Add transparency-qml-scene3d

Does the same thing as transparency-qml, allows to verify there's nothing
wrong with QtQuick 2 premultiplied alpha

Change-Id: Ia85a9759eace636e13d2e1b4a0e7f65fb96171e1
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

7 files changed, 365 insertions, 0 deletions

diff --git a/examples/qt3d/transparency-qml-scene3d/Scene.qml b/examples/qt3d/transparency-qml-scene3d/Scene.qml
new file mode 100644
index 000000000..d17f9e4b0
--- /dev/null
+++ b/examples/qt3d/transparency-qml-scene3d/Scene.qml
@@ -0,0 +1,186 @@
+/****************************************************************************
+**
+** 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: 800/600
+        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 { ForwardRenderer{ camera: camera; clearColor: Qt.rgba(0.0, 0.5, 1, 1) } }
+
+    TorusMesh {
+        id: torusMesh
+        radius: 5
+        minorRadius: 1
+        rings: 100
+        slices: 20
+    }
+
+    SphereMesh {
+        id: sphereMesh
+        radius: 3
+    }
+
+    Transform {
+        id: sphereTransform
+        Translate { dx: 10 }
+    }
+
+    Transform {
+        id: cylinderTransform
+        Translate { dx: -10 }
+    }
+
+    Entity {
+        id: torusEntity
+        components: [ torusMesh, phongMaterial ]
+    }
+
+    Entity {
+        id: sphereEntity
+        components: [ sphereMesh, alphaMaterial, sphereTransform ]
+    }
+
+    Entity {
+        id: cylinderEntity
+        components: [ sphereMesh, alphaMaterial, cylinderTransform ]
+    }
+
+    Material {
+        id: alphaMaterial
+
+        property real alpha: 0.5
+
+        QQ2.NumberAnimation {
+            duration: 2000
+            loops: QQ2.Animation.Infinite
+            target: alphaMaterial
+            property: "alpha"
+            from: 0.0
+            to: 1.0
+            running: true
+        }
+
+        effect:  Effect {
+            parameters: [
+                Parameter { name: "alpha";  value: alphaMaterial.alpha },
+                Parameter { name: "ka";   value: "black" },
+                Parameter { name: "kd";   value: "blue" },
+                Parameter { name: "ks";  value: "white" },
+                Parameter { name: "shininess"; value: 75.0 },
+                Parameter { name: "lightPosition"; value: Qt.vector4d(1.0, 1.0, 0.0, 1.0) },
+                Parameter { name: "lightIntensity"; value: Qt.vector3d(1.0, 1.0, 1.0) }
+            ]
+
+            ShaderProgram {
+                id: alphaPhong
+                vertexShaderCode: loadSource("qrc:/phongalpha.vert")
+                fragmentShaderCode: loadSource("qrc:/phongalpha.frag")
+            }
+
+            techniques: [
+                Technique
+                {
+                    openGLFilter {
+                        api: OpenGLFilter.Desktop
+                        profile: OpenGLFilter.None
+                        majorVersion: 2
+                        minorVersion: 0
+                    }
+
+                    renderPasses: RenderPass {
+                        renderStates: [
+                            CullFace { mode : CullFace.Back },
+                            DepthTest { func: DepthTest.Less },
+                            DepthMask { mask: false },
+                            BlendState {
+                                srcRGB: BlendState.SrcAlpha
+                                dstRGB: BlendState.OneMinusSrcAlpha
+                            }
+                            ,BlendEquation {mode: BlendEquation.FuncAdd}
+                        ]
+
+                        shaderProgram: alphaPhong
+                    }
+                },
+                Technique
+                {
+                    openGLFilter {
+                        api: OpenGLFilter.ES
+                        profile: OpenGLFilter.None
+                        majorVersion: 2
+                        minorVersion: 0
+                    }
+
+                    renderPasses: RenderPass {
+                        renderStates: [
+                            CullFace { mode : CullFace.Back },
+                            DepthTest { func: DepthTest.Less },
+                            DepthMask { mask: false },
+                            BlendState {
+                                srcRGB: BlendState.SrcAlpha
+                                dstRGB: BlendState.OneMinusSrcAlpha
+                            }
+                            ,BlendEquation {mode: BlendEquation.FuncAdd}
+                        ]
+
+                        shaderProgram: alphaPhong
+                    }
+                }
+            ]
