1 files changed, 73 insertions, 0 deletions
diff --git a/src/anim/LinearAnim.cpp b/src/anim/LinearAnim.cpp
new file mode 100644
index 0000000..7e34cfd
--- /dev/null
+++ b/src/anim/LinearAnim.cpp
@@ -0,0 +1,73 @@
+//
+//  libavg - Media Playback Engine. 
+//  Copyright (C) 2003-2014 Ulrich von Zadow
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+//  Current versions can be found at www.libavg.de
+//
+
+#include "LinearAnim.h"
+
+#include "../player/Player.h"
+
+using namespace boost::python;
+using namespace std;
+
+namespace avg {
+
+LinearAnim::LinearAnim(const object& node, const string& sAttrName, long long duration,
+            const object& startValue, const object& endValue, bool bUseInt, 
+            const object& startCallback, const object& stopCallback)
+    : SimpleAnim(node, sAttrName, duration, startValue, endValue, bUseInt, startCallback,
+            stopCallback)
+{
+}
+
+LinearAnim::~LinearAnim()
+{
+}
+
+float LinearAnim::interpolate(float t)
+{
+    return t;
+}
+
+float LinearAnim::getStartPart(float start, float end, float cur)
+{
+    return (cur-start)/(end-start);
+}
+
+AnimPtr fadeIn(const boost::python::object& node, long long duration, float max, 
+        const boost::python::object& stopCallback)
+{
+    object startVal = node.attr("opacity");
+    AnimPtr pAnim(new LinearAnim(node, "opacity", duration, startVal, 
+            object(max), false, object(), stopCallback));
+    pAnim->start(false);
+    return pAnim;
+}
+
+AnimPtr fadeOut(const boost::python::object& node, long long duration, 
+        const boost::python::object& stopCallback)
+{
+    object startVal = node.attr("opacity");
+    AnimPtr pAnim(new LinearAnim(node, "opacity", duration, startVal, 
+            object(0), false, object(), stopCallback));
+    pAnim->start(true);
+    return pAnim;
+}
+
+}