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Bug 373479

Summary:	Vector.getAngle(Vector) sometimes returns "Nan" instead of "180"
Product:	[Tools] GEF	Reporter:	Ivan Lelekov <ivanl_builds>
Component:	GEF-Legacy Draw2d	Assignee:	Alexander Nyßen <nyssen>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	nyssen
Version:	3.7.1
Target Milestone:	3.8.0 (Juno)
Hardware:	PC
OS:	Windows 7
Whiteboard:

Description Ivan Lelekov

2012-03-07 03:56:22 EST

Next pease of code Outputs "Nan" instead of "180"

  Vector a = new Vector( 24.03809869102058,-6.868028197434448);
  Vector b = new Vector(-24.038098691020593,6.868028197434448);
  System.out.println(a.getAngle(b));

Comment 1 Alexander Nyßen

2012-03-11 12:32:45 EDT

This was caused by rounding effects. Changed implementation to handle values outside the [-1, 1] range. Resolving as fixed in 3.8M6.