C++ (Cpp) CG_CapTrace Examples

Example #1

File: cg_buildable.c Project: ppetr/new-edge

/*
===============
CG_PositionAndOrientateBuildable
===============
*/
static void CG_PositionAndOrientateBuildable( const vec3_t angles, const vec3_t inOrigin,
                                              const vec3_t normal, const int skipNumber,
                                              const vec3_t mins, const vec3_t maxs,
                                              vec3_t outAxis[ 3 ], vec3_t outOrigin )
{
  vec3_t  forward, start, end;
  trace_t tr, box_tr;
  float mag, fraction;

  AngleVectors( angles, forward, NULL, NULL );
  VectorCopy( normal, outAxis[ 2 ] );
  ProjectPointOnPlane( outAxis[ 0 ], forward, outAxis[ 2 ] );

  if( !VectorNormalize( outAxis[ 0 ] ) )
  {
    AngleVectors( angles, NULL, NULL, forward );
    ProjectPointOnPlane( outAxis[ 0 ], forward, outAxis[ 2 ] );
    VectorNormalize( outAxis[ 0 ] );
  }

  CrossProduct( outAxis[ 0 ], outAxis[ 2 ], outAxis[ 1 ] );
  outAxis[ 1 ][ 0 ] = -outAxis[ 1 ][ 0 ];
  outAxis[ 1 ][ 1 ] = -outAxis[ 1 ][ 1 ];
  outAxis[ 1 ][ 2 ] = -outAxis[ 1 ][ 2 ];

  VectorMA( inOrigin, -TRACE_DEPTH, normal, end );
  VectorMA( inOrigin, 1.0f, normal, start );

  // Take both capsule and box traces. If the capsule trace does not differ
  //  significantly from the box trace use it. This may cause buildables to be
  //  positioned *inside* the surface on which it is placed. This is intentional

  CG_CapTrace( &tr, start, mins, maxs, end, skipNumber,
               MASK_PLAYERSOLID );

  CG_Trace( &box_tr, start, mins, maxs, end, skipNumber,
            MASK_PLAYERSOLID );

  mag = Distance( tr.endpos, box_tr.endpos );

  fraction = tr.fraction;

  // this is either too far off of the bbox to be useful for gameplay purposes
  //  or the model is positioned in thin air anyways.
  if( mag > 15.0f || tr.fraction == 1.0f )
    fraction = box_tr.fraction; 

  VectorMA( inOrigin, fraction * -TRACE_DEPTH, normal, outOrigin );
}

Example #2

File: cg_buildable.c Project: DolceTriade/segfault

/*
===============
CG_PositionAndOrientateBuildable
===============
*/
static void CG_PositionAndOrientateBuildable( const vec3_t angles, const vec3_t inOrigin,
                                              const vec3_t normal, const int skipNumber,
                                              const vec3_t mins, const vec3_t maxs,
                                              vec3_t outAxis[ 3 ], vec3_t outOrigin )
{
  vec3_t  forward, start, end;
  trace_t tr;

  AngleVectors( angles, forward, NULL, NULL );
  VectorCopy( normal, outAxis[ 2 ] );
  ProjectPointOnPlane( outAxis[ 0 ], forward, outAxis[ 2 ] );

  if( !VectorNormalize( outAxis[ 0 ] ) )
  {
    AngleVectors( angles, NULL, NULL, forward );
    ProjectPointOnPlane( outAxis[ 0 ], forward, outAxis[ 2 ] );
    VectorNormalize( outAxis[ 0 ] );
  }

  CrossProduct( outAxis[ 0 ], outAxis[ 2 ], outAxis[ 1 ] );
  outAxis[ 1 ][ 0 ] = -outAxis[ 1 ][ 0 ];
  outAxis[ 1 ][ 1 ] = -outAxis[ 1 ][ 1 ];
  outAxis[ 1 ][ 2 ] = -outAxis[ 1 ][ 2 ];

  VectorMA( inOrigin, -TRACE_DEPTH, normal, end );
  VectorMA( inOrigin, 1.0f, normal, start );
  CG_CapTrace( &tr, start, mins, maxs, end, skipNumber,
               CONTENTS_SOLID | CONTENTS_PLAYERCLIP );

  if( tr.fraction == 1.0f )
  {
    //erm we missed completely - try again with a box trace
    CG_Trace( &tr, start, mins, maxs, end, skipNumber,
              CONTENTS_SOLID | CONTENTS_PLAYERCLIP );
  }

  VectorMA( inOrigin, tr.fraction * -TRACE_DEPTH, normal, outOrigin );
}