1 | #include <GL/glew.h>
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2 | #ifdef _WIN32 |
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3 | #include <windows.h>
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4 | #endif |
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5 | #include <GL/gl.h>
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6 | #include "VelocityArrowsSlice.h"
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7 | #ifdef WIN32
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8 | #include <GL/glaux.h>
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9 | #else
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10 | //#include <opencv/cv.h>
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11 | //#include <opencv/highgui.h>
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12 | #endif
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13 | |
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14 | #ifdef USE_NANOVIS_LIB |
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15 | #include "global.h" |
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16 | #include "Nv.h" |
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17 | #include "R2/R2FilePath.h" |
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18 | #endif |
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19 | |
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20 | #define USE_VERTEX_BUFFER
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21 |
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22 | VelocityArrowsSlice::VelocityArrowsSlice()
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23 | {
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24 | _enabled = false; |
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25 | _context = cgCreateContext();
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26 | _vectorFieldGraphicsID = 0;
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27 | _vfXscale = _vfYscale = _vfZscale = 0;
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28 | _slicePos = 0.5f;
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29 | _vertexBufferGraphicsID = 0;
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30 | axis(2);
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31 | //_renderMode = GLYPHES;
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32 | _renderMode = LINES;
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33 |
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34 | _tickCountForMinSizeAxis = 10;
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35 |
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36 | _queryVelocityFP = |
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37 | #ifdef USE_NANOVIS_LIB |
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38 | LoadCgSourceProgram(_context, "queryvelocity.cg", CG_PROFILE_FP30, "main"); |
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39 | #else |
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40 | cgCreateProgramFromFile(_context, CG_SOURCE, "queryvelocity.cg",
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41 | CG_PROFILE_FP30, "main", NULL);
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42 | cgGLLoadProgram(_queryVelocityFP);
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43 | #endif |
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44 | _qvVectorFieldParam = cgGetNamedParameter(_queryVelocityFP, "vfield");
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45 |
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46 | _dirty = true;
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47 | _dirtySamplingPosition = true;
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48 | _dirtyRenderTarget = true;
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49 | _maxVelocityScale.x = _maxVelocityScale.y = _maxVelocityScale.z = 1.0f;
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50 |
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51 | _renderTargetWidth = 128;
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52 | _renderTargetHeight = 128;
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53 | _velocities = new Vector3[_renderTargetWidth * _renderTargetHeight];
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54 |
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55 | ::glGenBuffers(1, &_vertexBufferGraphicsID);
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56 | glBindBufferARB(GL_ARRAY_BUFFER_ARB, _vertexBufferGraphicsID);
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57 | glBufferDataARB(GL_ARRAY_BUFFER, _renderTargetWidth * _renderTargetHeight * 3 * sizeof(float),
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58 | 0, GL_DYNAMIC_DRAW_ARB);
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59 | glBindBufferARB(GL_ARRAY_BUFFER, 0);
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60 | createRenderTarget();
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61 | _pointCount = 0;
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62 |
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63 | /* |
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64 | _particleVP =
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65 | #ifdef USE_NANOVIS_LIB |
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66 | LoadCgSourceProgram(_context, "velocityslicevp.cg", CG_PROFILE_VP40, "vpmain"); |
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67 | #else |
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68 | cgCreateProgramFromFile(_context, CG_SOURCE, "velocityslicevp.cg",
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69 | CG_PROFILE_VP40, "vpmain", NULL);
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70 | cgGLLoadProgram(_particleVP);
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71 | #endif |
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72 | _mvpParticleParam = cgGetNamedParameter(_particleVP, "mvp");
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73 | _mvParticleParam = cgGetNamedParameter(_particleVP, "modelview");
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74 | _mvTanHalfFOVParam = cgGetNamedParameter(_particleVP, "tanHalfFOV");
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75 |
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76 | // TBD..
