/*
 * Descent 3
 * Copyright (C) 2024 Parallax Software
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

left_height = cp[vlb].sy - cp[vlt].sy;
if (left_height == 0)
  left_height = 1;

Left_x = cp[vlt].sx;
Left_z = cp[vlt].z;
Delta_left_z = (cp[vlb].z - cp[vlt].z) / left_height;
Delta_left_x = (cp[vlb].sx - cp[vlt].sx) / left_height;
next_break_left = cp[vlb].sy;