OglViewerWidget.cpp 10.3 KB
Newer Older
1
#include "..\Header\OglViewerWidget.h"
Anakin's avatar
Anakin committed
2
#include "..\Header\MainWindow.h"
3
#include <QMouseEvent>
Anakin's avatar
Anakin committed
4 5
#include <QDropEvent>
#include <QMimeData>
6
#include <math.h>
Anakin's avatar
Anakin committed
7 8
#include <iostream>

Anakin's avatar
Anakin committed
9
#define DEFAULT_Z_DISTANCE -4.0
10

Anakin's avatar
Anakin committed
11 12 13 14

/////////////////////////////////////////////////////////////////////////
// public constructor/destructor

Anakin's avatar
Anakin committed
15 16 17 18
OglViewerWidget::OglViewerWidget(QWidget *parent)
	: QOpenGLWidget(parent)
	, m_dataEngine(0)
	, m_settings(new SettingsWindow(this))
19
{
20
	setFocus();
Anakin's avatar
Anakin committed
21
	m_translation.setZ(DEFAULT_Z_DISTANCE);
Anakin's avatar
Anakin committed
22
	setAcceptDrops(true);
Anakin's avatar
Anakin committed
23

24 25 26 27 28
	connect(m_settings, &SettingsWindow::updateBGColorOff, this, &OglViewerWidget::setBGColorOff);
	connect(m_settings, &SettingsWindow::updateBGColorOn, this, &OglViewerWidget::setBGColorOn);
	connect(m_settings, &SettingsWindow::updateLightColor, this, &OglViewerWidget::setLightColor);
	connect(m_settings, &SettingsWindow::updateAttFac, this, &OglViewerWidget::setAttFac);
	connect(m_settings, &SettingsWindow::updateAmbCoef, this, &OglViewerWidget::setAmbCoef);
29 30 31 32 33 34 35
}

OglViewerWidget::~OglViewerWidget()
{
	// Make sure the context is current when deleting the texture
	// and the buffers.
	makeCurrent();
Anakin's avatar
Anakin committed
36
	delete m_dataEngine;
37
	doneCurrent();
Anakin's avatar
Anakin committed
38 39

	delete m_settings;
40 41
}

Anakin's avatar
Anakin committed
42 43 44 45

/////////////////////////////////////////////////////////////////////////
// protected functions

46 47 48
void OglViewerWidget::mousePressEvent(QMouseEvent *e)
{
	// Save mouse press position
49 50 51 52 53 54 55
	m_mouse.position = QVector2D(e->localPos());

	// Which button has been pressed?
	if (e->button() == Qt::LeftButton)
		m_mouse.left = true;
	else if (e->button() == Qt::RightButton)
		m_mouse.right = true;
56 57 58 59
}

void OglViewerWidget::mouseReleaseEvent(QMouseEvent *e)
{
60 61 62 63 64
	if (e->button() == Qt::LeftButton)
		m_mouse.left = false;
	else if (e->button() == Qt::RightButton)
		m_mouse.right = false;
}
65

66 67 68 69 70 71
void OglViewerWidget::mouseMoveEvent(QMouseEvent *e)
{
	if (m_mouse.left)
	{
		// get the difference between last press and now
		QVector2D diff = QVector2D(e->localPos()) - m_mouse.position;
72

73 74
		// update the new position
		m_mouse.position = QVector2D(e->localPos());
75

76
		// calculate the rotation axis and rotate
Anakin's avatar
Anakin committed
77 78 79 80 81 82 83
		if (m_rotDirections.x && m_rotDirections.y && m_rotDirections.z)
		{
			m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(diff.y(), diff.x(), 0.0).normalized(), diff.length() * 0.5) * m_rotation;
		}
		else if (m_rotDirections.x && m_rotDirections.y && !m_rotDirections.z)
		{

Anakin's avatar
Anakin committed
84 85
			float pitch, yaw, roll;
			m_rotation.getEulerAngles(&pitch, &yaw, &roll);
Anakin's avatar
Anakin committed
86

Anakin's avatar
Anakin committed
87 88
			pitch += diff.y() * 0.5;
			yaw += diff.x() * 0.5;
Anakin's avatar
Anakin committed
89