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77 | //_particleFP =
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78 | #ifdef USE_NANOVIS_LIB |
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79 | // LoadCgSourceProgram(_context, "velocityslicefp.cg", CG_PROFILE_FP40, "fpmain"); |
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80 | #else |
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81 | cgCreateProgramFromFile(_context, CG_SOURCE, "velocityslicefp.cg",
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82 | CG_PROFILE_FP40, "fpmain", NULL);
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83 | cgGLLoadProgram(_particleFP);
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84 | #endif |
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85 | _vectorParticleParam = cgGetNamedParameter(_particleVP, "vfield");
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86 | */ |
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87 |
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88 | #ifdef USE_NANOVIS_LIB |
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89 | |
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90 | #ifdef WIN32
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91 | AUX_RGBImageRec *pTextureImage = auxDIBImageLoad("arrows.bmp");
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92 | _arrowsTex->setPixels(CF_RGB, DT_UBYTE, pTextureImage->sizeX, pTextureImage->sizeY, (void*) pTextureImage->data);
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93 |
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94 | _arrowsTex = new Texture2D(pTextureImage->sizeX, pTextureImage->sizeY, GL_FLOAT, GL_LINEAR, 3, (void*) pTextureImage->data);
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95 | |
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96 | //delete pTextureImage;
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97 | #else
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98 | /* |
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99 | printf("test1\n"); |
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100 | const char *path = R2FilePath::getInstance()->getPath("arrows_flip2.png"); |
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101 | if (path) printf("test2 %s\n", path); |
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102 | else printf("tt\n"); |
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103 | IplImage* pTextureImage = cvLoadImage(path); |
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104 | printf("test3\n"); |
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105 | if (pTextureImage) |
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106 | { |
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107 | printf("file(%s) has been loaded\n", path); |
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108 | _arrowsTex = new Texture2D(pTextureImage->width, pTextureImage->height, GL_FLOAT, GL_LINEAR, 3, (float*) pTextureImage->imageData);
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109 | printf("file(%s) has been loaded\n", path); |
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110 | //cvReleaseImage(&pTextureImage);
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111 | } |
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112 | else |
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113 | { |
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114 | printf("not found\n"); |
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115 | } |
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116 | if (path) delete [] path; |
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117 | */ |
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118 |
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119 | #endif
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120 | |
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121 | #else |
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122 | _arrowsTex = new Texture2D();
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123 | _arrowsTex->setWrapS(TW_MIRROR);
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124 | _arrowsTex->setWrapT(TW_MIRROR);
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125 | #ifdef WIN32
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126 | AUX_RGBImageRec *pTextureImage = auxDIBImageLoad("arrows.bmp");
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127 | _arrowsTex->setPixels(CF_RGB, DT_UBYTE, pTextureImage->sizeX, pTextureImage->sizeY, (void*) pTextureImage->data);
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128 |
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129 | //delete pTextureImage;
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130 | #else
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131 | IplImage* pTextureImage = cvLoadImage("arrows_flip2.png");
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132 | _arrowsTex->setPixels(CF_RGB, DT_UBYTE, pTextureImage->width, pTextureImage->height, (void*) pTextureImage->imageData);
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133 |
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134 | //cvReleaseImage(&pTextureImage);
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135 | #endif
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136 | |
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137 | #endif |
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138 | _arrowColor.set(1, 1, 0); |
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139 | |
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140 | printf("test1\n"); |
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141 | }
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142 |
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143 | VelocityArrowsSlice::~VelocityArrowsSlice()
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144 | {
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145 | cgDestroyProgram(_queryVelocityFP); |
