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Diffstat (limited to 'src/datavisualization/utils/camerahelper.cpp')
| -rw-r--r-- | src/datavisualization/utils/camerahelper.cpp | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/src/datavisualization/utils/camerahelper.cpp b/src/datavisualization/utils/camerahelper.cpp new file mode 100644 index 00000000..01de3f80 --- /dev/null +++ b/src/datavisualization/utils/camerahelper.cpp @@ -0,0 +1,286 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc +** All rights reserved. +** For any questions to Digia, please use contact form at http://qt.digia.com +** +** This file is part of the QtDataVisualization module. +** +** Licensees holding valid Qt Enterprise licenses may use this file in +** accordance with the Qt Enterprise License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. +** +** If you have questions regarding the use of this file, please use +** contact form at http://qt.digia.com +** +****************************************************************************/ + +#include "camerahelper_p.h" + +#include <qmath.h> +#include <QMatrix4x4> +#include <QVector3D> + +QT_DATAVISUALIZATION_BEGIN_NAMESPACE + +CameraHelper::CameraHelper(QObject *parent) : + QObject(parent), + m_position(0, 0.25, 3), + m_target(0, 0, 0), + m_up(0, 1, 0), + m_previousMousePos(0,0), + m_xRotation(0), + m_yRotation(0), + m_defaultXRotation(0), + m_defaultYRotation(0), + m_rotationSpeed(100) +{ +} + +CameraHelper::~CameraHelper() +{ +} + + +// FUNCTIONS +void CameraHelper::setRotationSpeed(int speed) +{ + // increase for faster rotation + m_rotationSpeed = speed; +} + +void CameraHelper::setCameraRotation(const QPointF &rotation) +{ + m_xRotation = rotation.x(); + m_defaultXRotation = m_xRotation; + m_yRotation = rotation.y(); + m_defaultYRotation = m_yRotation; +} + +void CameraHelper::setDefaultCameraOrientation(const QVector3D &defaultPosition, + const QVector3D &defaultTarget, + const QVector3D &defaultUp) +{ + m_position = defaultPosition; + m_target = defaultTarget; + m_up = defaultUp; +} + +QMatrix4x4 CameraHelper::calculateViewMatrix(const QPoint &mousePos, int zoom, + int screenWidth, int screenHeight, bool showUnder) +{ + QMatrix4x4 viewMatrix; + GLfloat lowerLimit = 0.0f; + + if (showUnder) + lowerLimit = -90.0f; + + // Calculate mouse movement since last frame + GLfloat mouseMoveX = GLfloat(m_previousMousePos.x() - mousePos.x()) + / (screenWidth / m_rotationSpeed); + GLfloat mouseMoveY = GLfloat(m_previousMousePos.y() - mousePos.y()) + / (screenHeight / m_rotationSpeed); + // Apply to rotations + m_xRotation -= mouseMoveX; + m_yRotation -= mouseMoveY; + // Reset at 360 in x and limit to 0...90 in y + if (qAbs(m_xRotation) >= 360.0f) + m_xRotation = 0.0f; + if (m_yRotation >= 90.0f) + m_yRotation = 90.0f; + else if (m_yRotation <= lowerLimit) + m_yRotation = lowerLimit; + + // Apply to view matrix + viewMatrix.lookAt(m_position, m_target, m_up); + // Compensate for translation (if m_target is off origin) + viewMatrix.translate(m_target.x(), m_target.y(), m_target.z()); + // Apply rotations + // Handle x and z rotation when y -angle is other than 0 + viewMatrix.rotate(m_xRotation, 0, qCos(qDegreesToRadians(m_yRotation)), + qSin(qDegreesToRadians(m_yRotation))); + // y rotation is always "clean" + viewMatrix.rotate(m_yRotation, 1.0f, 0.0f, 0.0f); + // handle zoom by scaling + viewMatrix.scale((GLfloat)zoom / 100.0f); + // Compensate for translation (if m_target is off origin) + viewMatrix.translate(-m_target.x(), -m_target.y(), -m_target.z()); + //qDebug() << m_xRotation << m_yRotation; + + m_previousMousePos = mousePos; + return viewMatrix; +} + +QVector3D CameraHelper::calculateLightPosition(const QVector3D &lightPosition, + GLfloat fixedRotation, GLfloat distanceModifier) +{ + // Move light with camera + QVector3D newLightPosition; + GLfloat radiusFactor = lightPosition.z() * (1.5f + distanceModifier); // for making sure light is outside the scene at its lowest point + GLfloat xAngle; + GLfloat yAngle; + if (!fixedRotation) { + xAngle = qDegreesToRadians(m_xRotation); + yAngle = qDegreesToRadians(m_yRotation); + } else { + xAngle = qDegreesToRadians(fixedRotation); + yAngle = 0; + } + GLfloat radius = (radiusFactor + lightPosition.y()); // set radius to match the highest height of the light + GLfloat