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  1. 24 points
    There are so many nice example files on this website that I am often searching for. I wanted to use this page as a link page to other posts that I find useful, hopefully you will too. Displaced UV Mapped Tubes Particles Break Fracture Glue Bonds Render Colorized Smoke With OpenGL Rop Moon DEM Data Creates Model Python Script Make A Belly Bounce Helicopter Dust Effect Conform Design To Surface Benjamin Button Intro Sequence UV Style Mapping UV Box and Multiple Projection Styles Ping Pong Frame Expression Instance vs. Copy (Instance Is Faster) Particle Bug Swarm Over Vertical and Horizontal Geometry Rolling Cube Rounded Plexus Style Effect Pyro Smoke UpRes Smoke Trails From Debris Align Object Along Path Fading Trail From Moving Point Swiss Cheese VDB To Polygons Get Rid Of Mushroom Shape In Pyro Sim A Tornado Ball Of Yarn Particles Erode Surface Unroll Paper Burrow Under Brick Road Non Overlapping Copies Build Wall Brick-By-Brick FLIP Fluid Thin Sheets Smoke Colored Like Image Volumetric Spotlight Moving Geometry Using VEX Matt's Galaxy Diego's Vortex Cloud Loopable Flag In Wind Eetu's Lab <--Must See! Wolverine's Claws (Fracture By Impact) Houdini To Clarisse OBJ Exporter Skrinkwrap One Mesh Over Another Differential Growth Over Surface [PYTHON]Post Process OBJ Re-Write Upon Export Rolling Clouds Ramen Noodles Basic Fracture Extrude Match Primitive Number To Point Number Grains Activate In Chunks Fracture Wooden Planks Merge Two Geometry Via Modulus Fill Font With Fluid DNA Over Model Surface VDB Morph From One Shape To Another Bend Font Along Curve Ripple Obstacle Across 3D Surface Arnold Style Light Blocker Sphere Dripping Water (cool) Exploded View Via Name Attribute VEX Get Obj Matrix Parts eetu's inflate cloth Ice Grows Over Fire Flying Bird As Particles DEM Image To Modeled Terrain Pyro Temperature Ignition Extrude Like Blender's Bevel Profile Particles Flock To And Around Obstacles BVH Carnegie Mellon Mocap Tweaker (python script) Rolling FLIP Cube Crowd Agents Follow Paths Keep Particles On Deforming Surface Particle Beam Effect Bendy Mograph Text Font Flay Technique Curly Abstract Geometry Melt Based Upon Temperature Large Ship FLIP Wake (geo driven velocity pumps) Create Holes In Geo At Point Locations Cloth Blown Apart By Wind Cloth Based Paper Confetti Denim Stitching For Fonts Model A Raspberry Crumple Piece Of Paper Instanced Forest Floor Scene FLIP pushes FEM Object Animated Crack Colorize Maya nParticles inside an Alembic Path Grows Inside Shape Steam Train Smoke From Chimney Using Buoyancy Field On RBDs In FLIP Fluid Fracture Along A Path COP Based Comet Trail eetu's Raidal FLIP Pump Drip Down Sides A Simple Tornado Point Cloud Dual Colored Smoke Grenades Particles Generate Pyro Fuel Stick RBDs To Transforming Object Convert Noise To Lines Cloth Weighs Down Wire (with snap back) Create Up Vector For Twisting Curve (i.e. loop-d-loop) VDB Gowth Effect Space Colonization Zombie L-System Vine Growth Over Trunk FLIP Fluid Erosion Of GEO Surface Vein Growth And Space Colonization Force Only Affects Particle Inside Masked Area Water Ball External Velocity Field Changes POP particle direction Bullet-Help Small Pieces Come To A Stop Lightning Around Object Effect Lightning Lies Upon Surface Of Object Fracture Reveals Object Inside Nike Triangle Shoe Effect Smoke Upres Example Julien's 2011 Volcano Rolling Pyroclastic FLIP Fluid Shape Morph (with