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146 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _fbo); |
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147 | glDeleteTextures(1, &_tex); |
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148 | glDeleteFramebuffersEXT(1, &_fbo); |
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149 | |
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150 | #ifdef USE_NANOVIS_LIB |
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151 | delete _arrowsTex; |
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152 | #else |
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153 | _arrowsTex->unref();
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154 | #endif |
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155 | cgDestroyProgram(_particleFP);
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156 | cgDestroyProgram(_particleVP);
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157 |
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158 | glDeleteBuffers(1, &_vertexBufferGraphicsID); |
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159 | delete [] _velocities;
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160 | }
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161 |
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162 | void VelocityArrowsSlice::createRenderTarget()
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163 | {
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164 | glGenFramebuffersEXT(1, &_fbo);
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165 | glGenTextures(1, &_tex);
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166 |
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167 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _fbo);
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168 |
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169 | glViewport(0, 0, _renderTargetWidth, _renderTargetHeight);
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170 | glMatrixMode(GL_PROJECTION);
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171 | glLoadIdentity();
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172 | glOrtho(0, _renderTargetWidth, 0, _renderTargetHeight, -10.0f, 10.0f);
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173 | glMatrixMode(GL_MODELVIEW);
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174 | glLoadIdentity();
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175 |
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176 | glBindTexture(GL_TEXTURE_RECTANGLE_NV, _tex);
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177 | glTexParameterf(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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178 | glTexParameterf(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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179 | glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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180 | glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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181 |
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182 | glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0, GL_FLOAT_RGBA32_NV,
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183 | _renderTargetWidth, _renderTargetHeight, 0, GL_RGBA, GL_FLOAT, NULL);
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184 |
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185 |
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186 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
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187 | GL_TEXTURE_RECTANGLE_NV, _tex, 0);
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188 |
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189 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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190 | }
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191 |
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192 | void VelocityArrowsSlice::axis(int axis)
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193 | {
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194 | _axis = axis;
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195 | switch (_axis)
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196 | {
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197 | case 0 :
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198 | _projectionVector.x = 0;
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199 | _projectionVector.y = 1;
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200 | _projectionVector.z = 1;
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201 | break;
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202 | case 1 :
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203 | _projectionVector.x = 1;
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204 | _projectionVector.y = 0;
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205 | _projectionVector.z = 1;
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206 | break;
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207 | case 2 :
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208 | _projectionVector.x = 1;
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209 | _projectionVector.y = 1;
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210 | _projectionVector.z = 0;
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211 | break;
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212 | }
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213 | _dirtySamplingPosition = true;
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214 | _dirtyRenderTarget = true;
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215 | //_dirty = true; |
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216 | }
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217 |