zPos = radius * qCos(xAngle) * qCos(yAngle); + GLfloat xPos = radius * qSin(xAngle) * qCos(yAngle); + GLfloat yPos = (radiusFactor + lightPosition.y()) * qSin(yAngle); + // Keep light in the set position in relation to camera + newLightPosition = QVector3D(-xPos + lightPosition.x(), + yPos + lightPosition.y(), + zPos + lightPosition.z()); + //qDebug() << newLightPosition << xAngle << yAngle << fixedRotation; + return newLightPosition; +} + +void CameraHelper::updateMousePos(const QPoint &mousePos) +{ + m_previousMousePos = mousePos; + // if mouse position is set to (0, 0), reset rotations + if (QPoint(0, 0) == mousePos) { + m_xRotation = m_defaultXRotation; + m_yRotation = m_defaultYRotation; + } +} + +QPointF CameraHelper::getCameraRotations() +{ + QPointF rotations(m_xRotation, m_yRotation); + return rotations; +} + +void CameraHelper::setCameraPreset(QDataVis::CameraPreset preset) +{ + switch (preset) { + case QDataVis::PresetFrontLow: { + qDebug("PresetFrontLow"); + CameraHelper::setCameraRotation(QPointF(0.0f, 0.0f)); + break; + } + case QDataVis::PresetFront: { + qDebug("PresetFront"); + CameraHelper::setCameraRotation(QPointF(0.0f, 22.5f)); + break; + } + case QDataVis::PresetFrontHigh: { + qDebug("PresetFrontHigh"); + CameraHelper::setCameraRotation(QPointF(0.0f, 45.0f)); + break; + } + case QDataVis::PresetLeftLow: { + qDebug("PresetLeftLow"); + CameraHelper::setCameraRotation(QPointF(90.0f, 0.0f)); + break; + } + case QDataVis::PresetLeft: { + qDebug("PresetLeft"); + CameraHelper::setCameraRotation(QPointF(90.0f, 22.5f)); + break; + } + case QDataVis::PresetLeftHigh: { + qDebug("PresetLeftHigh"); + CameraHelper::setCameraRotation(QPointF(90.0f, 45.0f)); + break; + } + case QDataVis::PresetRightLow: { + qDebug("PresetRightLow"); + CameraHelper::setCameraRotation(QPointF(-90.0f, 0.0f)); + break; + } + case QDataVis::PresetRight: { + qDebug("PresetRight"); + CameraHelper::setCameraRotation(QPointF(-90.0f, 22.5f)); + break; + } + case QDataVis::PresetRightHigh: { + qDebug("PresetRightHigh"); + CameraHelper::setCameraRotation(QPointF(-90.0f, 45.0f)); + break; + } + case QDataVis::PresetBehindLow: { + qDebug("PresetBehindLow"); + CameraHelper::setCameraRotation(QPointF(180.0f, 0.0f)); + break; + } + case QDataVis::PresetBehind: { + qDebug("PresetBehind"); + CameraHelper::setCameraRotation(QPointF(180.0f, 22.5f)); + break; + } + case QDataVis::PresetBehindHigh: { + qDebug("PresetBehindHigh"); + CameraHelper::setCameraRotation(QPointF(180.0f, 45.0f)); + break; + } + case QDataVis::PresetIsometricLeft: { + qDebug("PresetIsometricLeft"); + CameraHelper::setCameraRotation(QPointF(45.0f, 22.5f)); + break; + } + case QDataVis::PresetIsometricLeftHigh: { + qDebug("PresetIsometricLeftHigh"); + CameraHelper::setCameraRotation(QPointF(45.0f, 45.0f)); + break; + } + case QDataVis::PresetIsometricRight: { + qDebug("PresetIsometricRight"); + CameraHelper::setCameraRotation(QPointF(-45.0f, 22.5f)); + break; + } + case QDataVis::PresetIsometricRightHigh: { + qDebug("PresetIsometricRightHigh"); + CameraHelper::setCameraRotation(QPointF(-45.0f, 45.0f)); + break; + } + case QDataVis::PresetDirectlyAbove: { + qDebug("PresetDirectlyAbove"); + CameraHelper::setCameraRotation(QPointF(0.0f, 90.0f)); + break; + } + case QDataVis::PresetDirectlyAboveCW45: { + qDebug("PresetDirectlyAboveCW45"); + CameraHelper::setCameraRotation(QPointF(-45.0f, 90.0f)); + break; + } + case QDataVis::PresetDirectlyAboveCCW45: { + qDebug("PresetDirectlyAboveCCW45"); + CameraHelper::setCameraRotation(QPointF(45.0f, 90.0f)); + break; + } + case QDataVis::PresetFrontBelow: { + qDebug("PresetFrontBelow"); + CameraHelper::setCameraRotation(QPointF(0.0f, -45.0f)); + break; + } + case QDataVis::PresetLeftBelow: { + qDebug("PresetLeftBelow"); + CameraHelper::setCameraRotation(QPointF(90.0f, -45.0f)); + break; + } + case QDataVis::PresetRightBelow: { + qDebug("PresetRightBelow"); + CameraHelper::setCameraRotation(QPointF(-90.0f, -45.0f)); + break; + } + case QDataVis::PresetBehindBelow: { + qDebug("PresetBehindBelow"); + CameraHelper::setCameraRotation(QPointF(180.0f, -45.0f)); + break; + } + case QDataVis::PresetDirectlyBelow: { + qDebug("PresetDirectlyBelow"); + CameraHelper::setCameraRotation(QPointF(0.0f, -90.0f)); + break; + } + default: + break; + } +} + +QT_DATAVISUALIZATION_END_NAMESPACE |