src/utility.cpp File Reference

#include "utility.h"
#include "textures.h"
#include <fstream>
#include <sys/types.h>
#include <dirent.h>

Include dependency graph for utility.cpp:

Go to the source code of this file.

Defines

#define GL_GLEXT_PROTOTYPES
#define CROSS(dest, v1, v2)
#define DOT(v1, v2)   (v1[0]*v2[0]+v1[1]*v2[1]+v1[2]*v2[2])
#define SUB(dest, v1, v2)   dest[0]=v1[0]-v2[0]; dest[1]=v1[1]-v2[1]; dest[2]=v1[2]-v2[2];
#define ADD(dest, v1, v2)   dest[0]=v1[0]+v2[0]; dest[1]=v1[1]+v2[1]; dest[2]=v1[2]+v2[2];
#define MULT(dest, v, factor)   dest[0]=factor*v[0]; dest[1]=factor*v[1]; dest[2]=factor*v[2];
#define SET(dest, src)   dest[0]=src[0]; dest[1]=src[1]; dest[2]=src[2];
#define SORT(a, b)
#define SORT2(a, b, smallest)
#define ISECT(VV0, VV1, VV2, D0, D1, D2, isect0, isect1)
#define COMPUTE_INTERVALS(VV0, VV1, VV2, D0, D1, D2, D0D1, D0D2, isect0, isect1)
#define EDGE_EDGE_TEST(V0, U0, U1)
#define EDGE_AGAINST_TRI_EDGES(V0, V1, U0, U1, U2)
#define POINT_IN_TRI(V0, U0, U1, U2)
#define NEWCOMPUTE_INTERVALS(VV0, VV1, VV2, D0, D1, D2, D0D1, D0D2, A, B, C, X0, X1)
#define FABS(x)   ((float)fabs(x))

Functions

void isect2 (float VTX0[3], float VTX1[3], float VTX2[3], float VV0, float VV1, float VV2, float D0, float D1, float D2, float *isect0, float *isect1, float isectpoint0[3], float isectpoint1[3])
int coplanar_tri_tri (float N[3], float V0[3], float V1[3], float V2[3], float U0[3], float U1[3], float U2[3])
int compute_intervals_isectline (float VERT0[3], float VERT1[3], float VERT2[3], float VV0, float VV1, float VV2, float D0, float D1, float D2, float D0D1, float D0D2, float *isect0, float *isect1, float isectpoint0[3], float isectpoint1[3])
int NoDivTriTriIsect (float V0[3], float V1[3], float V2[3], float U0[3], float U1[3], float U2[3])
VERTEX NormalFromTri (VERTEX *tri)
float PointToTriDistance (VERTEX norm, float d, VERTEX point)

Variables

const float DEG2RAD = 3.14159 / 180.0
bool verbose_output

Define Documentation

#define ADD (  dest,
v1,
v2   )     dest[0]=v1[0]+v2[0]; dest[1]=v1[1]+v2[1]; dest[2]=v1[2]+v2[2];
 

Definition at line 1286 of file utility.cpp.

Referenced by isect2().

#define COMPUTE_INTERVALS (  VV0,
VV1,
VV2,
D0,
D1,
D2,
D0D1,
D0D2,
isect0,
isect1   ) 
 

Value:

if(D0D1>0.0f)                                         \
  {                                                     \
    /* here we know that D0D2<=0.0 */                   \
    /* that is D0, D1 are on the same side, D2 on the other or on the plane */ \
    ISECT(VV2,VV0,VV1,D2,D0,D1,isect0,isect1);          \
  }                                                     \
  else if(D0D2>0.0f)                                    \
  {                                                     \
    /* here we know that d0d1<=0.0 */                   \
    ISECT(VV1,VV0,VV2,D1,D0,D2,isect0,isect1);          \
  }                                                     \
  else if(D1*D2>0.0f || D0!=0.0f)                       \
  {                                                     \
    /* here we know that d0d1<=0.0 or that D0!=0.0 */   \
    ISECT(VV0,VV1,VV2,D0,D1,D2,isect0,isect1);          \
  }                                                     \
  else if(D1!=0.0f)                                     \
  {                                                     \
    ISECT(VV1,VV0,VV2,D1,D0,D2,isect0,isect1);          \
  }                                                     \
  else if(D2!=0.0f)                                     \
  {                                                     \
    ISECT(VV2,VV0,VV1,D2,D0,D1,isect0,isect1);          \
  }                                                     \
  else                                                  \
  {                                                     \
    /* triangles are coplanar */                        \
    return coplanar_tri_tri(N1,V0,V1,V2,U0,U1,U2);      \
  }

Definition at line 1319 of file utility.cpp.

