1 files changed, 42 insertions, 0 deletions

diff --git a/src/General.h b/src/General.h
index 41bdf5d7..fd78edaa 100644
--- a/src/General.h
+++ b/src/General.h
@@ -40,6 +40,48 @@ public:
 		}
 	}
 
+	static float LimitRadianAngle(float angle)
+	{
+		if (angle < -25.0f)
+			angle = -25.0f;
+
+		if (angle > 25.0f)
+			angle = 25.0f;
+
+		float result = angle;
+
+		while (result >= PI) {
+			result -= 2 * PI;
+		}
+
+		while (result < -PI) {
+			result += 2 * PI;
+		}
+	
+		return result;
+	}
+
+	static float GetRadianAngleBetweenPoints(float x1, float y1, float x2, float y2)
+	{
+		float x = x2 - x1;
+		float y = y2 - y1;
+
+		if (y == 0.0f)
+			y = 0.0001f;
+
+		if (x > 0.0f) {
+			if (y > 0.0f)
+				return 2 * PI - atan2(x / y, 1.0f);
+			else
+				return -atan2(x / y, 1.0f);
+		} else {
+			if (y > 0.0f)
+				return -(PI + atan2(x / y, 1.0f));
+			else
+				return -atan2(x / y, 1.0f);
+		}
+	}
+
 	// not too sure about all these...
 	static uint16 GetRandomNumber(void)
 		{ return myrand() & 0xFFFF; }