drawtext sometimes work wrongly in 5.0

i use command like "drawtext(view, "Hello", 0,0,0, 0,.3,.1, 90,0,0, 1,0,0, .8);" in 5.0 . sometimes works well. sometimes works wrongly.
see attach

Linweixu,

I did not look at your model yet but the first thing that comes to mind is scaling. If you are using the draw code of an object then the draw commands will be scaled according to the object scale. This will cause things like text to change in size when the object changes size; this is probably why you are assuming that it does not work correctly.

Try using the drawtomodelscale() command before you use the drawtext() command. This should make the text size independent of the object scale.

Good Luck,
Brandon

thank you Brandon,you are right ,the reson is the zsize of souce is very small,so it look like messycode .the messycode like I used chinese in it,so My first impression is some thing wrong.