如何在LibGDX中绘制BitmapFont？

Question

我认真地打赌我做了一些愚蠢的事情,似乎无法注意到它.

package com.me.mygdxgame;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Texture.TextureFilter;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;

public class Locked implements ApplicationListener
{
    private OrthographicCamera camera;
    private SpriteBatch batch;
    private Texture texture;
    private Sprite sprite;
    private BitmapFont font;
    private CharSequence str = "Hello World!";
    private float width;
    private float height;

    @Override
    public void create()
    {
        width = Gdx.graphics.getWidth();
        height = Gdx.graphics.getHeight();

        camera = new OrthographicCamera(1, height / width);
        batch = new SpriteBatch();

        texture = new Texture(Gdx.files.internal("data/libgdx.png"));
        texture.setFilter(TextureFilter.Linear, TextureFilter.Linear);

        TextureRegion region = new TextureRegion(texture, 0, 0, 512, 275);

        sprite = new Sprite(region);
        sprite.setSize(0.9f, 0.9f * sprite.getHeight() / sprite.getWidth());
        sprite.setOrigin(sprite.getWidth() / 2, sprite.getHeight() / 2);
        sprite.setPosition(-sprite.getWidth() / 2, -sprite.getHeight() / 2);

        font = new BitmapFont(Gdx.files.internal("data/digib.fnt"),
                Gdx.files.internal("data/digib.png"), false);
    }

    @Override
    public void dispose()
    {
        batch.dispose();
        texture.dispose();
    }

    @Override
    public void render()
    {
        Gdx.gl.glClearColor(1, 1, 1, 1);
        Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);

        batch.setProjectionMatrix(camera.combined);
        batch.begin();
        font.setColor(0.0f, 0.0f, 0.0f, 1.0f);

        //sprite.draw(batch);
        font.draw(batch, str, width*0.5f, height*0.5f);
        batch.end();
    }

    @Override
    public void resize(int width, int height)
    {
    }

    @Override
    public void pause()
    {
    }

    @Override
    public void resume()
    {
    }
}

该项目是使用他们提供的模板工具生成的gdx-setup-ui.jar 正如您在代码中看到的那样,我没有费心去除默认代码(只是一些简单的绘图代码来渲染LibGDX徽标).

因此,通过干净生成的项目,我在此处遵循了本指南 http://code.google.com/p/libgdx-users/wiki/addingText2D

最后使用上面提供的代码到达.

问题是,为什么不会!@#$ ing文字显示!？我改变了这么多次,但仍然没有运气:

我错过了什么？

仅供参考:字体很好,我把它们放到另一个游戏中然后就可以了.

Answer 1

尝试更改投影矩阵,如下所示:

Matrix4 normalProjection = new Matrix4().setToOrtho2D(0, 0, Gdx.graphics.getWidth(),  Gdx.graphics.getHeight());

batch.setProjectionMatrix(normalProjection);

Answer 2

我所做的就是

    spriteBatch = new SpriteBatch();
 font = new BitmapFont(Gdx.files.internal("data/nameOfFont.fnt"),
         Gdx.files.internal("data/nameOfFont.png"), false);

并在渲染方法

spriteBatch.begin();
 font.setColor(1.0f, 1.0f, 1.0f, 1.0f);
 font.draw(spriteBatch, "some string", 25, 160);
 spriteBatch.end();

您可以在我的博客上阅读更多相关信息:http://algorhymes.wordpress.com/2012/11/17/javalibgdx-fonts/

Answer 3

就个人而言,我不是将所有字体转换为.fnt格式的忠实粉丝.如果某种字体需要不同的尺寸,则必须花费大量时间(和应用空间)进行所有转换.

您可以使用FreeType扩展并直接从.ttf加载

FreeTypeFontGenerator generator = new FreeTypeFontGenerator(fontFile);
BitmapFont font15 = generator.generateFont(15);
BitmapFont font22 = generator.generateFont(22);
generator.dispose();

更多信息在这里

渲染的方式与watis解释的相同.