IMeshManipulator::setVertexColorAlpha

fitfool · Post by **fitfool** » Thu Jun 26, 2008 1:25 am

I Have a problem, and i may have descovered a bug. If i call setVertexColorAlpha( someMesh, 255 ), and set it's material to EMT_TRANSPARENT_VERTEX_ALPHA it is perfectly visible, as expected. But if i call setVertexColorAlpha( someMesh, 0 ), it is somewhat visible, but not invisible, as expected? Whats going on?

tknas

fitfool · Post by **fitfool** » Sat Jun 28, 2008 4:40 am

Anyone?

rogerborg · Post by **rogerborg** » Sat Jun 28, 2008 9:01 am

Any chance of a minimal test app and resources that demonstrate the problem? I don't want to blame user error. Well, I want to, but I won't.

fitfool · Post by **fitfool** » Sat Jun 28, 2008 11:44 pm

Hmm, ive found a slight work around.

Here is an example that doesnt work.

Code: Select all

SColor S;
S.setAlpha( 0 );
S.setRed( 255 );
S.setGreen( 255 );
S.setBlue( 255 );
MeshManipulator->setVertexColors( Mesh, S );

The mesh would still be partially visible.

but this, seems to work, even though it doesnt give the exact effect youd like(it will darken the mesh)

Code: Select all

SColor S;
short Alpha = 10;
S.setAlpha( Alpha );
S.setRed( Alpha );
S.setGreen( Alpha );
S.setBlue( Alpha );
MeshManipulator->setVertexColors( Mesh, S );

Im pretty sure its a bug.

rogerborg · Post by **rogerborg** » Sun Jun 29, 2008 10:51 am

fitfool wrote:Im pretty sure its a bug.

I'm not at all sure that your object has anything behind it to blend with, which is why I'm asking for a test app and resources.