if((k+f)%2==1){
GL11.glColor3f(.2f,.4f,.6f);
}else{
GL11.glColor3f(.5f,.4f,.3f);
}
WallSection ws = wc.wall.children.get(k);
Coordinate wsp0 = line.pointAlong(curPosWall/wallLength);
curPosWall += ws.length;
Coordinate wsp1 = line.pointAlong(curPosWall/wallLength);
wsp1.z = 0;
wsp0.z = 0;