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[xonotic/xonotic-data.pk3dir.git] / qcsrc / lib / vector.qh

diff --git a/qcsrc/lib/vector.qh b/qcsrc/lib/vector.qh
index de32d206f3b1f40235498f1914c7db66e2e6fd3c..6cbaebdcdb124aa7e18626b084902c8834394749 100644 (file)
--- a/qcsrc/lib/vector.qh
+++ b/qcsrc/lib/vector.qh
@@ -63,6 +63,21 @@ vector vec3(float x, float y, float z)
        return v;
 }
 
+vector rotate(vector v, float a)
+{
+       float a_sin = sin(a), a_cos = cos(a);
+       vector r = '0 0 0';
+       r.x =      v.x * a_cos + v.y * a_sin;
+       r.y = -1 * v.x * a_sin + v.y * a_cos;
+       return r;
+}
+
+vector yinvert(vector v)
+{
+       v.y = 1 - v.y;
+       return v;
+}
+
 #ifndef MENUQC
        vector get_corner_position(entity box, int corner)
        {