292 lines
7.1 KiB
C++
292 lines
7.1 KiB
C++
#include "..\Header\OglViewerWidget.h"
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#include "..\Header\MainWindow.h"
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#include <QMouseEvent>
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#include <QDropEvent>
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#include <QMimeData>
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#include <math.h>
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#include <iostream>
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#define DEFAULT_Z_DISTANCE -4.0
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/////////////////////////////////////////////////////////////////////////
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// public constructor/destructor
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OglViewerWidget::OglViewerWidget(QWidget *parent) :
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QOpenGLWidget(parent),
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m_dataEngine(0)
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{
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setFocus();
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m_translation.setZ(DEFAULT_Z_DISTANCE);
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setAcceptDrops(true);
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}
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OglViewerWidget::~OglViewerWidget()
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{
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// Make sure the context is current when deleting the texture
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// and the buffers.
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makeCurrent();
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delete m_dataEngine;
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doneCurrent();
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}
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/////////////////////////////////////////////////////////////////////////
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// protected functions
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void OglViewerWidget::mousePressEvent(QMouseEvent *e)
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{
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// Save mouse press position
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m_mouse.position = QVector2D(e->localPos());
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// Which button has been pressed?
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if (e->button() == Qt::LeftButton)
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m_mouse.left = true;
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else if (e->button() == Qt::RightButton)
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m_mouse.right = true;
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}
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void OglViewerWidget::mouseReleaseEvent(QMouseEvent *e)
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{
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if (e->button() == Qt::LeftButton)
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m_mouse.left = false;
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else if (e->button() == Qt::RightButton)
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m_mouse.right = false;
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}
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void OglViewerWidget::mouseMoveEvent(QMouseEvent *e)
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{
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if (m_mouse.left)
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{
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// get the difference between last press and now
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QVector2D diff = QVector2D(e->localPos()) - m_mouse.position;
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// update the new position
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m_mouse.position = QVector2D(e->localPos());
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// calculate the rotation axis and rotate
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if (m_rotDirections.x && m_rotDirections.y && m_rotDirections.z)
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{
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m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(diff.y(), diff.x(), 0.0).normalized(), diff.length() * 0.5) * m_rotation;
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}
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else if (m_rotDirections.x && m_rotDirections.y && !m_rotDirections.z)
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{
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float pitch, yaw, roll;
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m_rotation.getEulerAngles(&pitch, &yaw, &roll);
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pitch += diff.y() * 0.5;
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yaw += diff.x() * 0.5;
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if (pitch > 89)
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pitch = 89;
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else if (pitch < -89)
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pitch = -89;
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m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
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}
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else if (m_rotDirections.x && !m_rotDirections.y && !m_rotDirections.z)
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{
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m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(0.0, 1.0, 0.0).normalized(), diff.x() * 0.5) * m_rotation;
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}
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else if (!m_rotDirections.x && m_rotDirections.y && !m_rotDirections.z)
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{
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m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(1.0, 0.0, 0.0).normalized(), diff.y() * 0.5) * m_rotation;
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}
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else if (!m_rotDirections.x && !m_rotDirections.y && m_rotDirections.z)
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{
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m_rotation = QQuaternion::fromAxisAndAngle(QVector3D(0.0, 0.0, 1.0).normalized(), diff.x() * 0.5) * m_rotation;
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}
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else if (m_rotDirections.x && !m_rotDirections.y && m_rotDirections.z)
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{
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float pitch, yaw, roll;
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m_rotation.getEulerAngles(&pitch, &yaw, &roll);
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roll -= diff.y() * 0.5;
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yaw += diff.x() * 0.5;
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m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
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}
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else if (!m_rotDirections.x && m_rotDirections.y && m_rotDirections.z)
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{
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float pitch, yaw, roll;
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m_rotation.getEulerAngles(&pitch, &yaw, &roll);
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pitch += diff.y() * 0.5;
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roll += diff.x() * 0.5;
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if (pitch > 89)
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pitch = 89;
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else if (pitch < -89)
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pitch = -89;
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m_rotation = QQuaternion::fromEulerAngles(pitch, yaw, roll);
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}
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// request an update
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update();
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}
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else if (m_mouse.right)
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{
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// get the difference between last press and now
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QVector2D diff = QVector2D(e->localPos()) - m_mouse.position;
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// update the new position
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m_mouse.position = QVector2D(e->localPos());
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// calculate the translation
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m_translation += {(float)(diff.x() * 0.01), (float)(diff.y() * -0.01), 0.0};
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// request an update
