[Closed] splitting a mesh based on a similar mesh

Just a wild shot pseudo code:

for i in “model I” objects)
{
create new mesh name = “segmentnr i”
for q in “model I”.mesh i.faces
{
for u in “model II faces”
{
if( raycast +/- intersect “model I”[i].face[q] “model II”.face[u] )
{
detach “model II”.face[u]
attach to “segmentnr i”
}
}
}
}

Thanks noontz.

 I tried filling out your pseudo code in steps..

        (1)	for i in "model I" objects    
        	create new mesh name = "segmentnr i"
        (2)	for q in "model I".mesh i.faces
        	{
        (3)	for u in "model II faces"
        	{
        (4)	if( raycast +/- intersect "model I"[i].face[q] "model  II".face[u] )
        	{
        (5)	detach "model II".face[u]
        	attach to "segmentnr i"
        	}
        	}
        	}
        	}
        

( 
         myTrack = $track 
         myObjects = $trackobj* as array
         faceCountII = myTrack.getnumfaces()		
         faceTestII = ((myTrack.getnumfaces()) != 0)	
         for Obj in myTrack do --(1)
        	(
        	local NewObject = undefined
        	convertToMesh NewObject
        	NewObject.name =  "_" + Obj.name	
        	faceCountI = Obj.getnumfaces()		
        	for q in 1 to faceCountI do	--(2)
        		(  
        		for u in 1 to faceCountII while faceTestII do --(3)
        		--(4)
        		)
        	 --(5)	 
        	)
         )

 I've been reading up on Intersectray, but haven't been able to figure out (4) & (5).  Can anyone help me out with those?

Thanks again.

Sorry for bumping my own thread, but I took another shot at it. I think I’m getting close but it’s giving me an arror (in [color=white]red[/color]). Does anyone know what I might have done wrong?

(
   myTrack = $track
   mySegments = $trackobj* as array
   faceCount_T = myTrack.getnumfaces()	  
   faceTest_T = ((myTrack.getnumfaces()) != 0)  
   	for i in mySegments do 
   	(
   	convertTo i (Editable_Poly)
   	local NewSegment = undefined
   	faceCount_S = i.getnumfaces()  
   		for q in 1 to faceCount_S do	
   		(
   		r=ray q.pos [0,0,-1]
   			for u in 1 to faceCount_T while faceTest_T do 
   			(
   				if(intersectray u r) != undefined then
   				(
   				polyOp.detachFaces MyTrack #{u} delete:true asNode:true name:"Face"
   					if NewSegment == undefined then
   						(
   						NewSegment = Face
   						convertTo NewSegment (Editable_Poly)
   						NewSegment.name =  "_" + i.name
   						)
   					else
   						attach NewSegment Face
   				)
   			)
   		)  
   	)
   )
   

faceCount_S = i.getnumfaces()
for q in 1 to faceCount_S do
(
r=ray q.pos [0,0,-1]

Firstly what is the error ?
but does q actually have a pos ? It looks to be derived from faceCount_S which will only return the amount of faces in a mesh not the actual face itself…(p.s I’m not a programmer )

Try replacing your error line with…

r = ray (polyop.getFaceCenter i q) [0, 0, -1]

Untested, as I don’t have Max in front of me, but it looks like it’ll work.

Cheers,

Drea

Thanks Andreas I changed that section of code and it’s not breaking there anymore. One last thing… I can’t figure out how to reference the face for the intersectray test. I tried defining it (red code) but I’m getting a “–No “convertTo” function for undefined” error. (in green)

(
    myTrack = $track
    mySegments = $trackobj* as array
    faceCount_T = myTrack.getnumfaces()	
    faceTest_T = ((myTrack.getnumfaces()) != 0)
    	for i in mySegments do
    	(
    	convertTo i (Editable_Poly)
    	local NewSegment = undefined
    	faceCount_S = i.getnumfaces()
    		for q in 1 to faceCount_S do 
    		(
    		r = ray (polyOp.getFaceCenter i q) [0, 0, -1]
    			for u in 1 to faceCount_T while faceTest_T do
    			(
    				polyOp.detachFaces MyTrack u delete:false asNode:true name:"tempFace"
    				local uSel = tempFace
    				convertTo uSel (Editable_Poly)
    
    				if(intersectray uSel r) != undefined then
    				(
    				polyOp.detachFaces MyTrack u delete:true asNode:true name:"Face"
    					if NewSegment == undefined then
    						(
    						NewSegment = Face
    						convertTo NewSegment (Editable_Poly)
    						NewSegment.name =  "_" + i.name
    						)
    					else
    						attach NewSegment Face
    				)
    			)
    		)
    	)
    )

Although slow, this worked:

Undo off ()
    myTrack = $track
    mySegments = $trackobj* as array
    faceCount_T = myTrack.getnumfaces()	 
    faceTest_T = ((myTrack.getnumfaces()) != 0) 
    with redraw off 
    	(
    	for i in mySegments do
    		(
    			convertTo i (Editable_Poly)
    			local NewSegment = undefined
    			for u = polyop.getNumFaces myTrack to 1 by -1 do 
    			(
    				r = ray (polyOp.getFaceCenter myTrack u) [0, 0, -1]
    				polyOp.detachFaces MyTrack #{u} delete:false asNode:true name:"tempFace"
    				local uSel = $tempFace
    				convertTo uSel (Editable_Poly)
    				if(intersectray i r) != undefined then
    				(
    					if NewSegment == undefined then
    						(
    						NewSegment = uSel
    						convertTo NewSegment (Editable_Poly)
    						NewSegment.name =  "_" + i.name
    						)
    					else
    						polyOp.attach NewSegment uSel
    				)
    				else delete uSel
    			)
    		) 
    	)

Hope somebody finds this useful…