/usr/include/geomview/surf.h is in libgeomview-dev 1.9.4-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | /* Copyright (C) 1992-1998 The Geometry Center
* Copyright (C) 1998-2000 Stuart Levy, Tamara Munzner, Mark Phillips
*
* This file is part of Geomview.
*
* Geomview is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* Geomview 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Geomview; see the file COPYING. If not, write
* to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
* USA, or visit http://www.gnu.org.
*/
/* Authors: Charlie Gunn, Stuart Levy, Tamara Munzner, Mark Phillips */
#include "material.h"
#include "3d.h"
/***********************************************************************
* a surf is a primitive bit of surface, conveys the geometrical
* information about an intersection
***********************************************************************/
#define SURF_NEEDS_SET(p, n, s) ((n)&(p) && !((s)&(p)))
#define SURF_SET(p, f) ((f) |= (p))
#define SURF_NONE 0x0
#define SURF_P 0x1
#define SURF_N 0x2
#define SURF_NG 0x4
#define SURF_DPDU 0x8
#define SURF_DPDV 0x10
#define SURF_UV 0x20
#define SURF_DUDV 0x40
#define SURF_ST 0x80
#define SURF_I 0x100
#define SURF_CS 0x200
#define SURF_OS 0x400
typedef struct surf {
int flag ; /* copied mostly from Renderman */
Point3 P ; /* location of the point */
Point3 dPdu ; /* derivatives */
Point3 dPdv ;
Point3 N ; /* shading normal vector */
Point3 Ng ; /* geometric normal */
Point2 uv ; /* location on the surface */
Point2 dudv ; /* derivatives of u, v */
Point2 st ; /* texture coordinates */
Point3 I ; /* incident ray direction */
Material mat;
Transform3 T;
Geom *geom;
} Surf ;
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