1 /*=========================================================================
2
3 Program: Visualization Toolkit
4 Module: vtkAbstractMapper3D.cxx
5
6 Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7 All rights reserved.
8 See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9
10 This software is distributed WITHOUT ANY WARRANTY; without even
11 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12 PURPOSE. See the above copyright notice for more information.
13
14 =========================================================================*/
15 #include "vtkAbstractMapper3D.h"
16 #include "vtkDataSet.h"
17 #include "vtkMath.h"
18 #include "vtkMatrix4x4.h"
19 #include "vtkPlaneCollection.h"
20
21
22 // Construct with initial range (0,1).
vtkAbstractMapper3D()23 vtkAbstractMapper3D::vtkAbstractMapper3D()
24 {
25 vtkMath::UninitializeBounds(this->Bounds);
26 this->Center[0] = this->Center[1] = this->Center[2] = 0.0;
27 }
28
29 // Get the bounds for this Prop as (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
GetBounds(double bounds[6])30 void vtkAbstractMapper3D::GetBounds(double bounds[6])
31 {
32 this->GetBounds();
33 for (int i=0; i<6; i++)
34 {
35 bounds[i] = this->Bounds[i];
36 }
37 }
38
GetCenter()39 double *vtkAbstractMapper3D::GetCenter()
40 {
41 this->GetBounds();
42 for (int i=0; i<3; i++)
43 {
44 this->Center[i] = (this->Bounds[2*i+1] + this->Bounds[2*i]) / 2.0;
45 }
46 return this->Center;
47 }
48
GetLength()49 double vtkAbstractMapper3D::GetLength()
50 {
51 double diff, l=0.0;
52 int i;
53
54 this->GetBounds();
55 for (i=0; i<3; i++)
56 {
57 diff = this->Bounds[2*i+1] - this->Bounds[2*i];
58 l += diff * diff;
59 }
60
61 return sqrt(l);
62 }
63
GetClippingPlaneInDataCoords(vtkMatrix4x4 * propMatrix,int i,double hnormal[4])64 void vtkAbstractMapper3D::GetClippingPlaneInDataCoords(
65 vtkMatrix4x4 *propMatrix, int i, double hnormal[4])
66 {
67 vtkPlaneCollection *clipPlanes = this->ClippingPlanes;
68 const double *mat = *propMatrix->Element;
69
70 if (clipPlanes)
71 {
72 int n = clipPlanes->GetNumberOfItems();
73 if (i >= 0 && i < n)
74 {
75 // Get the plane
76 vtkPlane *plane = clipPlanes->GetItem(i);
77 double *normal = plane->GetNormal();
78 double *origin = plane->GetOrigin();
79
80 // Compute the plane equation
81 double v1 = normal[0];
82 double v2 = normal[1];
83 double v3 = normal[2];
84 double v4 = -(v1*origin[0] + v2*origin[1] + v3*origin[2]);
85
86 // Transform normal from world to data coords
87 hnormal[0] = v1*mat[0] + v2*mat[4] + v3*mat[8] + v4*mat[12];
88 hnormal[1] = v1*mat[1] + v2*mat[5] + v3*mat[9] + v4*mat[13];
89 hnormal[2] = v1*mat[2] + v2*mat[6] + v3*mat[10] + v4*mat[14];
90 hnormal[3] = v1*mat[3] + v2*mat[7] + v3*mat[11] + v4*mat[15];
91
92 return;
93 }
94 }
95
96 vtkErrorMacro("Clipping plane index " << i << " is out of range.");
97 }
98
PrintSelf(ostream & os,vtkIndent indent)99 void vtkAbstractMapper3D::PrintSelf(ostream& os, vtkIndent indent)
100 {
101 this->Superclass::PrintSelf(os,indent);
102 }
103