QgsTessellatedPolygonGeometry class

3 Class derived from Qt3DRender::QGeometry that represents polygons tessellated into 3D geometry.

Contents

Takes a list of polygons as input, internally it does tessellation and writes output to the internal vertex buffer. Optionally it can add "walls" if the extrusion height is non-zero.

Constructors, destructors, conversion operators

QgsTessellatedPolygonGeometry(QNode* parent = nullptr)
Constructor.

Public functions

auto addBackFaces() const -> bool
Returns whether also triangles facing the other side will be created.
auto invertNormals() const -> bool
Returns whether the normals of triangles will be inverted (useful for fixing clockwise / counter-clockwise face vertex orders)
void setAddBackFaces(bool add)
Sets whether also triangles facing the other side will be created.
void setInvertNormals(bool invert)
Sets whether the normals of triangles will be inverted (useful for fixing clockwise / counter-clockwise face vertex orders)
void setPolygons(const QList<QgsPolygon*>& polygons, const QList<QgsFeatureId>& featureIds, const QgsPointXY& origin, float extrusionHeight, const QList<float>& extrusionHeightPerPolygon = QList<float>())
Initializes vertex buffer from given polygons. Takes ownership of passed polygon geometries.
auto triangleIndexToFeatureId(uint triangleIndex) const -> QgsFeatureId
Returns ID of the feature to which given triangle index belongs (used for picking)

Function documentation

bool QgsTessellatedPolygonGeometry::addBackFaces() const

Returns whether also triangles facing the other side will be created.

Useful if input data have inconsistent order of vertices

void QgsTessellatedPolygonGeometry::setAddBackFaces(bool add)

Sets whether also triangles facing the other side will be created.

Useful if input data have inconsistent order of vertices