1 | /*
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2 | * ----------------------------------------------------------------------
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3 | * Volume.h: 3d volume class
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4 | *
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5 | * ======================================================================
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6 | * AUTHOR: Wei Qiao <qiaow@purdue.edu>
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7 | * Purdue Rendering and Perceptualization Lab (PURPL)
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8 | *
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9 | * Copyright (c) 2004-2006 Purdue Research Foundation
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10 | *
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11 | * See the file "license.terms" for information on usage and
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12 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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13 | * ======================================================================
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14 | */
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15 |
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16 | #ifndef _VOLUME_H_
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17 | #define _VOLUME_H_
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18 |
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19 | #include <string>
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20 | #include <vector>
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21 |
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22 | #include "define.h"
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23 | #include "Color.h"
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24 | #include "Texture3D.h"
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25 | #include "Vector3.h"
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26 |
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27 | using namespace std;
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28 |
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29 | struct CutPlane{
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30 | int orient; //orientation - 1: xy slice, 2: yz slice, 3: xz slice
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31 | float offset; //normalized offset [0,1] in the volume
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32 | bool enabled;
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33 |
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34 | CutPlane(int _orient, float _offset):
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35 | orient(_orient),
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36 | offset(_offset),
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37 | enabled(true){}
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38 | };
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39 |
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40 |
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41 |
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42 | enum {CUBIC, ZINCBLENDE};
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43 |
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44 |
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45 | class Volume{
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46 |
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47 |
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48 | public:
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49 | int volume_type; //cubic or zincblende
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50 |
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51 | vector <CutPlane> plane; //cut planes
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52 | int n_components;
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53 |
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54 | Texture3D* tex; //OpenGL texture storing the volume
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55 | double vmin; //minimum (unscaled) value in data
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56 | double vmax; //maximum (unscaled) value in data
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57 |
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58 | float specular; //specular lighting parameter
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59 | float diffuse; //diffuse lighting parameter
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60 | float opacity_scale; //The scale multiplied to the opacity assigned by the transfer function.
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61 | //Rule of thumb: higher opacity_scale the object is to appear like plastic
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62 |
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63 | bool data_enabled; // show/hide cloud of volume data
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64 |
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65 | bool outline_enabled; // show/hide outline around volume
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66 | Color outline_color; // color for outline around volume
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67 |
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68 |
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69 |
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70 | Vector3 location;
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71 |
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72 | bool enabled;
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73 | int n_slice; //number of slices when rendered. The greater the better quality, lower speed.
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74 |
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75 | int width; //The resolution of the data (how many points in each direction.
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76 | int height; //It is different from the size of the volume object drawn on screen.
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77 | int depth; //Width, height and depth together determing the proprotion of the volume ONLY.
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78 |
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79 | float size; //This is the scaling factor that will size the volume on screen.
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80 | //A render program drawing different objects, always knows how large an object
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81 | //is in relation to other objects. This size is provided by the render engine.
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82 |
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83 | float aspect_ratio_width;
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84 | float aspect_ratio_height;
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85 | float aspect_ratio_depth;
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86 |
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87 | NVISid id; //OpenGL textue identifier (==tex->id)
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88 |
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89 | Volume(float x, float y, float z,
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90 | int width, int height, int depth, float size,
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91 | int n_component, float* data, double vmin, double vmax);
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92 | ~Volume();
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93 |
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94 | void enable(); //VolumeRenderer will render an enabled volume and its cutplanes
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95 | void disable();
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96 | void move(Vector3 _loc);
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97 | bool is_enabled();
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98 | Vector3* get_location();
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99 |
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100 | double range_min() { return vmin; }
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101 | double range_max() { return vmax; }
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102 |
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103 | void set_n_slice(int val); //set number of slices
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104 | int get_n_slice(); //return number of slices
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105 |
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106 | void set_size(float s); //set the drawing size of volume
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107 |
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108 | //methods related to cutplanes
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109 | int add_cutplane(int _orientation, float _location); //add a plane and returns its index
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110 | void enable_cutplane(int index);
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111 | void disable_cutplane(int index);
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112 | void move_cutplane(int index, float _location);
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113 | CutPlane* get_cutplane(int index);
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114 | int get_cutplane_count(); //returns the number of cutplanes in the volume
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115 | bool cutplane_is_enabled(int index); //check if a cutplane is enabled
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116 |
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117 | //methods related to shading. These parameters are per volume
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118 | float get_specular();
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119 | float get_diffuse();
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120 | float get_opacity_scale();
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121 | void set_specular(float s);
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122 | void set_diffuse(float d);
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123 | void set_opacity_scale(float s);
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124 |
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125 | void enable_data();
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126 | void disable_data();
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127 | bool data_is_enabled();
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128 |
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129 | void enable_outline();
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130 | void disable_outline();
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131 | bool outline_is_enabled();
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132 | void set_outline_color(float* rgb);
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133 | void get_outline_color(float* rgb);
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134 |
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135 |
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136 | void set_label(int axis, char* txt); //change the label displayed on an axis
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137 | std::string label[3]; // the labels along each axis 0:x , 1:y, 2:z
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138 | };
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139 |
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140 | #endif
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