如何使用SpriteBatch绘制方法

Question

SpriteBatch batcher = new SpriteBatch();
batcher.draw(TextureRegion region,
             float x,
             float y,
             float originX,
             float originY,
             float width,
             float height,
             float scaleX,
             float scaleY,
             float rotation)

是什么意思originX,originY,scaleX,scaleY,rotation？你也可以给我一个他们使用的例子吗？

Answer 1

你为什么不看文件？

正如文档中所述,原点是左下角originX,originY是偏离此原点的.例如,如果您希望对象围绕其中心旋转,您将执行此操作.

originX = width/2;
originY = height/2;

通过指定scaleX,scaleY缩放图像,如果要使Sprite 2x更大,则将scaleX和scaleY都设置为数字2.

rotation 指定以度为单位的原点旋转.

此代码片段绘制围绕其中心旋转90度的纹理

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

int textureWidth = texture.getWidth();
int textureHeight = texture.getHeight();
float rotationAngle = 90f;

TextureRegion region = new TextureRegion(texture, 0, 0, textureWidth, textureHeight);

batch.begin();
batch.draw(region, 0, 0, textureWidth / 2f, textureHeight / 2f, textureWidth, textureHeight, 1, 1, rotationAngle, false);
batch.end();

或者在这里看一下教程.