Java LibGDX中10x10地图正方形尺寸计算错误，屏幕缩放时失效

问题说明 #

我正在用Java LibGDX开发一款带10x10地图的游戏，需要计算正方形尺寸以让地图完全适配屏幕。

变量定义 #

• rect_x_end, rect_y_end：正方形的x、y轴尺寸
• screen_x, screen_y：屏幕尺寸
• len_map_x, len_map_y：地图宽高，均为10

原计算方式 #

我最初采用以下逻辑计算正方形尺寸：

rect_x_end = screen_x / len_map_x
rect_y_end = screen_y / len_map_y

正常示例 #

在屏幕尺寸为640x480时，计算结果正常：

64 = 640 / 10
48 = 480 / 10

但调整屏幕尺寸后，该计算方法得出的结果错误。此前我在Python Pygame中实现过类似逻辑，运行完全正常。

附完整代码（kucer0043.java） #

package com.kucer0043.game;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.utils.ScreenUtils;

public class kucer0043 extends ApplicationAdapter {
    private ShapeRenderer shapeRenderer;
    private int map_size;

    @Override
    public void create () {
        shapeRenderer = new ShapeRenderer();
        map_size = 10; // square map size
    }

    @Override
    public void render () {
        ScreenUtils.clear(0.5f, 0.5f, 0.5f, 1);
        int rect_x_end = Gdx.graphics.getWidth() / map_size;
        int rect_y_end = Gdx.graphics.getHeight() / map_size;
        int map_x = Gdx.input.getX() / rect_x_end;
        int map_y = Gdx.input.getY() / rect_y_end;
        int x = map_x * rect_x_end;
        int y = Gdx.graphics.getHeight() - (map_y + 1) * rect_y_end;
        shapeRenderer.begin(ShapeRenderer.ShapeType.Filled);
        shapeRenderer.setColor(0f,1f,0f,0f);
        shapeRenderer.rect(x,y, rect_x_end, rect_y_end);
        shapeRenderer.end();

    }
    
    @Override
    public void dispose () {
    }
}

内容的提问来源于stack exchange，提问作者user19345539