overshoot) Object Moves Through Snow Or Mud Scene As Python Code Ramp Scale Over Time Tiggered By Effector Lattice Deforms Volume Continuous Geometric Trail Gas Enforce Boundary Mantra 2D And 3D Velocity Pass Monte Carlo Scatter Fill A Shape Crowd Seek Goal Then Stop A Bunch Of Worms Potential Field Lines Around Postive and Negative Charges Earthquake Wall Fracture Instance Animated Geometry (multiple techniques) Flip Fluid Attracted To Geometry Shape Wrap Geo Like Wrap3 Polywire or Curve Taper Number Of Points From Second Input (VEX) Bullet Custom Deformable Metal Constraint Torn Paper Edge Deflate Cube Rotate, Orient and Alignment Examples 3D Lines From 2D Image (designy) Make Curves In VEX Avalanche Smoke Effect Instant Meshes (Auto-Retopo) Duplicate Objects With VEX Polywire Lightning VEX Rotate Instances Along Curved Geometry Dual Wind RBD Leaf Blowing Automatic UV Cubic Projection (works on most shapes) RBD Scatter Over Deforming Person Mesh FLIP Through Outer Barrier To Inner Collider (collision weights) [REDSHIFT] Ground Cover Instancing Setup [REDSHIFT] Volumetric Image Based Spotlight [REDSHIFT] VEX/VOP Noise Attribute Planet [REDSHIFT] Blood Cell Blood Vessel Blood Stream [REDSHIFT] Light Volume By Material Emission Only [REDSHIFT] Python Script Images As Planes (works for Mantra Too!) [REDSHIFT] MTL To Redshift Material [REDSHIFT] Access CHOPs In Volume Material [REDSHIFT] Mesh Light Inherits Color [REDSHIFT] Color Smoke [REDSHIFT] FBX Import Helper [REDSHIFT] Terrain Instancer Height Field By Feature Dragon Smashes Complex Fractured House (wood, bricks, plaster) Controlling Animated Instances Road Through Height Field Based Terrain Tire Tread Creator For Wheels Make A Cloth Card/Sheet Follow A NULL Eye Veins Material Matt Explains Orientation Along A Curve Mesh Based Maelstrom Vortex Spiral Emit Multiple FEM Objects Over Time Pushing FEM With Pyro Spiral Motion For Wrangle Emit Dynamic Strands Pop Grains Slope, Peak and Flat Groups For Terrains Install Carnegie Mellon University BVH Mocap Into MocapBiped1 Ramp Based Taper Line Fast Velocity Smoke Emitter Flip Fill Cup Ice Cubes Float [PYTHON]Export Houdini Particles To Blender .bphys Cache Format [PYTHON] OP UNHIDE ALL (opunhide) Collision Deform Without Solver or Simulation Mograph Lines Around Geometry Waffle Cornetto Ice Cream Cone Ice Cream Cone Top Unroll Road Or Carpet Burning Fuse Ignites Fuel or Painted Fuel Ignition Painted Fuel Combustion Small Dent Impact Deformation Particle Impact Erosion or Denting Of A Surface Helicopter Landing Smoke And Particles Radial Fracture Pieces Explode Outwards Along Normal Tangent Based Rocket Launch Rolling Smoke Field Tear/Rip FLIP (H12 still works in H16) Rain Flows Over Surface Rains Water Drip Surface Splash Smoke Solver Tips & Tricks Folding Smoke Sim VEX Generated Curve For Curling Hair Copy and Align One Shape Or Object To The Primitives Of Another Object (cool setup) A Better Pop Follow Curve Setup FEM Sea Cucumber Moves Through Barrier Fracture Cloth Smoke Confinement Setup Merge multiple .OBJ directly Into A Python Node Blood In Water Smoke Dissipates When Near Collision Object Whirlpool Mesh Surface Whirlpool Velocity Motion For FLIP Simple Bacteria Single Point Falling Dust Stream Flames Flow Outside Windows Gas Blend Density Example Localized Pyro Drag (smoke comes to a stop) Granular Sheet Ripping Post Process An Export (Post Write ROP Event) Corridor Ice Spread or Growth Set Velocity On Pieces When Glue Bonds Break