Irrlicht Engine

smgr:addTextSceneNode(font,"i have a dream,one day i have a car!",render.video.SColor(255,0,255,255),0,render.core.vector3d(0,30,-500))
i add some text in the scene,and i want to scale them,how???

If it's a scene node, you should be able to do something like this:
So, the ITextSceneNode should have a member function named setScale. You seem to be using a different language than C/C++, though, so I'm not sure how it will translate.

edit: Yeah, I don't know Lua, sorry. :/

i use irrlua ,and i tried your method,but it did't work,thank you

This node doesn't scale! It uses something like a static text to overlay text, so the size is dependent on the actual font size, it also draws on top of all other geometry too (like a gui element does)

You need a larger font to render larger texts, that, until Irrlicht implements signed distance field font rendering, which is shader dependant, but also able to scale bitmap fonts with vector-like quality. I guess the SDF rendering is overkill, but allows free scaling of fonts

https://www.youtube.com/watch?v=CGZRHJvJYIg

IBillboardTextSceneNode can do some zoom (but it's not resizing the font, but zooming the bitmap). ITextSceneNode can't.

One other solution: Create fonts with different sizes and switch between them.

Or check font-wrappers for ttf like the CGUIFont classes here: https://bitbucket.org/mzeilfelder/irr-p ... -micha/src (wrapper is based on some other ttf code wrapper in forum: http://irrlicht.sourceforge.net/forum/v ... =6&t=37296). Thought not sure how to use that with irrlua as I'm not familiar with that.