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218 |
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219 | void VelocityArrowsSlice::queryVelocity()
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220 | {
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221 | if (!_enabled) return;
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222 |
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223 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _fbo);
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224 | glDisable(GL_DEPTH_TEST);
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225 | cgGLBindProgram(_queryVelocityFP);
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226 | cgGLEnableProfile(CG_PROFILE_FP30);
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227 | cgGLSetTextureParameter(_qvVectorFieldParam, _vectorFieldGraphicsID);
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228 | cgGLEnableTextureParameter(_qvVectorFieldParam);
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229 |
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230 | glPushAttrib(GL_VIEWPORT_BIT);
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231 | glViewport(0, 0, _renderTargetWidth, _renderTargetHeight);
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232 | glMatrixMode(GL_PROJECTION);
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233 | glPushMatrix();
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234 | glLoadIdentity();
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235 | glOrtho(0, _renderTargetWidth, 0, _renderTargetHeight, -10.0f, 10.0f);
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236 | glMatrixMode(GL_MODELVIEW);
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237 | glPushMatrix();
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238 | glLoadIdentity();
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239 | glBegin(GL_POINTS);
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240 |
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241 | for (unsigned int index = 0; index < _samplingPositions.size(); ++index)
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242 | {
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243 | glMultiTexCoord3f(0, _samplingPositions[index].x,_samplingPositions[index].y,_samplingPositions[index].z);
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244 | glVertex2f(index % _renderTargetWidth,
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245 | index / _renderTargetHeight);
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246 | }
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247 |
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248 | glEnd();
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249 |
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250 | glDisable(GL_TEXTURE_RECTANGLE_NV);
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251 | cgGLDisableTextureParameter(_qvVectorFieldParam);
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252 | cgGLDisableProfile(CG_PROFILE_FP30);
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253 |
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254 | glReadPixels(0, 0, _renderTargetWidth, _renderTargetHeight, GL_RGB, GL_FLOAT, _velocities);
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255 |
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256 | glMatrixMode(GL_PROJECTION);
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257 | glPopMatrix();
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258 | glMatrixMode(GL_MODELVIEW);
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259 | glPopMatrix();
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260 | glPopAttrib();
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261 |
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262 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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263 | }
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264 |
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265 | void VelocityArrowsSlice::render()
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266 | {
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267 | //if (!_enabled || (_vectorFieldGraphicsID == 0)) return;
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268 | if (!_enabled) return; |
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269 | |
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270 | if (_dirty)
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271 | {
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272 | computeSamplingTicks();
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273 | queryVelocity();
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274 | _dirty = false;
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275 | }
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276 |
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277 |
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278 | glPushMatrix();
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279 |
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280 | glScalef(_vfXscale,_vfYscale, _vfZscale);
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281 | glTranslatef(-0.5f, -0.5f, -0.5f);
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282 | if (_renderMode == LINES)
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283 | {
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284 |
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285 | glDisable(GL_TEXTURE_2D);
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286 | glLineWidth(2.0);
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287 | glColor3f(_arrowColor.x, _arrowColor.y, _arrowColor.z);
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288 | glBegin(GL_LINES);
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289 | Vector3 pos;
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290 | Vector3 pos2;
