1 /*=========================================================================
2
3 Program: Visualization Toolkit
4 Module: vtkOptiXLightNode.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 "vtkOptiXLightNode.h"
16
17 #include "vtkCollectionIterator.h"
18 #include "vtkLight.h"
19 #include "vtkMath.h"
20 #include "vtkObjectFactory.h"
21 #include "vtkOptiXRendererNode.h"
22
23 #include <optixu/optixpp_namespace.h>
24 #include <CUDA/Light.h>
25
26 #include <vector>
27
28 //============================================================================
29 double vtkOptiXLightNode::LightScale = 1.0;
30
31 //------------------------------------------------------------------------------
32 vtkStandardNewMacro(vtkOptiXLightNode);
33
34 //------------------------------------------------------------------------------
vtkOptiXLightNode()35 vtkOptiXLightNode::vtkOptiXLightNode()
36 {
37 }
38
39 //------------------------------------------------------------------------------
~vtkOptiXLightNode()40 vtkOptiXLightNode::~vtkOptiXLightNode()
41 {
42 }
43
44 //------------------------------------------------------------------------------
SetLightScale(double s)45 void vtkOptiXLightNode::SetLightScale(double s)
46 {
47 vtkOptiXLightNode::LightScale = s;
48 }
49
50 //------------------------------------------------------------------------------
GetLightScale()51 double vtkOptiXLightNode::GetLightScale()
52 {
53 return vtkOptiXLightNode::LightScale;
54 }
55
56 //------------------------------------------------------------------------------
PrintSelf(ostream & os,vtkIndent indent)57 void vtkOptiXLightNode::PrintSelf(ostream& os, vtkIndent indent)
58 {
59 this->Superclass::PrintSelf(os, indent);
60 }
61
62 //------------------------------------------------------------------------------
Render(bool prepass)63 void vtkOptiXLightNode::Render(bool prepass)
64 {
65 if (prepass)
66 {
67 vtkOptiXRendererNode *orn =
68 static_cast<vtkOptiXRendererNode *>(
69 this->GetFirstAncestorOfType("vtkOptiXRendererNode"));
70
71 vtkLight *vlight = vtkLight::SafeDownCast(this->GetRenderable());
72
73 if( vlight->GetSwitch() == 0 ||
74 vtkOptiXLightNode::LightScale <= 0.0f ||
75 vlight->GetIntensity() <= 0.0 )
76 {
77 // Ignoring light
78 return;
79 }
80
81 const optix::float3 color = optix::make_float3(
82 static_cast<float>( vlight->GetDiffuseColor()[0] ),
83 static_cast<float>( vlight->GetDiffuseColor()[1] ),
84 static_cast<float>( vlight->GetDiffuseColor()[2] )
85 );
86
87 const float intensity = static_cast<float>(
88 vtkOptiXLightNode::LightScale *
89 vlight->GetIntensity()
90 );
91
92 vtkopt::Light light;
93 light.color = color*intensity;
94 light.pos = optix::make_float3( 0.0f );
95 light.dir = optix::make_float3( 0.0f );
96
97 if (vlight->GetPositional())
98 {
99 double px, py, pz;
100 vlight->GetTransformedPosition(px, py, pz);
101
102 light.type = vtkopt::Light::POSITIONAL;
103 light.pos = optix::make_float3(
104 static_cast<float>(px),
105 static_cast<float>(py),
106 static_cast<float>(pz)
107 );
108 }
109 else
110 {
111 double px, py, pz;
112 vlight->GetTransformedPosition(px, py, pz);
113
114 double fx, fy, fz;
115 vlight->GetTransformedFocalPoint(fx, fy, fz);
116
117 light.type = vtkopt::Light::DIRECTIONAL;
118 light.dir = optix::make_float3(
119 static_cast<float>( fx - px ),
120 static_cast<float>( fy - py ),
121 static_cast<float>( fz - pz )
122 );
123 light.dir = optix::normalize( light.dir );
124 }
125 orn->AddLight( light );
126 }
127 }
128