case FACE_B_X:
{
frontNormal = MathUtil.scale(normal,-1);
front = posB.dot(frontNormal) + hB.x;
sideNormal = rotB.col2;
float side = posB.dot(sideNormal);
negSide = -side + hB.y;
posSide = side + hB.y;
negEdge = EDGE3;
posEdge = EDGE1;
computeIncidentEdge(incidentEdge, hA, posA, rotA, frontNormal);