Basic rotation

.gitignore

@@ -88,3 +88,4 @@ tags
 zig
 zig-out
 zig-cache
+zig-cache/*

src/cell.zig

@@ -1,6 +1,8 @@
 const std = @import("std");
 const SDL = @import("sdl2");
 
+const Color = @import("color.zig");
+
 const Self = @This();
 
 free: bool,
@@ -9,11 +11,6 @@ color: SDL.SDL_Color,
 pub fn init() Self {
     return Self{
         .free = true,
-        .color = SDL.SDL_Color{
-            .r = 0x00,
-            .g = 0x00,
-            .b = 0x00,
-            .a = 0xFF,
-        },
+        .color = Color.dark_grey,
     };
 }

src/color.zig

@@ -42,3 +42,15 @@ pub const purple = SDL.SDL_Color{
     .b = 203,
     .a = 255,
 };
+pub const dark_grey = SDL.SDL_Color{
+    .r = 40,
+    .g = 40,
+    .b = 40,
+    .a = 255,
+};
+pub const light_grey = SDL.SDL_Color{
+    .r = 80,
+    .g = 80,
+    .b = 80,
+    .a = 255,
+};

src/grid.zig

@@ -1,6 +1,7 @@
 const std = @import("std");
 const SDL = @import("sdl2");
 
+const Color = @import("color.zig");
 const Cell = @import("cell.zig");
 const utils = @import("utils.zig");
 
@@ -71,7 +72,7 @@ pub fn render(self: Self, renderer: *SDL.SDL_Renderer, cell_size: i32, pos_x: i3
 
             _ = SDL.SDL_SetRenderDrawColor(renderer, r, g, b, a);
             _ = SDL.SDL_RenderFillRect(renderer, &rect);
-            _ = SDL.SDL_SetRenderDrawColor(renderer, 0x33, 0x33, 0x33, 0xFF);
+            _ = SDL.SDL_SetRenderDrawColor(renderer, Color.light_grey.r, Color.light_grey.g, Color.light_grey.b, Color.light_grey.a);
             _ = SDL.SDL_RenderDrawRect(renderer, &rect);
         }
     }

src/piece.zig

@@ -6,9 +6,9 @@ const Grid = @import("grid.zig");
 
 const Self = @This();
 
-pub const Rot = enum(u2) {
-    right = 0,
-    left = 2,
+pub const Rot = enum {
+    right,
+    left,
 };
 
 pub const Type = enum {
@@ -112,7 +112,13 @@ pub fn rotate(self: Self, dir: Rot) Self {
 
         inline for (sequences) |seq| {
             inline for (seq) |_, i| {
-                new_piece.structure[seq[i][0]][seq[i][1]] = self.structure[seq[(i + @enumToInt(dir) - 1) % 4][0]][seq[(i + @enumToInt(dir) - 1) % 4][1]];
+                if (dir == Rot.right) {
+                    const refi = @mod((@intCast(i32, i) - 1), 4);
+                    new_piece.structure[seq[i][0]][seq[i][1]] = self.structure[seq[refi][0]][seq[refi][1]];
+                } else {
+                    const refi = @mod((@intCast(i32, i) + 1), 4);
+                    new_piece.structure[seq[i][0]][seq[i][1]] = self.structure[seq[refi][0]][seq[refi][1]];
+                }
             }
         }
     } else {
@@ -120,7 +126,13 @@ pub fn rotate(self: Self, dir: Rot) Self {
 
         inline for (sequences) |seq| {
             inline for (seq) |_, i| {
-                new_piece.structure[seq[i][0]][seq[i][1]] = self.structure[seq[(i + @enumToInt(dir) - 1) % 4][0]][seq[(i + @enumToInt(dir) - 1) % 4][1]];
+                if (dir == Rot.right) {
+                    const refi = @mod((@intCast(i32, i) - 1), 4);
+                    new_piece.structure[seq[i][0]][seq[i][1]] = self.structure[seq[refi][0]][seq[refi][1]];
+                } else {
+                    const refi = @mod((@intCast(i32, i) + 1), 4);
+                    new_piece.structure[seq[i][0]][seq[i][1]] = self.structure[seq[refi][0]][seq[refi][1]];
+                }
             }
         }
     }

zig-cache/h/8fb74d559dd889eac55495e9f1d9dc64.txt

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@@ -21,15 +21,15 @@
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