Anakin's avatar
Anakin committed
90 91 92 93 94 95
			if (pitch > 89)
				pitch = 89;
			else if (pitch < -89)
				pitch = -89;

			m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
Anakin's avatar
Anakin committed
96 97 98 99 100 101 102 103 104 105 106 107 108 109

		}
		else if (m_rotDirections.x && !m_rotDirections.y && !m_rotDirections.z)
		{
			m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(0.0, 1.0, 0.0).normalized(), diff.x() * 0.5) * m_rotation;
		}
		else if (!m_rotDirections.x && m_rotDirections.y && !m_rotDirections.z)
		{
			m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(1.0, 0.0, 0.0).normalized(), diff.y() * 0.5) * m_rotation;
		}
		else if (!m_rotDirections.x && !m_rotDirections.y && m_rotDirections.z)
		{
			m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(0.0, 0.0, 1.0).normalized(), diff.x() * 0.5) * m_rotation;
		}
Anakin's avatar
Anakin committed
110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132
		else if (m_rotDirections.x && !m_rotDirections.y && m_rotDirections.z)
		{
			float pitch, yaw, roll;
			m_rotation.getEulerAngles(&pitch, &yaw, &roll);
			roll -= diff.y() * 0.5;
			yaw += diff.x() * 0.5;

			m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
		}
		else if (!m_rotDirections.x && m_rotDirections.y && m_rotDirections.z)
		{
			float pitch, yaw, roll;
			m_rotation.getEulerAngles(&pitch, &yaw, &roll);
			pitch += diff.y() * 0.5;
			roll += diff.x() * 0.5;

			if (pitch > 89)
				pitch = 89;
			else if (pitch < -89)
				pitch = -89;

			m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
		}
Anakin's avatar
Anakin committed
133 134

		
Anakin's avatar
Anakin committed
135 136 137 138 139 140 141 142 143 144 145 146 147 148
		// request an update
		update();
	}
	else if (m_mouse.right)
	{
		// get the difference between last press and now
		QVector2D diff = QVector2D(e->localPos()) - m_mouse.position;

		// update the new position
		m_mouse.position = QVector2D(e->localPos());

		// calculate the translation
		m_translation += {(float)(diff.x() * 0.01), (float)(diff.y() * -0.01), 0.0};

149 150 151
		// request an update
		update();
	}
152 153
}

Anakin's avatar
Anakin committed
154 155
void OglViewerWidget::wheelEvent(QWheelEvent *e)
{
Anakin's avatar
Anakin committed
156
	m_translation += {0.0, 0.0, (float)m_zSpeed * e->angleDelta().y() / 240};
Anakin's avatar
Anakin committed
157 158 159
	update();
}

Anakin's avatar
Anakin committed
160 161 162 163 164 165 166 167 168
void OglViewerWidget::dragEnterEvent(QDragEnterEvent *e)
{
	if (e->mimeData()->hasUrls())
		if(e->mimeData()->urls().size() == 1)
			if(e->mimeData()->urls().first().toLocalFile().endsWith(".msh"))
				e->acceptProposedAction();

}

Anakin's avatar
Anakin committed
169 170
void OglViewerWidget::dropEvent(QDropEvent * e)
{
Anakin's avatar
Anakin committed
171
	emit loadFile(e->mimeData()->urls().first().toLocalFile());
Anakin's avatar
Anakin committed
172 173
}

174
void OglViewerWidget::keyPressEvent(QKeyEvent *e)
175
{
176
	if (e->key() == Qt::Key_Space)
Anakin's avatar
Anakin committed
177
	{
Anakin's avatar
Anakin committed
178
		resetView();
Anakin's avatar
Anakin committed
179
	}
Anakin's avatar
Anakin committed
180 181 182 183
	else if (e->key() == Qt::Key_Escape)
	{
		parentWidget()->close();
	}
Anakin's avatar
Anakin committed
184 185 186 187 188
	else if (e->key() == Qt::Key_L)
	{
		updateLightPosition();
		update();
	}
Anakin's avatar
Anakin committed
189 190 191 192 193 194 195 196 197 198 199
	else if (e->key() == Qt::Key_Minus)
	{
		m_zSpeed -= 0.1;
		m_zSpeed < 0.09 ? m_zSpeed = 0 : NULL;
		emit sendMessage(QString("Zoom speed = %1%").arg(m_zSpeed * 100), 0);
	}
	else if (e->key() == Qt::Key_Plus)
	{
		m_zSpeed += 0.1;
		emit sendMessage(QString("Zoom speed = %1%").arg(m_zSpeed * 100), 0);
	}
200 201 202 203 204 205
}

void OglViewerWidget::initializeGL()
{
	initializeOpenGLFunctions();

