hw6/src/scale3d.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

/******************************************************************/
/* 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()
{
  _transformation.setDiagonal(uniformScale);
  _inverseTransformation.setDiagonal(1.0f / uniformScale);
}


scale3d::scale3d(float scaleX, float scaleY, float scaleZ) : transformation3d()
{
  _transformation(0,0) = scaleX;
  _transformation(1,1) = scaleY;
  _transformation(2,2) = scaleZ;

  _inverseTransformation(0,0) = 1.0f / scaleX;
  _inverseTransformation(1,1) = 1.0f / scaleY;
  _inverseTransformation(2,2) = 1.0f / scaleZ;
}

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