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288 lines (253 loc) · 12.7 KB
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#include "entities/axis.h"
#include "material.h"
#include "widget.h"
#include <Qt3DExtras/QCuboidMesh>
#include <Qt3DRender/QPointLight>
using namespace Mildred;
//! Creates the scene graph for the display.
/*!
* The Qt3D scene graph is created with the following layout.
*
* [RootEntity] Top-level root entity
* |
* sceneRootEntity_
* | |
* sceneRootTransform_ | Translates to distant rotation point and applies 3D view rotation
* |
* sceneObjectsEntity_ Contains all viewable objects for plotting
* | | |
* sceneObjectsTransform_ | | Places scene objects so that global 0,0,0 is lower left corner to the viewer
* | |
* axesEntity | Contains the individual AxesEntities
* | |
* xAxis_,yAxis_... | Individual axis entities
* |
* dataEntity Parent entity for all displayed data series
* | |
* dataOriginTransform_ * Sets the coordinate system so that 0,0,0 is at the axes origin
*/
void MildredWidget::createSceneGraph()
{
auto *lightEntity = new Qt3DCore::QEntity(rootEntity_.data());
auto *light = new Qt3DRender::QPointLight(lightEntity);
light->setColor("white");
light->setIntensity(1);
lightEntity->addComponent(light);
auto *lightTransform = new Qt3DCore::QTransform(lightEntity);
lightTransform->setTranslation(lightPosition_);
lightEntity->addComponent(lightTransform);
sceneRootEntity_ = new Qt3DCore::QEntity(rootEntity_.data());
sceneRootTransform_ = new Qt3DCore::QTransform(sceneRootEntity_);
sceneRootEntity_->addComponent(sceneRootTransform_);
auto *sceneObjectsEntity_ = new Qt3DCore::QEntity(sceneRootEntity_);
sceneObjectsTransform_ = new Qt3DCore::QTransform(sceneObjectsEntity_);
sceneObjectsEntity_->addComponent(sceneObjectsTransform_);
// Debug
sceneBoundingCuboidEntity_ = new Qt3DCore::QEntity(sceneRootEntity_);
sceneBoundingCuboidEntity_->setEnabled(false);
auto *cuboidMesh = new Qt3DExtras::QCuboidMesh(sceneBoundingCuboidEntity_);
sceneBoundingCuboidEntity_->addComponent(cuboidMesh);
sceneBoundingCuboidTransform_ = new Qt3DCore::QTransform(sceneBoundingCuboidEntity_);
sceneBoundingCuboidEntity_->addComponent(sceneBoundingCuboidTransform_);
auto *cuboidMaterial =
createMaterial(sceneBoundingCuboidEntity_, RenderableMaterial::VertexShaderType::Unclipped,
RenderableMaterial::GeometryShaderType::LineTesselator, RenderableMaterial::FragmentShaderType::Phong);
cuboidMaterial->setAmbient(QColor(255, 0, 0, 255));
sceneBoundingCuboidEntity_->addComponent(cuboidMaterial);
/*
* Axes Leaf
*/
auto *axesEntity = new Qt3DCore::QEntity(sceneObjectsEntity_);
auto *xAxisBarMaterial = createMaterial(axesEntity, RenderableMaterial::VertexShaderType::Unclipped,
RenderableMaterial::GeometryShaderType::LineTesselator,
RenderableMaterial::FragmentShaderType::Monochrome);
xAxisBarMaterial->setAmbient(QColor(0, 0, 0, 255));
auto *xAxisLabelMaterial =
createMaterial(axesEntity, RenderableMaterial::VertexShaderType::Unclipped,
RenderableMaterial::GeometryShaderType::None, RenderableMaterial::FragmentShaderType::Monochrome);
xAxisLabelMaterial->setAmbient(QColor(0, 0, 0, 255));
xAxis_ = new AxisEntity(axesEntity, AxisEntity::AxisType::Horizontal, metrics_, xAxisBarMaterial, xAxisLabelMaterial);
xAxis_->setTitleText("X");
connect(xAxis_, SIGNAL(enabledChanged(bool)), this, SLOT(updateMetrics()));
connect(xAxis_, SIGNAL(rangeChanged()), this, SLOT(updateMetrics()));
auto *yAxisBarMaterial = createMaterial(axesEntity, RenderableMaterial::VertexShaderType::Unclipped,
RenderableMaterial::GeometryShaderType::LineTesselator,
RenderableMaterial::FragmentShaderType::Monochrome);
yAxisBarMaterial->setAmbient(QColor(0, 0, 0, 255));
auto *yAxisLabelMaterial =
createMaterial(axesEntity, RenderableMaterial::VertexShaderType::Unclipped,
