1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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2 | /* |
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3 | * Copyright (c) 2004-2013 HUBzero Foundation, LLC |
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4 | * |
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5 | */ |
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6 | #include <GL/glew.h> |
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7 | |
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8 | #include <Image.h> |
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9 | #include <ImageLoaderFactory.h> |
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10 | #include <ImageLoader.h> |
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11 | #include <util/FilePath.h> |
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12 | |
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13 | #include "PointSetRenderer.h" |
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14 | #include "PCASplit.h" |
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15 | |
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16 | using namespace nv::util; |
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17 | |
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18 | #define USE_TEXTURE |
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19 | //#define USE_SHADER |
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20 | #define POINT_SIZE 5 |
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21 | |
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22 | PointSetRenderer::PointSetRenderer() |
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23 | { |
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24 | _shader = new PointShader(); |
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25 | std::string path = FilePath::getInstance()->getPath("particle2.bmp"); |
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26 | if (path.empty()) { |
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27 | ERROR("Particle image not found"); |
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28 | return; |
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29 | } |
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30 | |
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31 | ImageLoader *loader = ImageLoaderFactory::getInstance()->createLoader("bmp"); |
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32 | Image *image = loader->load(path.c_str(), Image::IMG_RGBA); |
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33 | unsigned char *bytes = (unsigned char *)image->getImageBuffer(); |
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34 | if (bytes) { |
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35 | for (unsigned int y = 0; y < image->getHeight(); ++y) { |
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36 | for (unsigned int x = 0; x < image->getWidth(); ++x, bytes += 4) { |
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37 | bytes[3] = (bytes[0] == 0) ? 0 : 255; |
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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 | if (image) { |
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43 | _pointTexture = new Texture2D(image->getWidth(), image->getHeight(), |
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44 | GL_UNSIGNED_BYTE, GL_LINEAR, |
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45 | 4, image->getImageBuffer()); |
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46 | } else { |
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47 | ERROR("Failed to load particle image"); |
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48 | } |
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49 | |
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50 | delete loader; |
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51 | delete image; |
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52 | _bucketSort = new PCA::BucketSort(1024); |
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53 | } |
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54 | |
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55 | PointSetRenderer::~PointSetRenderer() |
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56 | { |
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57 | } |
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58 | |
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59 | void PointSetRenderer::renderPoints(PCA::Point *points, int length) |
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60 | { |
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61 | PCA::Point *p = points; |
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62 | for (int i = 0; i < length; ++i, ++p) { |
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63 | glColor4f(p->color.x, p->color.y, p->color.z, p->color.w); |
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64 | glVertex3f(p->position.x, p->position.y, p->position.z); |
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65 | } |
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66 | } |
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67 | |
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68 | void PointSetRenderer::renderCluster(PCA::ClusterList** bucket, int size, int level) |
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69 | { |
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70 | float quadratic[] = { 1.0f, 0.0f, 0.01f }; |
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71 | |
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72 | glEnable(GL_POINT_SPRITE_ARB); |
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73 | glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, quadratic); |
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74 | glPointParameterfARB(GL_POINT_FADE_THRESHOLD_SIZE_ARB, 60.0f); |
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75 | glPointParameterfARB(GL_POINT_SIZE_MIN_ARB, 1.0f); |
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76 | glPointParameterfARB(GL_POINT_SIZE_MAX_ARB, 100); |
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77 | #ifdef USE_TEXTURE |
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78 | glTexEnvf(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE); |
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79 | #endif |
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80 | |
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81 | bool setSize = false; |
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82 | glBegin(GL_POINTS); |
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83 | |
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84 | PCA::ClusterList *p; |
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85 | for (int i = size - 1; i >= 0; --i) { |
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86 | p = bucket[i]; |
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87 | if (p) { |
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88 | if (!setSize) { |
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89 | #ifdef USE_SHADER |
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90 | _shader->setScale(p->data->points[0].size); |
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91 | #endif |
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92 | setSize = true; |
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93 | } |
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94 | } |
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95 | |
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96 | while (p) { |
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97 | renderPoints(p->data->points, p->data->numOfPoints); |
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98 | |
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99 | p = p->next; |
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100 | } |
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101 | } |
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102 | |
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103 | glEnd(); |
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104 | |
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105 | glDisable(GL_POINT_SPRITE_ARB); |
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106 | glPointSize(1); |
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107 | } |
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108 | |
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109 | void PointSetRenderer::render(PCA::ClusterAccel *cluster, const Matrix4x4d& mat, |
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110 | int sortLevel, const Vector3f& scale, const Vector3f& origin) |
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111 | { |
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112 | _bucketSort->init(); |
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113 | _bucketSort->sort(cluster, mat, sortLevel); |
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114 | |
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115 | glDisable(GL_TEXTURE_2D); |
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116 | |
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117 | #ifdef USE_TEXTURE |
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118 | _pointTexture->activate(); |
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119 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
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120 | #endif |
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121 | |
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122 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
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123 | //glBlendFunc(GL_SRC_ALPHA, GL_ONE); |
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124 | glEnable(GL_BLEND); |
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125 | |
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126 | glDisable(GL_LIGHTING); |
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127 | glEnable(GL_COLOR_MATERIAL); |
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128 | |
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129 | glEnable(GL_VERTEX_PROGRAM_POINT_SIZE); |
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130 | glPushMatrix(); |
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131 | float s = 1.0f / scale.x; |
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132 | Vector3 shift(origin.x + scale.x * 0.5, origin.x + scale.x * 0.5, origin.x + scale.x * 0.5); |
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133 | glScalef(s, scale.y / scale.x * s, scale.z / scale.x * s); |
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134 | |
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135 | //glTranslatef(-shift.x, -shift.y, -shift.z); |
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136 | |
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137 | #ifdef USE_SHADER |
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138 | _shader->bind(); |
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139 | #else |
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140 | glPointSize(POINT_SIZE); |
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141 | #endif |
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142 | renderCluster(_bucketSort->getBucket(), _bucketSort->getSize(), 4); |
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143 | #ifdef USE_SHADER |
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144 | _shader->unbind(); |
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145 | #else |
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146 | glPointSize(1.0f); |
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147 | #endif |
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148 | |
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149 | glPopMatrix(); |
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150 | |
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151 | glDisable(GL_COLOR_MATERIAL); |
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152 | glEnable(GL_LIGHTING); |
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153 | glDisable(GL_VERTEX_PROGRAM_POINT_SIZE); |
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154 | glDisable(GL_BLEND); |
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155 | |
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156 | #ifdef USE_TEXTURE |
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157 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); |
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158 | _pointTexture->deactivate(); |
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159 | #endif |
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160 | } |
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