block puzzle explosion

games/boybomb.p8

@@ -9,7 +9,6 @@ function _init()
     palt(11, true)
     palt(0, false)
     start_level(1)
-    last_gravity = t()
 end
 
 function _update()
@@ -138,38 +137,41 @@ end
 
 function start_level(n)
     start_scene("level")
+    last_gravity = t()
+    exploding = false
     puzzle_grid = {
-        {137, 0, 0, 0, 0, 0, 0, 137},
+        {137, 0, 0, 0, 0, 0, 0, 0},
+        {137, 137, 0, 0, 0, 0, 0, 0},
         {0, 0, 0, 0, 0, 0, 0, 0},
         {0, 0, 0, 0, 0, 0, 0, 0},
         {0, 0, 0, 0, 0, 0, 0, 0},
-        {0, 0, 0, 0, 0, 0, 0, 0},
+        {0, 0, 0, 0, 0, 0, 0, 137},
-        {137, 137, 137, 137, 137, 137, 137, 137},
+        {0, 0, 0, 0, 0, 0, 0, 137},
-        {137, 137, 137, 137, 137, 137, 137, 137},
+        {0, 0, 137, 0, 0, 137, 137, 137},
-        {137, 137, 137, 137, 137, 137, 137, 137},
         {137, 137, 137, 137, 137, 137, 137, 137},
     }
-    bomb_x = 4
+    bomb_x = 7
-    bomb_y = 4
+    bomb_y = 7
+    bomb_spr = make_sprite(bomb_x*8, bomb_y*8, "bomb_s", 0)
 end
 
 function draw_level()
-    local xoff = 0
-    local yoff = 0
     cls()
     map(0, 8, 0, 0, 16, 16)
     for y=1,GRID_H do 
         for x=1,GRID_W do
             n = puzzle_grid[y][x]
             if n > 0 then
-                spr(n, xoff+x*8, yoff+y*8)
+                spr(n, x*8, y*8)
             end
         end
     end
 
     print(" lobby", 90, 6)
 
-    spr(64, xoff+bomb_x*8, yoff+bomb_y*8)
+    bomb_spr.x = bomb_x * 8
+    bomb_spr.y = bomb_y * 8 
+    draw_sprite(bomb_spr)
 end
 
 function can_move(dx, dy)
@@ -181,39 +183,84 @@ function can_move(dx, dy)
     if puzzle_grid[ny][nx] ~= 0 then
         return false
     end
-    printh(ny, nx)
     return true
 end
 
 function update_level()
-    if btnp(⬅️) and can_move(-1, 0) then
+    -- update grid
-        bomb_x -= 1
+    fall_speed = 0.3
+    if exploding then
+        fall_speed /= 2
+        if bomb_spr.speed == 0 and bomb_spr.anim then
+            bomb_spr.anim = nil
+            puzzle_grid[bomb_y][bomb_x] = GRID_EXPLODE
         end
-    if btnp(➡️) and can_move(1, 0) then
-        bomb_x += 1
     end
-    if btnp(⬇️) and can_move(0, 1) then
+    if t() - last_gravity > fall_speed then
-        bomb_y += 1
-    end
-    if btnp(⬆️) and can_move(0, -1) then
-        bomb_y -= 1
-    end
-
-    -- gravity
-    if t() - last_gravity > 0.5 then
         last_gravity = t()
-        for y=GRID_H-1,1,-1 do
+        for y=GRID_H,1,-1 do
             for x=1,GRID_W do
-                if puzzle_grid[y+1][x] == 0 then
+                -- explode
+                if puzzle_grid[y][x] == GRID_EXPLODE then
+                    if y > 1 and puzzle_grid[y-1][x] == GRID_BOX then
+                        puzzle_grid[y-1][x] = GRID_EXPLODE
+                    end
+                    if y < GRID_H and puzzle_grid[y+1][x] == GRID_BOX then
+                        puzzle_grid[y+1][x] = GRID_EXPLODE
+                    end
+                    if x > 1 and puzzle_grid[y][x-1] == GRID_BOX then
+                        puzzle_grid[y][x-1] = GRID_EXPLODE
+                    end
+                    if x < GRID_W and puzzle_grid[y][x+1] == GRID_BOX then
+                        puzzle_grid[y][x+1] = GRID_EXPLODE
+                    end
+                    puzzle_grid[y][x] = 0
+                end
+                -- fall down
+                if y < GRID_H and puzzle_grid[y+1][x] == 0 then
                     puzzle_grid[y+1][x] = puzzle_grid[y][x]
                     puzzle_grid[y][x] = 0
                 end
             end
         end
-        if bomb_y < GRID_H and puzzle_grid[bomb_y+1][bomb_x] == 0 then
+    end
+
+    if exploding then
+        update_sprite(bomb_spr)
+        -- exploding means we're done
+        return
+    end
+
+    -- movement
+    if btnp(⬅️) then
+        if can_move(-1, 0) then
+            bomb_x -= 1
+        elseif can_move(-1, -1) then
+            bomb_x -= 1
+            bomb_y -= 1
+        end
+    end
+    if btnp(➡️) then
+        if can_move(1, 0) then
+            bomb_x += 1
+        elseif can_move(1, -1) then
+            bomb_x += 1
+            bomb_y -= 1
+        end
+    end
+    if btnp(❎) then
+        explode()
+    end
+    -- fall immediately
+    while bomb_y < GRID_H and puzzle_grid[bomb_y+1][bomb_x] == 0 do
         bomb_y += 1
     end
-    end
+end
+
+function explode()
+    exploding = true
+    explode_time = t()
+    bomb_spr.speed = 0.1
 end
 
 -- globals
@@ -227,7 +274,8 @@ _scenes.level = {start=nil, draw=draw_level, update=update_level}
 
 GRID_W = 8
 GRID_H = 9
-GRID_CRATE = 137
+GRID_BOX = 137
+GRID_EXPLODE = 76
 
 animations = {
     boy_walk={frames={[0]=2, 0, 4, 0}, w=2, h=2},

games/sprites.lua

@@ -20,7 +20,7 @@ function update_sprite(s)
         if now - s.last_update > s.speed then
             s.frame += 1
             s.last_update = now
-            if s.frame > #s.anim.frames then
+            if s.frame + 1 > #s.anim.frames then
                 if s.loop then 
                     s.frame = 0
                 else
@@ -28,10 +28,13 @@ function update_sprite(s)
                     s.frame = #s.anim.frames
                 end
             end
+
         end
     end
 end
 
 function draw_sprite(s)
+    if s.anim then
         spr(s.anim.frames[s.frame], s.x, s.y, s.anim.w, s.anim.h, s.flip_x, s.flip_y)
+    end
 end