1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
---|
2 | /* |
---|
3 | * ---------------------------------------------------------------------- |
---|
4 | * Nanovis: Visualization of Nanoelectronics Data |
---|
5 | * |
---|
6 | * ====================================================================== |
---|
7 | * AUTHOR: Wei Qiao <qiaow@purdue.edu> |
---|
8 | * Michael McLennan <mmclennan@purdue.edu> |
---|
9 | * Purdue Rendering and Perceptualization Lab (PURPL) |
---|
10 | * |
---|
11 | * Copyright (c) 2004-2013 HUBzero Foundation, LLC |
---|
12 | * |
---|
13 | * See the file "license.terms" for information on usage and |
---|
14 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
---|
15 | * ====================================================================== |
---|
16 | */ |
---|
17 | |
---|
18 | #include <sys/time.h> |
---|
19 | #include <cassert> |
---|
20 | #include <cstdio> |
---|
21 | #include <cmath> // for fmod() |
---|
22 | |
---|
23 | #include <GL/glew.h> |
---|
24 | #include <GL/glut.h> |
---|
25 | |
---|
26 | #include <graphics/RenderContext.h> |
---|
27 | #include <vrmath/BBox.h> |
---|
28 | #include <vrmath/Vector3f.h> |
---|
29 | |
---|
30 | #include <util/FilePath.h> |
---|
31 | #include <util/Fonts.h> |
---|
32 | |
---|
33 | #include <BMPImageLoaderImpl.h> |
---|
34 | #include <ImageLoaderFactory.h> |
---|
35 | |
---|
36 | #include "config.h" |
---|
37 | #include "nanovis.h" |
---|
38 | #include "nanovisServer.h" |
---|
39 | #include "define.h" |
---|
40 | |
---|
41 | #include "Flow.h" |
---|
42 | #include "Grid.h" |
---|
43 | #include "HeightMap.h" |
---|
44 | #include "Camera.h" |
---|
45 | #include "LIC.h" |
---|
46 | #include "Shader.h" |
---|
47 | #include "OrientationIndicator.h" |
---|
48 | #include "PlaneRenderer.h" |
---|
49 | #include "PPMWriter.h" |
---|
50 | #include "Texture2D.h" |
---|
51 | #include "Trace.h" |
---|
52 | #include "TransferFunction.h" |
---|
53 | #include "Unirect.h" |
---|
54 | #include "VelocityArrowsSlice.h" |
---|
55 | #include "Volume.h" |
---|
56 | #include "VolumeInterpolator.h" |
---|
57 | #include "VolumeRenderer.h" |
---|
58 | |
---|
59 | using namespace nv; |
---|
60 | using namespace nv::graphics; |
---|
61 | using namespace nv::util; |
---|
62 | using namespace vrmath; |
---|
63 | |
---|
64 | // STATIC MEMBER DATA |
---|
65 | |
---|
66 | Tcl_Interp *NanoVis::interp = NULL; |
---|
67 | |
---|
68 | bool NanoVis::redrawPending = false; |
---|
69 | bool NanoVis::debugFlag = false; |
---|
70 | |
---|
71 | int NanoVis::winWidth = NPIX; |
---|
72 | int NanoVis::winHeight = NPIX; |
---|
73 | int NanoVis::renderWindow = 0; |
---|
74 | unsigned char *NanoVis::screenBuffer = NULL; |
---|
75 | Texture2D *NanoVis::legendTexture = NULL; |
---|
76 | Fonts *NanoVis::fonts; |
---|
77 | Camera *NanoVis::_camera = NULL; |
---|
78 | RenderContext *NanoVis::renderContext = NULL; |
---|
79 | |
---|
80 | NanoVis::TransferFunctionHashmap NanoVis::tfTable; |
---|
81 | NanoVis::VolumeHashmap NanoVis::volumeTable; |
---|
82 | NanoVis::FlowHashmap NanoVis::flowTable; |
---|
83 | NanoVis::HeightMapHashmap NanoVis::heightMapTable; |
---|
84 | |
---|
85 | BBox NanoVis::sceneBounds; |
---|
86 | |
---|
87 | VolumeRenderer *NanoVis::volRenderer = NULL; |
---|
88 | VelocityArrowsSlice *NanoVis::velocityArrowsSlice = NULL; |
---|
89 | LIC *NanoVis::licRenderer = NULL; |
---|
90 | PlaneRenderer *NanoVis::planeRenderer = NULL; |
---|
91 | OrientationIndicator *NanoVis::orientationIndicator = NULL; |
---|
92 | Grid *NanoVis::grid = NULL; |
---|
93 | |
---|
94 | //frame buffer for final rendering |
---|
95 | GLuint NanoVis::_finalFbo = 0; |
---|
96 | GLuint NanoVis::_finalColorTex = 0; |
---|
97 | GLuint NanoVis::_finalDepthRb = 0; |
---|
98 | |
---|
99 | void |
---|
100 | NanoVis::removeAllData() |
---|
101 | { |
---|
102 | TRACE("Enter"); |
---|
103 | |
---|
104 | if (grid != NULL) { |
---|
105 | TRACE("Deleting grid"); |
---|
106 | delete grid; |
---|
107 | } |
---|
108 | if (_camera != NULL) { |
---|
109 | TRACE("Deleting camera"); |
---|
110 | delete _camera; |
---|
111 | } |
---|
112 | if (volRenderer != NULL) { |
---|
113 | TRACE("Deleting volRenderer"); |
---|
114 | delete volRenderer; |
---|
115 | } |
---|
116 | if (planeRenderer != NULL) { |
---|
117 | TRACE("Deleting planeRenderer"); |
---|
