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2022-08-08 19:30:00 +08:00 · 2022-08-08 19:30:00 +08:00 · ba8d372c73
commit ba8d372c73
parent ab36720b8e
2 changed files with 7 additions and 0 deletions
--- a/a8/vec2.cc
+++ b/a8/vec2.cc
@ -118,4 +118,10 @@ namespace a8
    {
        return fabs(sqrt(x*x + y*y));
    }
+
+    bool Vec2::IsZero()
+    {
+        return fabs(x) < 0.00001f && fabs(y) < 0.00001f;
+    }
+
 }
--- a/a8/vec2.h
+++ b/a8/vec2.h
@ -26,6 +26,7 @@ namespace a8
        Vec2 Perp();
        float Dot(const Vec2& v) const;
        float Norm() const;
+        bool IsZero();

        static const Vec2 UP;
        static const Vec2 DOWN;