hindukush

Hi everybody i'm stuck orienting light copies to the point onto i scatter. Can anybody tell me what is wrong with this opiece of code? for pt in scatterGeo.points(): euler = pt.findPointAttrib(“N”) dir = hou.Vector3((0,1,0)) * hou.hmath.buildRotate(euler) instances.parm('rx').setAttributeValue('N ',dir[0] ) I think there are some basic python stuff error in there:-)

Maibe adding something like this? dirx: euler = hou.parmTuple("r").eval() dir = hou.Vector3((0,1,0)) * hou.hmath.buildRotate(euler) return dir[0] diry: euler = hou.parmTuple("r").eval() dir = hou.Vector3((0,1,0)) * hou.hmath.buildRotate(euler) return dir[1] dirz: euler = hou.parmTuple("r").eval() dir = hou.Vector3((0,1,0)) * hou.hmath.buildRotate(euler) return dir[2]

Hi everybody, i'm facing issues orienting Arnold lights copy to points normal.I'm actually using this .hda (https://www.artstation.com/artwork/zA3BVd) But no chance to get orientation.I should get the point normal and convert to degrees for the light. Can anybody point me in the right direction? Anyone knows a better way to copy arnold lights to points? Thank you sooo much! Carlo The python script that is used is : from math import sqrt def destroyInstance(kwargs): # Define Variable node = kwargs['node'] try: scatterNodePath = node.parm('scatterPath').eval() scatterNode = hou.node(scatterNodePath) scatterGeo = scatterNode.geometry() except: hou.ui.displayMessage('I can\'t find the scatter node "' + scatterNodePath + '" !') exit() scatterNodePath = node.parm('scatterPath').eval() scatterNode = hou.node(scatterNodePath) scatterGeo = scatterNode.geometry() instanceName = node.parm('instanceName').eval() # Instance Loop try: for pt in scatterGeo.points(): nameInstance = instanceName + '_' + str(pt.number()) instances = hou.node('/obj/' + nameInstance) instances.destroy() hou.item('/obj/networkInst').destroy() hou.item('/obj/networkMain').destroy() except: pass def createInstance(kwargs): node = kwargs['node'] # Define Variable try: scatterNodePath = node.parm('scatterPath').eval() scatterNode = hou.node(scatterNodePath) scatterGeo = scatterNode.geometry() except: hou.ui.displayMessage('I can\'t find the scatter node "' + scatterNodePath + '" !') exit() try: instanceNodeName = node.parm('nameNode').eval() test = hou.node('/obj/').createNode(instanceNodeName, "test") test.destroy() except: hou.ui.displayMessage('The name of node "' + instanceNodeName + '" doesn\'t exist ! ') exit() linkPosPts = node.parm('linkPosPts').eval() instanceName = node.parm('instanceName').eval() linkAttribPt = node.parm('linkAttribPt').eval().split() copyPtAttribValue = node.parm('copyPtAttribValue').eval().split() linkParmFirstInstance = node.parm('linkParmFirstInstance').eval().split() revertParmValue = node.parm('revertParmValue').eval().split() parmList = revertParmValue + linkParmFirstInstance + copyPtAttribValue +linkAttribPt attribList = linkAttribPt + copyPtAttribValue # Instance Loop for pt in scatterGeo.points(): # Create Light nameInstance = instanceName + '_' + str(pt.number()) try: test = hou.node('/obj/' + nameInstance).name() networkBoxMain = hou.node('/obj/' + 'networkMain') instances = hou.node('/obj/' + nameInstance) firstRun = 0 except: # Create Node firstRun = 1 instances = hou.node('/obj/').createNode(instanceNodeName, nameInstance) #TEST if nameInstance == instanceName + '_0': for p in parmList: try: instances.parm(p).eval() except: hou.ui.displayMessage('The parameter "' + p + '" doesn\'t exit !') if(firstRun == 1): instances.destroy() exit() for a in attribList: try: pt.attribValue(a) except: hou.ui.displayMessage('The Attribut "' + a + '" doesn\'t exit !') if(firstRun == 1): instances.destroy() exit() # Position Light if linkPosPts == 1: instances.parm('tx').setExpression('point("' + scatterNodePath + '", ' + str(pt.number()) + ', "' + 'P' + '", 0)') instances.parm('ty').setExpression('point("' + scatterNodePath + '", ' + str(pt.number()) + ', "' + 'P' + '", 1)') instances.parm('tz').setExpression('point("' + scatterNodePath + '", ' + str(pt.number()) + ', "' + 'P' + '", 2)') else : instances.parm('tx').deleteAllKeyframes() instances.parm('tx').set(pt.position()[0]) instances.parm('ty').deleteAllKeyframes() instances.parm('ty').set(pt.position()[1]) instances.parm('tz').deleteAllKeyframes() instances.parm('tz').set(pt.position()[2]) # Revert parm value to default value for rpv in revertParmValue: instances.parm(rpv).deleteAllKeyframes() instances.parm(rpv).revertToDefaults() # Copy Points Value in Paramaters for cap in copyPtAttribValue: instances.parm(cap).deleteAllKeyframes() instances.parm(cap).set(pt.attribValue(cap)) # Link Points Value in Paramaters for lap in linkAttribPt: type = scatterGeo.findPointAttrib(lap).dataType() if str(type) == "attribData.String" : print(type) instances.parm(lap).setExpression('points("' + scatterNodePath + '", ' + str(pt.number()) + ', "' + lap + '")') else : instances.parm(lap).setExpression('point("' + scatterNodePath + '", ' + str(pt.number()) + ', "' + lap + '", 0)') if pt.number() == 0 : # Color Node instances.setColor(hou.Color((1.0, 0.72, 0))) else : instances.setColor(hou.Color((1, 0.98, 0.67))) # Link Paramaters To First Instance's paramaters for lpfi in linkParmFirstInstance: instances.parm(lpfi).setExpression('chs("/obj/' + instanceName + '_0/' + lpfi + '")') # NetworkBox networkBoxMain = hou.item('/obj/networkMain') networkBoxInst = hou.item('/obj/networkInst') try: if networkBoxMain.comment() == instanceName: networkBoxMain.destroy(False) except: pass try: if networkBoxInst.comment() == (instanceName + "_Instance"): networkBoxInst.destroy(False) except: pass networkBoxMain = hou.node('/obj/').createNetworkBox('networkMain') networkBoxMain.setComment(instanceName) networkBoxMain.setColor(hou.Color((0.98, 0.78, 0.26))) networkBoxMain.setMinimized(1) networkBoxInst = hou.node('/obj/').createNetworkBox('networkInst') networkBoxInst.setComment(instanceName + "_Instance") networkBoxInst.setColor(hou.Color((1, 0.98, 0.67))) networkBoxInst.setMinimized(1) col = round(sqrt(len(scatterGeo.points()))) for pt in scatterGeo.points(): nameInstance = instanceName + '_' + str(pt.number()) i = pt.number() node = hou.node('/obj/' + instanceName + '_' + str(i)) if i == 0: node.setPosition([.2, .8]) networkBoxMain.addItem(node) networkBoxMain.addNetworkBox(networkBoxInst) else : networkBoxInst.addItem(node) tmpPos = [i%col*3, round((col*col-i / col)-.5)] node.setPosition(tmpPos) networkBoxInst.resize([1, 1]) networkBoxInst.setPosition([1.5, 0]) networkBoxMain.resize([1, 1]) tmpPos = scatterNode.parent().position() tmpPos[0] += 4 networkBoxMain.setPosition(tmpPos) networkBoxMain.setMinimized(0)

