pulsaranimationwidget.cpp 20.3 KB
Newer Older
Oliver Bock's avatar
Oliver Bock committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
/******************************************************************************
 *   Copyright (C) 2008 by Oliver Bock                                        *
 *   oliver.bock[AT]aei.mpg.de                                                *
 *                                                                            *
 *   This file is part of PulsatingScience.                                   *
 *                                                                            *
 *   PulsatingScience is free software: you can redistribute it and/or modify *
 *   it under the terms of the GNU General Public License as published        *
 *   by the Free Software Foundation, version 3 of the License.               *
 *                                                                            *
 *   PulsatingScience is distributed in the hope that it will be useful,      *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of           *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the             *
 *   GNU General Public License for more details.                             *
 *                                                                            *
 *   You should have received a copy of the GNU General Public License        *
 *   along with PulsatingScience. If not, see <http://www.gnu.org/licenses/>. *
 *                                                                            *
 ******************************************************************************/

#include "pulsaranimationwidget.h"

Oliver Bock's avatar
Oliver Bock committed
23
const double PulsarAnimationWidget::deg2rad = PI/180.0;
24

Oliver Bock's avatar
Oliver Bock committed
25
PulsarAnimationWidget::PulsarAnimationWidget(QWidget *parent) :
Oliver Bock's avatar
Oliver Bock committed
26
	QGLWidget(QGLFormat(QGL::AlphaChannel | QGL::SampleBuffers), parent),
27
	m_frameTimer(),
Oliver Bock's avatar
Oliver Bock committed
28
	m_pulseProfile(360, 0.0)
Oliver Bock's avatar
Oliver Bock committed
29
{
Oliver Bock's avatar
Oliver Bock committed
30
	QString msgThis = tr("3D animation");
Oliver Bock's avatar
Oliver Bock committed
31
	if(!format().directRendering()) {
Oliver Bock's avatar
Oliver Bock committed
32
33
		QString msg = tr("Sorry, no direct rendering support for %1...");
		qWarning() << msg.arg(msgThis);
Oliver Bock's avatar
Oliver Bock committed
34
35
	}
	if(!format().doubleBuffer()) {
Oliver Bock's avatar
Oliver Bock committed
36
37
		QString msg = tr("Sorry, no double buffering support for %1...");
		qWarning() << msg.arg(msgThis);
Oliver Bock's avatar
Oliver Bock committed
38
	}
39
	if(!format().rgba()) {
Oliver Bock's avatar
Oliver Bock committed
40
41
		QString msg = tr("Sorry, no RGBA support for %1...");
		qWarning() << msg.arg(msgThis);
42
43
	}
	if(!format().alpha()) {
Oliver Bock's avatar
Oliver Bock committed
44
45
		QString msg = tr("Sorry, no alpha channel support for %1...");
		qWarning() << msg.arg(msgThis);
46
	}
Oliver Bock's avatar
Oliver Bock committed
47
	if(!format().sampleBuffers()) {
Oliver Bock's avatar
Oliver Bock committed
48
49
		QString msg = tr("Sorry, no multisampling support for %1...");
		qWarning() << msg.arg(msgThis);
Oliver Bock's avatar
Oliver Bock committed
50
	}
51

Oliver Bock's avatar
Oliver Bock committed
52
	// connect primary rendering timer to local callback
Oliver Bock's avatar
Oliver Bock committed
53
    connect(&m_frameTimer, SIGNAL(timeout()), this, SLOT(updateFrame()));
Oliver Bock's avatar
Oliver Bock committed
54

Oliver Bock's avatar
Oliver Bock committed
55
    // initialize quadric pointers
Oliver Bock's avatar
Oliver Bock committed
56
57
    m_quadricCompanionOrbitPlane = NULL;
    m_quadricCompanion = NULL;
58
    m_quadricPulsarOrbitPlane = NULL;
Oliver Bock's avatar
Oliver Bock committed
59
    m_quadricPulsar = NULL;
60
61
	m_quadricPulsarCone1 = NULL;
	m_quadricPulsarCone2 = NULL;
62
	m_quadricPulsarSpinAxis = NULL;
63
	m_quadricPulsarMagneticAxis = NULL;
Oliver Bock's avatar
Oliver Bock committed
64

Oliver Bock's avatar
Oliver Bock committed
65
	// initialize texture pointers
66
67
	m_pulsarTexture = 0;
	m_backgroundTexture = 0;
68

Oliver Bock's avatar
Oliver Bock committed
69
	// initial render timing settings
Oliver Bock's avatar
Oliver Bock committed
70
	m_framesPerSecond = 25;
Oliver Bock's avatar
Oliver Bock committed
71
72
	m_pulsarRotationDelta = 0.0;
	m_orbitRotationDelta = 0.0;
73
74
	m_pulsarRotationAngle = 0.0;
	m_orbitRotationAngle = 0.0;
75