Water Drops Along Surface Condensation Bottle Grains Snow or Wet Sand Starter Scene A Nice Little Dissolver Turn An Image Into Smoke Fading Ripples Grid Example Stranger Things Wall Effect Face Through Rubber Wall [PYTHON]Create Nurbs Hull Shelf Tool [PYTHON] Ramp Parameter Select Outside Points Of Mesh, Honor Interior Holes Sparks Along Fuse With Smoke Umbrella Rig Melt FLIP UVs Tire Burn Out Smoke Sim Flip or Pyro Voxel Estimate Expression Motorcycle or Dirt Bike Kicks Up Sand Particles Push Points Out Of A Volume [PYTHON]Cellular Automata Cave Generator Punch Dent Impact Ripple Wrinkle VEX Rotate Packed Primitive Via Intrinsic Kohuei Nakama's Effect FLIP Fluid Inside Moving Container Particles Avoid Metaball Forces FLIP Divergence Setup FLIP Transfer Color Through Simulation To Surface Morph Between Two Static Shapes As Pyro Emits Constraint Based Car Suspension Pyro Smoke Gas Disturbs Velocity Wire Solver Random Size Self Colliding Cables Fast Cheap Simple Collision Deform CHOP Based Wobble For Animated Character Slow Motion FLIP Whaitewater Avoid Stepping In Fast Pyro Emission Fast Car Tires Smoke FLIP Fluid Fills Object Epic Share Of Softbody/Grain Setups (Must see!) Balloon, Pizza, Sail, Upres Shirt, Paint Brush Create Pop Grain Geometry On-The-Fly In A DOPs Solver Varying Length Trails VEX Based Geometry Transform Determine Volume Minimum and Maximum Values Grain Upres Example Animated pintoanimation For Cloth Sims Batch Render Folder Of OBJ files Vellum Weaving Cloth Fibers Knitting Kaleidoscopic Geometry UV Image Map To Points Or Hair Color Particles Like Trapcode Particular Flat Tank Boat Track With Whitewater Orthographic Angle Font Shadow Select Every Other Primitive or Face? Printer Spits Out Roll Of Paper Unroll Paper, Map, Plans, Scroll Simple Vellum L-System Plant Basic Cancer Cell 2D Vellum Solution Vellum Animated Zero Out Stiffness To Emulate Collapse Whitewater On Pre Deformed Wave [PYTHON] Menu Callback Change Node Color Extruded Voronoi With Scale Effector Multi Material RBD Building Fracture House Collapse Spin Vellum Cloth Whirlpool Vortex Trippy Organic Line Bend Design Logo Based Domino Layout Delete Outer Fracture Pieces, Keeping Inside Pieces UV Mapped Displaced Along Length Curly Curves Slow Particle Image Advection Nebula Saw Through VDB Like Butter Fuel Based Rocket Launch With Smoke Deform Pyro Along Path Bend Pyro Gas Repeat Solver With RBD Collision Raining Fuel Fire Bomb City Video Tutorial Pyro Cluster Setup (Animated Moving Fuel Source) [PYTHON] Mantra .MTL File Reader (creates new materials) Pyro Dampen By Distance FLIP Fluid Sweeps Away Crowd Ragdoll Gas Repeat Solver X-Men Mystique Feather Effect Camera Frustum Geometry Culling Vellum Extrude Shape Into Cloth Wire Web Constraint Setup Use Google To Discover Attached HIP Files Useful Websites: Tokeru Houdini Houdini Vex Houdini Python FX Thinking iHoudini Qiita Ryoji Video Tutorials: Peter Quint Rohan Dalvi Ben Watts Design Yancy Lindquist Contained Liquids Moving Fem Thing Dent By Rigid Bodies Animating Font Profiles Swirly Trails Over Surface http://forums.odforce.net/topic/24861-atoms-video-tutorials/ http://forums.odforce.net/topic/17105-short-and-sweet-op-centric-lessons/page-5#entry127846 Entagma SideFX Go Procedural
  2. 19 points
    I thought it fitting to post this here too ;). For better or worse, I'm launching a vfx and animation studio at the end of the week. Some of you may recognize some of the name (if you squint and look at it just right). http://theodstudios.com
