custom-mesh-qml: example

Create a Mesh with buffers from QML with JS typed arrays

Change-Id: I7f774b311c944a5ef2e2174b0699c430758559f1
Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com>

4 files changed, 311 insertions, 0 deletions

diff --git a/examples/qt3d/custom-mesh-qml/custom-mesh-qml.pro b/examples/qt3d/custom-mesh-qml/custom-mesh-qml.pro
new file mode 100644
index 000000000..f87c7b1da
--- /dev/null
+++ b/examples/qt3d/custom-mesh-qml/custom-mesh-qml.pro
@@ -0,0 +1,11 @@
+!include( ../examples.pri ) {
+    error( "Couldn't find the examples.pri file!" )
+}
+
+QT += 3dcore 3drenderer 3dinput 3dquick quick
+
+SOURCES += \
+    main.cpp
+
+RESOURCES += \
+    custom-mesh-qml.qrc
diff --git a/examples/qt3d/custom-mesh-qml/custom-mesh-qml.qrc b/examples/qt3d/custom-mesh-qml/custom-mesh-qml.qrc
new file mode 100644
index 000000000..5f6483ac3
--- /dev/null
+++ b/examples/qt3d/custom-mesh-qml/custom-mesh-qml.qrc
@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/">
+        <file>main.qml</file>
+    </qresource>
+</RCC>
diff --git a/examples/qt3d/custom-mesh-qml/main.cpp b/examples/qt3d/custom-mesh-qml/main.cpp
new file mode 100644
index 000000000..e8d7a8565
--- /dev/null
+++ b/examples/qt3d/custom-mesh-qml/main.cpp
@@ -0,0 +1,63 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <window.h>
+#include <Qt3DRenderer/qrenderaspect.h>
+#include <Qt3DInput/QInputAspect>
+#include <Qt3DQuick/QQmlAspectEngine>
+
+#include <QGuiApplication>
+
+int main(int argc, char* argv[])
+{
+    QGuiApplication app(argc, argv);
+
+    Window view;
+    Qt3DCore::Quick::QQmlAspectEngine engine;
+
+    engine.aspectEngine()->registerAspect(new Qt3DRender::QRenderAspect());
+    engine.aspectEngine()->registerAspect(new Qt3DInput::QInputAspect());
+    engine.aspectEngine()->initialize();
+    QVariantMap data;
+    data.insert(QStringLiteral("surface"), QVariant::fromValue(static_cast<QSurface *>(&view)));
+    data.insert(QStringLiteral("eventSource"), QVariant::fromValue(&view));
+    engine.aspectEngine()->setData(data);
+    engine.setSource(QUrl("qrc:/main.qml"));
+
+    view.show();
+
+    return app.exec();
+}
diff --git a/examples/qt3d/custom-mesh-qml/main.qml b/examples/qt3d/custom-mesh-qml/main.qml
new file mode 100644
index 000000000..94f79c365
--- /dev/null
+++ b/examples/qt3d/custom-mesh-qml/main.qml
@@ -0,0 +1,232 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import Qt3D 2.0
+import Qt3D.Renderer 2.0
+import QtQuick 2.2 as QQ2
+
+Entity {
+    id: sceneRoot
+
+    Camera {
+        id: camera
+        projectionType: CameraLens.PerspectiveProjection
+        fieldOfView: 45
+        aspectRatio: 16/9
+        nearPlane : 0.1
+        farPlane : 1000.0
+        position: Qt.vector3d( 0.0, 0.0, -40.0 )
+        upVector: Qt.vector3d( 0.0, 1.0, 0.0 )
+        viewCenter: Qt.vector3d( 0.0, 0.0, 0.0 )
+    }
+
+    Configuration  {
+        controlledCamera: camera
+    }
+
+    components: [
+        FrameGraph {
+            activeFrameGraph: ForwardRenderer {
+                clearColor: Qt.rgba(0.5, 0.5, 1, 1)
+                camera: camera
+            }
+        }
+    ]
+
+    PerVertexColorMaterial {
+        id: material
+    }
+
+    function buildVertexBufferData()
+    {
+        // Vertices
+        var v0 = Qt.vector3d(-1.0, 0.0, -1.0)
+        var v1 = Qt.vector3d(1.0, 0.0, -1.0)
+        var v2 = Qt.vector3d(0.0, 1.0, 0.0)
+        var v3 = Qt.vector3d(0.0, 0.0, 1.0)
+
+        // Face Normals
+        function normal(v0, v1, v2) {
+            return v1.minus(v0).crossProduct(v2.minus(v0)).normalized();
+        }
+        var n023 = normal(v0, v2, v3)
+        var n012 = normal(v0, v1, v2)
+        var n310 = normal(v3, v1, v0)
+        var n132 = normal(v1, v3, v2)
+
+        // Vector normals
+        var n0 = n023.plus(n012).plus(n310).normalized()