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update();
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}
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}
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void OglViewerWidget::wheelEvent(QWheelEvent *e)
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{
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m_translation += {0.0, 0.0, (float)e->angleDelta().y() / 240};
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update();
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}
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void OglViewerWidget::dragEnterEvent(QDragEnterEvent *e)
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{
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if (e->mimeData()->hasUrls())
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if(e->mimeData()->urls().size() == 1)
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if(e->mimeData()->urls().first().toLocalFile().endsWith(".msh"))
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e->acceptProposedAction();
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}
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void OglViewerWidget::dropEvent(QDropEvent * e)
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{
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emit loadFile(e->mimeData()->urls().first().toLocalFile());
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}
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void OglViewerWidget::keyPressEvent(QKeyEvent *e)
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{
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if (e->key() == Qt::Key_Space)
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{
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resetView();
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}
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else if (e->key() == Qt::Key_Escape)
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{
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parentWidget()->close();
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}
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}
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void OglViewerWidget::initializeGL()
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{
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initializeOpenGLFunctions();
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glClearColor(0.5000f, 0.8000f, 1.0000f, 0.0000f);
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initShaders();
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// Enable depth buffer
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glEnable(GL_DEPTH_TEST);
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// Enable back face culling
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glEnable(GL_CULL_FACE);
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m_dataEngine = new GeometryEngine(this);
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setConnections();
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}
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void OglViewerWidget::resizeGL(int w, int h)
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{
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// Calculate aspect ratio
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qreal aspect = qreal(w) / qreal(h ? h : 1);
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// Set near plane to 3.0, far plane to 7.0, field of view 45 degrees
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const qreal zNear = 0.1, zFar = 100.0, fov = 45.0;
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// Reset projection
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m_projection.setToIdentity();
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// Set perspective projection
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m_projection.perspective(fov, aspect, zNear, zFar);
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}
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void OglViewerWidget::paintGL()
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{
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// Clear color and depth buffer
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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// Calculate model view transformation
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QMatrix4x4 view;
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view.translate(m_translation);
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view.rotate(m_rotation);
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// Set view-projection matrix
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m_program.setUniformValue("vp_matrix", m_projection * view);
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// Draw cube geometry
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m_dataEngine->drawGeometry(&m_program);
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}
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/////////////////////////////////////////////////////////////////////////
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// private functions
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void OglViewerWidget::initShaders()
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{
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// Compile vertex shader
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if (!m_program.addShaderFromSourceFile(QOpenGLShader::Vertex, ":/shaders/vshader.glsl"))
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close();
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// Compile fragment shader
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if (!m_program.addShaderFromSourceFile(QOpenGLShader::Fragment, ":/shaders/fshader.glsl"))
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close();
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// Link shader pipeline
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if (!m_program.link())
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close();
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// Bind shader pipeline for use
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if (!m_program.bind())
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close();
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}
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void OglViewerWidget::setConnections()
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{
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connect(m_dataEngine, &GeometryEngine::requestResetView, this, &OglViewerWidget::resetView);
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connect(parentWidget(), SIGNAL(loadFile(QString)), m_dataEngine, SLOT(loadFile(QString)));
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connect(this, SIGNAL(loadFile(QString)), m_dataEngine, SLOT(loadFile(QString)));
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connect(m_dataEngine, SIGNAL(sendMessage(QString, int)), parentWidget(), SLOT(printMessage(QString, int)));
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connect(m_dataEngine, SIGNAL(requestUpdate()), this, SLOT(update()));
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connect(m_dataEngine, SIGNAL(sendFileInfo(QString, QStringList, int, int)), parentWidget(), SLOT(setFileInfo(QString, QStringList, int, int)));
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}
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/////////////////////////////////////////////////////////////////////////
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// private slots
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void OglViewerWidget::resetView()
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{
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m_rotation = QQuaternion();
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m_translation = { 0.0, 0.0, DEFAULT_Z_DISTANCE };
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update();
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}
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/////////////////////////////////////////////////////////////////////////
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// public slots
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void OglViewerWidget::changeDirection(int direction)
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{
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switch (direction)
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{
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case 1:
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m_rotDirections.x = !m_rotDirections.x;
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break;
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case 2:
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m_rotDirections.y = !m_rotDirections.y;
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break;
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case 3:
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m_rotDirections.z = !m_rotDirections.z;
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break;
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}
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}
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