Ejemplos de _closestPointOnLine en C++ (Cpp)

Ejemplo n.º 1

Archivo: philipshue_color.c Proyecto: patdie421/mea-edomus

int16_t xyForGamutID(point_t *xy, int16_t gamutID, point_t *xy_r)
{
   point_t triangle[3];
  
   _triangleForGamutID(gamutID, triangle);

   if(_isPointInTriangle(xy, triangle)) {
      memcpy(xy_r,xy,sizeof(point_t));
      return 0;
   }
   
   point_t pAB, pAC, pBC;
   _closestPointOnLine(&triangle[RED],   &triangle[GREEN], xy, &pAB);
   _closestPointOnLine(&triangle[BLUE],  &triangle[RED],   xy, &pAC);
   _closestPointOnLine(&triangle[GREEN], &triangle[BLUE],  xy, &pBC);

   float dAB = _distance(xy, &pAB);
   float dAC = _distance(xy, &pAC);
   float dBC = _distance(xy, &pBC);
   
   float lowest = dAB;
   point_t *closestPoint = &pAB;
   
   if(dAC < lowest)
   {
      lowest = dAC;
      closestPoint = &pAC;
   }
   if(dBC < lowest)
   {
//      lowest = dBC;
      closestPoint = &pBC;
   }
  
   xy_r->x = closestPoint->x;
   xy_r->y = closestPoint->y;
   
   return 0;
}

Ejemplo n.º 2

KRVector3 KRTriangle3::closestPointOnTriangle(const KRVector3 &p) const
{
    KRVector3 a = m_c[0];
    KRVector3 b = m_c[1];
    KRVector3 c = m_c[2];
    
    KRVector3 Rab = _closestPointOnLine(a, b, p);
    KRVector3 Rbc = _closestPointOnLine(b, c, p);
    KRVector3 Rca = _closestPointOnLine(c, a, p);
    
    // return closest [Rab, Rbc, Rca] to p;
    float sd_Rab = (p - Rab).sqrMagnitude();
    float sd_Rbc = (p - Rbc).sqrMagnitude();
    float sd_Rca = (p - Rca).sqrMagnitude();
    
    if(sd_Rab < sd_Rbc && sd_Rab < sd_Rca) {
        return Rab;
    } else if(sd_Rbc < sd_Rab && sd_Rbc < sd_Rca) {
        return Rbc;
    } else {
        return Rca;
    }
}