java 如何使用 SpriteBatch 绘制方法
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how to use SpriteBatch draw method
提问by vishal
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)
What is the meaning of originX, originY, scaleX, scaleY, rotation? Also can you please give me an example of their use?
originX, originY, scaleX, scaleY,是什么意思rotation？另外你能给我举个例子说明它们的用法吗？
回答by jellyfication
Why don't you look into docs?
你为什么不看看文档？
As stated in docs, origin is bottom left corner, originX, originYare offsets from this origin.
For example if you want object rotate around his center, you will do this.
如文档中所述，原点是左下角originX，originY是与该原点的偏移量。例如，如果您希望对象围绕他的中心旋转，您可以这样做。
originX = width/2;
originY = height/2;
By specifing scaleX, scaleY, you scale the image, if you want to make Sprite 2x larger, you will set both scaleX and scaleY to number 2.
通过指定scaleX, scaleY，您可以缩放图像，如果您想让 Sprite 变大 2 倍，您需要将 scaleX 和 scaleY 都设置为 number 2。
rotationspecifies rotation around origin in degrees.
rotation指定绕原点的旋转度数。
This code snippet draws texture rotated by 90 degrees around its center
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();
or take a look at tutorial here.
或在这里查看教程。
