Texture upside-down in Billboards

[mightypanda]

I think i found a bug in the Billboard object.
Textures loaded from any format show upside-down.

I think the problem is in the CBillboardSceneNode.cpp file.
In the class constructors the assignement of texture coordinates:

Code: Select all

	vertices[0].TCoords.set(0.0f, 0.0f);
	vertices[0].Color = 0xffffffff;

	vertices[1].TCoords.set(0.0f, 1.0f);
	vertices[1].Color = 0xffffffff;

	vertices[2].TCoords.set(1.0f, 1.0f);
	vertices[2].Color = 0xffffffff;

	vertices[3].TCoords.set(1.0f, 0.0f);
	vertices[3].Color = 0xffffffff;

Should be this way:

Code: Select all

vertices[0].TCoords.set(1.0f, 1.0f);
	vertices[0].Color = 0xffffffff;

	vertices[1].TCoords.set(1.0f, 0.0f);
	vertices[1].Color = 0xffffffff;

	vertices[2].TCoords.set(0.0f, 0.0f);
	vertices[2].Color = 0xffffffff;

	vertices[3].TCoords.set(0.0f, 1.0f);
	vertices[3].Color = 0xffffffff;

According to the index order makes more sense, and now works.
I hope it helps.

Stefano

[Guest]

0.0,0.0 1.0,0.0
-------------------------
- -
- -
- -
- -
- -
- -
- -
-------------------------
0.0,1.0 1.0,1.0



SEE:
http://nexe.gamedev.net/directKnowledge ... oordinates

[mightypanda]

Ok, but look right after in the CBillboardSceneNode::render() method.

vertices[0].Pos = pos + horizontal + vertical;
vertices[1].Pos = pos + horizontal - vertical;
vertices[2].Pos = pos - horizontal - vertical;
vertices[3].Pos = pos - horizontal + vertical;

vertices[0] is the bottom right, and vertices[2] is the top left.
That's the reason of the flip down, so also tex coord should be the opposite.

[terefang]

vertices[0] is the bottom right, and vertices[2] is the top left.
That's the reason of the flip down, so also tex coord should be the opposite.

nope, i think rather the vertices should be fixed.