[Closed] Manipulators Gismo Pos

Hi Merlin, I’m not sure to understand your issue, anyway you could try the following script. It keeps the offset while dragging the EditablePoly. The drawback is that bounding box max and min “change” as the node is rotated (try to see the effect). I hope this helps.

plugin simpleManipulator mc2ManipHandleTest
name:"test"
invisible:true
(
    local g = [0, 1, 0], r = [1, 0, 0]
    local gpos = #()

    on canManipulate target return (classOf target == Editable_Poly)

    on updateGizmos do
    (
        -- Clear the current gizmo cache
        this.clearGizmos()
          
        local bbox_size = node.max - node.min -- w l h
        
        --build bbox points from [0,0,0], center bottom and top
        local p0 = [0,0,0] --center
        local p1 = [0,0,-bbox_size.z/2] --bottom
        local p2 = [0,0,bbox_size.z/2] --top
          
        --manip zero is taken from node pivot, must be recalculated relative to BBox obj
--      p0 += node.pos --p0 *= node.pos
--      p1 += node.pos
--      p2 += node.pos
          
        --add result to an array for latest use
        gpos += #(p0,p1,p2)
          
        --create gismos
        this.addGizmoMarker #diamond p0 0 g r
        this.addGizmoMarker #HollowBox p1 0 g r
        this.addGizmoMarker #HollowBox p2 0 g r

        return "point"
    )
      
    on mouseUp m which do -- m = Point2 screen pixel coordinates, which is gismo number 
    (
        format "m:%	which:%	pickpoint:%
" m which gpos[which+1]
    )
)

• Enrico

Hi Enrico

Im apologize for my english , but you get it right

The problem is when the node is rotating…

what I must to do?
get the true size of bbox while is rotated (but how…)
or
create a new bouding box from vertices? (but how…)

Hi Merlin, don’t worry, your English is more than enough, and mine is far from perfect

You should get bounding box in local coordinates to be consistent with the node transformations. This should work as expected.

plugin simpleManipulator mc2ManipHandleTest
name:"test"
invisible:true
(
    local g = [0, 1, 0], r = [1, 0, 0]
    local gpos = #()

    on canManipulate target return (classOf target == Editable_Poly)

    on updateGizmos do
    (
        -- Clear the current gizmo cache
        this.clearGizmos()

        local localBBox = nodeGetBoundingBox node node.transform
        local bbox_size = localBBox[2] - localBBox[1] -- w l h

        --build bbox points from [0,0,0], center bottom and top
        local p0 = [0,0,bbox_size.z/2] --center
        local p1 = [0,0,0] --bottom
        local p2 = [0,0,bbox_size.z] --top

        --add result to an array for latest use
        gpos += #(p0,p1,p2)

        --create gismos
        this.addGizmoMarker #diamond p0 0 g r
        this.addGizmoMarker #HollowBox p1 0 g r
        this.addGizmoMarker #HollowBox p2 0 g r

        return "point"
    )

    on mouseUp m which do -- m = Point2 screen pixel coordinates, which is gismo number
    (
        format "m:%	which:%	pickpoint:%
" m which gpos[which+1]
    )
)

• Enrico

Yes Yes , thats it!

    local local_bbox = nodeGetBoundingBox node node.transform --min / max
    local bbox_size = local_bbox[2] - local_bbox[1] -- w l h

thank you Enrico

when one node is attached to another ,then gismos should be in the middle …
is not right ?

(
	--store and refresh Manipulators 
	local old_sel = selection as array
	local old_manip = manipulateMode
	manipulateMode = off  
	clearselection()
	manipulateMode = on
	select old_sel

	--action
	plugin simpleManipulator mc2PivotPlanter
	name:"mc2PivotPlanter"
	invisible:true
	(
		local g = [0, 1, 0], r = [1, 0, 0]
		local gpos = #(), local_bbox, bbox_size
		on canManipulate target return (classOf target == Editable_Poly)
		on updateGizmos do
		(
			-- Clear the current gizmo cache
			  this.clearGizmos()
			local local_bbox = nodeGetBoundingBox node node.transform
			local bbox_size = local_bbox[2] - local_bbox[1] -- w l h
			--build bbox points from [0,0,0], center, bottom and top
			local p0 = [0,0,bbox_size.z/2] --center
			local p1 = [0,0,0] --bottom
			local p2 = [0,0,bbox_size.z] --top
			gpos = #(p0,p1,p2)
			--create gismos
			this.addGizmoMarker #diamond p0 0 g r
			this.addGizmoMarker #HollowBox p1 0 g r
			this.addGizmoMarker #HollowBox p2 0 g r
	
			return "point"
		)
		  
		on mouseUp m which do -- m --> Point2 screen pixel coordinates, which --> gismo number 
		(
			format "m:%	which:%	local_pp:%
" m which gpos[which+1]
			undo "Pivot Plant" on in coordsys node.transform point pos:gpos[which+1]
		)
	)	
	--restore
	manipulateMode = old_manip
)

At first blush I’d say “yes, it is”, but with the current code the answer is “no, it isn’t”. I need to run some tests but I guess the issue is here:

local local_bbox = nodeGetBoundingBox node node.transform

To get the local Bounding Box, coordinates are transformed into local space using the Node transform matrix. When you attach a node to another, the transform matrix is not changed to the average of the two nodes.

