Accordingly, if you want to map the lower left corner (-1, -1) of the cube's front face to the texture's lower left corner, you must assign the texture coordinates (0, 1) to vertex 0.
相应地，如果您需要将立方体正面的左下角映射到纹理的左下角，必须将纹理坐标(0,1)指派给顶点0。
2
WKT uses the lower left corner for (0, 0) and all positive X and Y coordinates are to the right and upwards, respectively.
WKT 定义左下角为(0, 0)，所有为正的 X 和 Y 坐标都在这个点的右边和上边。
3
Therefore, Flex picks up the local coordinates of a point near the bottom right corner of the component in question and applies "local to global" conversions to it.