206
	//glClearColor(0.5000f, 0.8000f, 1.0000f, 0.0000f);
207 208 209 210 211 212 213

	initShaders();

	// Enable depth buffer
	glEnable(GL_DEPTH_TEST);

	// Enable back face culling
Anakin's avatar
Anakin committed
214 215 216 217 218
	//glEnable(GL_CULL_FACE);

	// Enable transparency
	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
219

220 221
	m_dataEngine = new GeometryEngine(this);
	setConnections();
222 223 224 225 226 227 228 229
}

void OglViewerWidget::resizeGL(int w, int h)
{
	// Calculate aspect ratio
	qreal aspect = qreal(w) / qreal(h ? h : 1);

	// Set near plane to 3.0, far plane to 7.0, field of view 45 degrees
Anakin's avatar
Anakin committed
230
	const qreal zNear = 0.1, zFar = 100.0, fov = 45.0;
231 232

	// Reset projection
233
	m_projection.setToIdentity();
234 235

	// Set perspective projection
236
	m_projection.perspective(fov, aspect, zNear, zFar);
237 238 239 240
}

void OglViewerWidget::paintGL()
{
241
	if (m_lightOn && m_backgroundColorOn[3] == 1.0)
242
	{
243 244 245 246 247 248 249
		glClearColor(m_backgroundColorOn[0], m_backgroundColorOn[1], m_backgroundColorOn[2], 0.0000f);
		m_backgroundColorOn[3] = 0.0;
	}
	else if(!m_lightOn && m_backgroundColorOff[3] == 1.0)
	{
		glClearColor(m_backgroundColorOff[0], m_backgroundColorOff[1], m_backgroundColorOff[2], 0.0000f);
		m_backgroundColorOff[3] = 0.0;
250 251
	}

Anakin's avatar
Anakin committed
252 253 254
	// Clear color and depth buffer
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

255
	// Calculate model view transformation
Anakin's avatar
Anakin committed
256
	QMatrix4x4 view;
Anakin's avatar
Anakin committed
257
	view.translate(m_translation);
Anakin's avatar
Anakin committed
258
	view.rotate(m_rotation);
259

Anakin's avatar
Anakin committed
260 261
	// Set view-projection matrix
	m_program.setUniformValue("vp_matrix", m_projection * view);
262

263 264
	// Set Light values
	m_program.setUniformValue("b_light", m_lightOn);
Anakin's avatar
Anakin committed
265 266
	m_program.setUniformValue("light.position", m_light.position);
	m_program.setUniformValue("light.intensities", m_light.intensities);
Anakin's avatar
Anakin committed
267 268 269 270 271 272 273
	m_program.setUniformValue("light.attenuationFactor", m_light.attenuationFactor);
	m_program.setUniformValue("light.ambientCoefficient", m_light.ambientCoefficient);

	// Set camera position
	QMatrix4x4 rotateBack;
	rotateBack.rotate(m_rotation.inverted());
	m_program.setUniformValue("cameraPosition", rotateBack * (-m_translation));
Anakin's avatar
Anakin committed
274

275
	// Draw cube geometry
Anakin's avatar
Anakin committed
276
	m_dataEngine->drawGeometry(&m_program, m_wireframe);
277
}
Anakin's avatar
Anakin committed
278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301


/////////////////////////////////////////////////////////////////////////
// private functions

void OglViewerWidget::initShaders()
{
	// Compile vertex shader
	if (!m_program.addShaderFromSourceFile(QOpenGLShader::Vertex, ":/shaders/vshader.glsl"))
		close();

	// Compile fragment shader
	if (!m_program.addShaderFromSourceFile(QOpenGLShader::Fragment, ":/shaders/fshader.glsl"))
		close();

	// Link shader pipeline
	if (!m_program.link())
		close();