+        var n1 = n132.plus(n012).plus(n310).normalized()
+        var n2 = n132.plus(n012).plus(n023).normalized()
+        var n3 = n132.plus(n310).plus(n023).normalized()
+
+        // Colors
+        var red = Qt.vector3d(1.0, 0.0, 0.0)
+        var green = Qt.vector3d(0.0, 1.0, 0.0)
+        var blue = Qt.vector3d(0.0, 0.0, 1.0)
+        var white = Qt.vector3d(1.0, 1.0, 1.0)
+
+        var vertices = [
+                    v0, n0, red,
+                    v1, n1, blue,
+                    v2, n2, green,
+                    v3, n3, white
+                ]
+
+        var vertexArray = new Float32Array(4 * (3 + 3 + 3));
+        var i = 0;
+
+        vertices.forEach(function(vec3) {
+            vertexArray[i++] = vec3.x;
+            vertexArray[i++] = vec3.y;
+            vertexArray[i++] = vec3.z;
+        });
+
+        return vertexArray;
+    }
+
+    function buildIndexBufferData()
+    {
+        var indexArray = new Uint16Array(12);
+
+        // Front
+        indexArray[0] = 0;
+        indexArray[1] = 1;
+        indexArray[2] = 2;
+        // Bottom
+        indexArray[3] = 3;
+        indexArray[4] = 1;
+        indexArray[5] = 0;
+        // Left
+        indexArray[6] = 0;
+        indexArray[7] = 2;
+        indexArray[8] = 3;
+        // Right
+        indexArray[9] = 1;
+        indexArray[10] = 3;
+        indexArray[11] = 2;
+
+        return indexArray;
+    }
+
+    GeometryRenderer {
+        id: customMesh
+        instanceCount: 1
+        baseVertex: 0
+        baseInstance: 0
+        primitiveType: GeometryRenderer.Triangles
+        Buffer {
+            id: vertexBuffer
+            type: Buffer.VertexBuffer
+            data: buildVertexBufferData()
+        }
+
+        Buffer {
+            id: indexBuffer
+            type: Buffer.IndexBuffer
+            data: buildIndexBufferData()
+        }
+        geometry:  Geometry {
+            Attribute {
+                attributeType: Attribute.VertexAttribute
+                dataType: Attribute.Float
+                dataSize: 3
+                byteOffset: 0
+                byteStride: 9 * 4
+                count: 4
+                name: defaultPositionAttributeName()
+                buffer: vertexBuffer
+            }
+
+            Attribute {
+                attributeType: Attribute.VertexAttribute
+                dataType: Attribute.Float
+                dataSize: 3
+                byteOffset: 3 * 4
+                byteStride: 9 * 4
+                count: 4
+                name: defaultNormalAttributeName()
+                buffer: vertexBuffer
+            }
+
+            Attribute {
+                attributeType: Attribute.VertexAttribute
+                dataType: Attribute.Float
+                dataSize: 3
+                byteOffset: 6 * 4
+                byteStride: 9 * 4
+                count: 4
+                name: defaultColorAttributeName()
+                buffer: vertexBuffer
+            }
+
+            Attribute {
+                attributeType: Attribute.IndexAttribute
+                dataType: Attribute.UnsignedShort
+                dataSize: 1
+                byteOffset: 0
+                byteStride: 0
+                count: 12
+                buffer: indexBuffer
+            }
+        }
+    }
+
+    Transform {
+        id: meshTransform
+        Scale { scale: 10 }
+        Rotate {
+            id: meshRotation
+            axis: Qt.vector3d(0, 1, 0)
+        }
+    }
+
+    QQ2.NumberAnimation {
+        target: meshRotation
+        property: "angle"
+        duration: 10000
+        from: 0
+        to: 360
+
+        loops: QQ2.Animation.Infinite
+        running: true
+    }
+
+    Entity {
+        id: sphereEntity
+        components: [ customMesh, material, meshTransform ]
+    }
+}