RenderableMaterial::GeometryShaderType::None, RenderableMaterial::FragmentShaderType::Monochrome);
yAxisLabelMaterial->setAmbient(QColor(0, 0, 0, 255));
yAxis_ = new AxisEntity(axesEntity, AxisEntity::AxisType::Vertical, metrics_, yAxisBarMaterial, yAxisLabelMaterial);
yAxis_->setTitleText("Y");
connect(yAxis_, SIGNAL(enabledChanged(bool)), this, SLOT(updateMetrics()));
connect(yAxis_, SIGNAL(rangeChanged()), this, SLOT(updateMetrics()));
auto *zAxisBarMaterial = createMaterial(axesEntity, RenderableMaterial::VertexShaderType::Unclipped,
RenderableMaterial::GeometryShaderType::LineTesselator,
RenderableMaterial::FragmentShaderType::Monochrome);
zAxisBarMaterial->setAmbient(QColor(0, 0, 0, 255));
auto *zAxisLabelMaterial =
createMaterial(axesEntity, RenderableMaterial::VertexShaderType::Unclipped,
RenderableMaterial::GeometryShaderType::None, RenderableMaterial::FragmentShaderType::Monochrome);
zAxisLabelMaterial->setAmbient(QColor(0, 0, 0, 255));
zAxis_ = new AxisEntity(axesEntity, AxisEntity::AxisType::Depth, metrics_, zAxisBarMaterial, zAxisLabelMaterial);
zAxis_->setTitleText("Z");
connect(zAxis_, SIGNAL(enabledChanged(bool)), this, SLOT(updateMetrics()));
connect(zAxis_, SIGNAL(rangeChanged()), this, SLOT(updateMetrics()));
zAxis_->setEnabled(false);
/*
* Data Space Leaf
*/
dataRootEntity_ = new Qt3DCore::QEntity(sceneObjectsEntity_);
dataEntityParent_ = new Qt3DCore::QEntity(dataRootEntity_);
dataOriginTransform_ = new Qt3DCore::QTransform(dataEntityParent_);
dataEntityParent_->addComponent(dataOriginTransform_);
// Create mouse coord entity
auto *mouseCoordLabelMaterial =
createMaterial(sceneObjectsEntity_, RenderableMaterial::VertexShaderType::Unclipped,
RenderableMaterial::GeometryShaderType::None, RenderableMaterial::FragmentShaderType::Monochrome);
mouseCoordLabelMaterial->setAmbient(QColor(0, 0, 0, 255));
mouseCoordEntity_ = new TextEntity(sceneObjectsEntity_, QString("0.0, 0.0"));
mouseCoordEntity_->setMaterial(mouseCoordLabelMaterial);
mouseCoordEntity_->setFont(QFont("monospace", 10.0));
mouseCoordEntity_->setAnchorPoint(MildredMetrics::AnchorPoint::BottomLeft);
mouseCoordEntity_->setEnabled(false);
}
//! Convert widget position to 2D (flat) coordinates
QPointF MildredWidget::toAxes2D(QPoint pos) const
{
return {xAxis_->fromScaled((pos.x() - width() / 2.0) - sceneObjectsTransform_->translation().x()),
yAxis_->fromScaled((pos.y() - height() / 2.0) - sceneObjectsTransform_->translation().y())};
}
//! Return screen coordinates at centre of 2D view
QPoint MildredWidget::screen2DCentre() const
{
return {int(width() / 2 + sceneObjectsTransform_->translation().x() + metrics_.displayVolumeExtent().x() / 2.0),
int(height() / 2 + sceneObjectsTransform_->translation().y() + metrics_.displayVolumeExtent().y() / 2.0)};
}
//! Return x axis entity
AxisEntity *MildredWidget::xAxis() { return xAxis_; }
//! Return y axis entity
AxisEntity *MildredWidget::yAxis() { return yAxis_; }
//! Return z axis entity
AxisEntity *MildredWidget::zAxis() { return zAxis_; }
//! Update transforms from metrics
/*!
* The metrics defined in the @class MildredMetrics object contains the offsets in 3D space for the axes origin and general
* graphing volume. This slot is connected internally to signals in the @class MildredMetrics object to ensure correct update of
* the view when the metrics have been recalculated.
*/
void MildredWidget::updateTransforms()
{
if (sceneObjectsTransform_)
sceneObjectsTransform_->setTranslation(metrics_.displayVolumeOrigin() -
QVector3D(width() / 2.0, height() / 2.0, -width() / 2.0));
if (dataOriginTransform_)
dataOriginTransform_->setTranslation(
-(xAxis_->toScaled(xAxis_->minimum()) + yAxis_->toScaled(yAxis_->minimum()) + zAxis_->toScaled(zAxis_->minimum())));
}
//! Update shader parameters
/*!
