This is how I render my cube:

 

         worldRendererIn.setTranslation(f5, f6, f7);

         for (int vertex = 0; vertex < 24; vertex++)
        {
            worldRendererIn.pos(rotatedCubeVectors[vertex][0], rotatedCubeVectors[vertex][1], rotatedCubeVectors[vertex][2])
                    .tex(params[vertex][0], params[vertex][1])
                    .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                    .endVertex();
        }

        worldRendererIn.setTranslation(0, 0, 0);

 

I basically draw the vanilla digging particle with my own rotation 6 times (so it's a cube). As you know, the vanilla digging particles have no shading or smooth lighting, it's just true color.

 

so how can I add this shading to a VertexBuffer quad?

 

Somebody told me that I can use VertexBuffer.normal(), but no matter what numbers I pass it, it makes the particles dance around (like if it was doing VertexBuffer.setTranslation()). There's also some kind of black ray flashing in the game...

 

EDIT:

 

Here you have an example of what I'm trying to achieve(the particle texture is darkening on the sides of the cube):

Hi

 

normal only works if the item lighting (opengl light sources) are on, and even then it can be hard to get right.

 

I think the easiest way is just to change the color for different faces, i.e. for example

.color(this.particleRed * faceGrey, this.particleGreen * faceGrey, this.particleBlue * faceGrey, this.particleAlpha).lightmap(j, k)

where faceGrey = (say) 0.8 for north and south, 0.6 for east and west, 1.0 for up, 0.5 for down

 

Some more info here

http://greyminecraftcoder.blogspot.com.au/2014/12/lighting-18.html

 

-TGG