billboard behind transparent billboard

[skajake]

I have 2 billboards, one behind the other. The first one is a crosshairs that has a transparency. The second is a bullet fired from the gun. The bullet billboard does not show throught the transparency of the crosshair. When I fire, then move the crosshair to the side, the bullet shows. Otherwise, the crosshair transparency works fine with the level mesh. Any ideas?

crosshair:

Code: Select all

bill = smgr->addBillboardSceneNode(camera);
bill->setPosition(vector3df(0,0,2));
bill->setMaterialType(video::EMT_TRANSPARENT_ALPHA_CHANNEL );
bill->setMaterialFlag(video::EMF_LIGHTING, false);
bill->setSize(core::dimension2d<f32>(0.21f, 0.21f));
ITexture * texture = driver->getTexture((dir + "cross.bmp").c_str());
driver->makeColorKeyTexture(texture, SColor(255,0,0,0)); 
bill->setMaterialTexture(0, texture);

bullet node that is fired from the gun:

Code: Select all

node= smgr->addBillboardSceneNode(0,core::dimension2d<f32>(25,25), start);
node->setMaterialFlag(video::EMF_LIGHTING, false);
node->setMaterialTexture(0, device->getVideoDriver()->getTexture((dir + "fireball.bmp").c_str()));
node->setMaterialType(video::EMT_TRANSPARENT_ADD_COLOR);

[/code]

[knightoflight]

look thread:
http://irrlicht.sourceforge.net/phpBB2/ ... php?t=3773

[Peter Müller]

Transparend nodes will be rendered without the z buffer.

[skajake]

Is there a workaround for this issue? Perhaps using a model for the crosshairs?

EDIT: Recompiling in OPENGL fixed this issue.

[knightoflight]

Hi Skajake,
i opened a thread in "Bug Report" for this, you say only recompiling the engine kills the bug ? No changes in the engine only recompiling ?

[skajake]

Actually, the problem was occuring under DirectX8, recompiling in OpenGL solved the issue. So must be a bug anyways.

[knightoflight]

you mean you switched in the createDevice to OPENGL. Then the bug isnt away, you only worked around and use OPENGL.