118 | delete planeRenderer; |
---|
119 | } |
---|
120 | if (legendTexture != NULL) { |
---|
121 | TRACE("Deleting legendTexture"); |
---|
122 | delete legendTexture; |
---|
123 | } |
---|
124 | TRACE("Deleting flows"); |
---|
125 | deleteFlows(interp); |
---|
126 | if (licRenderer != NULL) { |
---|
127 | TRACE("Deleting licRenderer"); |
---|
128 | delete licRenderer; |
---|
129 | } |
---|
130 | if (velocityArrowsSlice != NULL) { |
---|
131 | TRACE("Deleting velocityArrowsSlice"); |
---|
132 | delete velocityArrowsSlice; |
---|
133 | } |
---|
134 | if (renderContext != NULL) { |
---|
135 | TRACE("Deleting renderContext"); |
---|
136 | delete renderContext; |
---|
137 | } |
---|
138 | if (screenBuffer != NULL) { |
---|
139 | TRACE("Deleting screenBuffer"); |
---|
140 | delete [] screenBuffer; |
---|
141 | screenBuffer = NULL; |
---|
142 | } |
---|
143 | if (fonts != NULL) { |
---|
144 | TRACE("Deleting fonts"); |
---|
145 | delete fonts; |
---|
146 | } |
---|
147 | TRACE("Leave"); |
---|
148 | } |
---|
149 | |
---|
150 | void |
---|
151 | NanoVis::eventuallyRedraw() |
---|
152 | { |
---|
153 | if (!redrawPending) { |
---|
154 | glutPostRedisplay(); |
---|
155 | redrawPending = true; |
---|
156 | } |
---|
157 | } |
---|
158 | |
---|
159 | void |
---|
160 | NanoVis::panCamera(float dx, float dy) |
---|
161 | { |
---|
162 | _camera->pan(dx, dy); |
---|
163 | |
---|
164 | collectBounds(); |
---|
165 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
---|
166 | } |
---|
167 | |
---|
168 | void |
---|
169 | NanoVis::zoomCamera(float z) |
---|
170 | { |
---|
171 | _camera->zoom(z); |
---|
172 | |
---|
173 | collectBounds(); |
---|
174 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
---|
175 | } |
---|
176 | |
---|
177 | void |
---|
178 | NanoVis::orientCamera(double *quat) |
---|
179 | { |
---|
180 | _camera->orient(quat); |
---|
181 | |
---|
182 | collectBounds(); |
---|
183 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
---|
184 | } |
---|
185 | |
---|
186 | void |
---|
187 | NanoVis::setCameraPosition(Vector3f pos) |
---|
188 | { |
---|
189 | _camera->setPosition(pos); |
---|
190 | |
---|
191 | collectBounds(); |
---|
192 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
---|
193 | } |
---|
194 | |
---|
195 | void |
---|
196 | NanoVis::setCameraUpdir(Camera::AxisDirection dir) |
---|
197 | { |
---|
198 | _camera->setUpdir(dir); |
---|
199 | |
---|
200 | collectBounds(); |
---|
201 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
---|
202 | } |
---|
203 | |
---|
204 | void |
---|
205 | NanoVis::resetCamera(bool resetOrientation) |
---|
206 | { |
---|
207 | TRACE("Resetting all=%d", resetOrientation ? 1 : 0); |
---|
208 | |
---|
209 | collectBounds(); |
---|
210 | _camera->reset(sceneBounds.min, sceneBounds.max, resetOrientation); |
---|
211 | } |
---|
212 | |
---|
213 | /** \brief Load a 3D volume |
---|
214 | * |
---|
215 | * \param name Volume ID |
---|
216 | * \param width Number of samples in X direction |
---|
217 | * \param height Number of samples in Y direction |
---|
218 | * \param depth Number of samples in Z direction |
---|
219 | * \param numComponents the number of scalars for each space point. All component |
---|
220 | * scalars for a point are placed consequtively in data array |
---|
221 | * width, height and depth: number of points in each dimension |
---|
222 | * \param data Array of floats |
---|
223 | * \param vmin Min value of field |
---|
224 | * \param vmax Max value of field |
---|
225 | * \param nonZeroMin Minimum non-zero value of field |
---|
226 | * \param data pointer to an array of floats. |
---|
227 | */ |
---|
228 | Volume * |
---|
229 | NanoVis::loadVolume(const char *name, int width, int height, int depth, |
---|
230 | int numComponents, float *data, double vmin, double vmax, |
---|
231 | double nonZeroMin) |
---|
232 | { |
---|
233 | VolumeHashmap::iterator itr = volumeTable.find(name); |
---|
234 | if (itr != volumeTable.end()) { |
---|
235 | WARN("volume \"%s\" already exists", name); |
---|
236 | removeVolume(itr->second); |
---|
237 | } |
---|
238 | |
---|
239 | Volume *volume = new Volume(width, height, depth, |
---|
240 | numComponents, |
---|
241 | data, vmin, vmax, nonZeroMin); |
---|
242 | Volume::updatePending = true; |
---|
243 | volume->name(name); |
---|