  3. 16 points
    Hello Houdini Users, Today we celebrates the 25th Anniversary of Jeff (Old School) Wagner joining SideFX! Over the past 25 years Jeff has helped so many of our customers learn Houdini through his detailed Tech Support replies. His insightful online tutorials. And his enthusiastic live presentations. Jeff has never run out of exciting new things to show us in Houdini, (and Prisms in the early days). If you would like share your experiences of watching Jeff's classes please do so. And take a moment to wish him a Happy Anniversary! All the best, Jenny Blacklock. Technical Support Manager SideFX
  4. 15 points
    I wrote a custom render engine in COPs today. While 'engine' is probably a bit far fetched, it's a little ray tracer experimentally supporting: Meshes with UV coordinates Shading on diffuse textures Multiple point lights (including color, intensity, size) Area shadows and light attenuation Ambient occlusion Specular highlights Reflections with varying roughness The snippet basically transforms the pixel canvas to the camera position and shoots rays around using VEX functions like intersect() and primuv(). The rendering process only takes a few seconds. I still have to figure the licensing fees, though COP_render.hipnc
  5. 15 points
    I wrote an article that is probably only of interest for the .1% It is a crash introduction to HDK, C++ and the mesh laplacian. https://mbaadsgaard.com/portfolio/laplacian-eigenvector-plugin-for-houdini/ Feedback is, of course, also welcome
  6. 15 points
    Hi everyone, Herer's a little personal project I did over the last year. No keyframes where used for the animation. Each movement is generated through physical simulation or procedural noise. The Bananas and Pears are done in H16.5 using CHOPs controlled Bones and then fed into a FEM simulation. All the other fruits are done using H17 and Vellum. ÖBST: "How would fruits move if they could?" Hope you like it.
  7. 14 points
    nature.hipnc just to say hello and share some stuffs. /cnc_verkstad/ Tesan Srdjan
  8. 14 points
    A lot of people asked me to share this fake fire method.If you interested it, you can will check this simple hip. After rander i used ACES for a better look. fake_fire_rnd.hip
  9. 13 points
    A while ago, I was working on a project that had lots of animated tiles. It is actually quite a tricky problem to pack a bunch of shapes together with the smallest amount of "grout". While researching this, I stumbled across this paper "Simulating Decorative Mosaics" by Alejo Hausner, and thought this would be a perfect thing to implement in Houdini! Here is the input, the houdini logo: Also needed are curves that represent the color or element boundaries: Here is one iteration of the loop. This is basically the result you would get copying tiles using a scatter and copy sop: After running the loop for fifty iterations, the tiles seem to be pretty well packed, and are respecting the boundary curves very well: And lastly, here is a version with randomized tile sizes. Still works pretty well! While I never actually ended up using this in production, But I thought it was pretty cool and could be used for other stuff, like maybe packing houses in a procedurally generated map or something. Anyway, here is an example .hip file if anyone wants to play around with it: mosaics_example.hip
  10. 13 points
    Now I get it , just to fine adjust and I'm goona posted hipnc .
