From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 26 Aug 2019 11:53:21 +0000 (+0300)
Subject: Produce a linear animation curve if there's only one keyframe
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=a3c795f7b07afa3e8838ad143f8df7a8d10f1ad4

Produce a linear animation curve if there's only one keyframe

This can be useful for setting a constant value for the duration of an
animation, without needing to specify the value twice.
---

diff --git a/source/animation.cpp b/source/animation.cpp
index b1ae1157..94c96809 100644
--- a/source/animation.cpp
+++ b/source/animation.cpp
@@ -267,6 +267,14 @@ void Animation::create_curve(CurveTarget target, int component, const T &extract
 	while(n_control--)
 		knots.pop_back();
 
+	if(knots.size()==1)
+	{
+		knots.push_back(knots.back());
+		knots.push_back(knots.back());
+		knots.back().x += 1;
+		knots.push_back(knots.back());
+	}
+
 	curves.push_back(new ValueCurve<N>(target, component, knots));
 }