Angles to vector

abakobo

hi and many thanks for the precise answers i received for the previous question!

while reading tutos on ruby/sketchup i kind of remember of an "angles to vector" method.. supposed it was in Geom but i found nothing similar in the api reference on http://www.sketchup.com/intl/en/developer/docs/ourdoc/geom.php. And i can't find the tuto anymore in the mess of my browser's history.

so my question is: is there any function/method like this or do i have to sine/cosine the angles myself.

grtz

Abakobo

TIG

vector1.angle_between(vector2)

result in radians...
See under 'Vector3d'...

abakobo

thanks! but this is vector to angle...

what i'm looking for is a method that ouputs a normalized Vector3d..
the arguments would be it's projection angle on xy plane and xz plane (with x axis).. actualy i already made a method with cos/sin myself but i'm afraid it will slowdown calculations when in loops and suppose a method from ruby/sketchup stds would be faster as i suppose it is in a lower level...

grtz

abakobo

TIG

There is no inbuilt method... but this will do it [flattened to Z-plane]

def flat_angle(vector)
	vec=Geom;;Vector3d.new(vector.x, vector.y, 0)
	if vec.y < 0
		return (2*Math;;PI)-(vec.angle_between(X_AXIS))
	elsif vec.y > 0
		return vec.angle_between(X_AXIS)
	elsif vec.y == 0
		if vec.samedirection?(X_AXIS)
			return 0
		else
			return Math;;PI
		end
	end
end

it's easy to make methods for X & Y planes - just adjust vec= to suit those other planes and adjust the tests from vec.y & _AXIS etc...