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291 | Vector3 vel(1, 0, 0);
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292 | Vector3 v, v2;
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293 | if (_axis == 2)
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294 | {
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295 | int index = 0;
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296 | for (int y = 1; y <= _tickCountY; ++y)
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297 | for (int x = 1; x <= _tickCountX; ++x, ++index)
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298 | {
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299 | pos = this->_samplingPositions[index];
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300 | pos2 = this->_velocities[index].scale(_projectionVector).scale(_maxVelocityScale) + pos;
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301 | glVertex3f(pos.x, pos.y, pos.z);
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302 | glVertex3f(pos2.x, pos2.y, pos2.z);
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303 | /*v = pos - pos2;
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304 |
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305 |
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306 | v2.x = 1;
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307 | v2.y = 1;
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308 | v2.z = (-(x1-x2)-(y1-y2))/(z1-z2)
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309 | adj = v.length() / (4 * sqrt((x3^2)+(y3^2)+(z3^2)));
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310 | x3 *= adj
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311 | y3 *= adj
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312 | z3 *= adj
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313 | */
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314 |
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315 | }
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316 | }
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317 | else if (_axis == 1)
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318 | {
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319 | int index = 0;
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320 | for (int z = 1; z <= _tickCountZ; ++z)
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321 | for (int x = 1; x <= _tickCountX; ++x, ++index)
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322 | {
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323 | pos = _samplingPositions[index];
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324 | pos2 = this->_velocities[index].scale(_projectionVector).scale(_maxVelocityScale) + pos;
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325 |
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326 | glVertex3f(pos.x, pos.y, pos.z);
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327 | glVertex3f(pos2.x, pos2.y, pos2.z);
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328 | }
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329 | }
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330 | else if (_axis == 0)
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331 | {
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332 | int index = 0;
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333 | for (int z = 1; z <= _tickCountZ; ++z)
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334 | for (int y = 1; y <= _tickCountY; ++y, ++index)
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335 | {
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336 | pos = _samplingPositions[index];
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337 | pos2 = this->_velocities[index].scale(_projectionVector).scale(_maxVelocityScale) + pos;
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338 |
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339 | glVertex3f(pos.x, pos.y, pos.z);
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340 | glVertex3f(pos2.x, pos2.y, pos2.z);
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341 | }
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342 | }
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343 |
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344 | glEnd();
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345 | glLineWidth(1.0);
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346 | }
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347 | else
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348 | {
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349 | glColor3f(_arrowColor.x, _arrowColor.y, _arrowColor.z);
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350 | glEnable(GL_BLEND);
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351 | glBlendFunc(GL_SRC_ALPHA, GL_ONE);
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352 | glEnable(GL_POINT_SPRITE_NV);
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353 | glPointSize(20);
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354 | glEnable(GL_VERTEX_PROGRAM_POINT_SIZE_NV);
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355 |
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356 | #ifdef USE_NANOVIS_LIB |
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357 | _arrowsTex->activate(); |
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358 | #else |
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359 | _arrowsTex->bind(0);
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360 | glEnable(GL_TEXTURE_2D);
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361 | #endif |
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362 | glPointParameterfARB( GL_POINT_FADE_THRESHOLD_SIZE_ARB, 0.0f );
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363 |
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364 | glPointParameterfARB( GL_POINT_SIZE_MIN_ARB, 1.0f);