244 | volumeTable[name] = volume; |
---|
245 | |
---|
246 | return volume; |
---|
247 | } |
---|
248 | |
---|
249 | // Gets a colormap 1D texture by name. |
---|
250 | TransferFunction * |
---|
251 | NanoVis::getTransferFunction(const TransferFunctionId& id) |
---|
252 | { |
---|
253 | TransferFunctionHashmap::iterator itr = tfTable.find(id); |
---|
254 | if (itr == tfTable.end()) { |
---|
255 | TRACE("No transfer function named \"%s\" found", id.c_str()); |
---|
256 | return NULL; |
---|
257 | } else { |
---|
258 | return itr->second; |
---|
259 | } |
---|
260 | } |
---|
261 | |
---|
262 | // Creates of updates a colormap 1D texture by name. |
---|
263 | TransferFunction * |
---|
264 | NanoVis::defineTransferFunction(const TransferFunctionId& id, |
---|
265 | size_t n, float *data) |
---|
266 | { |
---|
267 | TransferFunction *tf = getTransferFunction(id); |
---|
268 | if (tf == NULL) { |
---|
269 | TRACE("Creating new transfer function \"%s\"", id.c_str()); |
---|
270 | tf = new TransferFunction(id.c_str(), n, data); |
---|
271 | tfTable[id] = tf; |
---|
272 | } else { |
---|
273 | TRACE("Updating existing transfer function \"%s\"", id.c_str()); |
---|
274 | tf->update(n, data); |
---|
275 | } |
---|
276 | return tf; |
---|
277 | } |
---|
278 | |
---|
279 | int |
---|
280 | NanoVis::renderLegend(TransferFunction *tf, double min, double max, |
---|
281 | int width, int height, const char *volArg) |
---|
282 | { |
---|
283 | TRACE("Enter"); |
---|
284 | |
---|
285 | int old_width = winWidth; |
---|
286 | int old_height = winHeight; |
---|
287 | |
---|
288 | planeRenderer->setScreenSize(width, height); |
---|
289 | resizeOffscreenBuffer(width, height); |
---|
290 | |
---|
291 | // generate data for the legend |
---|
292 | float data[512]; |
---|
293 | for (int i=0; i < 256; i++) { |
---|
294 | data[i] = data[i+256] = (float)(i/255.0); |
---|
295 | } |
---|
296 | legendTexture = new Texture2D(256, 2, GL_FLOAT, GL_LINEAR, 1, data); |
---|
297 | int index = planeRenderer->addPlane(legendTexture, tf); |
---|
298 | planeRenderer->setActivePlane(index); |
---|
299 | |
---|
300 | bindOffscreenBuffer(); |
---|
301 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //clear screen |
---|
302 | planeRenderer->render(); |
---|
303 | |
---|
304 | glPixelStorei(GL_PACK_ALIGNMENT, 1); |
---|
305 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, screenBuffer); |
---|
306 | { |
---|
307 | char prefix[200]; |
---|
308 | |
---|
309 | TRACE("Sending ppm legend image %s min:%g max:%g", volArg, min, max); |
---|
310 | sprintf(prefix, "nv>legend %s %g %g", volArg, min, max); |
---|
311 | #ifdef USE_THREADS |
---|
312 | queuePPM(g_queue, prefix, screenBuffer, width, height); |
---|
313 | #else |
---|
314 | writePPM(g_fdOut, prefix, screenBuffer, width, height); |
---|
315 | #endif |
---|
316 | } |
---|
317 | planeRenderer->removePlane(index); |
---|
318 | resizeOffscreenBuffer(old_width, old_height); |
---|
319 | |
---|
320 | delete legendTexture; |
---|
321 | legendTexture = NULL; |
---|
322 | TRACE("Leave"); |
---|
323 | return TCL_OK; |
---|
324 | } |
---|
325 | |
---|
326 | //initialize frame buffer objects for offscreen rendering |
---|
327 | bool |
---|
328 | NanoVis::initOffscreenBuffer() |
---|
329 | { |
---|
330 | TRACE("Enter"); |
---|
331 | assert(_finalFbo == 0); |
---|
332 | // Initialize a fbo for final display. |
---|
333 | glGenFramebuffersEXT(1, &_finalFbo); |
---|
334 | |
---|
335 | glGenTextures(1, &_finalColorTex); |
---|
336 | glBindTexture(GL_TEXTURE_2D, _finalColorTex); |
---|
337 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
---|
338 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
---|
339 | #if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT) |
---|
340 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0, |
---|
341 | GL_RGB, GL_INT, NULL); |
---|
342 | #elif defined(HAVE_FLOAT_TEXTURES) |
---|
343 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0, |
---|
344 | GL_RGB, GL_INT, NULL); |
---|
345 | #else |
---|
346 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0, |
---|
347 | GL_RGB, GL_INT, NULL); |
---|
348 | #endif |
---|
349 | |
---|
350 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo); |
---|
351 | glGenRenderbuffersEXT(1, &_finalDepthRb); |
---|
352 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
