Ogre Forums

Posted: **Tue Oct 09, 2018 2:05 am**

I'm using 2.1 and have no lighting. I saw in another post that to change the color of my wireframe, I should setDiffuse() on an Ogre::HlmsPbsDatablock. I did this, but my wireframe is still black.

Anyone help?

Posted: **Tue Oct 09, 2018 3:01 pm**

I'm pretty sure it's still black because you don't have lighting. You can either add lighting or switch to HlmsUnlitDatablock.

I'm assuming you already know how to set up the different hlms and datablocks.
For the unlit I remember reading somewhere that you should something like this:

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HlmsUnlitDatablock unlitDatablock  = ... // "Standard" datablock creation

unlitDatablock.setUseColour(true);
unlitDatablock.setColour(ColourValue(1, 0, 0, 0)); // Red colour

The above works for me (Ogre 2.1).

Hope that helps!

Posted: **Sat Oct 13, 2018 2:48 am**

Here's how I'm trying to set up HlmsUnlitDatablock.

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        Ogre::HlmsManager* hlmsmgr =  Ogre::Root::getSingleton().getHlmsManager();
            
        Ogre::HlmsUnlitDatablock *hlmsunlit = static_cast<Ogre::HlmsUnlitDatablock*>
                (hlmsmgr->getHlms(Ogre::HLMS_UNLIT));
            
        Ogre::HlmsMacroblock mb = Ogre::HlmsMacroblock();
        mb.mPolygonMode = Ogre::PM_WIREFRAME;
        mb.mCullMode = Ogre::CULL_NONE;
                
        Ogre::HlmsUnlitDatablock *udb = static_cast<Ogre::HlmsUnlitDatablock*>
            (hlmsunlit->createDatablock("MyDatablock", "MyDatablock",
            mb, Ogre::HlmsBlendblock(), Ogre::HlmsParamVec()));
        udb.setUseColour(true);
        udb.setColour(ColorValue(1, 0, 0, 0));

And here's the error I'm getting ...

Code: Select all

test_graphics_sys.cpp: In member function ‘virtual void TestGraphicsSystem::createTestScene()’:          
test_graphics_sys.cpp:66:44: error: invalid static_cast from type ‘Ogre::Hlms*’ to type ‘Ogre::HlmsUnlitDatablock*’   
     (hlmsmgr->getHlms(Ogre::HLMS_UNLIT));

And I am calling registgerHlms().

Any ideas?

Posted: **Sat Oct 13, 2018 7:14 am**

Isn't the 4th parameter of colour alpha? If so try 1 there instead of 0.

Posted: **Sat Oct 13, 2018 8:16 am**

///// Ogre::HlmsUnlitDatablock *hlmsunlit = static_cast<Ogre::HlmsUnlitDatablock*>
///// (hlmsmgr->getHlms(Ogre::HLMS_UNLIT));

Ogre::HlmsUnlit *hlmsunlit = static_cast<Ogre::HlmsUnlit*>
(hlmsmgr->getHlms(Ogre::HLMS_UNLIT));

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