/usr/include/tachyon/triangle.h is in libtachyon-dev 0.99~b2+dfsg-0.3.
This file is owned by root:root, with mode 0o644.
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* triangle.h - This file contains the defines for triangles etc.
*
* $Id: triangle.h,v 1.21 2011/02/05 08:10:11 johns Exp $
*/
object * newtri(void *, vector, vector, vector);
object * newstri(void *, vector, vector, vector, vector, vector, vector);
void stri_normal_fixup(object *, int mode);
object * newvcstri(void *, vector, vector, vector, vector, vector, vector,
color, color, color);
void vcstri_normal_fixup(object *, int mode);
color vcstri_color(const vector * hit, const texture * tex, const ray * incident);
#ifdef TRIANGLE_PRIVATE
#define TRIXMAJOR 0
#define TRIYMAJOR 1
#define TRIZMAJOR 2
typedef struct {
RT_OBJECT_HEAD
vector edge2; /**< edge vector between v0 and v2 */
vector edge1; /**< edge vector between v0 and v1 */
vector v0; /**< triangle vertex v0 */
} tri;
typedef struct {
RT_OBJECT_HEAD
vector edge2; /**< edge vector between v0 and v2 */
vector edge1; /**< edge vector between v0 and v1 */
vector v0; /**< triangle vertex v0 */
vector n0; /**< surface normal for v0 */
vector n1; /**< surface normal for v1 */
vector n2; /**< surface normal for v2 */
} stri;
typedef struct {
RT_OBJECT_HEAD
vector edge2; /**< edge vector between v0 and v2 */
vector edge1; /**< edge vector between v0 and v1 */
vector v0; /**< triangle vertex v0 */
vector n0; /**< surface normal for v0 */
vector n1; /**< surface normal for v1 */
vector n2; /**< surface normal for v2 */
color c0; /**< surface color for v0 */
color c1; /**< surface color for v1 */
color c2; /**< surface color for v2 */
} vcstri;
static int tri_bbox(void * obj, vector * min, vector * max);
static void tri_intersect(const tri *, ray *);
static void tri_normal(const tri *, const vector *, const ray *, vector *);
static void stri_normal(const stri *, const vector *, const ray *, vector *);
static void stri_normal_reverse(const stri *, const vector *, const ray *, vector *);
static void stri_normal_guess(const stri *, const vector *, const ray *, vector *);
#endif
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