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365 | glPointParameterfARB( GL_POINT_SIZE_MAX_ARB, 100.0f);
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366 | glTexEnvf( GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE );
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367 |
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368 | cgGLBindProgram(_particleVP);
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369 | cgGLBindProgram(_particleFP);
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370 | cgGLEnableProfile(CG_PROFILE_VP40);
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371 | cgGLEnableProfile(CG_PROFILE_FP40);
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372 | |
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373 | cgGLSetTextureParameter(_vectorParticleParam, _vectorFieldGraphicsID);
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374 | cgGLEnableTextureParameter(_vectorParticleParam);
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375 |
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376 |
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377 | //cgSetParameter1f(_mvTanHalfFOVParam, -tan(_fov * 0.5) * _screenHeight * 0.5);
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378 |
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379 | cgGLSetStateMatrixParameter(_mvpParticleParam,
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380 | CG_GL_MODELVIEW_PROJECTION_MATRIX,
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381 | CG_GL_MATRIX_IDENTITY);
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382 | cgGLSetStateMatrixParameter(_mvParticleParam,
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383 | CG_GL_MODELVIEW_MATRIX,
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384 | CG_GL_MATRIX_IDENTITY);
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385 |
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386 | glEnableClientState(GL_VERTEX_ARRAY);
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387 | glBindBufferARB(GL_ARRAY_BUFFER_ARB, _vertexBufferGraphicsID);
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388 | glVertexPointer(3, GL_FLOAT, 0, 0);
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389 | //glEnableClientState(GL_COLOR_ARRAY);
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390 |
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391 | // TBD..
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392 | glDrawArrays(GL_POINTS, 0, _pointCount);
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393 | glPointSize(1);
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394 | glDrawArrays(GL_POINTS, 0, _pointCount);
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395 |
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396 | glDisableClientState(GL_VERTEX_ARRAY);
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397 |
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398 | cgGLDisableProfile(CG_PROFILE_VP40);
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399 | cgGLDisableProfile(CG_PROFILE_FP40);
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400 |
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401 | glDepthMask(GL_TRUE);
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402 |
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403 | glDisable(GL_POINT_SPRITE_NV);
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404 | glDisable(GL_VERTEX_PROGRAM_POINT_SIZE_NV);
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405 |
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406 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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407 | glDisable(GL_BLEND);
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408 | #ifdef USE_NANOVIS_LIB |
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409 | _arrowsTex->deactivate(); |
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410 | #else |
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411 | _arrowsTex->unbind(); |
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412 | #endif |
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413 | }
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414 | glPopMatrix();
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415 | }
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416 |
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417 | void VelocityArrowsSlice::enabled(bool e)
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418 | {
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419 | _enabled = e;
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420 | }
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421 |
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422 | void VelocityArrowsSlice::vectorField(unsigned int vfGraphicsID,
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423 | float xScale, float yScale, float zScale)
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424 | {
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425 | _vectorFieldGraphicsID = vfGraphicsID;
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426 | _vfXscale = xScale;
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427 | _vfYscale = yScale;
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428 | _vfZscale = zScale;
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429 | |
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430 | //_dirty = true; |
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431 | }
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432 |
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433 | void VelocityArrowsSlice::tickCountForMinSizeAxis(int tickCount)
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434 | {
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435 | _tickCountForMinSizeAxis = tickCount;
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436 |
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437 | //_dirty = true; |
