VEX: Rotation Around Axis
float angle = chf(“angle”); vector4 rot = quaternion(radians(angle), {1,0,0}); @N=qrotate(rot, @N);
houdini
Python: Phyllotaxis
node = hou.pwd() geo = node.geometry() # Add code to modify contents of geo. # Use drop down menu to select examples. from math import radians, sqrt, sin, cos numpoints = 200 angle = 137.508 cval = 0.2 for i in range(numpoints): theta = radians (i * angle) x = cval * sqrt(i) * cos(theta)
Python: Split Into Groups
This little script for Houdini is one I’ve had knocking about and thought might be useful to throw out onto t’interweb. Select the node at which you want to split out the groups and it will create a bunch of blasts and OUT nodes to separate out per group. import hou selectedNodes = hou.selectedNodes() for
Awards: JD.com – “Joy & Heron”
“Joy & Heron” has picked up a few awards in recent weeks. A Gold Ciclope for Long Form Animation A Silver LIA for Production & Post-Production: CGI Animation Golds at The One Show Awards for Online Video, Branded Entertainment, and Animation.
VEX: split string and convert to integer
//Split @anotherAttribute based on ‘_’ string myString[] = split(s@anotherAttribute, “_”); //Use last element as attribute value s@tempString = myString[-1]; //convert string to integer i@myIntegerFromString = atoi(s@tempString);
VEX: Bend Wrangle
Taken from https://tosinakinwoye.com/2017/01/23/houdini-vex-snippets/ //Input is a line //Resample SOP on line for more points //Activate curveu attrib in resample SOP //Remap curveu to shape of bend @curveu=chramp(“ramp”,@curveu); float bamt = chf(“bend_amt”); //bend amount vector benddir = chv(“bend_dir”); //bend direction @P+= benddir * bamt * @curveu;
Houdini Python: Find/Replace Parameter Expression
A little script to find/replace strings in selected nodes’, parameter expressions: import hou sel = hou.selectedNodes() dialog = hou.ui.readMultiInput(‘Find/Replace In Expression’, input_labels=[‘Find: ‘, ‘Replace: ‘,], buttons=("Find/Replace", "Cancel"), severity=hou.severityType.ImportantMessage, title=’Find/Replace’, close_choice=1) find = dialog[1][0] replace = dialog[1][1] if dialog[0] == 0: for n in sel: for parms in n.parms(): try: newString = str(parms.eval()).replace(find, replace) parms.set(newString) except:
VEX: SOP Rotation
f@speed = fit01(rand(@ptnum), ch(‘minSpeed’), ch(‘maxSpeed’)); float angle = (ch(‘angle’)+@ptnum)*@speed; vector axis = sample_direction_uniform(rand(@ptnum*ch(‘seed’))); @orient = quaternion(angle, axis);
15th Annual VES Awards
https://www.visualeffectssociety.com/post/15th-annual-ves-awards-nominees The Mill has received 7 VES nominations, one of which is for Sky Q in the category of “Outstanding Effects Simulations in a Photoreal Commercial”. themill.com/portfolio/2736/sky-q- SSE: Neon House is also nominated for “Outstanding Animated Performance in an Episode, Commercial or Real-Time Project” well done to our outstanding animators who continue to produce life-like
Houdini Tip: Toggle Update Mode
I often find that Houdini wants to cook at inconvenient times. To stop this you can enter Manual Mode which is located in the bottom right of the UI. To make toggling between Manual and Auto mode easier and quick it can be scripted and dedicated a hotkey. Googling brought up this feed http://www.vfxoverflow.com/questions/toggle-update-mode-in-houdini which
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