Add input buffer.

src/main.zig

@@ -5,6 +5,7 @@ const std = @import("std");
 const assert = std.debug.assert;
 const format = std.fmt.format;
 const maxInt = std.math.maxInt;
+const log = std.log.default.debug;
 
 const Level = @import("level.zig");
 const Vec2 = @import("vec2.zig");
@@ -23,27 +24,40 @@ pub fn main() !void {
     // Limit FPS for performance.
     ray.SetTargetFPS(60);
 
-    // Create level
+    // Create level.
     var level: Level = try Level.init(allocator, 128, 128);
     defer level.deinit(allocator);
 
-    // Create camera
+    // Create camera.
     var camera: Vec2 = Vec2.init(0, 0);
 
-    while (!ray.WindowShouldClose()) {
-        // Temp code: move camera with arrow keys.
-        if (ray.IsKeyDown(ray.KEY_LEFT) and camera.x > 0)
-            camera.x -= 1;
-        if (ray.IsKeyDown(ray.KEY_RIGHT) and
-            camera.x < comptime maxInt(Vec2.int_type))
-            camera.x += 1;
-        if (ray.IsKeyDown(ray.KEY_UP) and camera.y > 0)
-            camera.y -= 1;
-        if (ray.IsKeyDown(ray.KEY_DOWN) and
-            camera.y < comptime maxInt(Vec2.int_type))
-            camera.y += 1;
+    // Create input buffer (ASCII).
+    const input_buffer_len = 256;
+    var input_buffer: [input_buffer_len]u32 = undefined;
+    comptime {
+        var i: u16 = 0;
+        while (i < input_buffer_len) : (i += 1) {
+            input_buffer[i] = 0;
+        }
+    }
+    var input_cursor: u16 = 0;
+
+    while (!ray.WindowShouldClose()) {
+        // Get keyboard input.
+        var key = ray.GetCharPressed();
+        // Check if more characters have been pressed.
+        while (key != 0) {
+            // Add key to buffer.
+            input_buffer[input_cursor] = @intCast(u32, key);
+            log("Key pressed: {}", .{key});
+            input_cursor += 1;
+            // Avoid writing out of memory.
+            if (input_cursor >= input_buffer_len)
+                input_cursor = input_buffer_len - 1;
+
+            key = ray.GetCharPressed();
+        }
 
-        // Put all draw code after this.
         ray.BeginDrawing();
         defer ray.EndDrawing();