线方向影响线贴图方向


为什么从左往右的线，显示的贴图和原本图片方向颠倒。
从右往左，显示的贴图就正常

No source file, test, or entry point is named. Reproduce the reported line-texture behavior with lines drawn in both directions, then trace the line rendering path to identify where texture orientation is determined. Done means the texture has the intended orientation regardless of line direction, with a regression test if the project provides a suitable rendering test.

Written by the indexing model from the issue text.