Method getRK4StartAngle

src/Graphwar/Function.java:311–343

(double x, double y, double radius)

	}
	
	private double getRK4StartAngle(double x, double y, double radius)
	{
		double angle = 0;
		double startAngleTangent;		
		double finalX;
		double finalY;
		double error = 10000;
		for(int i=0; error > Constants.ANGLE_ERROR && i<Constants.MAX_ANGLE_LOOPS; i++)
		{
			finalX = x + radius*Math.cos(angle);
			finalY = y + radius*Math.sin(angle);
			
			double tempStepSize = Constants.STEP_SIZE;
			
			double k1 = polishFunc.evaluateFunction( finalX, finalY, 0);
			double k2 = polishFunc.evaluateFunction( finalX + 0.5*tempStepSize, finalY + 0.5*tempStepSize*k1, 0);
			double k3 = polishFunc.evaluateFunction( finalX + 0.5*tempStepSize, finalY + 0.5*tempStepSize*k2, 0);
			double k4 = polishFunc.evaluateFunction( finalX + tempStepSize, finalY + tempStepSize*k3, 0);
				
			double nextY = finalY + (tempStepSize/6)*(k1 + 2*k2 + 2*k3 + k4);
			double nextX = finalX + tempStepSize;
						
			startAngleTangent = (nextY-finalY)/(nextX-finalX);
			
			double newAngle = Math.atan(startAngleTangent);
			
			error = Math.abs(newAngle - angle);
				
			angle = newAngle;
		}		
		
		return angle;
	}
	
	public void processRK4Range(Obstacle obstacle, Player players[], int numPlayers, int currentTurn, boolean inverted)
	{