I’m quite sure it can be solved, I’m going to give it a try.

• Enrico

How about using the actual center?
Only a box has the pivot point at the bottom, normal geometry doesn’t have to…

plugin simpleManipulator mc2ManipHandleTest
name:"test"
invisible:true
(
	local g = [0, 1, 0], r = [1, 0, 0]
	local gpos = #()

	on canManipulate target return (classOf target == Editable_Poly)

	on updateGizmos do
	(
		-- Clear the current gizmo cache
		this.clearGizmos()

		local localBBox = nodeGetBoundingBox node node.transform
		local localCenter = node.center * inverse node.transform
		local bbox_size = localBBox[2] - localBBox[1] -- w l h

		--build bbox points from [0,0,0], center bottom and top
		local p0 =localCenter --center
		local p1 = localCenter-[0,0,bbox_size.z/2] --bottom
		local p2 = localCenter+[0,0,bbox_size.z/2] --top

		--add result to an array for latest use
		gpos += #(p0,p1,p2)

		--create gismos
		this.addGizmoMarker #diamond p0 0 g r
		this.addGizmoMarker #HollowBox p1 0 g r
		this.addGizmoMarker #HollowBox p2 0 g r

		return "point"
	)

	on mouseUp m which do -- m = Point2 screen pixel coordinates, which is gismo number
	(
		format "m:%	which:%	pickpoint:%
" m which gpos[which+1]
	)
)

(
 --store and refresh Manipulators 
 local old_sel = selection as array
 local old_manip = manipulateMode
 manipulateMode = off  
 clearselection()
 manipulateMode = on
 select old_sel
 --action
 plugin simpleManipulator mc2PivotPlanter
 name:"mc2PivotPlanter"
 invisible:true
 (
  local g = [0, 1, 0], r = [1, 0, 0]
  local gpos = #(), local_bbox, bbox_size
  on canManipulate target return (classOf target == Editable_Poly)
  on updateGizmos do
  (
   -- Clear the current gizmo cache
   this.clearGizmos()
   -- manipulator's transform in nodes's LOCAL coord system 
   local local_bbox = nodeLocalBoundingBox node
   -- compensate not reset xform
   tm = node.objecttransform
   bmin = local_bbox[1]*(inverse tm) 
   bmax = local_bbox[2]*(inverse tm)
   
   local bbox_size = local_bbox[2] - local_bbox[1] -- w l h
   
   local center = (bmin + bmax)/2
   local p0 = center --center
   local p1 = [center.x,center.y,bmin.z] --bottom
   local p2 = [center.x,center.y,bmax.z] --top
   
   gpos = #(p0,p1,p2)
   --create gismos
   this.addGizmoMarker #diamond p0 0 g r
   this.addGizmoMarker #HollowBox p1 0 g r
   this.addGizmoMarker #HollowBox p2 0 g r
 
   return "point"
  )
	
  on mouseUp m which do -- m --> Point2 screen pixel coordinates, which --> gismo number 
  (
   format "m:%	which:%	local_pp:%
" m which gpos[which+1]
   undo "Pivot Plant" on in coordsys node.transform point pos:gpos[which+1]
  )
 ) 
 --restore
 manipulateMode = old_manip
)

Well, after all these, here’s mine too

(
    --store and refresh Manipulators
    local old_sel = selection as array
    local old_manip = manipulateMode
    manipulateMode = off
    clearselection()
    manipulateMode = on
    select old_sel

    --action
    plugin simpleManipulator mc2PivotPlanter
    name:"mc2PivotPlanter"
    invisible:true
    (
        local g = [0, 1, 0], r = [1, 0, 0]
        local gpos = #(), local_bbox, bbox_size
        on canManipulate target return (classOf target == Editable_Poly)
        on updateGizmos do
        (
            -- Clear the current gizmo cache
            this.clearGizmos()

            local local_bbox = nodeGetBoundingBox node node.transform
            local bbox_size = local_bbox[2] - local_bbox[1] -- w l h
            local bbox_center = local_bbox[1] + ((local_bbox[2] - local_bbox[1]) / 2)

            --build bbox points from [0,0,0], center, bottom and top
            local p0 = bbox_center --center
            local p1 = bbox_center - [0, 0, bbox_size.z/2] --bottom
            local p2 = bbox_center + [0, 0, bbox_size.z/2] --top

            gpos = #(p0,p1,p2)

            --create gismos
            this.addGizmoMarker #diamond p0 0 g r
            this.addGizmoMarker #HollowBox p1 0 g r
            this.addGizmoMarker #HollowBox p2 0 g r

            return "point"
        )

        on mouseUp m which do -- m --> Point2 screen pixel coordinates, which --> gismo number
        (
            format "m:%	which:%	local_pp:%
" m which gpos[which+1]
            undo "Pivot Plant" on in coordsys node.transform point pos:gpos[which+1]
        )
    )
    --restore
    manipulateMode = old_manip
)

• Enrico