1 files changed, 101 insertions, 0 deletions
diff --git a/examples/opengl/hellogl2/logo.py b/examples/opengl/hellogl2/logo.py
new file mode 100644
index 000000000..c236a1ec9
--- /dev/null
+++ b/examples/opengl/hellogl2/logo.py
@@ -0,0 +1,101 @@
+# Copyright (C) 2023 The Qt Company Ltd.
+# Copyright (C) 2013 Riverbank Computing Limited.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+import math
+
+from PySide6.QtGui import (QVector3D, QVector3DList)
+
+
+class Logo():
+    def __init__(self):
+        self.m_data = QVector3DList()
+        self.m_data.reserve(5000)
+
+        x1 = +0.06
+        y1 = -0.14
+        x2 = +0.14
+        y2 = -0.06
+        x3 = +0.08
+        y3 = +0.00
+        x4 = +0.30
+        y4 = +0.22
+
+        self.quad(x1, y1, x2, y2, y2, x2, y1, x1)
+        self.quad(x3, y3, x4, y4, y4, x4, y3, x3)
+
+        self.extrude(x1, y1, x2, y2)
+        self.extrude(x2, y2, y2, x2)
+        self.extrude(y2, x2, y1, x1)
+        self.extrude(y1, x1, x1, y1)
+        self.extrude(x3, y3, x4, y4)
+        self.extrude(x4, y4, y4, x4)
+        self.extrude(y4, x4, y3, x3)
+
+        NUM_SECTORS = 100
+
+        for i in range(NUM_SECTORS):
+            angle = (i * 2 * math.pi) / NUM_SECTORS
+            x5 = 0.30 * math.sin(angle)
+            y5 = 0.30 * math.cos(angle)
+            x6 = 0.20 * math.sin(angle)
+            y6 = 0.20 * math.cos(angle)
+
+            angle = ((i + 1) * 2 * math.pi) / NUM_SECTORS
+            x7 = 0.20 * math.sin(angle)
+            y7 = 0.20 * math.cos(angle)
+            x8 = 0.30 * math.sin(angle)
+            y8 = 0.30 * math.cos(angle)
+
+            self.quad(x5, y5, x6, y6, x7, y7, x8, y8)
+
+            self.extrude(x6, y6, x7, y7)
+            self.extrude(x8, y8, x5, y5)
+
+    def const_data(self):
+        return self.m_data.constData()
+
+    def count(self):
+        return len(self.m_data) * 3
+
+    def vertex_count(self):
+        return self.count() / 6
+
+    def quad(self, x1, y1, x2, y2, x3, y3, x4, y4):
+        n = QVector3D.normal(QVector3D(x4 - x1, y4 - y1, 0),
+                             QVector3D(x2 - x1, y2 - y1, 0))
+
+        self.add(QVector3D(x1, y1, -0.05), n)
+        self.add(QVector3D(x4, y4, -0.05), n)
+        self.add(QVector3D(x2, y2, -0.05), n)
+
+        self.add(QVector3D(x3, y3, -0.05), n)
+        self.add(QVector3D(x2, y2, -0.05), n)
+        self.add(QVector3D(x4, y4, -0.05), n)
+
+        n = QVector3D.normal(QVector3D(x1 - x4, y1 - y4, 0),
+                             QVector3D(x2 - x4, y2 - y4, 0))
+
+        self.add(QVector3D(x4, y4, 0.05), n)
+        self.add(QVector3D(x1, y1, 0.05), n)
+        self.add(QVector3D(x2, y2, 0.05), n)
+
+        self.add(QVector3D(x2, y2, 0.05), n)
+        self.add(QVector3D(x3, y3, 0.05), n)
+        self.add(QVector3D(x4, y4, 0.05), n)
+
+    def extrude(self, x1, y1, x2, y2):
+        n = QVector3D.normal(QVector3D(0, 0, -0.1),
+                             QVector3D(x2 - x1, y2 - y1, 0))
+
+        self.add(QVector3D(x1, y1, 0.05), n)
+        self.add(QVector3D(x1, y1, -0.05), n)
+        self.add(QVector3D(x2, y2, 0.05), n)
+
+        self.add(QVector3D(x2, y2, -0.05), n)
+        self.add(QVector3D(x2, y2, 0.05), n)
+        self.add(QVector3D(x1, y1, -0.05), n)
+
+    def add(self, v, n):
+        self.m_data.append(v)
+        self.m_data.append(n)