Qt Quick 3D - Custom Geometry Example

 // Copyright (C) 2020 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

 #ifndef EXAMPLEGEOMETRY_H
 #define EXAMPLEGEOMETRY_H

 #include <QQuick3DGeometry>

 class ExampleTriangleGeometry : public QQuick3DGeometry
 {
     Q_OBJECT
     QML_NAMED_ELEMENT(ExampleTriangleGeometry)
     Q_PROPERTY(bool normals READ normals WRITE setNormals NOTIFY normalsChanged)
     Q_PROPERTY(float normalXY READ normalXY WRITE setNormalXY NOTIFY normalXYChanged)
     Q_PROPERTY(bool uv READ uv WRITE setUV NOTIFY uvChanged)
     Q_PROPERTY(float uvAdjust READ uvAdjust WRITE setUVAdjust NOTIFY uvAdjustChanged)

 public:
     ExampleTriangleGeometry();

     bool normals() const { return m_hasNormals; }
     void setNormals(bool enable);

     float normalXY() const { return m_normalXY; }
     void setNormalXY(float xy);

     bool uv() const { return m_hasUV; }
     void setUV(bool enable);

     float uvAdjust() const { return m_uvAdjust; }
     void setUVAdjust(float f);

 signals:
     void normalsChanged();
     void normalXYChanged();
     void uvChanged();
     void uvAdjustChanged();

 private:
     void updateData();

     bool m_hasNormals = false;
     float m_normalXY = 0.0f;
     bool m_hasUV = false;
     float m_uvAdjust = 0.0f;
 };

 class ExamplePointGeometry : public QQuick3DGeometry
 {
     Q_OBJECT
     QML_NAMED_ELEMENT(ExamplePointGeometry)

 public:
     ExamplePointGeometry();

 private:
     void updateData();
 };

 #endif