Oliver Bock's avatar
Oliver Bock committed
76
	// initial binary system parameters (have to match GUI!)
Oliver Bock's avatar
Oliver Bock committed
77
	m_pulsarMass = 1.4;
Oliver Bock's avatar
Oliver Bock committed
78
	// initial companion is "Neutron Star"
Oliver Bock's avatar
Oliver Bock committed
79
80
81
82
	m_companionMass = 1.4;
	m_pulsarSpinAxisInclination = 0.0;
	m_pulsarMagneticAxisInclination = 45.0;
	m_pulsarSemiMajorAxis = 5.0;
Oliver Bock's avatar
Oliver Bock committed
83
84
	m_companionSemiMajorAxis = (m_pulsarMass/m_companionMass) * m_pulsarSemiMajorAxis;
	// initial spin frequency of 0.5 Hz
Oliver Bock's avatar
Oliver Bock committed
85
	m_pulsarRotationDelta = (360.0 * 0.5) / m_framesPerSecond;
Oliver Bock's avatar
Oliver Bock committed
86
87
	// update orbital period (based on settings above)
	updateOrbitPeriod();
Oliver Bock's avatar
Oliver Bock committed
88

Oliver Bock's avatar
Oliver Bock committed
89
	// initial view features
90
	m_showOrbits = false;
Oliver Bock's avatar
Oliver Bock committed
91
	m_showRotationAxes = false;
92
	m_cameraInteraction = false;
93

Oliver Bock's avatar
Oliver Bock committed
94
	// initial view settings
Oliver Bock's avatar
Oliver Bock committed
95
96
	m_mouseAngleH = 90.0;
	m_mouseAngleV = 30.0;
97
98
99
	m_cameraZoom = 150.0;
	m_cameraZoomLBound = 10.0;
	m_cameraZoomUBound = 4500.0;
Oliver Bock's avatar
Oliver Bock committed
100
101
	m_mouseLastX = 0;
	m_mouseLastY = 0;
102

Oliver Bock's avatar
Oliver Bock committed
103
	// update camera based on settings above
104
	updateCameraPosition(m_mouseAngleH, m_mouseAngleV, m_cameraZoom);
105

Oliver Bock's avatar
Oliver Bock committed
106
	// finally, create initial pulse profile based on settings above
107
	updatePulseProfile();
Oliver Bock's avatar
Oliver Bock committed
108
109
110
111
}

PulsarAnimationWidget::~PulsarAnimationWidget()
{
Oliver Bock's avatar
Oliver Bock committed
112
113
	if(m_quadricCompanionOrbitPlane) gluDeleteQuadric(m_quadricCompanionOrbitPlane);
	if(m_quadricCompanion) gluDeleteQuadric(m_quadricCompanion);
114
	if(m_quadricPulsarOrbitPlane) gluDeleteQuadric(m_quadricPulsarOrbitPlane);
Oliver Bock's avatar
Oliver Bock committed
115
116
117
	if(m_quadricPulsar) gluDeleteQuadric(m_quadricPulsar);
	if(m_quadricPulsarCone1) gluDeleteQuadric(m_quadricPulsarCone1);
	if(m_quadricPulsarCone2) gluDeleteQuadric(m_quadricPulsarCone2);
118
	if(m_quadricPulsarSpinAxis) gluDeleteQuadric(m_quadricPulsarSpinAxis);
119
	if(m_quadricPulsarMagneticAxis) gluDeleteQuadric(m_quadricPulsarMagneticAxis);
120
121
122

	if(m_pulsarTexture) deleteTexture(m_pulsarTexture);
	if(m_backgroundTexture) deleteTexture(m_backgroundTexture);
Oliver Bock's avatar
Oliver Bock committed
123
124
125
126
}

void PulsarAnimationWidget::initializeGL()
{
Oliver Bock's avatar
Oliver Bock committed
127
	glClearColor(0.0, 0.0, 0.0, 0.0);
Oliver Bock's avatar
Oliver Bock committed
128
	glClearDepth(1.0);
Oliver Bock's avatar
Oliver Bock committed
129
	glDepthFunc(GL_LEQUAL);
130
131
132
	glEnable(GL_DEPTH_TEST);

	glShadeModel(GL_SMOOTH);
Oliver Bock's avatar
Oliver Bock committed
133
134
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);

