Determine zoom level through API

[timc]

Is there a way to determine the zoom level through the Sketchup API?

I am trying to emulate the way the circle drawing tool displays a circle around the current mouse position. I can display a circle with ease, but the circle gets larger as I zoom in. I want the circle to remain the same size despite how far I zoom in or out.

Any help would be appreciated, Thanks.

[thomthom]

You drawing stuff on the viewport from a Tool? Or are you drawing geometry?

For drawing 2D stuff on the viewport you can use view.pixels_to_model http://code.google.com/apis/sketchup/docs/ourdoc/view.html#pixels_to_model

[TIG]

@timc said:

Is there a way to determine the zoom level through the Sketchup API?
I am trying to emulate the way the circle drawing tool displays a circle around the current mouse position. I can display a circle with ease, but the circle gets larger as I zoom in. I want the circle to remain the same size despite how far I zoom in or out.
Any help would be appreciated, Thanks.

Why zoom level ? This method draws a fixed size circle ??

def draw(view)
  ###make the circle data here, as an array of points, and them in view.draw_polyline(points) to make the circle...
end#def

[timc]

This is the code I'm using

#This is what I have in the draw method of my tool
def draw(view)
	#@temp = the current mouse location. it is set in the mousemove method.			
	@normal = view.camera.direction
	@pts_circle = circle_points(@temp.position, @normal, 10, 24)
	view.drawing_color = "blue"
	view.draw_polyline(@pts_circle)
end 

#This is a function I found that creates the points needed to draw a circle
def circle_points(center, normal, radius, numseg)
	# Get the x and y axes
	axes = Geom;;Vector3d.new(normal).axes
	xaxis = axes[0]
	yaxis = axes[1]
	zaxis = axes[2]
	    
	xaxis.length = radius
	yaxis.length = radius

	# compute the points
	da = (Math;;PI * 2) / numseg
	pts = []
	for i in 0..numseg do
		angle = i * da
		cosa = Math.cos(angle)
		sina = Math.sin(angle)
		vec = Geom;;Vector3d.linear_combination(cosa, xaxis, sina, yaxis)
		pts.push(center + vec)
	end
	    
	# close the circle
	pts.push(pts[0].clone)

	pts
end

If I use the mouse wheel to zoom while the tool is active the circle stays at a diameter of 10, so it appears larger if I zoom in and smaller if I zoom out.

[timc]

Thank you thomthom, that is exactly what I was looking for.