path: root/hw5/src/scale3d.cpp

/******************************************************************/
/* This file is part of the homework assignments for CSCI-427/527 */
/* at The College of William & Mary and authored by Pieter Peers. */
/* No part of this file, whether altered or in original form, can */
/* be distributed or used outside the context of CSCI-427/527     */
/* without consent of either the College of William & Mary or     */
/* Pieter Peers.                                                  */
/******************************************************************/
#include "scale3d.h"

//////////////////
// Constructors //
//////////////////
scale3d::scale3d(void) : transformation3d()
{
  // Do Nothing
}


scale3d::scale3d(float uniformScale) : transformation3d()
{
  // HW5: implement a scale with the factors for the X, Y, and Z axis being
  //      the same for all, namely: uniformScale
  // Modifies: _transformation, _inverseTransformation, _translation
  // Returns: nothing.
  scale3d(uniformScale, uniformScale, uniformScale);
}


scale3d::scale3d(float scaleX, float scaleY, float scaleZ) : transformation3d()
{
  // HW5: implement a scale with the factors for the X, Y, and Z axis being:
  //      scaleX, scaleY, and scaleZ respectively.
  // Modifies: _transformation, _inverseTransformation, _translation
  // Returns: nothing.
  _transformation(0, 0) *= scaleX;
  _transformation(1, 1) *= scaleY;
  _transformation(2, 2) *= scaleZ;
  _inverseTransformation(0, 0) /= scaleX;
  _inverseTransformation(1, 1) /= scaleY;
  _inverseTransformation(2, 2) /= scaleZ;
}

scale3d::scale3d(const scale3d& s) : transformation3d(s)
{
  // Do Nothing
}