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438 | }
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439 |
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440 |
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441 | void VelocityArrowsSlice::computeSamplingTicks()
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442 | {
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443 | if (_vfXscale < _vfYscale)
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444 | {
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445 | if (_vfXscale < _vfZscale)
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446 | {
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447 | // vfXscale
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448 | _tickCountX = _tickCountForMinSizeAxis;
|
---|
449 |
|
---|
450 | float step = _vfXscale / (_tickCountX + 1);
|
---|
451 |
|
---|
452 | _tickCountY = (int) (_vfYscale/step);
|
---|
453 | _tickCountZ = (int) (_vfZscale/step);
|
---|
454 | //vscalex = 1; |
---|
455 | //vscaley = _vfXscale / _vfXscale; |
---|
456 | //vscalez = _vfZscale / _vfXscale; |
---|
457 | }
|
---|
458 | else
|
---|
459 | {
|
---|
460 | // vfZscale
|
---|
461 | _tickCountZ = _tickCountForMinSizeAxis;
|
---|
462 |
|
---|
463 | float step = _vfZscale / (_tickCountZ + 1);
|
---|
464 | _tickCountX = (int) (_vfXscale/step);
|
---|
465 | _tickCountY = (int) (_vfYscale/step);
|
---|
466 | //vscalex = _vfXscale / _vfZscale; |
---|
467 | //vscaley = _vfYscale / _vfZscale; |
---|
468 | //vscalez = 1; |
---|
469 | }
|
---|
470 |
|
---|
471 | }
|
---|
472 | else
|
---|
473 | {
|
---|
474 | if (_vfYscale < _vfZscale)
|
---|
475 | {
|
---|
476 | // _vfYscale
|
---|
477 | _tickCountY = _tickCountForMinSizeAxis;
|
---|
478 |
|
---|
479 | float step = _vfYscale / (_tickCountY + 1);
|
---|
480 | _tickCountX = (int) (_vfXscale/step);
|
---|
481 | _tickCountZ = (int) (_vfZscale/step);
|
---|
482 | |
---|
483 | //vscalex = _vfXscale / _vfYscale; |
---|
484 | //vscaley = 1; |
---|
485 | //vscalez = _vfZscale / _vfYscale; |
---|
486 | }
|
---|
487 | else
|
---|
488 | {
|
---|
489 | // vfZscale
|
---|
490 | _tickCountZ = _tickCountForMinSizeAxis;
|
---|
491 |
|
---|
492 | float step = _vfZscale / (_tickCountZ + 1);
|
---|
493 | _tickCountX = (int) (_vfXscale/step);
|
---|
494 | _tickCountY = (int) (_vfYscale/step);
|
---|
495 | |
---|
496 | //vscalex = _vfXscale / _vfZscale; |
---|
497 | //vscaley = _vfYscale / _vfZscale; |
---|
498 | //vscalez = 1; |
---|
499 |
|
---|
500 |
|
---|
501 | }
|
---|
502 | }
|
---|
503 |
|
---|
504 | _maxVelocityScale.x = 1.0f / _tickCountX * 0.8f; |
---|
505 | _maxVelocityScale.y = 1.0f / _tickCountY * 0.8f; |
---|
506 | _maxVelocityScale.z = 1.0f / _tickCountZ * 0.8f; |
---|
507 |
|
---|
508 | int pointCount = _tickCountX * _tickCountY * _tickCountZ;
|
---|
509 | if (_pointCount != pointCount)
|
---|
510 | {
|
---|
511 | _samplingPositions.clear();
|
---|
512 | _samplingPositions.reserve(pointCount);
|
---|
513 | _pointCount = pointCount;
|
---|
514 | }
|
---|
515 |
|
---|
516 | if (_renderMode == LINES)
|
---|
517 | {
|
---|
518 | Vector3 pos;
|
---|
519 | if (_axis == 2)
|
---|
520 | {
|
---|
521 | for (int y = 1; y <= _tickCountY; ++y)
|
---|
522 | for (int x = 1; x <= _tickCountX; ++x)
|
---|
523 | {
|
---|
524 | pos.x = (1.0f / (_tickCountX + 1)) * x;
|
---|
525 | pos.y = (1.0f / (_tickCountY + 1)) * y;
|
---|
526 | pos.z = _slicePos;
|
---|
527 | _samplingPositions.push_back(pos);
|
---|
528 |
|
---|
529 | }
|
---|
530 | }
|
---|
531 | else if (_axis == 1)
|
---|
532 | {
|
---|
533 | for (int z = 1; z <= _tickCountZ; ++z)
|
---|
534 | for (int x = 1; x <= _tickCountX; ++x)
|
---|
535 | {
|
---|
536 | pos.x = (1.0f / (_tickCountX + 1)) * x;
|
---|
537 | pos.y = _slicePos;
|
---|
538 | pos.z = (1.0f / (_tickCountZ + 1)) * z;
|
---|
539 | _samplingPositions.push_back(pos);
|
---|
540 | }
|
---|
541 | }
|
---|
542 | else if (_axis == 0)
|
---|
543 | {
|
---|
544 | for (int z = 1; z <= _tickCountZ; ++z)
|
---|
545 | for (int y = 1; y <= _tickCountY; ++y)
|
---|
546 | {
|
---|
547 | pos.x = _slicePos;
|
---|
548 | pos.y = (1.0f / (_tickCountY + 1)) * y;
|
---|
549 | pos.z = (1.0f / (_tickCountZ + 1)) * z;
|
---|
550 | _samplingPositions.push_back(pos);
|
---|
551 | }
|
---|
552 | }
|
---|
553 | }
|
---|
554 | else
|
---|
555 | {
|
---|
556 | glBindBufferARB(GL_ARRAY_BUFFER_ARB, _vertexBufferGraphicsID);
|
---|
557 | Vector3* pinfo = (Vector3*) glMapBufferARB(GL_ARRAY_BUFFER, GL_WRITE_ONLY_ARB);
|
---|
558 |
|
---|
559 | Vector3 pos;
|
---|
560 | if (_axis == 2)
|
---|
561 | {
|
---|
562 | for (int y = 1; y <= _tickCountY; ++y)
|
---|
563 | for (int x = 1; x <= _tickCountX; ++x)
|
---|
564 | {
|
---|
565 | pos.x = (1.0f / (_tickCountX + 1)) * x;
|
---|
566 | pos.y = (1.0f / (_tickCountY + 1)) * y;
|
---|
567 | pos.z = _slicePos;
|
---|
568 |
|
---|
569 | *pinfo = pos;
|
---|
570 | ++pinfo;
|
---|
571 | }
|
---|
572 | }
|
---|
573 | else if (_axis == 1)
|
---|
574 | {
|
---|
575 | for (int z = 1; z <= _tickCountZ; ++z)
|
---|
576 | for (int x = 1; x <= _tickCountX; ++x)
|
---|
577 | {
|
---|
578 | pos.x = (1.0f / (_tickCountX + 1)) * x;
|
---|
579 | pos.y = _slicePos;
|
---|
580 | pos.z = (1.0f / (_tickCountZ + 1)) * z;
|
---|
581 |
|
---|
582 | *pinfo = pos;
|
---|
583 | ++pinfo;
|
---|
584 | }
|
---|
585 | }
|
---|
586 | else if (_axis == 0)
|
---|
587 | {
|
---|
588 | for (int z = 1; z <= _tickCountZ; ++z)
|
---|
589 | for (int y = 1; y <= _tickCountY; ++y)
|
---|
590 | {
|
---|
591 | pos.x = _slicePos;
|
---|
592 | pos.y = (1.0f / (_tickCountY + 1)) * y;
|
---|
593 | pos.z = (1.0f / (_tickCountZ + 1)) * z;
|
---|
594 |
|
---|
595 | *pinfo = pos;
|
---|
596 | ++pinfo;
|
---|
597 | }
|
---|
598 | }
|
---|
599 |
|
---|
600 | glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
|
---|
601 | }
|
---|
602 | } |
---|
603 | |
---|
604 | void VelocityArrowsSlice::slicePos(float pos) |
---|
605 | { |
---|
606 | _slicePos = pos; |
---|
607 | _dirty = true; |
---|
608 | } |
---|
609 | |
---|