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Change alpha value of mesh in Irrlicht
Posted: Thu Feb 23, 2017 3:56 pm
by Donald Duck
I have a IMeshSceneNode that is usually not transparent, and I would like to make it semi-transparent under certain conditions. Something like this:
Code: Select all
if(condition){
mesh->setAlpha(128); //semi-transparent
}
else{
mesh->setAlpha(255); //not transparent
}
Is there any way I can do this in Irrlicht?
Re: Change alpha value of mesh in Irrlicht
Posted: Thu Feb 23, 2017 4:40 pm
by MartinVee
Searching the forums, I found
that snippet of code that should do what you want :
Code: Select all
IAnimatedMesh* mesh = smgr->getMesh("sydney.md2");
IMeshManipulator *manipulator = smgr->getMeshManipulator();
int alpha = 128;
manipulator->setVertexColorAlpha(mesh->getMesh(0),alpha);
Re: Change alpha value of mesh in Irrlicht
Posted: Fri Feb 24, 2017 1:24 am
by CuteAlien
Basically as MartinVee wrote, but you also need a material which uses vertex colors (EMT_TRANSPARENT_VERTEX_ALPHA or a custom shader ... for others you have to experiment but most won't use it).
Re: Change alpha value of mesh in Irrlicht
Posted: Sun Feb 26, 2017 12:37 pm
by Mel
So far, materials have the difuse color which also might change the alpha value, you can try that.