  11. 12 points
    A basic way to span a graph that efficiently connects all points using Prim's algorithm. https://en.wikipedia.org/wiki/Prim's_algorithm minimal_graph.hipnc
  12. 12 points
    Great stuff, Nicolas. This is starting to look Giger-like already! You don't necessarily need to create UVs in SOPs, though. To project textures on those VDB meshes it's arguably more efficient to do in a shader: 1) Transform position to world space. 2) Curve IDs shown as random colors. 3) U value from curves in HSV colors. 4) Direction to nearest curve position. 5) Tangents from curves set to absolute. 6) Direction to curve oriented along tangents. 7) V coordinate enclosing each wire. 8) UV coordinates in red and green. 9) UV mapping an image texture. 10) Texture based displacement along curves or at least what happens when mandrills do the job ; ) The material snippet: string geo = 'op:/obj/curves/OUT'; P = ptransform('space:current', 'space:world', P); int prim = -1; vector uvw = vector(0.0); float dist = xyzdist(geo, P, prim, uvw); vector pos = primuv(geo, 'P', prim, uvw); float u = primuv(geo, 'u', prim, uvw); vector tangent = primuv(geo, 'tangentu', prim, uvw); matrix3 rot = dihedral(tangent, {0,1,0}); vector dir = normalize(P - pos); vector dir_mod = dir * rot; float v = fit( atan2(dir_mod.z, dir_mod.x), -M_PI, M_PI, 0.0, 1.0 ); P = set(u, v, 0.0); curly_curves_shader.hipnc
  13. 11 points
    Hi all, As some of you may know I have recently started a youtube channel where I am sharing some techniques, setups and tips. My goal is to first cover some of the fundamental tools/setups and then build more elaborate setups. I wanted to share this with the odforce community too as this community will always have a special place in my heart :). Thank you for watching & have fun learning! The channel: https://www.youtube.com/channel/UCZMPkkgnAFghvffxaTh6CsA My first video:
  14. 11 points
    Hi all! This is the dynamic cloud I created with time-lapse effect in Houdini 17.5. I tried many ways and added several types of Gas Microsolvers, especially during the process of the dissipation and creation of the could. Because this is a difficult problem that must be solved in order to complete simulation, I added more Gas Microsolvers to control the shape of the cloud and adjusted its ambient temperature and buoyancy forces. Eventually the problem is solved. You’re welcome to make comments and discuss the related skills. https://vimeo.com/376645761 My PC specs: Memory: 64GB Processor: AMD Ryzen 1950X Graphics: GeForce GTX 1070Ti Simulation: 20H Space disk: 500G Render:Mantra I recommend using Linux for massive simulation because Linux requires less ram usage than Windows.
  15. 11 points
    Few tips and tricks to manipulate gas simulation. 1. Independent resolution grid. E.g. Overriding vel grid size independent to a density grid. 2. Creating additional utilities. E.g. gradient, speed, vorticity and etc which can be used to manipulate forces. 3. Forces via VEX and some example snippets. smokesolver_v1.hipnc P.S. Some of this technique are not Open CL friendly though.
  16. 11 points
    Hi everyone! I've made an illustration video-tutorial about the Heat Method application to point clouds by Keenan Crane et al, Yang Liu et al and others.
  17. 11 points
    Hi, Just posting some of my recent art. Most of it is houdini. Some is a mix of Houdini, Daz and Marvelous Designer. If you see a character, that's definitely from Daz. Everything is rendered in Octane. regards Rohan
  18. 10 points
    A little experiment I like to nickname: 'Life as a VFX Artist'
  19. 10 points
    I can't take credit for it, but it needed to be shared. This made me cry with laughter.
  20. 10 points
    what if the self buttons were creating DOP setups inside one SOP network instead of having a Geometry node, a DOP network for simulation and another Geometry node to import the data and save to disk. It makes much more sense to see the data flow from top to bottom in one network without having to jump to different levels for no reason. maybe it's just me... grains.hipnc
  21. 10 points
    I've wanted to tackle mushroom caps in pyro sims for a while. Might as well start here... Three things that contribute greatly to the mushroom caps: coarse sub-steps, temperature field and divergence field. All of these together will comb your velocity field pretty much straight out and up. Turning on the velocity visualization trails will show this very clearly. If you see vel combed straight out, you are guaranteed to get mushrooms in that area. If you are visualizing the velocity, best to adjust the visualization range by going forward a couple frames and adjusting the max value until you barely see red. That's your approximate max velocity value. Off the shelf pyro explosion on a hollow fuel source sphere at frame 6 will be about 16 Houdini units per second and the max velocity coincides with the leading edge of the divergence filed (if you turn it on for display, you'll see that). So Divergence is driving the expansion, which in turn pushes the velocity field and forms a pressure front ahead of the explosion because of the Project Non-Divergent step that assumes the gas is incompressible across the timestep, that is where where divergence is 0. I'm going to get the resize field thingy out of the way first as that is minor to the issue but necessary to understand. Resizing Fields Yes, if you have a huge explosion with massive velocities driven