RegionAttachment.java 文件源码

public void setRegion (TextureRegion region) {
    if (region == null) throw new IllegalArgumentException("region cannot be null.");
    this.region = region;
    float[] vertices = this.vertices;
    if (region instanceof AtlasRegion && ((AtlasRegion)region).rotate) {
        vertices[U3] = region.getU();
        vertices[V3] = region.getV2();
        vertices[U4] = region.getU();
        vertices[V4] = region.getV();
        vertices[U1] = region.getU2();
        vertices[V1] = region.getV();
        vertices[U2] = region.getU2();
        vertices[V2] = region.getV2();
    } else {
        vertices[U2] = region.getU();
        vertices[V2] = region.getV2();
        vertices[U3] = region.getU();
        vertices[V3] = region.getV();
        vertices[U4] = region.getU2();
        vertices[V4] = region.getV();
        vertices[U1] = region.getU2();
        vertices[V1] = region.getV2();
    }
}