25#include <Qt3DCore/QTransform>
26#include <Qt3DRender/QMaterial>
27#include <Qt3DExtras/QPhongMaterial>
29#include <Qt3DExtras/QDiffuseMapMaterial>
30#include <Qt3DRender/QAbstractTextureImage>
31#include <Qt3DRender/QTexture>
33#include <Qt3DRender/QEffect>
34#include <Qt3DRender/QTechnique>
35#include <Qt3DRender/QCullFace>
36#include <Qt3DRender/QGeometryRenderer>
50class QgsPolygon3DSymbolHandler :
public QgsFeature3DHandler
55 , mSelectedIds( selectedIds ) {}
57 bool prepare(
const Qgs3DRenderContext &context, QSet<QString> &attributeNames )
override;
58 void processFeature(
const QgsFeature &f,
const Qgs3DRenderContext &context )
override;
59 void finalize( Qt3DCore::QEntity *parent,
const Qgs3DRenderContext &context )
override;
66 std::unique_ptr<QgsTessellator> tessellator;
67 QVector<QgsFeatureId> triangleIndexFids;
68 QVector<uint> triangleIndexStartingIndices;
69 QByteArray materialDataDefined;
72 void processPolygon(
QgsPolygon *polyClone,
QgsFeatureId fid,
float height,
float extrusionHeight,
const Qgs3DRenderContext &context, PolygonData &out );
73 void processMaterialDatadefined( uint verticesCount,
const QgsExpressionContext &context, PolygonData &out );
74 void makeEntity( Qt3DCore::QEntity *parent,
const Qgs3DRenderContext &context, PolygonData &out,
bool selected );
75 Qt3DRender::QMaterial *material(
const QgsPolygon3DSymbol *symbol,
bool isSelected,
const Qgs3DRenderContext &context )
const;
78 std::unique_ptr< QgsPolygon3DSymbol > mSymbol;
83 PolygonData outNormal;
84 PolygonData outSelected;
86 QgsLineVertexData outEdges;
90bool QgsPolygon3DSymbolHandler::prepare(
const Qgs3DRenderContext &context, QSet<QString> &attributeNames )
92 outEdges.withAdjacency =
true;
93 outEdges.init( mSymbol->altitudeClamping(), mSymbol->altitudeBinding(), 0, &context.map() );
97 outNormal.tessellator.reset(
new QgsTessellator( context.map().origin().x(), context.map().origin().y(),
true, mSymbol->invertNormals(), mSymbol->addBackFaces(),
false,
99 mSymbol->renderedFacade(),
100 texturedMaterialSettings ? texturedMaterialSettings->
textureRotation() : 0 ) );
101 outSelected.tessellator.reset(
new QgsTessellator( context.map().origin().x(), context.map().origin().y(),
true, mSymbol->invertNormals(),
102 mSymbol->addBackFaces(),
false,
104 mSymbol->renderedFacade(),
105 texturedMaterialSettings ? texturedMaterialSettings->
textureRotation() : 0 ) );
108 attributeNames.unite( attrs );
109 attrs = mSymbol->material()->dataDefinedProperties().referencedFields( context.expressionContext() );
110 attributeNames.unite( attrs );
114void QgsPolygon3DSymbolHandler::processPolygon(
QgsPolygon *polyClone,
QgsFeatureId fid,
float height,
float extrusionHeight,
const Qgs3DRenderContext &context, PolygonData &out )
116 const uint oldVerticesCount = out.tessellator->dataVerticesCount();
117 if ( mSymbol->edgesEnabled() )
124 if ( extrusionHeight )
128 outEdges.addLineString( *exterior, extrusionHeight + height );
129 outEdges.addVerticalLines( *exterior, extrusionHeight, height );
133 outEdges.addLineString( *interior, extrusionHeight + height );
134 outEdges.addVerticalLines( *interior, extrusionHeight, height );
141 Q_ASSERT( out.tessellator->dataVerticesCount() % 3 == 0 );
142 const uint startingTriangleIndex =
static_cast<uint
>( out.tessellator->dataVerticesCount() / 3 );
143 out.triangleIndexStartingIndices.append( startingTriangleIndex );
144 out.triangleIndexFids.append( fid );
145 out.tessellator->addPolygon( *polyClone, extrusionHeight );
148 if ( mSymbol->material()->dataDefinedProperties().hasActiveProperties() )
149 processMaterialDatadefined( out.tessellator->dataVerticesCount() - oldVerticesCount, context.expressionContext(), out );
152void QgsPolygon3DSymbolHandler::processMaterialDatadefined( uint verticesCount,
const QgsExpressionContext &context, QgsPolygon3DSymbolHandler::PolygonData &out )
154 const QByteArray bytes = mSymbol->material()->dataDefinedVertexColorsAsByte( context );
155 out.materialDataDefined.append( bytes.repeated( verticesCount ) );
158void QgsPolygon3DSymbolHandler::processFeature(
const QgsFeature &f,
const Qgs3DRenderContext &context )
163 PolygonData &out = mSelectedIds.contains( f.
id() ) ? outSelected : outNormal;
179 float height = mSymbol->height();
180 float extrusionHeight = mSymbol->extrusionHeight();
183 if ( hasDDExtrusion )
186 if (
const QgsPolygon *poly = qgsgeometry_cast< const QgsPolygon *>( g ) )
189 processPolygon( polyClone, f.
