Posted By

martinB on 02/06/09

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Map world point to viewport coordinates

Published in: Maxscript

Original code by Borislav 'Bobo' Petrov

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(
	fn mapWorldToScreen thePoint =
	(
		local thePos = thePoint * viewport.getTM()
		local screenSize = getViewSize()
		local screen_origin = mapScreenToView [0,0] (thePos.z) screenSize
		local end_screen = mapScreenToView screenSize (thePos.z) screenSize
		local world_size = screen_origin-end_screen
		local x_aspect = screenSize.x/(abs world_size.x)
		local y_aspect = screenSize.y/(abs world_size.y)
		point3 (x_aspect*(thePos.x-screen_origin.x)) (-(y_aspect*(thePos.y-screen_origin.y))) 0
	)
 
-- now iterate over each selected object and display it's viewport position
	for theObj in selection do
	(
		gw.setTransform (matrix3 1)
		gw.wText (mapWorldToScreen theObj.pos) theObj.name color:green
	)
	gw.enlargeUpdateRect #whole
	gw.updateScreen()
)

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Posted By: martinB on February 16, 2009

An alternative method using the gw struct:

pos = object.pos gw.setTransform(Matrix3 1) screenpos = gw.wTranspoint pos

-- screenpos == [0,0] in the top-left corner

Posted By: trentf on February 7, 2010

how do you do the opposite?

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