gst/goom/v3d.c

/* Goom Project
 * Copyright (C) <2003> iOS-Software
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */
#include "v3d.h"

void
v3d_to_v2d (v3d * v3, int nbvertex, int width, int height, float distance,
    v2d * v2)
{
  int i;

  for (i = 0; i < nbvertex; ++i) {
    if (v3[i].z > 2) {
      int Xp, Yp;

      F2I ((distance * v3[i].x / v3[i].z), Xp);
      F2I ((distance * v3[i].y / v3[i].z), Yp);
      v2[i].x = Xp + (width >> 1);
      v2[i].y = -Yp + (height >> 1);
    } else
      v2[i].x = v2[i].y = -666;
  }
}