Add QtQuick3D module

Adding the module that contains a few C++ classes.
Adding the 'intro' example.
Adding the 'customgeometry' example as well.

Pick-to: 6.2
Fixes: PYSIDE-1708
Change-Id: I0681f087e74c13c024bb1dfa8de545b30f95d7d8
Reviewed-by: Christian Tismer <tismer@stackless.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 88 insertions, 0 deletions

diff --git a/examples/quick3d/customgeometry/examplepoint.py b/examples/quick3d/customgeometry/examplepoint.py
new file mode 100644
index 000000000..97c323ff6
--- /dev/null
+++ b/examples/quick3d/customgeometry/examplepoint.py
@@ -0,0 +1,88 @@
+#############################################################################
+##
+## Copyright (C) 2021 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the Qt for Python examples of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:BSD$
+## You may use this file under the terms of the BSD license as follows:
+##
+## "Redistribution and use in source and binary forms, with or without
+## modification, are permitted provided that the following conditions are
+## met:
+##   * Redistributions of source code must retain the above copyright
+##     notice, this list of conditions and the following disclaimer.
+##   * Redistributions in binary form must reproduce the above copyright
+##     notice, this list of conditions and the following disclaimer in
+##     the documentation and/or other materials provided with the
+##     distribution.
+##   * Neither the name of The Qt Company Ltd nor the names of its
+##     contributors may be used to endorse or promote products derived
+##     from this software without specific prior written permission.
+##
+##
+## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+import random
+
+import numpy as np
+from PySide6.QtGui import QVector3D
+from PySide6.QtQml import QmlElement
+from PySide6.QtQuick3D import QQuick3DGeometry
+
+QML_IMPORT_NAME = "ExamplePointGeometry"
+QML_IMPORT_MAJOR_VERSION = 1
+
+
+@QmlElement
+class ExamplePointGeometry(QQuick3DGeometry):
+    def __init__(self, parent=None):
+        QQuick3DGeometry.__init__(self, parent)
+        self.updateData()
+
+    def updateData(self):
+        self.clear()
+
+        # We use numpy arrays to handle the vertex data,
+        # but still we need to consider the 'sizeof(float)'
+        # from C to set the Stride, and Attributes for the
+        # underlying Qt methods
+        FLOAT_SIZE = 4
+        NUM_POINTS = 2000
+        stride = 3
+
+        vertexData = np.zeros(NUM_POINTS * stride, dtype=np.float32)
+
+        p = 0
+        for i in range(NUM_POINTS):
+            vertexData[p] = random.uniform(-5.0, +5.0)
+            p += 1
+            vertexData[p] = random.uniform(-5.0, +5.0)
+            p += 1
+            vertexData[p] = 0.0
+            p += 1
+
+        self.setVertexData(vertexData.tobytes())
+        self.setStride(stride * FLOAT_SIZE)
+        self.setBounds(QVector3D(-5.0, -5.0, 0.0), QVector3D(+5.0, +5.0, 0.0))
+
+        self.setPrimitiveType(QQuick3DGeometry.PrimitiveType.Points)
+
+        self.addAttribute(
+            QQuick3DGeometry.Attribute.PositionSemantic, 0, QQuick3DGeometry.Attribute.F32Type
+        )