Oliver Bock's avatar
Oliver Bock committed
135
136
137
138
139
	GLfloat LightAmbient[] = {0.3, 0.3, 0.3, 1.0};
	GLfloat LightDiffuse[] = {1.0, 1.0, 1.0, 1.0};
	GLfloat LightSpecular[] = {1.0, 1.0, 1.0, 1.0};
	GLfloat LightPosition[] = {0.0, 0.0, 3.0, 1.0};
	GLfloat spot_direction[] = {0.0, 0.0, -1.0};
Oliver Bock's avatar
Oliver Bock committed
140
141
142
143
144

	glLightfv(GL_LIGHT0, GL_AMBIENT, LightAmbient);
	glLightfv(GL_LIGHT0, GL_DIFFUSE, LightDiffuse);
	glLightfv(GL_LIGHT0, GL_SPECULAR, LightSpecular);
	glLightfv(GL_LIGHT0, GL_POSITION, LightPosition);
145
	glLightf(GL_LIGHT0, GL_SPOT_CUTOFF, 50.0);
Oliver Bock's avatar
Oliver Bock committed
146
	glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, spot_direction);
147
	glLightf(GL_LIGHT0, GL_SPOT_EXPONENT, 10.0);
Oliver Bock's avatar
Oliver Bock committed
148
149
150
151

	glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
	glEnable(GL_LIGHT0);
	glEnable(GL_LIGHTING);
Oliver Bock's avatar
Oliver Bock committed
152

153
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
154
	glEnable(GL_BLEND);
155

Oliver Bock's avatar
Oliver Bock committed
156
157
	m_quadricCompanionOrbitPlane = gluNewQuadric();
	m_quadricCompanion = gluNewQuadric();
158
	m_quadricPulsarOrbitPlane = gluNewQuadric();
Oliver Bock's avatar
Oliver Bock committed
159
160
161
	m_quadricPulsar = gluNewQuadric();
    m_quadricPulsarCone1 = gluNewQuadric();
    m_quadricPulsarCone2 = gluNewQuadric();
162
    m_quadricPulsarSpinAxis = gluNewQuadric();
163
    m_quadricPulsarMagneticAxis = gluNewQuadric();
164

Oliver Bock's avatar
Oliver Bock committed
165
166
    gluQuadricNormals(m_quadricCompanionOrbitPlane, GLU_SMOOTH);
    gluQuadricNormals(m_quadricCompanion, GLU_SMOOTH);
167
    gluQuadricNormals(m_quadricPulsarOrbitPlane, GLU_SMOOTH);
Oliver Bock's avatar
Oliver Bock committed
168
169
170
    gluQuadricNormals(m_quadricPulsar, GLU_SMOOTH);
    gluQuadricNormals(m_quadricPulsarCone1, GLU_SMOOTH);
    gluQuadricNormals(m_quadricPulsarCone2, GLU_SMOOTH);
171
    gluQuadricNormals(m_quadricPulsarSpinAxis, GLU_SMOOTH);
172
    gluQuadricNormals(m_quadricPulsarMagneticAxis, GLU_SMOOTH);
173

Oliver Bock's avatar
Oliver Bock committed
174
175
176
177
    // query max texture size (estimate)
    GLint maxTextureSize;
    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);

Oliver Bock's avatar
Oliver Bock committed
178
179
180
181
182
    // prepare local messages
    QString msgShape = tr("%1 texture shape not quadratic!");
    QString msgPower = tr("%1 texture dimensions not a power of 2!");
    QString msgSize = tr("Maximum texture size exceeded! Scaling down %1 texture to %2x%3...");

Oliver Bock's avatar
Oliver Bock committed
183
184
185
    // prepare and check pulsar texture
    QImage pulsarTexture(":/textures/resources/texture_pulsar.png");
    if(pulsarTexture.width() != pulsarTexture.height()) {
Oliver Bock's avatar
Oliver Bock committed
186
    	qWarning() << msgShape.arg(tr("Pulsar"));
Oliver Bock's avatar
Oliver Bock committed
187
188
189
190
191
192
    }
    else {
    	double integer = 0.0;
    	double fraction = 0.0;
    	fraction = modf(log(pulsarTexture.width()) / log(2.0), &integer);
    	if(fraction > 0.0) {
Oliver Bock's avatar
Oliver Bock committed
193
    		qWarning() << msgPower.arg(tr("Pulsar"));
Oliver Bock's avatar
Oliver Bock committed
194
195
196
    	}
    }
    if(pulsarTexture.width() > maxTextureSize) {
Oliver Bock's avatar
Oliver Bock committed
197
    	qWarning() << msgSize.arg(tr("pulsar").arg(maxTextureSize).arg(maxTextureSize));
Oliver Bock's avatar
Oliver Bock committed
198
199
200
201
202
203
    	pulsarTexture = pulsarTexture.scaled(maxTextureSize, maxTextureSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
    }

