From: Rudolf Polzer <divverent@xonotic.org>
Date: Sat, 1 Mar 2014 11:32:37 +0000 (+0100)
Subject: For convenience, provide bezier curve functions globally.
X-Git-Tag: xonotic-v0.8.0~227
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=3183071eda8d27f485ed9d2395d353b3b58fbad1;p=xonotic%2Fxonotic-data.pk3dir.git

For convenience, provide bezier curve functions globally.
---

diff --git a/qcsrc/common/util.qc b/qcsrc/common/util.qc
index bdf80e5d1..c50a3ba53 100644
--- a/qcsrc/common/util.qc
+++ b/qcsrc/common/util.qc
@@ -2789,3 +2789,18 @@ float Mod_Q1BSP_NativeContentsFromSuperContents(float supercontents)
 	return CONTENT_EMPTY;
 }
 #endif
+
+vector bezier_quadratic_getpoint(vector a, vector b, vector c, float t)
+{
+	return
+		(c - 2 * b + a) * (t * t) +
+		(b - a) * (2 * t) +
+		a;
+}
+
+vector bezier_quadratic_getderivative(vector a, vector b, vector c, float t)
+{
+	return
+		(c - 2 * b + a) * (2 * t) +
+		(b - a) * 2;
+}
diff --git a/qcsrc/common/util.qh b/qcsrc/common/util.qh
index 820f4f5db..503aa2d2a 100644
--- a/qcsrc/common/util.qh
+++ b/qcsrc/common/util.qh
@@ -441,3 +441,7 @@ float Announcer_PickNumber(float type, float num);
 float Mod_Q1BSP_SuperContentsFromNativeContents(float nativecontents);
 float Mod_Q1BSP_NativeContentsFromSuperContents(float supercontents);
 #endif
+
+// Quadratic splines (bezier)
+vector bezier_quadratic_getpoint(vector a, vector p, vector b, float t);
+vector bezier_quadratic_getderivative(vector a, vector p, vector b, float t);