+        }
+    }
+
+    PhongMaterial {
+        id: phongMaterial
+    }
+}
diff --git a/examples/qt3d/transparency-qml-scene3d/main.cpp b/examples/qt3d/transparency-qml-scene3d/main.cpp
new file mode 100644
index 000000000..e65092a5b
--- /dev/null
+++ b/examples/qt3d/transparency-qml-scene3d/main.cpp
@@ -0,0 +1,47 @@
+/****************************************************************************
+**
+** 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 <QGuiApplication>
+#include <QQmlApplicationEngine>
+
+int main(int argc, char *argv[])
+{
+    QGuiApplication app(argc, argv);
+    QQmlApplicationEngine engine;
+    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
+
+    return app.exec();
+}
diff --git a/examples/qt3d/transparency-qml-scene3d/main.qml b/examples/qt3d/transparency-qml-scene3d/main.qml
new file mode 100644
index 000000000..14b69a40a
--- /dev/null
+++ b/examples/qt3d/transparency-qml-scene3d/main.qml
@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** 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 QtQuick 2.4
+import QtQuick.Window 2.2
+import QtQuick.Scene3D 2.0
+
+Window
+{
+    visible: true
+    width: 800
+    height: 600
+
+    Scene3D {
+        id: scene3D
+        anchors.fill: parent
+        focus: true
+        aspects: "input"
+        Scene {}
+    }
+}
diff --git a/examples/qt3d/transparency-qml-scene3d/phongalpha.frag b/examples/qt3d/transparency-qml-scene3d/phongalpha.frag
new file mode 100644
index 000000000..b6b21fae4
--- /dev/null
+++ b/examples/qt3d/transparency-qml-scene3d/phongalpha.frag
@@ -0,0 +1,43 @@
+#define FP highp
+
+uniform FP vec4 lightPosition;
+uniform FP vec3 lightIntensity;
+
+// TODO: Replace with a struct
+uniform FP vec3 ka;            // Ambient reflectivity
+uniform FP vec3 kd;            // Diffuse reflectivity
+uniform FP vec3 ks;            // Specular reflectivity
+uniform FP float shininess;    // Specular shininess factor
+uniform float alpha;
+
+varying FP vec3 position;
+varying FP vec3 normal;
+
+FP vec3 adsModel( const FP vec3 pos, const FP vec3 n )
+{
+    // Calculate the vector from the light to the fragment
+    FP vec3 s = normalize( vec3( lightPosition ) - pos );
+
+    // Calculate the vector from the fragment to the eye position
+    // (origin since this is in "eye" or "camera" space)
+    FP vec3 v = normalize( -pos );
+
+    // Reflect the light beam using the normal at this fragment
+    FP vec3 r = reflect( -s, n );
+
+    // Calculate the diffuse component
+    FP float diffuse = max( dot( s, n ), 0.0 );
+
+    // Calculate the specular component
+    FP float specular = 0.0;
+    if ( dot( s, n ) > 0.0 )
+        specular = pow( max( dot( r, v ), 0.0 ), shininess );
+
+    // Combine the ambient, diffuse and specular contributions
+    return lightIntensity * ( ka + kd * diffuse + ks * specular );
+}
+
+void main()
+{
+        gl_FragColor = vec4( adsModel( position, normalize( normal ) ), alpha );
+}
diff --git a/examples/qt3d/transparency-qml-scene3d/phongalpha.vert b/examples/qt3d/transparency-qml-scene3d/phongalpha.vert
new file mode 100644
index 000000000..03a416213
--- /dev/null
+++ b/examples/qt3d/transparency-qml-scene3d/phongalpha.vert
@@ -0,0 +1,17 @@
+attribute vec3 vertexPosition;
+attribute vec3 vertexNormal;
+
+varying vec3 position;
+varying vec3 normal;
+
+uniform mat4 modelView;
+uniform mat3 modelViewNormal;
+uniform mat4 mvp;
+
+void main()
+{
+    normal = normalize( modelViewNormal * vertexNormal );
+    position = vec3( modelView * vec4( vertexPosition, 1.0 ) );
+
+    gl_Position = mvp * vec4( vertexPosition, 1.0 );
+}
diff --git a/examples/qt3d/transparency-qml-scene3d/transparency-qml-scene3d.pro b/examples/qt3d/transparency-qml-scene3d/transparency-qml-scene3d.pro
new file mode 100644
index 000000000..6762812ba
--- /dev/null
+++ b/examples/qt3d/transparency-qml-scene3d/transparency-qml-scene3d.pro
@@ -0,0 +1,10 @@
+!include( ../examples.pri ) {
+    error( "Couldn't find the examples.pri file!" )
+}
+
+QT += qml quick 3dcore 3drenderer 3dinput 3dquick
+
+SOURCES += main.cpp
+
+RESOURCES += transparency-qml-scene3d.qrc
+
diff --git a/examples/qt3d/transparency-qml-scene3d/transparency-qml-scene3d.qrc b/examples/qt3d/transparency-qml-scene3d/transparency-qml-scene3d.qrc
new file mode 100644
index 000000000..f590e2b96
--- /dev/null
+++ b/examples/qt3d/transparency-qml-scene3d/transparency-qml-scene3d.qrc
@@ -0,0 +1,8 @@
+<RCC>
+    <qresource prefix="/">
+        <file>main.qml</file>
+        <file>Scene.qml</file>
+        <file>phongalpha.vert</file>
+        <file>phongalpha.frag</file>
+    </qresource>
+</RCC>