    // prepare and check background texture
    QImage backgroundTexture(":/textures/resources/texture_background_carina.jpg");
    if(backgroundTexture.width() != backgroundTexture.height()) {
Oliver Bock's avatar
Oliver Bock committed
204
    	qWarning() << msgShape.arg(tr("Background"));
Oliver Bock's avatar
Oliver Bock committed
205
206
207
208
209
210
    }
    else {
    	double integer = 0.0;
    	double fraction = 0.0;
    	fraction = modf(log(backgroundTexture.width()) / log(2.0), &integer);
    	if(fraction > 0.0) {
Oliver Bock's avatar
Oliver Bock committed
211
    		qWarning() << msgPower.arg(tr("Background"));
Oliver Bock's avatar
Oliver Bock committed
212
213
214
    	}
    }
    if(backgroundTexture.width() > maxTextureSize) {
Oliver Bock's avatar
Oliver Bock committed
215
    	qWarning() << msgSize.arg(tr("background").arg(maxTextureSize).arg(maxTextureSize));
Oliver Bock's avatar
Oliver Bock committed
216
217
218
219
220
221
    	backgroundTexture = backgroundTexture.scaled(maxTextureSize, maxTextureSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
    }

    // bind textures
    m_pulsarTexture = bindTexture(pulsarTexture, GL_TEXTURE_2D, GL_RGBA);
    m_backgroundTexture = bindTexture(backgroundTexture, GL_TEXTURE_2D, GL_RGB);
222

223
    // use mipmapped textures
224
225
226
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);

Oliver Bock's avatar
Oliver Bock committed
227
228
229
    // enable 2D mapping (s/t coordinates, sphere map won't rotate texture!)
    glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
    glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
Oliver Bock's avatar
Oliver Bock committed
230
231
232
233
}

void PulsarAnimationWidget::resizeGL(int w, int h)
{
Oliver Bock's avatar
Oliver Bock committed
234
235
236
237
238
	glViewport(0, 0, w, h);

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();

239
	gluPerspective(4.5, (GLfloat)w / (GLfloat)h, 0.1, 5000.0);
Oliver Bock's avatar
Oliver Bock committed
240
241
242
243
244
245
246
247
248
249
250
251

	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
}

void PulsarAnimationWidget::paintGL()
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

252
253
	gluLookAt(m_cameraPosX, m_cameraPosY, m_cameraPosZ,
			  0.0, 0.0, 0.0,
254
			  0.0, 1.0, 0.0);
Oliver Bock's avatar
Oliver Bock committed
255
256

	// TODO: should be located elsewhere
Oliver Bock's avatar
Oliver Bock committed
257
258
259
260
261
	static GLfloat no_mat[] = {0.0, 0.0, 0.0, 1.0};
	static GLfloat mat_diffuse[] = {0.5, 0.5, 0.5, 1.0};
	static GLfloat mat_specular[] = {1.0, 1.0, 1.0, 1.0};
	static GLfloat low_shininess[] = {2.5};
	static GLfloat translucent[] = {1.0, 1.0, 1.0, 0.33};
262

Oliver Bock's avatar
Oliver Bock committed
263
264
265
266
267
	glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);
	glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
	glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
	glMaterialfv(GL_FRONT, GL_SHININESS, low_shininess);
	glMaterialfv(GL_FRONT, GL_EMISSION, no_mat);
Oliver Bock's avatar
Oliver Bock committed
268

269
	// draw companion
Oliver Bock's avatar
Oliver Bock committed
270
	glPushMatrix();
Oliver Bock's avatar
Oliver Bock committed
271
272
273
274
		glTranslatef(sin((m_orbitRotationAngle + 180.0) * deg2rad) * m_companionSemiMajorAxis,
					 0.0,
					 cos((m_orbitRotationAngle + 180.0) * deg2rad) * m_companionSemiMajorAxis);
		gluSphere(m_quadricCompanion, 1.0, 32, 32);
Oliver Bock's avatar
Oliver Bock committed
275
276
	glPopMatrix();

277
	// draw pulsar
Oliver Bock's avatar
Oliver Bock committed
278
	glPushMatrix();
Oliver Bock's avatar
Oliver Bock committed
279
		glTranslatef(sin(m_orbitRotationAngle * deg2rad) * m_pulsarSemiMajorAxis,
Oliver Bock's avatar
Oliver Bock committed
280
					 0.0,
Oliver Bock's avatar
Oliver Bock committed
281
					 cos(m_orbitRotationAngle * deg2rad) * m_pulsarSemiMajorAxis);
282
283

		glPushMatrix();
Oliver Bock's avatar
Oliver Bock committed
284
285
			glRotatef(m_pulsarSpinAxisInclination, 0.0, 0.0, 1.0);
			glRotatef(m_pulsarRotationAngle, 0.0, 1.0, 0.0);
286

287
			// draw spin axis
Oliver Bock's avatar
Oliver Bock committed
288
			if(m_showRotationAxes) {
289
290
				glPushMatrix();
					glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, translucent);
Oliver Bock's avatar
Oliver Bock committed
291
292
293
					glRotatef(90.0, 1.0, 0.0, 0.0);
					glTranslatef(0.0, 0.0, -5.0);
					gluCylinder(m_quadricPulsarSpinAxis, 0.05, 0.05, 10.0, 32, 1);
294
295
296
				glPopMatrix();
			}