id(), height, extrusionHeight, context, out );
191 else if (
const QgsMultiPolygon *mpoly = qgsgeometry_cast< const QgsMultiPolygon *>( g ) )
193 for (
int i = 0; i < mpoly->numGeometries(); ++i )
196 processPolygon( polyClone, f.
id(), height, extrusionHeight, context, out );
201 for (
int i = 0; i < gc->numGeometries(); ++i )
207 processPolygon( polyClone, f.
id(), height, extrusionHeight, context, out );
212 qWarning() <<
"not a polygon";
217void QgsPolygon3DSymbolHandler::finalize( Qt3DCore::QEntity *parent,
const Qgs3DRenderContext &context )
220 makeEntity( parent, context, outNormal,
false );
221 makeEntity( parent, context, outSelected,
true );
223 mZMin = std::min( outNormal.tessellator->zMinimum(), outSelected.tessellator->zMinimum() );
224 mZMax = std::max( outNormal.tessellator->zMaximum(), outSelected.tessellator->zMaximum() );
227 if ( mSymbol->edgesEnabled() && !outEdges.indexes.isEmpty() )
229 QgsLineMaterial *mat =
new QgsLineMaterial;
230 mat->setLineColor( mSymbol->edgeColor() );
231 mat->setLineWidth( mSymbol->edgeWidth() );
233 Qt3DCore::QEntity *entity =
new Qt3DCore::QEntity;
236 Qt3DRender::QGeometryRenderer *renderer =
new Qt3DRender::QGeometryRenderer;
237 renderer->setPrimitiveType( Qt3DRender::QGeometryRenderer::LineStripAdjacency );
238 renderer->setGeometry( outEdges.createGeometry( entity ) );
239 renderer->setVertexCount( outEdges.indexes.count() );
240 renderer->setPrimitiveRestartEnabled(
true );
241 renderer->setRestartIndexValue( 0 );
244 entity->addComponent( renderer );
245 entity->addComponent( mat );
246 entity->setParent( parent );
251void QgsPolygon3DSymbolHandler::makeEntity( Qt3DCore::QEntity *parent,
const Qgs3DRenderContext &context, PolygonData &out,
bool selected )
253 if ( out.tessellator->dataVerticesCount() == 0 )
256 Qt3DRender::QMaterial *mat = material( mSymbol.get(), selected, context );
259 const QByteArray data( (
const char * )out.tessellator->data().constData(), out.tessellator->data().count() *
sizeof(
float ) );
260 const int nVerts = data.count() / out.tessellator->stride();
266 geometry->
setData( data, nVerts, out.triangleIndexFids, out.triangleIndexStartingIndices );
267 if ( mSymbol->material()->dataDefinedProperties().hasActiveProperties() )
268 mSymbol->material()->applyDataDefinedToGeometry( geometry, nVerts, out.materialDataDefined );
270 Qt3DRender::QGeometryRenderer *renderer =
new Qt3DRender::QGeometryRenderer;
271 renderer->setGeometry( geometry );
274 Qt3DCore::QEntity *entity =
new Qt3DCore::QEntity;
275 entity->addComponent( renderer );
276 entity->addComponent( mat );
277 entity->setParent( parent );
280 entity->findChild<Qt3DRender::QGeometryRenderer *>()->setObjectName( QStringLiteral(
"main" ) );
295 return Qt3DRender::QCullFace::NoCulling;
301 const auto techniques = material->effect()->techniques();
302 for (
auto tit = techniques.constBegin(); tit != techniques.constEnd(); ++tit )
304 auto renderPasses = ( *tit )->renderPasses();
305 for (
auto rpit = renderPasses.begin(); rpit != renderPasses.end(); ++rpit )
307 Qt3DRender::QCullFace *cullFace =
new Qt3DRender::QCullFace;
308 cullFace->setMode( _qt3DcullingMode( cullingMode ) );
309 ( *rpit )->addRenderState( cullFace );
314Qt3DRender::QMaterial *QgsPolygon3DSymbolHandler::material(
const QgsPolygon3DSymbol *symbol,
bool isSelected,
const Qgs3DRenderContext &context )
const
320 const bool dataDefined = mSymbol->material()->dataDefinedProperties().hasActiveProperties();
324 applyCullingMode( symbol->
cullingMode(), material );
332namespace Qgs3DSymbolImpl
339 if ( !polygonSymbol )
347 QgsFeature3DHandler *handler = handlerForPolygon3DSymbol( layer, &symbol );
348 Qt3DCore::QEntity *e = entityFromHandler( handler, map, layer );
CullingMode
Triangle culling mode.