---|
353 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, |
---|
354 | winWidth, winHeight); |
---|
355 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
---|
356 | GL_TEXTURE_2D, _finalColorTex, 0); |
---|
357 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, |
---|
358 | GL_RENDERBUFFER_EXT, _finalDepthRb); |
---|
359 | |
---|
360 | GLenum status; |
---|
361 | if (!CheckFBO(&status)) { |
---|
362 | PrintFBOStatus(status, "finalFbo"); |
---|
363 | return false; |
---|
364 | } |
---|
365 | |
---|
366 | TRACE("Leave"); |
---|
367 | return true; |
---|
368 | } |
---|
369 | |
---|
370 | //resize the offscreen buffer |
---|
371 | bool |
---|
372 | NanoVis::resizeOffscreenBuffer(int w, int h) |
---|
373 | { |
---|
374 | TRACE("Enter (%d, %d)", w, h); |
---|
375 | if ((w == winWidth) && (h == winHeight)) { |
---|
376 | return true; |
---|
377 | } |
---|
378 | winWidth = w; |
---|
379 | winHeight = h; |
---|
380 | |
---|
381 | if (fonts) { |
---|
382 | fonts->resize(w, h); |
---|
383 | } |
---|
384 | TRACE("screenBuffer size: %d %d", w, h); |
---|
385 | |
---|
386 | if (screenBuffer != NULL) { |
---|
387 | delete [] screenBuffer; |
---|
388 | screenBuffer = NULL; |
---|
389 | } |
---|
390 | |
---|
391 | screenBuffer = new unsigned char[3*winWidth*winHeight]; |
---|
392 | assert(screenBuffer != NULL); |
---|
393 | |
---|
394 | //delete the current render buffer resources |
---|
395 | glDeleteTextures(1, &_finalColorTex); |
---|
396 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
---|
397 | glDeleteRenderbuffersEXT(1, &_finalDepthRb); |
---|
398 | |
---|
399 | TRACE("before deleteframebuffers"); |
---|
400 | glDeleteFramebuffersEXT(1, &_finalFbo); |
---|
401 | |
---|
402 | TRACE("reinitialize FBO"); |
---|
403 | //Reinitialize final fbo for final display |
---|
404 | glGenFramebuffersEXT(1, &_finalFbo); |
---|
405 | |
---|
406 | glGenTextures(1, &_finalColorTex); |
---|
407 | glBindTexture(GL_TEXTURE_2D, _finalColorTex); |
---|
408 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
---|
409 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
---|
410 | #if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT) |
---|
411 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0, |
---|
412 | GL_RGB, GL_INT, NULL); |
---|
413 | #elif defined(HAVE_FLOAT_TEXTURES) |
---|
414 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0, |
---|
415 | GL_RGB, GL_INT, NULL); |
---|
416 | #else |
---|
417 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0, |
---|
418 | GL_RGB, GL_INT, NULL); |
---|
419 | #endif |
---|
420 | |
---|
421 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo); |
---|
422 | glGenRenderbuffersEXT(1, &_finalDepthRb); |
---|
423 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
---|
424 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, |
---|
425 | winWidth, winHeight); |
---|
426 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
---|
427 | GL_TEXTURE_2D, _finalColorTex, 0); |
---|
428 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, |
---|
429 | GL_RENDERBUFFER_EXT, _finalDepthRb); |
---|
430 | |
---|
431 | GLenum status; |
---|
432 | if (!CheckFBO(&status)) { |
---|
433 | PrintFBOStatus(status, "finalFbo"); |
---|
434 | return false; |
---|
435 | } |
---|
436 | |
---|
437 | TRACE("change camera"); |
---|
438 | //change the camera setting |
---|
439 | _camera->setViewport(0, 0, winWidth, winHeight); |
---|
440 | planeRenderer->setScreenSize(winWidth, winHeight); |
---|
441 | |
---|
442 | TRACE("Leave (%d, %d)", w, h); |
---|
443 | return true; |
---|
444 | } |
---|
445 | |
---|
446 | bool NanoVis::init(const char* path) |
---|
447 | { |
---|
448 | // print OpenGL driver information |
---|
449 | TRACE("-----------------------------------------------------------"); |
---|
450 | TRACE("OpenGL version: %s", glGetString(GL_VERSION)); |
---|
451 | TRACE("OpenGL vendor: %s", glGetString(GL_VENDOR)); |
---|
452 | TRACE("OpenGL renderer: %s", glGetString(GL_RENDERER)); |
---|
453 | TRACE("-----------------------------------------------------------"); |
---|
454 | |
---|
455 | if (path == NULL) { |
---|
456 | ERROR("No path defined for shaders or resources"); |
---|
457 | return false; |
---|
458 | } |
---|
459 | GLenum err = glewInit(); |
---|
460 | if (GLEW_OK != err) { |
---|