297
298
299
300
301
			// create texture coordinates and enable texturing
	        glEnable(GL_TEXTURE_GEN_S);
	        glEnable(GL_TEXTURE_GEN_T);
	        glBindTexture(GL_TEXTURE_2D, m_pulsarTexture);
	        glEnable(GL_TEXTURE_2D);
302
303
304

			glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);
			glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
Oliver Bock's avatar
Oliver Bock committed
305
			gluSphere(m_quadricPulsar, 1.0, 32, 32);
306

307
			// disable texturing
308
309
310
	        glDisable(GL_TEXTURE_GEN_S);
	        glDisable(GL_TEXTURE_GEN_T);
	        glDisable(GL_TEXTURE_2D);
311
312
		glPopMatrix();

313
		// TODO: should be located elsewhere
Oliver Bock's avatar
Oliver Bock committed
314
315
316
		static GLfloat coneAmbient[] = {1.0, 1.0, 0.0, 1.0};
		static GLfloat coneDiffuse[] = {1.0, 1.0, 0.0, 1.0};
		static GLfloat coneSpecular[] = {1.0, 1.0, 0.5, 1.0};
317
318
319

		glMaterialfv(GL_FRONT, GL_SPECULAR, coneSpecular);

320
		// first cone
321
		glPushMatrix();
Oliver Bock's avatar
Oliver Bock committed
322
323
			glRotatef(90.0, 1.0, 0.0, 0.0);
			glRotatef(m_pulsarSpinAxisInclination, 0.0, 1.0, 0.0);
324

Oliver Bock's avatar
Oliver Bock committed
325
326
			glRotatef(-m_pulsarRotationAngle - 90.0, 0.0, 0.0, 1.0);
			glRotatef(-m_pulsarMagneticAxisInclination, 1.0, 0.0, 0.0);
327

328
			// draw magnetic axis (for both cones)
Oliver Bock's avatar
Oliver Bock committed
329
			if(m_showRotationAxes) {
330
331
				glPushMatrix();
					glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, translucent);
Oliver Bock's avatar
Oliver Bock committed
332
333
					glTranslatef(0.0, 0.0, -5.0);
					gluCylinder(m_quadricPulsarMagneticAxis, 0.05, 0.05, 10.0, 32, 1);
334
				glPopMatrix();
335
336
			}

Oliver Bock's avatar
Oliver Bock committed
337
			glTranslatef(0.0, 0.0, -4.0);
338
339
340

			glMaterialfv(GL_FRONT, GL_AMBIENT, coneAmbient);
			glMaterialfv(GL_FRONT, GL_DIFFUSE, coneDiffuse);
Oliver Bock's avatar
Oliver Bock committed
341
			gluCylinder(m_quadricPulsarCone1, 0.475, 0.0, 3.0, 32, 32);
342
343
		glPopMatrix();

344
		// second cone
345
		glPushMatrix();
Oliver Bock's avatar
Oliver Bock committed
346
347
			glRotatef(-90.0, 1.0, 0.0, 0.0);
			glRotatef(-m_pulsarSpinAxisInclination, 0.0, 1.0, 0.0);
348

Oliver Bock's avatar
Oliver Bock committed
349
350
			glRotatef(m_pulsarRotationAngle - 90.0, 0.0, 0.0, 1.0);
			glRotatef(m_pulsarMagneticAxisInclination, 1.0, 0.0, 0.0);
351

Oliver Bock's avatar
Oliver Bock committed
352
			glTranslatef(0.0, 0.0, -4.0);
353
354
355

			glMaterialfv(GL_FRONT, GL_AMBIENT, coneAmbient);
			glMaterialfv(GL_FRONT, GL_DIFFUSE, coneDiffuse);
Oliver Bock's avatar
Oliver Bock committed
356
			gluCylinder(m_quadricPulsarCone2, 0.475, 0.0, 3.0, 32, 32);
357
		glPopMatrix();
Oliver Bock's avatar
Oliver Bock committed
358
	glPopMatrix();
359

360
361
362
363
	// save current state
	glMatrixMode(GL_PROJECTION);
	glPushMatrix();
	glLoadIdentity();
Oliver Bock's avatar
Oliver Bock committed
364
	glOrtho(0, width(), 0, height(), 0.1, 501.0);
365
366
367
368
369
370
	glMatrixMode(GL_MODELVIEW);
	glPushMatrix();
	glLoadIdentity();

	// draw backdrop (independent parallel projection)
	glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, mat_specular);
Oliver Bock's avatar
Oliver Bock committed
371
372
	glTranslatef(0.0, 0.0, -501.0);
	drawTexture(QPointF(0.0, 0.0), m_backgroundTexture);
373
374
375
376
377
378
379

	// restore original state
	glMatrixMode(GL_PROJECTION);
	glPopMatrix();
	glMatrixMode(GL_MODELVIEW);
	glPopMatrix();

