Code Translation: Ruby to JavaScript

Overview

The provided Ruby code is a class definition that contains a method for creating viewports based on the dimensions of the graphics and the game map. The translation will maintain the original logic and behavior in JavaScript.

Translated JavaScript Code

Here’s the equivalent JavaScript code for the Ruby class Spriteset_Map:

class Spriteset_Map {
    // Method: createViewports
    createViewports() {
        let dx, dy, dw, dh;

        if (Graphics.width > $game_map.width * 32 && !$game_map.loop_horizontal()) {
            dx = (Graphics.width - $game_map.width * 32) / 2;
        } else {
            dx = 0;
        }

        dw = Math.min(Graphics.width, $game_map.width * 32);
        if ($game_map.loop_horizontal()) {
            dw = Graphics.width;
        }

        if (Graphics.height > $game_map.height * 32 && !$game_map.loop_vertical()) {
            dy = (Graphics.height - $game_map.height * 32) / 2;
        } else {
            dy = 0;
        }

        dh = Math.min(Graphics.height, $game_map.height * 32);
        if ($game_map.loop_vertical()) {
            dh = Graphics.height;
        }

        this.viewport1 = new Viewport(dx, dy, dw, dh);
        this.viewport2 = new Viewport(dx, dy, dw, dh);
        this.viewport3 = new Viewport(dx, dy, dw, dh);
        this.viewport2.z = 50;
        this.viewport3.z = 100;
    }
}

Key Points of Translation

• The Ruby method create_viewports is translated to createViewports in JavaScript following camelCase convention.
• Logical conditions and mathematical operations remain consistent between the two languages.
• The Viewport class is instantiated in the same manner as in Ruby, assuming it is already defined in the JavaScript code.
• The properties for dx, dy, dw, and dh are accurately calculated using the same logic as presented in the Ruby version.

Conclusion

The translated JavaScript code now retains the original logic and is structured in a way that is idiomatic to JavaScript. It is ready for use in any JavaScript environment where the game graphics and viewport functionalities are defined.