461 | ERROR("Can't init GLEW: %s", glewGetErrorString(err)); |
---|
462 | return false; |
---|
463 | } |
---|
464 | TRACE("Using GLEW %s", glewGetString(GLEW_VERSION)); |
---|
465 | |
---|
466 | // OpenGL 2.1 includes VBOs, PBOs, MRT, NPOT textures, point parameters, point sprites, |
---|
467 | // GLSL 1.2, and occlusion queries. |
---|
468 | if (!GLEW_VERSION_2_1) { |
---|
469 | ERROR("OpenGL version 2.1 or greater is required"); |
---|
470 | return false; |
---|
471 | } |
---|
472 | |
---|
473 | // NVIDIA driver may report OpenGL 2.1, but not support PBOs in |
---|
474 | // indirect GLX contexts |
---|
475 | if (!GLEW_ARB_pixel_buffer_object) { |
---|
476 | ERROR("Pixel buffer objects are not supported by driver, please check that the user running nanovis has permissions to create a direct rendering context (e.g. user has read/write access to /dev/nvidia* device nodes in Linux)."); |
---|
477 | return false; |
---|
478 | } |
---|
479 | |
---|
480 | // Additional extensions not in 2.1 core |
---|
481 | |
---|
482 | // Framebuffer objects were promoted in 3.0 |
---|
483 | if (!GLEW_EXT_framebuffer_object) { |
---|
484 | ERROR("EXT_framebuffer_oject extension is required"); |
---|
485 | return false; |
---|
486 | } |
---|
487 | // Rectangle textures were promoted in 3.1 |
---|
488 | // FIXME: can use NPOT in place of rectangle textures |
---|
489 | if (!GLEW_ARB_texture_rectangle) { |
---|
490 | ERROR("ARB_texture_rectangle extension is required"); |
---|
491 | return false; |
---|
492 | } |
---|
493 | #ifdef HAVE_FLOAT_TEXTURES |
---|
494 | // Float color buffers and textures were promoted in 3.0 |
---|
495 | if (!GLEW_ARB_texture_float || |
---|
496 | !GLEW_ARB_color_buffer_float) { |
---|
497 | ERROR("ARB_texture_float and ARB_color_buffer_float extensions are required"); |
---|
498 | return false; |
---|
499 | } |
---|
500 | #endif |
---|
501 | // FIXME: should use GLSL for portability |
---|
502 | #ifdef USE_ARB_PROGRAMS |
---|
503 | if (!GLEW_ARB_vertex_program || |
---|
504 | !GLEW_ARB_fragment_program) { |
---|
505 | ERROR("ARB_vertex_program and ARB_fragment_program extensions are required"); |
---|
506 | return false; |
---|
507 | } |
---|
508 | #else |
---|
509 | if (!GLEW_NV_vertex_program3 || |
---|
510 | !GLEW_NV_fragment_program2) { |
---|
511 | ERROR("NV_vertex_program3 and NV_fragment_program2 extensions are required"); |
---|
512 | return false; |
---|
513 | } |
---|
514 | #endif |
---|
515 | |
---|
516 | if (!FilePath::getInstance()->setPath(path)) { |
---|
517 | ERROR("can't set file path to %s", path); |
---|
518 | return false; |
---|
519 | } |
---|
520 | |
---|
521 | ImageLoaderFactory::getInstance()->addLoaderImpl("bmp", new BMPImageLoaderImpl()); |
---|
522 | |
---|
523 | return true; |
---|
524 | } |
---|
525 | |
---|
526 | bool |
---|
527 | NanoVis::initGL() |
---|
528 | { |
---|
529 | TRACE("in initGL"); |
---|
530 | //buffer to store data read from the screen |
---|
531 | if (screenBuffer) { |
---|
532 | delete[] screenBuffer; |
---|
533 | screenBuffer = NULL; |
---|
534 | } |
---|
535 | screenBuffer = new unsigned char[3*winWidth*winHeight]; |
---|
536 | assert(screenBuffer != NULL); |
---|
537 | |
---|
538 | //create the camera with default setting |
---|
539 | _camera = new Camera(0, 0, winWidth, winHeight); |
---|
540 | |
---|
541 | glEnable(GL_TEXTURE_2D); |
---|
542 | glShadeModel(GL_FLAT); |
---|
543 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
---|
544 | glClearColor(0, 0, 0, 1); |
---|
545 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
546 | |
---|
547 | //initialize lighting |
---|
548 | GLfloat mat_specular[] = {1.0, 1.0, 1.0, 1.0}; |
---|
549 | GLfloat mat_shininess[] = {30.0}; |
---|
550 | GLfloat white_light[] = {1.0, 1.0, 1.0, 1.0}; |
---|
551 | |
---|
552 | glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); |
---|
553 | glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess); |
---|
554 | glLightfv(GL_LIGHT0, GL_DIFFUSE, white_light); |
---|
555 | glLightfv(GL_LIGHT0, GL_SPECULAR, white_light); |
---|
556 | glLightfv(GL_LIGHT1, GL_DIFFUSE, white_light); |
---|
557 | glLightfv(GL_LIGHT1, GL_SPECULAR, white_light); |
---|
558 | |
---|
559 | //frame buffer object for offscreen rendering |
---|
560 | if (!initOffscreenBuffer()) { |
---|
561 | return false; |
---|