Oliver Bock's avatar
Oliver Bock committed
380
	// draw orbital planes
381
	if(m_cameraInteraction || m_showOrbits) {
382
		glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, translucent);
383

Oliver Bock's avatar
Oliver Bock committed
384
		static double sizeOffset = 0.25;
385
386
387
388

		// companion's plane (only if not identical with pulsar's)
		if(m_companionSemiMajorAxis != m_pulsarSemiMajorAxis) {
			glPushMatrix();
Oliver Bock's avatar
Oliver Bock committed
389
				glRotatef(90.0, 1.0, 0.0, 0.0);
390
391
392
393

				// separate them slightly in case of overlap
				// based on ugly mass diff check (no collision detection)
				// single known problematic pair: (m_c=1.4, m_p=1.5)
Oliver Bock's avatar
Oliver Bock committed
394
395
				if((int)(10*(m_pulsarMass-m_companionMass)+0.5) == 1){
					glTranslatef(0.0, 0.0, 0.01);
396
397
398
399
400
401
402
403
404
405
				}

				gluDisk(m_quadricCompanionOrbitPlane,
						m_companionSemiMajorAxis - sizeOffset,
						m_companionSemiMajorAxis + sizeOffset,
						64, 1);
			glPopMatrix();
		}

		// pulsar's plane
Oliver Bock's avatar
Oliver Bock committed
406
		glPushMatrix();
Oliver Bock's avatar
Oliver Bock committed
407
			glRotatef(90.0, 1.0, 0.0, 0.0);
408
			gluDisk(m_quadricPulsarOrbitPlane,
409
410
					m_pulsarSemiMajorAxis - sizeOffset,
					m_pulsarSemiMajorAxis + sizeOffset,
411
412
					64, 1);
		glPopMatrix();
413
	}
Oliver Bock's avatar
Oliver Bock committed
414
415
}

Oliver Bock's avatar
Oliver Bock committed
416
417
void PulsarAnimationWidget::runAnimation()
{
Oliver Bock's avatar
Oliver Bock committed
418
	m_frameTimer.start(1000.0 / m_framesPerSecond);
Oliver Bock's avatar
Oliver Bock committed
419
}
Oliver Bock's avatar
Oliver Bock committed
420

Oliver Bock's avatar
Oliver Bock committed
421
422
423
424
425
426
427
428
void PulsarAnimationWidget::pauseAnimation()
{
	m_frameTimer.stop();
}

void PulsarAnimationWidget::stopAnimation()
{
	m_frameTimer.stop();
429
	resetParameters();
Oliver Bock's avatar
Oliver Bock committed
430
431
432
433

	updateGL();
}

Oliver Bock's avatar
Oliver Bock committed
434
void PulsarAnimationWidget::updateFrame()
Oliver Bock's avatar
Oliver Bock committed
435
{
Oliver Bock's avatar
Oliver Bock committed
436
	m_pulsarRotationAngle += m_pulsarRotationDelta;
Oliver Bock's avatar
Oliver Bock committed
437
438
	if(m_pulsarRotationAngle > 360.0) {
		m_pulsarRotationAngle -= 360.0;
439
		updatePulseProfile();
Oliver Bock's avatar
Oliver Bock committed
440
	}
Oliver Bock's avatar
Oliver Bock committed
441
	m_orbitRotationAngle += m_orbitRotationDelta;
Oliver Bock's avatar
Oliver Bock committed
442
443
	if(m_orbitRotationAngle > 360.0) {
		m_orbitRotationAngle -= 360.0;
Oliver Bock's avatar
Oliver Bock committed
444
445
	}

Oliver Bock's avatar
Oliver Bock committed
446
	updateGL();
Oliver Bock's avatar
Oliver Bock committed
447

448
	emit pulsarAnimationStep(m_pulsarRotationAngle);
449
450
}

451
452
453
454
455
456
457
void PulsarAnimationWidget::showOrbits(bool enabled)
{
	m_showOrbits = enabled;

	updateGL();
}

Oliver Bock's avatar
Oliver Bock committed
458
459
460
461
462
463
464
void PulsarAnimationWidget::showRotationAxes(bool enabled)
{
	m_showRotationAxes = enabled;

	updateGL();
}

465
466
void PulsarAnimationWidget::mousePressEvent(QMouseEvent *event)
{
467
468
	Q_UNUSED(event);

