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#define	ISTELETEX(name)	((name)[0] == '*' && (name)[1] == 't' && (name)[2] == 'e' && (name)[3] == 'l' && (name)[4] == 'e')

/*
=================
Mod_DetectWaterTrans

detect if a model has been vised for translucent water
=================
*/
qboolean Mod_DetectWaterTrans (model_t *mod)
{
	int		i, j;
	byte		*vis;
	mleaf_t		*leaf;
	msurface_t	**surf;

	// no visdata
	if (!mod->visdata)
		return true;

	for (i = 0 ; i < mod->numleafs ; i++)
	{
		// leaf 0 is the solid leaf, leafs go to numleafs + 1
		leaf = &mod->leafs[i+1];

		// not interested in these leafs
		if (leaf->contents >= CONTENTS_EMPTY || leaf->contents == CONTENTS_SOLID || leaf->contents == CONTENTS_SKY)
			continue;

		// check marksurfaces for a water texture
		surf = leaf->firstmarksurface;

		for (j = 0 ; j < leaf->nummarksurfaces ; j++, surf++)
		{
			// bad surf/texinfo/texture (some old maps have this from a bad qbsp)
			if (!surf || !(*surf) || !(*surf)->texinfo || !(*surf)->texinfo->texture)
				continue;

			// not interested in teleports
			if (!ISTELETEX((*surf)->texinfo->texture->name))
				goto LeafOK;
		}

		// no water/etc textures here
		continue;

LeafOK:
		// get the decompressed vis
		vis = Mod_DecompressVis (leaf->compressed_vis, mod);

		// check the other leafs
		for (j = 0 ; j < mod->numleafs ; j++)
		{
			// in the PVS
			if (vis[j>>3] & (1 << (j & 7)))
			{
				mleaf_t	*visleaf = &mod->leafs[j + 1];

				// the leaf we hit originally was under water/slime/lava, and a
				// leaf in it's pvs is above water/slime/lava.
				if (visleaf->contents == CONTENTS_EMPTY)
					return true;
			}
		}
	}

	// found nothing
	return false;
}