562 | } |
---|
563 | |
---|
564 | fonts = new Fonts(); |
---|
565 | fonts->addFont("verdana", "verdana.fnt"); |
---|
566 | fonts->setFont("verdana"); |
---|
567 | |
---|
568 | renderContext = new RenderContext(); |
---|
569 | |
---|
570 | volRenderer = new VolumeRenderer(); |
---|
571 | |
---|
572 | planeRenderer = new PlaneRenderer(winWidth, winHeight); |
---|
573 | |
---|
574 | velocityArrowsSlice = new VelocityArrowsSlice(); |
---|
575 | |
---|
576 | licRenderer = new LIC(); |
---|
577 | |
---|
578 | orientationIndicator = new OrientationIndicator(); |
---|
579 | |
---|
580 | grid = new Grid(); |
---|
581 | grid->setFont(fonts); |
---|
582 | |
---|
583 | //assert(glGetError()==0); |
---|
584 | |
---|
585 | TRACE("leaving initGL"); |
---|
586 | return true; |
---|
587 | } |
---|
588 | |
---|
589 | void NanoVis::update() |
---|
590 | { |
---|
591 | VolumeInterpolator *volInterp = volRenderer->getVolumeInterpolator(); |
---|
592 | if (volInterp->isStarted()) { |
---|
593 | struct timeval clock; |
---|
594 | gettimeofday(&clock, NULL); |
---|
595 | double elapsed_time = clock.tv_sec + clock.tv_usec/1000000.0 - |
---|
596 | volInterp->getStartTime(); |
---|
597 | |
---|
598 | TRACE("%g %g", elapsed_time, |
---|
599 | volInterp->getInterval()); |
---|
600 | double fraction; |
---|
601 | double f = fmod(elapsed_time, volInterp->getInterval()); |
---|
602 | if (f == 0.0) { |
---|
603 | fraction = 0.0; |
---|
604 | } else { |
---|
605 | fraction = f / volInterp->getInterval(); |
---|
606 | } |
---|
607 | TRACE("fraction : %g", fraction); |
---|
608 | volInterp->update((float)fraction); |
---|
609 | } |
---|
610 | } |
---|
611 | |
---|
612 | /** |
---|
613 | * \brief Called when new volumes are added to update ranges |
---|
614 | */ |
---|
615 | void |
---|
616 | NanoVis::setVolumeRanges() |
---|
617 | { |
---|
618 | TRACE("Enter"); |
---|
619 | |
---|
620 | double valueMin = DBL_MAX, valueMax = -DBL_MAX; |
---|
621 | VolumeHashmap::iterator itr; |
---|
622 | for (itr = volumeTable.begin(); |
---|
623 | itr != volumeTable.end(); ++itr) { |
---|
624 | Volume *volume = itr->second; |
---|
625 | if (valueMin > volume->wAxis.min()) { |
---|
626 | valueMin = volume->wAxis.min(); |
---|
627 | } |
---|
628 | if (valueMax < volume->wAxis.max()) { |
---|
629 | valueMax = volume->wAxis.max(); |
---|
630 | } |
---|
631 | } |
---|
632 | if ((valueMin < DBL_MAX) && (valueMax > -DBL_MAX)) { |
---|
633 | Volume::valueMin = valueMin; |
---|
634 | Volume::valueMax = valueMax; |
---|
635 | } |
---|
636 | Volume::updatePending = false; |
---|
637 | TRACE("Leave"); |
---|
638 | } |
---|
639 | |
---|
640 | /** |
---|
641 | * \brief Called when new heightmaps are added to update ranges |
---|
642 | */ |
---|
643 | void |
---|
644 | NanoVis::setHeightmapRanges() |
---|
645 | { |
---|
646 | TRACE("Enter"); |
---|
647 | |
---|
648 | double valueMin = DBL_MAX, valueMax = -DBL_MAX; |
---|
649 | HeightMapHashmap::iterator itr; |
---|
650 | for (itr = heightMapTable.begin(); |
---|
651 | itr != heightMapTable.end(); ++itr) { |
---|
652 | HeightMap *heightMap = itr->second; |
---|
653 | if (valueMin > heightMap->wAxis.min()) { |
---|
654 | valueMin = heightMap->wAxis.min(); |
---|
655 | } |
---|
656 | if (valueMax < heightMap->wAxis.max()) { |
---|
657 | valueMax = heightMap->wAxis.max(); |
---|
658 | } |
---|
659 | } |
---|
660 | if ((valueMin < DBL_MAX) && (valueMax > -DBL_MAX)) { |
---|
661 | HeightMap::valueMin = valueMin; |
---|
662 | HeightMap::valueMax = valueMax; |
---|
663 | } |
---|
664 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
665 | itr != heightMapTable.end(); ++itr) { |
---|
666 | itr->second->mapToGrid(grid); |
---|
667 | } |
---|
668 | HeightMap::updatePending = false; |
---|
669 | TRACE("Leave"); |
---|
670 | } |
---|
671 | |
---|
672 | void |
---|
673 | NanoVis::collectBounds(bool onlyVisible) |
---|
674 | { |
---|
675 | sceneBounds.makeEmpty(); |
---|
676 | |
---|
677 | for (VolumeHashmap::iterator itr = volumeTable.begin(); |
---|
678 | itr != volumeTable.end(); ++itr) { |
---|
679 | Volume *volume = itr->second; |
---|
680 | |
---|
681 | if (onlyVisible && !volume->visible()) |
---|
682 | continue; |
---|
683 | |
---|
684 | BBox bbox; |
---|
685 | volume->getBounds(bbox.min, bbox.max); |
---|
686 | sceneBounds.extend(bbox); |
---|
687 | } |