#define CROSS (  dest,
v1,
v2   ) 
 

Value:

dest[0]=v1[1]*v2[2]-v1[2]*v2[1]; \
              dest[1]=v1[2]*v2[0]-v1[0]*v2[2]; \
              dest[2]=v1[0]*v2[1]-v1[1]*v2[0];

Definition at line 1277 of file utility.cpp.

Referenced by UTILITY::IntersectTriangleD(), UTILITY::IntersectTriangleF(), UTILITY::MollerTriTriIsectWithLine(), and NoDivTriTriIsect().

#define DOT (  v1,
v2   )     (v1[0]*v2[0]+v1[1]*v2[1]+v1[2]*v2[2])
 

Definition at line 1282 of file utility.cpp.

Referenced by UTILITY::IntersectTriangleD(), UTILITY::IntersectTriangleF(), UTILITY::MollerTriTriIsectWithLine(), and NoDivTriTriIsect().

#define EDGE_AGAINST_TRI_EDGES (  V0,
V1,
U0,
U1,
U2   ) 
 

Value:

{                                              \
  float Ax,Ay,Bx,By,Cx,Cy,e,d,f;               \
  Ax=V1[i0]-V0[i0];                            \
  Ay=V1[i1]-V0[i1];                            \
  /* test edge U0,U1 against V0,V1 */          \
  EDGE_EDGE_TEST(V0,U0,U1);                    \
  /* test edge U1,U2 against V0,V1 */          \
  EDGE_EDGE_TEST(V0,U1,U2);                    \
  /* test edge U2,U1 against V0,V1 */          \
  EDGE_EDGE_TEST(V0,U2,U0);                    \
}

Definition at line 1373 of file utility.cpp.

Referenced by coplanar_tri_tri().

#define EDGE_EDGE_TEST (  V0,
U0,
U1   ) 
 

Value:

Bx=U0[i0]-U1[i0];                                   \
  By=U0[i1]-U1[i1];                                   \
  Cx=V0[i0]-U0[i0];                                   \
  Cy=V0[i1]-U0[i1];                                   \
  f=Ay*Bx-Ax*By;                                      \
  d=By*Cx-Bx*Cy;                                      \
  if((f>0 && d>=0 && d<=f) || (f<0 && d<=0 && d>=f))  \
  {                                                   \
    e=Ax*Cy-Ay*Cx;                                    \
    if(f>0)                                           \
    {                                                 \
      if(e>=0 && e<=f) return 1;                      \
    }                                                 \
    else                                              \
    {                                                 \
      if(e<=0 && e>=f) return 1;                      \
    }                                                 \
  }

Definition at line 1353 of file utility.cpp.

#define FABS (  x   )     ((float)fabs(x))
 

Definition at line 1685 of file utility.cpp.

Referenced by NoDivTriTriIsect().

#define GL_GLEXT_PROTOTYPES
 

Definition at line 26 of file utility.cpp.

#define ISECT (  VV0,
VV1,
VV2,
D0,
D1,
D2,
isect0,
isect1   ) 
 

Value:

isect0=VV0+(VV1-VV0)*D0/(D0-D1);    \
              isect1=VV0+(VV2-VV0)*D0/(D0-D2);

Definition at line 1314 of file utility.cpp.

#define MULT (  dest,
v,
factor   )     dest[0]=factor*v[0]; dest[1]=factor*v[1]; dest[2]=factor*v[2];
 

Definition at line 1288 of file utility.cpp.

Referenced by isect2().

#define NEWCOMPUTE_INTERVALS (  VV0,
VV1,
VV2,
D0,
D1,
D2,
D0D1,
D0D2,
A,
B,
C,
X0,
X1   ) 
 

Definition at line 1652 of file utility.cpp.

Referenced by NoDivTriTriIsect().

#define POINT_IN_TRI (  V0,
U0,
U1,
U2   ) 
 

Value:

{                                           \
  float a,b,c,d0,d1,d2;                     \
  /* is T1 completly inside T2? */          \
  /* check if V0 is inside tri(U0,U1,U2) */ \
  a=U1[i1]-U0[i1];                          \
  b=-(U1[i0]-U0[i0]);                       \
  c=-a*U0[i0]-b*U0[i1];                     \
  d0=a*V0[i0]+b*V0[i1]+c;                   \
                                            \
  a=U2[i1]-U1[i1];                          \
  b=-(U2[i0]-U1[i0]);                       \
  c=-a*U1[i0]-b*U1[i1];                     \
  d1=a*V0[i0]+b*V0[i1]+c;                   \
                                            \
  a=U0[i1]-U2[i1];                          \
  b=-(U0[i0]-U2[i0]);                       \
  c=-a*U2[i0]-b*U2[i1];                     \
  d2=a*V0[i0]+b*V0[i1]+c;                   \
  if(d0*d1>0.0)                             \
  {                                         \
    if(d0*d2>0.0) return 1;                 \
  }                                         \
}

Definition at line 1386 of file utility.cpp.