@ FrontAndBack
Will not render anything.
@ NoCulling
Will render both front and back faces of triangles.
@ Front
Will render only back faces of triangles.
@ Back
Will render only front faces of triangles (recommended when input data are consistent)
static void clampAltitudes(QgsLineString *lineString, Qgis::AltitudeClamping altClamp, Qgis::AltitudeBinding altBind, const QgsPoint ¢roid, float height, const Qgs3DMapSettings &map)
Clamps altitude of vertices of a linestring according to the settings.
@ PropertyHeight
Height (altitude)
@ PropertyExtrusionHeight
Extrusion height (zero means no extrusion)
Abstract base class for all geometries.
virtual QgsAbstractGeometry * segmentize(double tolerance=M_PI/180., SegmentationToleranceType toleranceType=MaximumAngle) const
Returns a version of the geometry without curves.
virtual const QgsAbstractGeometry * simplifiedTypeRef() const SIP_HOLDGIL
Returns a reference to the simplest lossless representation of this geometry, e.g.
QgsWkbTypes::Type wkbType() const SIP_HOLDGIL
Returns the WKB type of the geometry.
virtual Qt3DRender::QMaterial * toMaterial(QgsMaterialSettingsRenderingTechnique technique, const QgsMaterialContext &context) const =0
Creates a new QMaterial object representing the material settings.
QgsPropertyCollection dataDefinedProperties() const
Returns the symbol material property collection, used for data defined overrides.
double valueAsDouble(int key, const QgsExpressionContext &context, double defaultValue=0.0, bool *ok=nullptr) const
Calculates the current value of the property with the specified key and interprets it as a double.
const QgsCurve * interiorRing(int i) const SIP_HOLDGIL
Retrieves an interior ring from the curve polygon.
const QgsCurve * exteriorRing() const SIP_HOLDGIL
Returns the curve polygon's exterior ring.
int numInteriorRings() const SIP_HOLDGIL
Returns the number of interior rings contained with the curve polygon.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
A geometry is the spatial representation of a feature.
const QgsAbstractGeometry * constGet() const SIP_HOLDGIL
Returns a non-modifiable (const) reference to the underlying abstract geometry primitive.
Line string geometry type, with support for z-dimension and m-values.
void setIsSelected(bool isSelected)
Sets whether the material should represent a selected state.
void setSelectionColor(const QColor &color)
Sets the color for representing materials in a selected state.
Multi polygon geometry collection.
bool requiresTextureCoordinates() const
Returns true if the material requires texture coordinates to be generated during triangulation....
float textureRotation() const
Returns the texture rotation, in degrees.
Qgs3DTypes::CullingMode cullingMode() const
Returns front/back culling mode.
QgsAbstractMaterialSettings * material() const
Returns material used for shading of the symbol.
QgsPolygon * clone() const override
Clones the geometry by performing a deep copy.
A grouped map of multiple QgsProperty objects, each referenced by a integer key value.
QSet< QString > referencedFields(const QgsExpressionContext &context=QgsExpressionContext(), bool ignoreContext=false) const override
Returns the set of any fields referenced by the active properties from the collection.
bool isActive(int key) const override
Returns true if the collection contains an active property with the specified key.
void setData(const QByteArray &vertexBufferData, int vertexCount, const QVector< QgsFeatureId > &triangleIndexFids, const QVector< uint > &triangleIndexStartingIndices)
Initializes vertex buffer (and other members) from data that were already tessellated.
Class that takes care of tessellation of polygons into triangles.
Represents a vector layer which manages a vector based data sets.
Q_INVOKABLE const QgsFeatureIds & selectedFeatureIds() const
Returns a list of the selected features IDs in this layer.
static bool isCurvedType(Type type) SIP_HOLDGIL
Returns true if the WKB type is a curved type or can contain curved geometries.
static Type flatType(Type type) SIP_HOLDGIL
Returns the flat type for a WKB type.
@ Triangles
Triangle based rendering (default)
@ TrianglesDataDefined
Triangle based rendering with possibility of datadefined color.
QSet< QgsFeatureId > QgsFeatureIds
qint64 QgsFeatureId
64 bit feature ids negative numbers are used for uncommitted/newly added features