source: trunk/gui/vizservers/nanovis/Plane.cpp @ 226

Last change on this file since 226 was 226, checked in by mmc, 15 years ago
  • Added code for Wei's visualization server.
  • Fixed the energyLevels widget so that it doesn't barf when the user attempts to download its contents.
File size: 2.0 KB
Line 
1/*
2 * ----------------------------------------------------------------------
3 * Plane.cpp: plane class
4 *
5 * ======================================================================
6 *  AUTHOR:  Wei Qiao <qiaow@purdue.edu>
7 *           Purdue Rendering and Perceptualization Lab (PURPL)
8 *
9 *  Copyright (c) 2004-2006  Purdue Research Foundation
10 *
11 *  See the file "license.terms" for information on usage and
12 *  redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
13 * ======================================================================
14 */
15#include <assert.h>
16#include "Plane.h"
17
18Plane::Plane(){}
19
20Plane::Plane(float _a, float _b, float _c, float _d) {
21    this->a = _a;
22    this->b = _b;
23    this->c = _c;
24    this->d = _d;
25
26    assert(a != 0 || b != 0 || c != 0);
27}
28
29Plane::Plane(float coeffs[4]) {
30    a = coeffs[0];
31    b = coeffs[1];
32    c = coeffs[2];
33    d = coeffs[3];
34
35    assert(a != 0 || b != 0 || c != 0);
36}
37
38void Plane::get_normal(Vector3 &normal){
39    normal.x = a;
40    normal.y = b;
41    normal.z = c;
42}
43
44void Plane::get_point(Vector3 &point){
45    if(a != 0){
46                point.x = -d/a;
47                point.y = 0;
48                point.z = 0;
49    }
50        else if(b != 0){
51                point.y = -d/b;
52                point.x = 0;
53                point.z = 0;
54    }
55        else if(c != 0){
56                point.z = -d /c;
57                point.y = 0;
58                point.x = 0;
59    }
60        else{
61                assert(false);
62    }
63}
64
65Vector4 Plane::get_coeffs(){
66    Vector4 ret(a, b, c, d);
67        return ret;
68}
69
70void Plane::set_coeffs(float _a, float _b, float _c, float _d){
71    a = _a;
72    b = _b;
73    c = _c;
74    d = _d;
75}
76
77void Plane::transform(Mat4x4 mat) {
78    Vector4 coeffs(a, b, c, d);
79        Mat4x4 inv = mat.inverse();
80        Vector4 new_coeffs = inv.multiply_row_vector(coeffs);
81
82    a = new_coeffs.x;
83    b = new_coeffs.y;
84    c = new_coeffs.z;
85    d = new_coeffs.w;
86}
87
88void Plane::transform(float *m){
89        Mat4x4 mat(m);
90        transform(mat);
91}
92
93bool Plane::retains(Vector3 point){
94    return (a * point.x + b * point.y + c * point.z + d >= 0);
95}
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