469
470
471
472
	m_cameraInteraction = true;
	updateGL();
}

473
474
475
476
477
void PulsarAnimationWidget::mouseMoveEvent(QMouseEvent *event)
{
	Qt::MouseButtons buttons = event->buttons();
	if((buttons & Qt::LeftButton) == Qt::LeftButton) {
		if(m_mouseLastX != 0) {
Oliver Bock's avatar
Oliver Bock committed
478
			m_mouseAngleH += (m_mouseLastX - event->x());
Oliver Bock's avatar
Oliver Bock committed
479
			m_mouseAngleH = m_mouseAngleH < 360 ? m_mouseAngleH : 0;
Oliver Bock's avatar
Oliver Bock committed
480
			m_mouseAngleH = m_mouseAngleH >= 0 ? m_mouseAngleH : 359;
481
482
		}
		if(m_mouseLastY != 0) {
Oliver Bock's avatar
Oliver Bock committed
483
			m_mouseAngleV -= (m_mouseLastY - event->y());
Oliver Bock's avatar
Oliver Bock committed
484
485
			m_mouseAngleV = m_mouseAngleV < 90 ? m_mouseAngleV : 90;
			m_mouseAngleV = m_mouseAngleV > -90 ? m_mouseAngleV : -90;
486
487
488
489
490
491
492
		}

		m_mouseLastX = event->x();
		m_mouseLastY = event->y();
	}
	else if((buttons & Qt::RightButton) == Qt::RightButton) {
		if(m_mouseLastY != 0) {
Oliver Bock's avatar
Oliver Bock committed
493
			m_cameraZoom -= (m_mouseLastY - event->y());
Oliver Bock's avatar
Oliver Bock committed
494
			m_cameraZoom = m_cameraZoom >= m_cameraZoomLBound ? m_cameraZoom : m_cameraZoomLBound;
495
			m_cameraZoom = m_cameraZoom >= m_cameraZoomUBound ? m_cameraZoomUBound : m_cameraZoom;
496
497
498
499
500
501
502
503
504
505
		}

		m_mouseLastY = event->y();
	}

	updateCameraPosition(m_mouseAngleH, m_mouseAngleV, m_cameraZoom);
}

void PulsarAnimationWidget::mouseReleaseEvent(QMouseEvent *event)
{
506
507
	Q_UNUSED(event);

508
509
	m_mouseLastX = 0;
	m_mouseLastY = 0;
510
	m_cameraInteraction = false;
511

512
	updateGL();
513
514
}

Oliver Bock's avatar
Oliver Bock committed
515
void PulsarAnimationWidget::updateCameraPosition(const int angleH, const int angleV, const double zoom)
516
{
517
	m_cameraPosX = sin(angleH * deg2rad) * cos(angleV * deg2rad) * zoom;
518
	m_cameraPosY = sin(angleV * deg2rad) * zoom;
Oliver Bock's avatar
Oliver Bock committed
519
	m_cameraPosZ = cos(angleH * deg2rad) * cos(angleV * deg2rad) * zoom;
520

521
522
	updatePulseProfile();

523
524
525
	updateGL();
}

Oliver Bock's avatar
Oliver Bock committed
526
527
528
529
530
void PulsarAnimationWidget::setFramePerSecond(const unsigned int fps)
{
	m_framesPerSecond = fps;
}

Oliver Bock's avatar
Oliver Bock committed
531
void PulsarAnimationWidget::setPulsarSemiMajorAxis(const double length)
Oliver Bock's avatar
Oliver Bock committed
532
{
Oliver Bock's avatar
Oliver Bock committed
533
534
535
	m_pulsarSemiMajorAxis = length;
	m_companionSemiMajorAxis = (m_pulsarMass/m_companionMass) * m_pulsarSemiMajorAxis;
	updateOrbitPeriod();
536
	updatePulseProfile();
Oliver Bock's avatar
Oliver Bock committed
537
538

	updateGL();
Oliver Bock's avatar
Oliver Bock committed
539
}
540

Oliver Bock's avatar
Oliver Bock committed
541
void PulsarAnimationWidget::setCompanionMass(const double mass)
542
{
Oliver Bock's avatar
Oliver Bock committed
543
544
	m_companionMass = mass;
	updateOrbitRadii();
545
	updatePulseProfile();
Oliver Bock's avatar
Oliver Bock committed
546
547

	updateGL();
548
549
}

Oliver Bock's avatar
Oliver Bock committed
550
void PulsarAnimationWidget::setPulsarMass(const double mass)
551
{
Oliver Bock's avatar
Oliver Bock committed
552
553
	m_pulsarMass = mass;
	updateOrbitRadii();
554
	updatePulseProfile();
Oliver Bock's avatar
Oliver Bock committed
555
556
557
558

	updateGL();
}

Oliver Bock's avatar
Oliver Bock committed
559
void PulsarAnimationWidget::setPulsarSpinFrequency(const double frequency)
Oliver Bock's avatar
Oliver Bock committed
560
{
Oliver Bock's avatar
Oliver Bock committed
561
	m_pulsarRotationDelta = (360.0 * frequency) / m_framesPerSecond;
562
	updatePulseProfile();
563
}
564

