SbPlane.h

#ifndef COIN_SBPLANE_H
#define COIN_SBPLANE_H
 
/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
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 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
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 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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\**************************************************************************/
 
#include <cstdio>
 
class SbLine;
class SbMatrix;
 
template <class Type> class SbVec3;
 
template <class Type>
class SbPlane {
public:
  SbPlane(void) { }
  SbPlane(const SbVec3<Type> & N, const Type D) : normal(N), distance(D) {
    this->normal.normalize();
  }
 
  SbPlane(const SbVec3<Type> & p0, const SbVec3<Type> & p1, const SbVec3<Type> & p2) {
    this->normal = (p1 - p0).cross(p2 - p0);
    assert(this->normal.sqrLength() != 0.0f); // points on line
    this->normal.normalize();
    this->distance = this->normal.dot(p0);
  }
 
  Type getDistance(const SbVec3<Type> & point) const {
    return point.dot(this->normal) - this->distance;
  }
 
  const SbVec3<Type> & getNormal(void) const {
    return this->normal;
  }
 
  void offset(const Type d) {
    this->distance += d;
  }
 
  int isInHalfSpace(const SbVec3<Type> & point) const {
    return this->getDistance(point) >= 0.0f;
  }
 
  Type getDistanceFromOrigin(void) const {
    return this->distance;
  }
 
private:
  SbVec3<Type> normal;
  Type distance;
 
};
 
#endif // !COIN_SBPLANE_H