITED = -1
+
+SCENE_INTRO = 0
+SCENE_LEVEL = 1
+SCENE_WIN = 2
+SCENE_LOSS = 3
\ No newline at end of file
diff --git a/include/defaults.lua b/include/defaults.lua
index a6cefe5..3651060 100644
--- a/include/defaults.lua
+++ b/include/defaults.lua
@@ -16,33 +16,44 @@ c_fatal(msg)
 --]]
 require "include.constants";
 local algs = require "include.algs";
+local hasLost = false;
+local hasWon = false;
+local hasIntro = false;
 
 --- setup random
 --math.randomseed(os.time())
 
 ---@param pressedKey number
 function onKeyPress(pressedKey)
+    scene = c_get_scene()
+    assert(type(scene) == "number", "scene is not a number")
+    if scene == SCENE_INTRO then
+        if pressedKey == KEY_S then
+            print("Lua start");
+            c_trigger_level_start();
+        end
+    elseif scene == SCENE_LEVEL then
+        dx = 0
+        dy = 0
+        if (pressedKey == KEY_W) then
+            dy = -1
+        elseif pressedKey == KEY_A then
+            dx = -1
+        elseif pressedKey == KEY_S then
+            dy = 1
+        elseif pressedKey == KEY_D then
+            dx = 1
+        end
 
-    dx = 0
-    dy = 0
-    if (pressedKey == KEY_W) then
-        dy = -1
-    elseif pressedKey == KEY_A then
-        dx = -1
-    elseif pressedKey == KEY_S then
-        dy = 1
-    elseif pressedKey == KEY_D then
-        dx = 1
+        c_move_player(dx, dy)
     end
-
-    c_move_player(dx, dy)
 end
 
 function onUpdate()
-    enemies = c_get_enemies() -- external
+    enemies = c_get_enemies()
     assert(type(enemies) == "table", "Enemies not a table")
 
-    player = c_get_player_position() -- external
+    player = c_get_player_position()
     assert(type(player) == "table", "Player is not a table")
 
     map = c_get_map();
@@ -50,7 +61,58 @@ function onUpdate()
 
     for _, v in ipairs(enemies) do
         local next = algs.pathfind(v, player, map)
-        c_move_enemy(v.id, next.dx, next.dy)
+        new_pos = c_move_enemy(v.id, next.dx, next.dy)
+        assert(type(new_pos) == "table", "new_pos is not a table")
+        if new_pos.x == player.x and new_pos.y == player.y then
+            c_trigger_loss()
+        end
+    end
+    treasures = c_get_treasures()
+    assert(type(treasures) == "table", "treasures is not a table")
+
+    for _, t in ipairs(treasures) do
+        if t.x == player.x and t.y == player.y then
+            c_score_treasure(t.id)
+            if #treasures == 1 then
+                c_trigger_win()
+            end
+        end
+    end
+end
+
+function onWin()
+    if hasWon == false then
+        hasWon = true
+        print("You WIN!!!!!!!!!")
+    end
+end
+
+function onLoss()
+    if hasLost == false then
+        hasLost = true
+        print("Oh no! You lost!")
+    end
+end
+
+function onIntro()
+    if hasIntro == false then
+        hasIntro = true
+        print([[
+...................
+..      dng      ..
+...................
+..    controls   ..
+...................
+.. start --  s   ..
+.. move  -- wasd ..
+.. quit  -- q    ..
+...................
+..      goal     ..
+...................
+.. Find treasure ..
+.. Avoid enemies ..
+...................
+        ]])
     end
 end
 
@@ -58,4 +120,7 @@ end
 return {
     onKeyPress = onKeyPress,
     onUpdate = onUpdate,
-}
\ No newline at end of file
+    onWin = onWin,
+    onLoss = onLoss,
+    onIntro = onIntro,
+}