---|
688 | |
---|
689 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
690 | itr != heightMapTable.end(); ++itr) { |
---|
691 | HeightMap *heightMap = itr->second; |
---|
692 | |
---|
693 | if (onlyVisible && !heightMap->isVisible()) |
---|
694 | continue; |
---|
695 | |
---|
696 | BBox bbox; |
---|
697 | heightMap->getBounds(bbox.min, bbox.max); |
---|
698 | sceneBounds.extend(bbox); |
---|
699 | } |
---|
700 | |
---|
701 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
702 | itr != flowTable.end(); ++itr) { |
---|
703 | Flow *flow = itr->second; |
---|
704 | |
---|
705 | BBox bbox; |
---|
706 | flow->getBounds(bbox.min, bbox.max, onlyVisible); |
---|
707 | sceneBounds.extend(bbox); |
---|
708 | } |
---|
709 | |
---|
710 | if (!sceneBounds.isEmptyX()) { |
---|
711 | grid->xAxis.setScale(sceneBounds.min.x, sceneBounds.max.x); |
---|
712 | } |
---|
713 | if (!sceneBounds.isEmptyY()) { |
---|
714 | grid->yAxis.setScale(sceneBounds.min.y, sceneBounds.max.y); |
---|
715 | } |
---|
716 | if (!sceneBounds.isEmptyZ()) { |
---|
717 | grid->zAxis.setScale(sceneBounds.min.z, sceneBounds.max.z); |
---|
718 | } |
---|
719 | |
---|
720 | #if 0 |
---|
721 | if (!onlyVisible || grid->isVisible()) { |
---|
722 | BBox bbox; |
---|
723 | grid->getBounds(bbox.min, bbox.max); |
---|
724 | sceneBounds.extend(bbox); |
---|
725 | } |
---|
726 | #endif |
---|
727 | |
---|
728 | if (sceneBounds.isEmpty()) { |
---|
729 | sceneBounds.min.set(-0.5, -0.5, -0.5); |
---|
730 | sceneBounds.max.set( 0.5, 0.5, 0.5); |
---|
731 | } |
---|
732 | |
---|
733 | TRACE("Scene bounds: (%g,%g,%g) - (%g,%g,%g)", |
---|
734 | sceneBounds.min.x, sceneBounds.min.y, sceneBounds.min.z, |
---|
735 | sceneBounds.max.x, sceneBounds.max.y, sceneBounds.max.z); |
---|
736 | } |
---|
737 | |
---|
738 | void |
---|
739 | NanoVis::setBgColor(float color[3]) |
---|
740 | { |
---|
741 | TRACE("Setting bgcolor to %g %g %g", color[0], color[1], color[2]); |
---|
742 | glClearColor(color[0], color[1], color[2], 1); |
---|
743 | } |
---|
744 | |
---|
745 | void |
---|
746 | NanoVis::removeVolume(Volume *volume) |
---|
747 | { |
---|
748 | VolumeHashmap::iterator itr = volumeTable.find(volume->name()); |
---|
749 | if (itr != volumeTable.end()) { |
---|
750 | volumeTable.erase(itr); |
---|
751 | } |
---|
752 | delete volume; |
---|
753 | } |
---|
754 | |
---|
755 | Flow * |
---|
756 | NanoVis::getFlow(const char *name) |
---|
757 | { |
---|
758 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
759 | if (itr == flowTable.end()) { |
---|
760 | TRACE("Can't find flow '%s'", name); |
---|
761 | return NULL; |
---|
762 | } |
---|
763 | return itr->second; |
---|
764 | } |
---|
765 | |
---|
766 | Flow * |
---|
767 | NanoVis::createFlow(Tcl_Interp *interp, const char *name) |
---|
768 | { |
---|
769 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
770 | if (itr != flowTable.end()) { |
---|
771 | ERROR("Flow '%s' already exists", name); |
---|
772 | return NULL; |
---|
773 | } |
---|
774 | Flow *flow = new Flow(interp, name); |
---|
775 | flowTable[name] = flow; |
---|
776 | return flow; |
---|
777 | } |
---|
778 | |
---|
779 | /** |
---|
780 | * \brief Delete flow object and hash table entry |
---|
781 | * |
---|
782 | * This is called by the flow command instance delete callback |
---|
783 | */ |
---|
784 | void |
---|
785 | NanoVis::deleteFlow(const char *name) |
---|
786 | { |
---|
787 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
788 | if (itr != flowTable.end()) { |
---|
789 | delete itr->second; |
---|
790 | flowTable.erase(itr); |
---|
791 | } |
---|
792 | } |
---|
793 | |
---|
794 | /** |
---|
795 | * \brief Delete all flow object commands |
---|
796 | * |
---|
797 | * This will also delete the flow objects and hash table entries |
---|
798 | */ |
---|
799 | void |
---|
800 | NanoVis::deleteFlows(Tcl_Interp *interp) |
---|
801 | { |
---|
802 | FlowHashmap::iterator itr; |
---|
803 | for (itr = flowTable.begin(); |
---|
804 | itr != flowTable.end(); ++itr) { |
---|
805 | Tcl_DeleteCommandFromToken(interp, itr->second->getCommandToken()); |
---|
806 | } |
---|
807 | flowTable.clear(); |
---|
808 | } |
---|
809 | |
---|
810 | /** |
---|
811 | * \brief Called when new flows are added to update ranges |
---|
812 | */ |
---|
813 | bool |
---|
814 | NanoVis::setFlowRanges() |