* Update shader parameters from current view information.
*/
void MildredWidget::updateShaderParameters()
{
sceneDataAxesParameter_->setValue(QMatrix4x4(xAxis_->direction().x(), xAxis_->direction().y(), xAxis_->direction().z(), 0.0,
yAxis_->direction().x(), yAxis_->direction().y(), yAxis_->direction().z(), 0.0,
zAxis_->direction().x(), zAxis_->direction().y(), zAxis_->direction().z(), 0.0,
0.0, 0.0, 0.0, 1.0));
sceneDataAxesExtentsParameter_->setValue(metrics_.displayVolumeExtent());
sceneDataAxesOriginParameter_->setValue(xAxis_->toScaled(xAxis_->minimum()) + yAxis_->toScaled(yAxis_->minimum()) +
zAxis_->toScaled(zAxis_->minimum()));
sceneDataTransformInverseParameter_->setValue(
(sceneRootTransform_->matrix() * sceneObjectsTransform_->matrix() * dataOriginTransform_->matrix()).inverted());
viewportSizeParameter_->setValue(QVector2D(width(), height()));
}
//! Reset view
/*!
* Resets the main scene view rotation to the identity matrix
*/
void MildredWidget::resetView()
{
assert(sceneRootTransform_);
viewRotationMatrix_ = QQuaternion();
sceneRootTransform_->setRotation(viewRotationMatrix_);
updateShaderParameters();
}
//! Show all data in view
/*!
* Reset axis limits to show all visible data
*/
void MildredWidget::showAllData()
{
Cuboid extrema, logarithmicExtrema;
for (auto &[name, entity] : dataEntities_)
{
// Don't adjust extents for hidden data
if (!entity->isEnabled())
continue;
extrema.expand(entity->extrema());
logarithmicExtrema.expand(entity->logarithmicExtrema());
}
// Overwrite linear with log extents for any log axes we have
if (xAxis_->isLogarithmic() && logarithmicExtrema.validXExtent())
extrema.setXExtent(pow(10.0, logarithmicExtrema.lowerLeftBack().x()),
pow(10.0, logarithmicExtrema.upperRightFront().x()));
if (yAxis_->isLogarithmic() && logarithmicExtrema.validYExtent())
extrema.setYExtent(pow(10.0, logarithmicExtrema.lowerLeftBack().y()),
pow(10.0, logarithmicExtrema.upperRightFront().y()));
if (zAxis_->isLogarithmic() && logarithmicExtrema.validZExtent())
extrema.setZExtent(pow(10.0, logarithmicExtrema.lowerLeftBack().z()),
pow(10.0, logarithmicExtrema.upperRightFront().z()));
// Don't allow zero range on any axis
// TODO Checking on absolute value is going to be unsuited to all eventualities
if (!extrema.validXExtent() || extrema.xExtent() < 1.0e-8)
extrema.expandX(1.0);
if (!extrema.validYExtent() || extrema.yExtent() < 1.0e-8)
extrema.expandY(1.0);
if (!extrema.validZExtent() || extrema.zExtent() < 1.0e-8)
extrema.expandZ(1.0);
xAxis_->setLimits(extrema.lowerLeftBack().x(), extrema.upperRightFront().x());
yAxis_->setLimits(extrema.lowerLeftBack().y(), extrema.upperRightFront().y());
zAxis_->setLimits(extrema.lowerLeftBack().z(), extrema.upperRightFront().z());
updateMetrics();
}
//! Change the text of the x-axis title.
/*!
* Set the displayed text of the x-axis title to @param title. Metrics are updated after the change.
*/
void MildredWidget::setXAxisTitle(const QString &title)
{
assert(xAxis_);
xAxis_->setTitleText(title);
updateMetrics();
}
//! Change the text of the y-axis title.
/*!
* Set the displayed text of the y-axis title to @param title. Metrics are updated after the change.
*/
void MildredWidget::setYAxisTitle(const QString &title)
{
assert(yAxis_);
yAxis_->setTitleText(title);
updateMetrics();
}
//! Change the text of the z-axis title.
/*!
* Set the displayed text of the z-axis title to @param title. Metrics are updated after the change.
*/
void MildredWidget::setZAxisTitle(const QString &title)
{
assert(zAxis_);
zAxis_->setTitleText(title);
updateMetrics();
}
//! Change the visibility of the scene debug cuboid.
/*!
* Sets whether the scene debug cuboid is enabled (visible), and which illustrates the current view volume extent.
*/
void MildredWidget::setSceneCuboidEnabled(bool enabled)
{
assert(sceneBoundingCuboidEntity_);
sceneBoundingCuboidEntity_->setEnabled(enabled);
}
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