java - 使用 LibGdx 在 Java 中对 Sprite Sheet 进行动画处理

Question

我这里有一些代码，它获取一个 Sprite 表，并通过获取图像的长度和宽度并将其按行和列划分，将其分成单独的 Sprite 。这适用于我的测试 Sprite 表，但不适用于我实际要在游戏中使用的 Sprite 表。

我的动画课在这里:

package Simple;


    import com.badlogic.gdx.Gdx;
    import com.badlogic.gdx.graphics.Texture;
    import com.badlogic.gdx.graphics.g2d.Batch;
    import com.badlogic.gdx.graphics.g2d.TextureRegion;
    import com.badlogic.gdx.graphics.g2d.Animation;

    public class RunningMan {
        private Texture texture;
        private TextureRegion[] walkFrames;
        private Animation walkAnimation;
        private float stateTime = 0f;
        private TextureRegion currentFrame;
        int rows = 5;
        int cols = 6;
        public RunningMan(Texture texture) {
            this.texture = texture;
            TextureRegion[][] tmp = TextureRegion.split(texture, texture.getWidth() / cols, texture.getHeight() / rows);  // split the sprite sheet up into its 30 different frames
            walkFrames = new TextureRegion[rows * cols];
            int index = 0;
            for(int i = 0; i < rows; i++) {
                for (int j = 0; j < cols; j++) {
                    walkFrames[index++] = tmp[i][j];    // Put the 30 frames into a 1D array from the 2d array
                }
            }
            walkAnimation = new Animation(0.06f, walkFrames);  // initialize the animation class
            stateTime = 0f;
        }

        public void draw(Batch batch) {
            stateTime += Gdx.graphics.getDeltaTime();   // stateTime is used to determine which frame to show
            if(stateTime > walkAnimation.getAnimationDuration()) stateTime -= walkAnimation.getAnimationDuration();  // when we reach the end of the animation, reset the stateTime
            currentFrame = walkAnimation.getKeyFrame(stateTime);    // Get the current Frame

            batch.draw(currentFrame,50,50); // draw the frame
        }
    }

我运行动画的类在这里:

package Simple;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;

public class Animation extends ApplicationAdapter {
    SpriteBatch batch;
    RunningMan man;

    @Override
    public void create () {
        batch = new SpriteBatch();
        man = new RunningMan(new Texture(Gdx.files.internal("WalkingMan.png")));
    }

    @Override
    public void render () {
        Gdx.gl.glClearColor(1, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
        batch.begin();
        man.draw(batch);
        batch.end();
    }
}

当我使用 WalkingMan.png 时，代码运行完美。但是当我使用任何其他 Sprite 表时，例如 WalkingWoman.jpg(我不担心这个不透明)，当列和行相应调整时，对齐会关闭。有什么建议么？

WalkingMan.png

WalkingWoman.jpg

Answer 1

动画类似乎通过假设 spritesheet 图像中的所有帧均匀分布来将源图像分割为帧。因此，对于 WalkingMan 图像，512x512px 的原始图像被分为 30 个帧，每个帧宽 85.33px(512/6 列)，高 102.4px(512/5 行)。

如您所说，如果您调整 WalkingWoman 图像的列数和行数(即 1300x935)，您将获得 36 个帧，每个帧宽 144.44 像素(1300/9 列)，高 233.75 像素(935/4 行) )。

问题在于 WalkingWoman spritesheet 的每个帧的间距不均匀。如果将第一帧从图像中分离出来，您会得到以下结果:

see how her foot is cut off on the right

WalkingMan 图像的每个图像都放置在 spritesheet 中大小相同的边界框中。您只需确保 WalkingWoman 工作表的每个框架以相同的方式均匀分布。