---|
815 | { |
---|
816 | TRACE("Enter"); |
---|
817 | |
---|
818 | /* |
---|
819 | * Step 1. Get the overall min and max magnitudes of all the |
---|
820 | * flow vectors. |
---|
821 | */ |
---|
822 | Flow::magMin = DBL_MAX; |
---|
823 | Flow::magMax = -DBL_MAX; |
---|
824 | |
---|
825 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
826 | itr != flowTable.end(); ++itr) { |
---|
827 | Flow *flow = itr->second; |
---|
828 | if (!flow->isDataLoaded()) { |
---|
829 | continue; |
---|
830 | } |
---|
831 | double range[2]; |
---|
832 | flow->getVectorRange(range); |
---|
833 | if (range[0] < Flow::magMin) { |
---|
834 | Flow::magMin = range[0]; |
---|
835 | } |
---|
836 | if (range[1] > Flow::magMax) { |
---|
837 | Flow::magMax = range[1]; |
---|
838 | } |
---|
839 | } |
---|
840 | |
---|
841 | TRACE("magMin=%g magMax=%g", Flow::magMin, Flow::magMax); |
---|
842 | |
---|
843 | /* |
---|
844 | * Step 2. Generate the vector field from each data set. |
---|
845 | */ |
---|
846 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
847 | itr != flowTable.end(); ++itr) { |
---|
848 | Flow *flow = itr->second; |
---|
849 | if (!flow->isDataLoaded()) { |
---|
850 | continue; // Flow exists, but no data has been loaded yet. |
---|
851 | } |
---|
852 | if (flow->visible()) { |
---|
853 | flow->initializeParticles(); |
---|
854 | } |
---|
855 | } |
---|
856 | |
---|
857 | Flow::updatePending = false; |
---|
858 | return true; |
---|
859 | } |
---|
860 | |
---|
861 | void |
---|
862 | NanoVis::renderFlows() |
---|
863 | { |
---|
864 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
865 | itr != flowTable.end(); ++itr) { |
---|
866 | Flow *flow = itr->second; |
---|
867 | if (flow->isDataLoaded() && flow->visible()) { |
---|
868 | flow->render(); |
---|
869 | } |
---|
870 | } |
---|
871 | } |
---|
872 | |
---|
873 | void |
---|
874 | NanoVis::resetFlows() |
---|
875 | { |
---|
876 | NanoVis::licRenderer->reset(); |
---|
877 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
878 | itr != flowTable.end(); ++itr) { |
---|
879 | Flow *flow = itr->second; |
---|
880 | if (flow->isDataLoaded()) { |
---|
881 | flow->resetParticles(); |
---|
882 | } |
---|
883 | } |
---|
884 | } |
---|
885 | |
---|
886 | void |
---|
887 | NanoVis::advectFlows() |
---|
888 | { |
---|
889 | TRACE("Enter"); |
---|
890 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
891 | itr != flowTable.end(); ++itr) { |
---|
892 | Flow *flow = itr->second; |
---|
893 | if (flow->isDataLoaded()) { |
---|
894 | flow->advect(); |
---|
895 | } |
---|
896 | } |
---|
897 | } |
---|
898 | |
---|
899 | void |
---|
900 | NanoVis::render() |
---|
901 | { |
---|
902 | TRACE("Enter"); |
---|
903 | |
---|
904 | if (Flow::updatePending) { |
---|
905 | setFlowRanges(); |
---|
906 | } |
---|
907 | if (HeightMap::updatePending) { |
---|
908 | setHeightmapRanges(); |
---|
909 | } |
---|
910 | if (Volume::updatePending) { |
---|
911 | setVolumeRanges(); |
---|
912 | } |
---|
913 | |
---|
914 | collectBounds(); |
---|
915 | |
---|
916 | // Start final rendering |
---|
917 | |
---|
918 | // Need to reset fbo since it may have been changed to default (0) |
---|
919 | bindOffscreenBuffer(); |
---|
920 | |
---|
921 | // Clear screen |
---|
922 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
923 | |
---|
924 | glEnable(GL_DEPTH_TEST); |
---|
925 | glEnable(GL_COLOR_MATERIAL); |
---|
926 | |
---|
927 | // Emit modelview and projection matrices |
---|
928 | _camera->initialize(); |
---|
929 | |
---|
930 | // Now render things in the scene |
---|
931 | |
---|
932 | orientationIndicator->setPosition(sceneBounds.getCenter()); |
---|
933 | orientationIndicator->setScale(sceneBounds.getSize()); |
---|
934 | orientationIndicator->render(); |
---|
935 | |
---|
936 | grid->render(); |
---|
937 | |
---|
938 | licRenderer->render(); |
---|
939 | |
---|
940 | velocityArrowsSlice->render(); |
---|
941 | |
---|
942 | renderFlows(); |
---|
943 | |
---|
944 | volRenderer->renderAll(); |
---|
945 | |
---|
946 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
947 | itr != heightMapTable.end(); ++itr) { |
---|
948 | itr->second->render(renderContext); |
---|
949 | } |
---|
950 | |
---|
951 | CHECK_FRAMEBUFFER_STATUS(); |
---|
952 | TRACE("Leave"); |
---|
953 | redrawPending = false; |
---|
954 | } |
---|