Thanks man! Im not skilled enough to get what you did there:-(Where do you feed color in that volume? And also can't find that example file...ty again..and sorry for noobness:-) Carlo

Yes, in your example i see much less blending.May you try to add rgb colors and see if it works properly? How did you acheive that? Thakns alot! Carlo

With furter inspections i found the issue.Is the OPNECL, enabling it in the sim gives that problem in the advection of Cd.Using the gas advect field bypass that.In fact using OPENCL in the gas advect field too make the issue come back again.

Hi everybody! I'm working on a soap bubble effect. The result using 2d pyro is pretty good but i would like to avoid color blending.Like would be if was pops sim. Both results are attached. Ty in advance! Carlo

Hi! Ty for the reply!Finally i managed it with a gas advect field.Not sure why otherwise was't working.But now is quite perfect.I just would avoid color blending but not sure if is possible. Carlo

Hi everybody! It is possible to copy Cd field from previous frame in a pyro simulation?I'm doing a 2d fluid sim and somehow the i have yellow color wich keep accumulating.Maybe copy color from prev frame solve this. Thanks in advance. Carlo

Hi everybody, i'm tryng to subfracture some rbd pieces created with the rbdMaterialFracture node. Like the big chunks in this video. How can i create constraint between the subfractured fragments?I think i'm missing something about the new rbd set of tools... Thanks alot, Carlo -EDIT- I FINALLY SWITCHED TO CLASSIC RBD INSIDE DOP NETWORK..OLD SCHOOL METHOD LOOKS LIKE WORKING......ANY SUGGESTION ABOUT RECURSIVE FRACTURING WITH THE NEW RBD SET?

Hi everybody, i'm facing some weird artifacts in whitewater when increasing guided ocean particle separation to 0.01, if i use 0.02 everything works as expected. I did also try to play with whitewater resolution but no change in that artifact.

Yeah!it works just perfectly!!:-)))))

Hey Librarian, yes exactly! i think going to use pop fluid instead of flips for this one.With point replaicate to add density...let's see:-) C.

Hello forum! I need to create a powder splash, so the powder behave like water creating a crown. I did try a straightorward approach just converting flip particles, the look is ok but the "id" of every point change in time so the random pscale make the scale of each point change each frame. I also created extra powder emitting from fastest point some more particles. Can anybody suggest me a workaround for random pscale and maybe a more elegant overall approach to this? Thanks alot! Carlo

Sorry my bad..didn't thank you!! Ill do it now!! Thanks alot for the tip!!