565
566
567
void PulsarAnimationWidget::setPulsarSpinAxisInclination(const int degrees)
{
	m_pulsarSpinAxisInclination = degrees;
568
	updatePulseProfile();
569
570
571
572

	updateGL();
}

573
574
575
void PulsarAnimationWidget::setPulsarMagneticAxisInclination(const int degrees)
{
	m_pulsarMagneticAxisInclination = degrees;
Oliver Bock's avatar
Oliver Bock committed
576
	updatePulseProfile();
577
578
579

	updateGL();
}
580

Oliver Bock's avatar
Oliver Bock committed
581
582
583
void PulsarAnimationWidget::updateOrbitPeriod()
{
	m_orbitalPeriod = 3.1553e7 * sqrt(
Oliver Bock's avatar
Oliver Bock committed
584
585
						(pow(m_pulsarSemiMajorAxis, 3.0) * pow(m_pulsarMass+m_companionMass, 2.0)) /
						 pow(m_companionMass, 3.0)
Oliver Bock's avatar
Oliver Bock committed
586
587
588
589
590
591
592
593
594
595
596
					  );

	// visual correction factor (increase orbital momentum)
	double visualCorrection = 1e-8;

	m_orbitRotationDelta  = (360.0 / (m_orbitalPeriod*visualCorrection)) / m_framesPerSecond;
}

void PulsarAnimationWidget::updateOrbitRadii()
{
	m_pulsarSemiMajorAxis = 1.0015e-5 * pow(
Oliver Bock's avatar
Oliver Bock committed
597
598
599
								(pow(m_orbitalPeriod, 2.0) * pow(m_companionMass, 3.0)) /
								 pow(m_pulsarMass+m_companionMass, 2.0),
								 1.0/3.0
Oliver Bock's avatar
Oliver Bock committed
600
601
602
603
604
605
606
							);

	m_companionSemiMajorAxis = (m_pulsarMass/m_companionMass) * m_pulsarSemiMajorAxis;

	emit pulsarSemiMajorAxisUpdated(m_pulsarSemiMajorAxis);
}

607
608
void PulsarAnimationWidget::resetParameters()
{
Oliver Bock's avatar
Oliver Bock committed
609
610
	m_pulsarRotationAngle = 0.0;
	m_orbitRotationAngle = 0.0;
611
	updatePulseProfile();
Oliver Bock's avatar
Oliver Bock committed
612

613
	emit pulsarAnimationStep(m_pulsarRotationAngle);
614
}
615
616
617

void PulsarAnimationWidget::updatePulseProfile()
{
Oliver Bock's avatar
Oliver Bock committed
618
619
620
621
622
623
624
625
626
627
	// prepare parameters (e.g. convert to radians where necessary)
	const double	i				= deg2rad * m_pulsarSpinAxisInclination;
	const double	y				= deg2rad * m_pulsarMagneticAxisInclination;
	double			phiOrb			= deg2rad * m_orbitRotationAngle;
	const double	deltaPhiRot		= deg2rad * 1.0;
	const double	deltaPhiOrb		= deg2rad * deltaPhiRot * m_orbitRotationDelta / m_pulsarRotationDelta;
	const double	rp				= m_pulsarSemiMajorAxis;
	const double	xk				= -m_cameraPosZ;
	const double	yk				= -m_cameraPosX;
	const double	zk				= m_cameraPosY;
Oliver Bock's avatar
Oliver Bock committed
628
629
	const double	cam				= pow(xk, 2.0) + pow(yk, 2.0) + pow(zk, 2.0);
	const double	alpha			= deg2rad * (90.0 - m_mouseAngleH);
Oliver Bock's avatar
Oliver Bock committed
630
631
	const double	delta			= deg2rad * m_mouseAngleV;
	const double	gaussProfile	= 0.012337;
632
633
634

	for(int x = 0; x < 360; ++x) {
		// determine angle between pulsar's magnetic axis and line of sight
Oliver Bock's avatar
Oliver Bock committed
635
		phiOrb += deltaPhiOrb;
636
637
638
639
640
641
		const double phiRot = x * deltaPhiRot;

		double a = -sin(y) * sin(phiRot) * (xk + rp * cos(phiOrb)) \
				 + (cos(i) * sin(y) * cos(phiRot) + sin(i) * cos(y)) * (yk + rp * sin(phiOrb)) \
				 - (sin(i) * sin(y) * cos(phiRot) - cos(i) * cos(y)) * zk;

Oliver Bock's avatar
Oliver Bock committed
642
		double b = sqrt(pow(rp,2.0) + cam - (2.0 * sqrt(cam) * rp * cos(delta) * sin(alpha + phiOrb)));
643

Oliver Bock's avatar
Oliver Bock committed
644
645
		// determine and store pulse amplitude
		m_pulseProfile[x] = exp(-2.0 * (1.0 - fabs(a/b)) / gaussProfile);
646
647
648
649
650
	}

	// propagate new profile
	emit pulseProfileUpdated(m_pulseProfile);
}