Conform Script - Point Projection on Surface seems to work strange

Submitted by EliderDeli on Mon, 2018-05-28 01:43

Hi Guys, I allready got a great support from the Forum!!! Im working on a Conform Script right know which I plan to use as a modifier. The Problem at the moment ist that the Plane Projection creates strange placing of my vertices. Basicly I search for the three enarest Vertices fro every vertice in my Object. Then I make a Point Projection on theSurface.

fn checkNearestEdge SelectedVerticeID =
(
oV = SelectedVerticeID.pos
pairs = for o in refObj.selectedVerts collect #(length(o.pos-oV), o.index ) --pairs distance and vertexpos
qsort pairs sortByDist --indexes and sorts

x0 = polyop.getVert refObj pairs[1][2]
x1 = polyop.getVert refObj pairs[2][2]
x2 = polyop.getVert refObj pairs[3][2]

offset = 0.01

x0 = x0 + [0,0,offset]
x1 = x1 + [0,0,offset]
x2 = x2 + [0,0,offset]

print "go"
print SelectedVerticeID.pos
print x0
print x1
print x2
newVert = pointPlaneProj x2 x1 x0 SelectedVerticeID.pos
moveVertices SelectedVerticeID.index newVert
)

-------------------------

fn pointPlaneProj pA pB pC pD = (
local nABC=normalize (cross (pB-pA) (pC-pA))
newPoint = pD+((dot (pA-pD) nABC)*nABC)
return newPoint
)

General Scripting

Comments

Submitted by EliderDeli on Tue, 2018-05-29 07:19.

Okay wow tested it and no

Okay wow tested it and no matter if my works its so much slower.... thanks a lot

Submitted by jahman on Mon, 2018-05-28 02:31.

.

I guess you can use MeshProjIntersect for that purpose

Submitted by EliderDeli on Tue, 2018-05-29 00:28.

Thanks you very much. But i

Thanks you very much. But i was trying to do it with the manuel Projection do u have any idears to that? Greetings

Submitted by jahman on Tue, 2018-05-29 01:38.

.

I don't quite understand what end result you're trying to achieve, sorry.

(
	delete objects
	delete helpers
 
	r = 20
	g = GeoSphere radius:r segments:2
	convertToMesh g
 
	points = for i=1 to 10 collect (
 
		pt = (normalize (random -[1.0,1.0,1.0] [1.0,1.0,1.0])) * r * 1.5
		point pos:pt centermarker:on cross:off wirecolor:yellow
		pt
 
	)
 
	mpi = MeshProjIntersect()
	mpi.setNode g
	mpi.build()
 
	for pt in points do (
 
		hit = mpi.ClosestFace pt
 
		if hit do (
 
			point pos:(mpi.GetHitPos()) centermarker:on cross:off wirecolor:red
 
		)
 
	)
)

Submitted by EliderDeli on Tue, 2018-05-29 06:03.

No Problem :D is my fault. Im

No Problem :D is my fault. Im making a Point on Surface projection with every Vertice to the three nearest Vertices of an Reference Mesh. So In theory if u have the Three Vertices u can create a Face and Project the Vertice on the shortest path onto this Face. So every Vertice should snap to the nearest point of a reference Mesh.
Greeting Eli

Submitted by jahman on Tue, 2018-05-29 06:40.

.

So isn't my example above (using MPI) doing exactly what you need? It creates red point helpers at the closest point on mesh.
Or maybe you need to place projected verts onto closest vert (not point on face)?

Submitted by EliderDeli on Mon, 2018-06-04 05:04.

Hi jahman thanks for your

Hi jahman thanks for your help till know. Maybe you hava an IDear hwo I could Confm my Mesh without converting it to editable_poly? I would like to build a script which conforms Vertices created thorugh a subdivison Modifer (Withouth collapsing it). Greetings EliderDeli

Submitted by jahman on Mon, 2018-06-04 06:36.

.

I guess simpleMod is your only option.
Google "simpleMod saddle" example

Submitted by EliderDeli on Tue, 2018-06-05 02:07.

Thank you very much ,again

Thank you very much ,again :). I will have a look at it

Submitted by EliderDeli on Tue, 2018-05-29 06:45.

No it does exactly what I

No it does exactly what I need (Thanks a lot for that). Im only unsure why my code doesnt work and would be realyy interested where i made a mistake (it works but not for all vertices but iterate through all and checked at multiple parts in the script if the values are right).

x0 = polyop.getVert refObj pairs[1][2]
x1 = polyop.getVert refObj pairs[2][2]
x2 = polyop.getVert refObj pairs[3][2]

xoffset = 0.00
yoffset = 0.00
zoffset = 0.00

x0 = x0 + [xoffset,yoffset ,zoffset]
x1 = x1 + [xoffset,yoffset ,zoffset]
x2 = x2 + [xoffset,yoffset ,zoffset]

moveVertices SelectedVerticeID.index (pointPlaneProj x2 x1 x0 SelectedVerticeID.pos)
)

fn pointPlaneProj pA pB pC pD =
(
local nABC=normalize (cross (pB-pA) (pC-pA))
newPoint = pD+((dot (pA-pD) nABC)*nABC)
return newPoint
)

move just moves and works

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