gstreamer/subprojects/gst-plugins-good/gst/goom/v3d.c

38 lines
1.2 KiB
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;
}
}