	// Bind shader pipeline for use
	if (!m_program.bind())
		close();
}

302 303 304
void OglViewerWidget::setConnections()
{
	connect(m_dataEngine, &GeometryEngine::requestResetView, this, &OglViewerWidget::resetView);
Anakin's avatar
Anakin committed
305 306
	connect(parentWidget(), SIGNAL(loadFile(QString)), m_dataEngine, SLOT(loadFile(QString)));
	connect(this, SIGNAL(loadFile(QString)), m_dataEngine, SLOT(loadFile(QString)));
Anakin's avatar
Anakin committed
307
	connect(m_dataEngine, SIGNAL(sendMessage(QString, int)), parentWidget(), SLOT(printMessage(QString, int)));
308
	connect(m_dataEngine, SIGNAL(requestUpdate()), this, SLOT(update()));
309
	connect(m_dataEngine, SIGNAL(sendFileInfo(QString, QVector<Material>*, int, int)), parentWidget(), SLOT(setFileInfo(QString, QVector<Material>*, int, int)));
Anakin's avatar
Anakin committed
310

311 312
}

Anakin's avatar
Anakin committed
313 314 315 316
void OglViewerWidget::updateLightPosition()
{
	QMatrix4x4 rotateBack;
	rotateBack.rotate(m_rotation.inverted());
Anakin's avatar
Anakin committed
317 318 319 320 321
	QVector3D cameraPosition = rotateBack * (-m_translation);

	m_light.position.setX(cameraPosition.x());
	m_light.position.setY(cameraPosition.y());
	m_light.position.setZ(cameraPosition.z());
Anakin's avatar
Anakin committed
322 323
}

Anakin's avatar
Anakin committed
324 325

/////////////////////////////////////////////////////////////////////////
Anakin's avatar
Anakin committed
326
// private slots
Anakin's avatar
Anakin committed
327

Anakin's avatar
Anakin committed
328
void OglViewerWidget::resetView()
Anakin's avatar
Anakin committed
329
{
Anakin's avatar
Anakin committed
330 331
	m_rotation = QQuaternion();
	m_translation = { 0.0, 0.0, DEFAULT_Z_DISTANCE };
Anakin's avatar
Anakin committed
332
	m_zSpeed = 1;
Anakin's avatar
Anakin committed
333 334
	update();
}
Anakin's avatar
Anakin committed
335 336 337 338 339 340 341


/////////////////////////////////////////////////////////////////////////
// public slots

void OglViewerWidget::changeDirection(int direction)
{
Anakin's avatar
Anakin committed
342 343 344 345 346 347 348 349 350 351 352 353
	switch (direction)
	{
	case 1:
		m_rotDirections.x = !m_rotDirections.x;
		break;
	case 2:
		m_rotDirections.y = !m_rotDirections.y;
		break;
	case 3:
		m_rotDirections.z = !m_rotDirections.z;
		break;
	}
Anakin's avatar
Anakin committed
354
}
Anakin's avatar
Anakin committed
355 356 357 358 359 360

void OglViewerWidget::toggleWireframe()
{
	m_wireframe = 1 - m_wireframe;
	update();
}
Anakin's avatar
Anakin committed
361 362 363 364 365 366 367

void OglViewerWidget::toggleLight()
{
	m_lightOn = 1 - m_lightOn;

	if (m_lightOn)
	{
368
		m_backgroundColorOn[3] = 1.0;
Anakin's avatar
Anakin committed
369 370 371 372
		updateLightPosition();
	}
	else
	{
373
		m_backgroundColorOff[3] = 1.0;
Anakin's avatar
Anakin committed
374 375 376
	}
	update();
}
Anakin's avatar
Anakin committed
377 378 379 380 381

void OglViewerWidget::showSettings()
{
	m_settings->show();
}
382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421

void OglViewerWidget::setBGColorOff(QVector3D value)
{
	m_backgroundColorOff = QVector4D(value / 255, 1.0f);

	if (!m_lightOn)
		update();
}

void OglViewerWidget::setBGColorOn(QVector3D value)
{
	m_backgroundColorOn = QVector4D(value / 255, 1.0f);

	if (m_lightOn)
		update();
}

void OglViewerWidget::setLightColor(QVector3D value)
{
	m_light.intensities = value / 255;

	if (m_lightOn)
		update();
}

void OglViewerWidget::setAttFac(double value)
{
	m_light.attenuationFactor = (float)value;

	if (m_lightOn)
		update();
}

void OglViewerWidget::setAmbCoef(double value)
{
	m_light.ambientCoefficient = (float)value;

	if (m_lightOn)
		update();
}