map scrolling isn't sideways

Signed-off-by: Christine Dodrill <me@christine.website>

src/main.zig

@@ -29,7 +29,7 @@ var sound_timer: u8 = 0;
 var textBuf: [160]u8 = undefined;
 var done: bool = false;
 
-var camera = Point{ .x = 0, .y = 0 };
+var camera = Point{ .x = 32, .y = 0 };
 
 var state: sh0rk.State = .Gameplay;
 
@@ -92,6 +92,21 @@ fn map_colors() void {
     }
 }
 
+fn clampCamera() void {
+    if (camera.x < 0) {
+        camera.x = 0;
+    }
+    if (camera.y < 0) {
+        camera.y = 0;
+    }
+    if (camera.x >= (map.width * 8) - screen_width * 8) {
+        camera.x = (map.width * 8) - screen_width * 8;
+    }
+    if (camera.y >= (map.height * 8) - screen_height * 8) {
+        camera.y = (map.height * 8) - screen_height * 8;
+    }
+}
+
 fn drawMap() !void {
     map_colors();
 
@@ -100,28 +115,23 @@ fn drawMap() !void {
     var startRow = @divTrunc(camera.y, tile_size);
     var endRow = startRow + screen_height;
 
-    if (!done) {
-        var buf = fmt.bufPrint(&textBuf, "{},{}: {},{}", .{ startCol, startRow, endCol, endRow }) catch unreachable;
-        w4.trace(buf);
-    }
-
     var col: i16 = startCol;
-    while (col < endCol) {
+    while (col < endCol + 1) {
         var row: i16 = startRow;
         defer col += 1;
-        while (row < endRow) {
+        while (row < endRow + 1) {
             defer row += 1;
 
             if (col < map.width and row < map.height) {
                 var tile = map.get_tile(col, row);
                 var world = Point{ .x = col * 8, .y = row * 8 };
                 var scr = world_to_screen(world);
-                if(!done) {
+                // if(!done) {
-                    var buf = fmt.bufPrint(&textBuf, "{},{}: {},{}", .{ row, col, scr.x, scr.y }) catch unreachable;
+                //      var buf = fmt.bufPrint(&textBuf, "{},{}: {},{}", .{ row, col, scr.x, scr.y }) catch unreachable;
-                    w4.trace(buf);
+                //      w4.trace(buf);
-                }
+                // }
 
-                draw_tile(tile, scr.y,  scr.x);
+                draw_tile(tile, scr.x, scr.y);
             }
         }
     }
@@ -182,16 +192,20 @@ fn move_mara(gamepad: w4.GamePad) void {
 
     switch (mara_direction) {
         .Up => {
-            camera.x -= mara_speed;
+            camera.y -= mara_speed;
+            mara_box.base.y -= mara_speed;
         },
         .Down => {
-            camera.x += mara_speed;
+            camera.y += mara_speed;
+            mara_box.base.y += mara_speed;
         },
         .Left => {
-            camera.y -= mara_speed;
+            camera.x -= mara_speed;
+            mara_box.base.x -= mara_speed;
         },
         .Right => {
-            camera.y += mara_speed;
+            camera.x += mara_speed;
+            mara_box.base.x += mara_speed;
         },
     }
 }
@@ -271,6 +285,9 @@ fn storydump() !void {
 
 export fn update() void {
     defer frame_count += 1;
+    if (frame_count % 60 == 0) {
+        done = false;
+    }
 
     switch (state) {
         .Title => title() catch unreachable,
@@ -281,6 +298,7 @@ export fn update() void {
 
 fn gameplay() !void {
     defer done = true;
+    defer clampCamera();
     if (sound_timer != 0) {
         sound_timer -= 1;
     }
@@ -322,12 +340,12 @@ fn gameplay() !void {
         }
     }
 
-    if (mara_box.base.x <= 0) {
+    if (mara_box.base.x < 0) {
         mara_box.base.x = 0;
         bonk();
     }
 
-    if (mara_box.base.y <= 0) {
+    if (mara_box.base.y < 0) {
         mara_box.base.y = 0;
         bonk();
     }
@@ -375,7 +393,31 @@ fn draw_mara() void {
     };
     var step: u32 = if (mara_frame) 1 else 0;
 
-    w4.blitSub(&sprites.Mara, mara_box.base.x, mara_box.base.y, 16, 16, 16 * (frame + step), 0, 96, flags);
+    w4.blitSub(
+        &sprites.Mara,
+        mara_box.base.x,
+        mara_box.base.y, 
+        16, 
+        16, 
+        16 * (frame + step), 
+        0, 
+        96, 
+        flags,
+    );
+
+    var scr = world_to_screen(mara_box.base);
+
+    w4.blitSub(
+        &sprites.Mara,
+        scr.x,
+        scr.y, 
+        16, 
+        16, 
+        16 * (frame + step), 
+        0, 
+        96, 
+        flags,
+    );
 }
 
 pub fn panic(msg: []const u8, st: ?*std.builtin.StackTrace) noreturn {

src/maps/dungeon.zig

@@ -17,7 +17,7 @@ pub fn get_tile(x: i32, y: i32) u9 {
     if (x >= width or y >= height) {
         return 0;
     }
-    return data[@intCast(u32, x) * height + @intCast(u32, y)];
+    return data[@intCast(u32, y) * width + @intCast(u32, x)];
 }
 pub const tileset: Tileset = .Dungeon;
 pub const ts_width = 14;

src/maps/overworld.zig

@@ -17,7 +17,7 @@ pub fn get_tile(x: i32, y: i32) u9 {
     if (x >= width or y >= height) {
         return 0;
     }
-    return data[@intCast(u32, x) * height + @intCast(u32, y)];
+    return data[@intCast(u32, y) * width + @intCast(u32, x)];
 }
 pub const tileset: Tileset = .Rpg;
 pub const ts_width = 34;

src/sh0rk.zig

@@ -44,7 +44,11 @@ pub const Rect = packed struct {
     }
 
     pub fn collides(this: @This(), other: @This()) bool {
-        return this.base.x < other.base.x + other.width and this.base.x + this.width > other.base.x and this.base.y < other.base.y + other.height and this.base.y + this.height > other.base.y;
+        return 
+            this.base.x < other.base.x + other.width and
+            this.base.x + this.width > other.base.x and
+            this.base.y < other.base.y + other.height and
+            this.base.y + this.height > other.base.y;
     }
 };
 

src/tools/genmap.js

@@ -31,7 +31,7 @@ out += `pub fn get_tile(x: i32, y: i32) u9 {
     if (x >= width or y >= height) {
         return 0;
     }
-    return data[@intCast(u32, x) * height + @intCast(u32, y)];
+    return data[@intCast(u32, y) * width + @intCast(u32, x)];
 }
 `;