[Closed] Convert 3D coordinates to 2D

fn storeMeshPoints node range:animationrange =
(	
	local data = #()
	append data (getviewtm())
	append data range
	append data node

	point_data = #()
	for t = range.start to range.end by 1f do at time t
	(
		gw.setTransform (matrix3 1)
		mesh = snapshotasmesh node
		points = for v=1 to mesh.numverts collect
		(
			gw.hTransPoint (getvert mesh v)
		)
		append point_data points
		free mesh
	)
	append data point_data
)
/*
a = storeMeshPoints $
*/

it’s the basic idea. i hope it will help.

(just using pure MXS it’’s a pretty quick way to do these kind of things)

of course you can use projection matrix and multiply a 3D point on it, but hTransPoint is doing almost the same.

using of at time context doesn’t need redraw instead of shifting timeslider

at time context forces both camera and mesh validating (i hope that but i’ve not tested). so an animatable mesh deformation and camera transform has to be taken into account

Am actually only wanting to export an array of Point helpers rather than geometry points. Found code here that I think might work: http://www.scriptspot.com/bobo/mxs3/illusion/ . Not sure if this requires camera to be selected in viewport that has points to be exported.

Just in case added the following:

				
viewport.setCamera camera_out
displaySafeFrames = true

					in coordsys camera_out a = (pick_array[p].pos)
					zero_origin = mapScreenToView [0,0] (a.z) [renderwidth,renderheight]
					end_screen  = mapScreenToView [renderwidth,renderheight] (a.z) [renderwidth,renderheight]
					world_size = zero_origin-end_screen
					x_aspect = renderwidth/(abs world_size.x)
					y_aspect = renderheight/(abs world_size.y)
					a_screen = point2 (x_aspect*(a.x-zero_origin.x)) (abs(y_aspect*(a.y-zero_origin.y)))

Doesn’t BigMatrix allow for user defined matrices?

-Eric