Referenced by coplanar_tri_tri().

#define SET (  dest,
src   )     dest[0]=src[0]; dest[1]=src[1]; dest[2]=src[2];
 

Definition at line 1290 of file utility.cpp.

Referenced by UTILITY::MollerTriTriIsectWithLine().

#define SORT (  a,
b   ) 
 

Value:

if(a>b)    \
             {          \
               float c; \
               c=a;     \
               a=b;     \
               b=c;     \
             }

Definition at line 1293 of file utility.cpp.

Referenced by NoDivTriTriIsect().

#define SORT2 (  a,
b,
smallest   ) 
 

Value:

if(a>b)       \
             {             \
               float c;    \
               c=a;        \
               a=b;        \
               b=c;        \
               smallest=1; \
             }             \
             else smallest=0;

Definition at line 1303 of file utility.cpp.

Referenced by UTILITY::MollerTriTriIsectWithLine().

#define SUB (  dest,
v1,
v2   )     dest[0]=v1[0]-v2[0]; dest[1]=v1[1]-v2[1]; dest[2]=v1[2]-v2[2];
 

Definition at line 1284 of file utility.cpp.

Referenced by UTILITY::IntersectTriangleD(), UTILITY::IntersectTriangleF(), isect2(), UTILITY::MollerTriTriIsectWithLine(), and NoDivTriTriIsect().

Function Documentation

int compute_intervals_isectline (  float  VERT0[3],
float  VERT1[3],
float  VERT2[3],
float  VV0,
float  VV1,
float  VV2,
float  D0,
float  D1,
float  D2,
float  D0D1,
float  D0D2,
float *  isect0,
float *  isect1,
float  isectpoint0[3],
float  isectpoint1[3]
)  [inline]
 

Definition at line 1476 of file utility.cpp.

References isect2().

Referenced by UTILITY::MollerTriTriIsectWithLine().

int coplanar_tri_tri (  float  N[3],
float  V0[3],
float  V1[3],
float  V2[3],
float  U0[3],
float  U1[3],
float  U2[3]
) 
 

Definition at line 1427 of file utility.cpp.

References EDGE_AGAINST_TRI_EDGES, and POINT_IN_TRI.

Referenced by UTILITY::MollerTriTriIsectWithLine().

void isect2 (  float  VTX0[3],
float  VTX1[3],
float  VTX2[3],
float  VV0,
float  VV1,
float  VV2,
float  D0,
float  D1,
float  D2,
float *  isect0,
float *  isect1,
float  isectpoint0[3],
float  isectpoint1[3]
)  [inline]
 

Definition at line 1411 of file utility.cpp.

References ADD, MULT, and SUB.

Referenced by compute_intervals_isectline(), UTILITY::MollerTriTriIsectWithLine(), and NoDivTriTriIsect().

int NoDivTriTriIsect (  float  V0[3],
float  V1[3],
float  V2[3],
float  U0[3],
float  U1[3],
float  U2[3]
) 
 

Definition at line 1687 of file utility.cpp.

References CROSS, DOT, EPSILON, FABS, isect2(), NEWCOMPUTE_INTERVALS, SORT, and SUB.

Referenced by UTILITY::BruteForceTriangleIntersectionF(), and UTILITY::BruteForceTriangleIntersectionF2().

VERTEX NormalFromTri (  VERTEX *  tri  ) 
 

Definition at line 1854 of file utility.cpp.

References VERTEX::normalize().

Referenced by UTILITY::BruteForceTriangleIntersectionF2().

float PointToTriDistance (  VERTEX  norm,
float  d,
VERTEX  point
) 
 

Definition at line 1863 of file utility.cpp.

References VERTEX::x, VERTEX::y, and VERTEX::z.

Variable Documentation

const float DEG2RAD = 3.14159 / 180.0
 

Definition at line 54 of file utility.cpp.

Referenced by UTILITY::DrawEllipse().

bool verbose_output
 

Definition at line 115 of file main.cpp.

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