Animation support for Qt3D

Modded assimp loader to load animations and to load submeshes into child
entities. Added keyframeanimation for node animations and morphing mesh.
Also added animation group for controlling multiple nodes as one animation
and animation controller to select and play animations.

Assimp loader adds QKeyFrameAnimations targeting an entity as child
objects of that entity, the QAnimationController finds them when the entity
is set and creates QAnimationGroups from based on the animation name.

Change-Id: I7e2e7a4479af49f8023b4a359b2b3118efdaa0da
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 116 insertions, 0 deletions

diff --git a/src/extras/animations/qmorphinganimation.h b/src/extras/animations/qmorphinganimation.h
new file mode 100644
index 000000000..f8ca71ec9
--- /dev/null
+++ b/src/extras/animations/qmorphinganimation.h
@@ -0,0 +1,116 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3DEXTRAS_QMORPHINGANIMATION_H
+#define QT3DEXTRAS_QMORPHINGANIMATION_H
+
+#include <Qt3DRender/qgeometryrenderer.h>
+
+#include <Qt3DExtras/qabstractanimation.h>
+#include <Qt3DExtras/qmorphtarget.h>
+#include <Qt3DExtras/qt3dextras_global.h>
+
+#include <QtCore/qeasingcurve.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DExtras {
+
+class QMorphingAnimationPrivate;
+
+class QT3DEXTRASSHARED_EXPORT QMorphingAnimation : public QAbstractAnimation
+{
+    Q_OBJECT
+    Q_PROPERTY(QVector<float> targetPositions READ targetPositions WRITE setTargetPositions NOTIFY targetPositionsChanged)
+    Q_PROPERTY(float interpolator READ interpolator NOTIFY interpolatorChanged)
+    Q_PROPERTY(Qt3DRender::QGeometryRenderer *target READ target WRITE setTarget NOTIFY targetChanged)
+    Q_PROPERTY(QString targetName READ targetName WRITE setTargetName NOTIFY targetNameChanged)
+    Q_PROPERTY(QMorphingAnimation::Method method READ method WRITE setMethod NOTIFY methodChanged)
+    Q_PROPERTY(QEasingCurve::Type easing READ easing WRITE setEasing NOTIFY easingChanged)
+
+public:
+    enum Method
+    {
+        Normalized,
+        Relative
+    };
+    Q_ENUM(Method)
+
+    explicit QMorphingAnimation(QObject *parent = nullptr);
+
+    QVector<float> targetPositions() const;
+    float interpolator() const;
+    Qt3DRender::QGeometryRenderer *target() const;
+    QString targetName() const;
+    QMorphingAnimation::Method method() const;
+    QEasingCurve::Type easing() const;
+
+    void setMorphTargets(const QVector<Qt3DExtras::QMorphTarget *> &targets);
+    void addMorphTarget(Qt3DExtras::QMorphTarget *target);
+    void removeMorphTarget(Qt3DExtras::QMorphTarget *target);
+
+    void setWeights(int positionIndex, const QVector<float> &weights);
+    QVector<float> getWeights(int positionIndex);
+
+    QVector<Qt3DExtras::QMorphTarget *> morphTargetList();
+
+public Q_SLOTS:
+    void setTargetPositions(const QVector<float> &targetPositions);
+    void setTarget(Qt3DRender::QGeometryRenderer *target);
+    void setTargetName(const QString name);
+    void setMethod(QMorphingAnimation::Method method);
+    void setEasing(QEasingCurve::Type easing);
+
+Q_SIGNALS:
+    void targetPositionsChanged(const QVector<float> &targetPositions);
+    void interpolatorChanged(float interpolator);
+    void targetChanged(Qt3DRender::QGeometryRenderer *target);
+    void targetNameChanged(const QString &name);
+    void methodChanged(QMorphingAnimation::Method method);
+    void easingChanged(QEasingCurve::Type easing);
+
+private:
+
+    void updateAnimation(float position);
+
+    Q_DECLARE_PRIVATE(QMorphingAnimation)
+};
+
+} // Qt3DExtras
+
+QT_END_NAMESPACE
+
+#endif // QT3DEXTRAS_QMORPHINGANIMATION_H