houdini tips and tricks Tutorial | Python Script included

Опубликовано: 19 Октябрь 2024
на канале: FaddyVFX

514

here is quick tips for houdini hope you like it

this is th epython script:

import hou

THRESHOLD = 0.015
def luminance(pixel):
return (0.299 * pixel[0] + 0.587 * pixel[1] + 0.114 * pixel[2])

def is_similar(pixel_a, pixel_b, threshold):
return abs(luminance(pixel_a) - luminance(pixel_b)) _ threshold

lst_user_selection = hou.selectedNodes()
if len(lst_user_selection):

Make a geo node that will ObjectMerge in all the nodes in the selection.
node_geo = hou.node('/obj').createNode("geo","geo_merge_result")
if node_geo:
node_geo.moveToGoodPosition()
#node_geo.node('file1').destroy()
node_merge = node_geo.createNode('merge')
node_merge.moveToGoodPosition()

Create a normal to fix up everything after the merge.
node_normal = node_geo.createNode("normal","normal1")
node_normal.setInput(0, node_merge) # Create a NULL for our output placeholder.
node_normal.setDisplayFlag(True)
node_normal.setRenderFlag(True)
node_normal.moveToGoodPosition()

Create a NULL for our output placeholder.
node_null = node_geo.createNode("null","OUT")
node_null.setInput(0, node_normal) # Create a NULL for our output placeholder.
node_null.setDisplayFlag(True)
node_null.setRenderFlag(True)
node_null.moveToGoodPosition()

for (n,node) in enumerate(lst_user_selection):
#print node.name()
node_temp = node_geo.createNode("object_merge",node.name())
node_temp.parm('objpath1').set(node.path())
node_temp.parm('xformtype').set(1)
node_temp.moveToGoodPosition()

assign_by_node_color = True
if assign_by_node_color:
Use the color of nodes to inherit the same @shop_materialpath.
s = "rs_DEFAULT"
if is_similar(node.color().rgb(), (0.584,0.776,1.0), THRESHOLD): s = "rs_blue3"
if is_similar(node.color().rgb(), (0.6,0.6,0.6), THRESHOLD): s = "rs_grey5"
if is_similar(node.color().rgb(), (0.145,0.667,0.557), THRESHOLD): s = "rs_green5"
if is_similar(node.color().rgb(), (1.0,0.725,0.0), THRESHOLD): s = "rs_yellow6"
if is_similar(node.color().rgb(), (0.996,0.933,0.0), THRESHOLD): s = "rs_yellow5"

Create a wrangle to define our shop_materialpath.
node_wrangle = node_geo.createNode("attribwrangle","attribwrangle1")
node_wrangle.parm('snippet').set('s@shop_materialpath = "/shop/%s";' % s)
node_wrangle.parm('class').set(1)
node_wrangle.moveToGoodPosition()
node_wrangle.setInput(0, node_temp)

Create a color to match the node color.
node_color = node_geo.createNode("color","color1")
node_color.parm('colorr').set(node.color().rgb()[0])
node_color.parm('colorg').set(node.color().rgb()[1])
node_color.parm('colorb').set(node.color().rgb()[2])
node_color.moveToGoodPosition()
node_color.setInput(0, node_wrangle)

node_merge.setInput(n,node_color)
else:
node_merge.setInput(n,node_temp)

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