by a rapidly expanding divergence field, you could have velocities of 40 Houdini units per second or higher! Turning off the Gas Resize will force the entire container to evaluate which is slow but may be necessary in some rare cases, but I don't buy that. What you can do is, while watching your vel and divergence fields in the viewport, adjust the Padding parameter in the Bounds field high enough to keep ahead of the velocity front as that is where you hope for some nice disturbance, turbulence and confinement to stir around the leading edge of the explosion. or... Use several fields to help drive the resizing of the containers. Repeat: Use multiple fields to control the resizing of your sim containers. Yep, even though it says "Reference Field" and the docs say "Fluid field..", you can list as many fields in this parameter field that you want to help in the resizing. In case you didn't know. Diving in to the Resize Container DOP, there is a SOP Solver that contains the resizing logic that constructs a temporary field called "ResizeField", importing the fields (by expanded string name from the simulation object which is why vector fields work) with a ForEach SOP, each field in turn, then does a volume bound with the Volume Bounds SOP on all the fields together using the Field Cutoff parameter. Yes there is a bit of an overhead in evaluating these fields for resizing, but it is minor compared to having no resizing at all, at least for the first few frames where all the action and sub-stepping needs to happen. Default is density and why not, it's good for slower moving sims. Try using density and vel: "density vel". You need both as density will ensure that the container will at least bound your sources when they are added. Then vel will very quickly take over the resizing logic as it expands far more rapidly than any other field in the sim. Then use the Field Cutoff parameter to control the extent of the container. The default here is 0.005. This works for density as this field is really a glorified mask: either 0 or 1 and not often above 1. Once you bring the velocity field in to the mix, you need to adjust the Field Cutoff. Now that you have vel defined along side density, this Field Cutoff reads as 0.005 Houdini units per second wrt the vel field. Adjust Field Cutoff to suit. Start out at 0.01 and then go up or down. Larger values give you smaller, tighter containers. Lower values give you larger padding around the action. All depends on your sim, scale and velocities present. Just beware that if you start juicing the ambient shredding velocity with no Control Field (defaults to temperature with it's own threshold parameter so leave there) to values above the Field Cutoff threshold, your container will zip to full size and if you have Max Bounds off, you will promptly fill up your memory and after a few minutes of swapping death, Houdini will run out of memory and terminate. Just one of the things to keep in mind if you use vel as a resizing field. Not that I've personally done that... The Resolution Scale is useful to save on memory for very large simulations, which means you will be adjusting this for large simulations. The Gas Resize Field DOP creates a temporary field called ResizeBounds and the resolution scale sets this containers resolution compared to the reference fields. Remember from above that this parameter is driving the Volume Bound SOP's Bounding Value. Coarser values leads to blurred edges but that is usually a good thing here. Hope that clears things up with the container resizing thing. Try other fields for sims if they make sense but remember there is an overhead to process. For Pyro explosions, density and vel work ok. For combustion sims like fire, try density and temperature where buoyancy contributes a lot to the motion.
  22. 9 points
    The End is Nigh! Houdini 18 is COMING!!! Kicking this wish list off as by all trending and statistical estimated Houdini 18 should be arriving in the Halloween time period of old. My first wish is a call to ARMs! Seriously speaking maybe one day Python 3 inline with the Visual Effects Society guidelines for 2020, but long term a lot of hardware profiles are switching to ye-old ARM based architecture something as old as SideFX itself and installed on over a 100 Billion devices. The catch is these are the IOT, Mobile, and XR hardware of the world which to be fair is still behind server racks. However the phone has drastic computing potential that if Intel would stop fighting it due to licensing issues ARM and RISC would have taken over the market. I really hope COPs has a second a life. It's easier to use SOPs and VEX for processing images and HEIGHTFIELDS than with COPs with far less bottle necks and crashing. The amount of nodes and stability in COPs is falling far behind all other contexts including every ones darling wrangle node. I would almost wish for COPs to be fully integrated into SOPs or MATs. Streamline the support into two heavily invested areas already. Gaining several debugging abilities that are just not implemented in COPs like the Geometry Spreadsheet. There are 151 nodes in COPs in which a lot of them could become quickly redundant if ported to either SOPs or MATs. If converted to MATs we would then have a Substance equivalent, especially if they gave the node UI a little love to show per node images. The biggest risk is overloading another context, but to be fair COPs is so severely under loaded it falls into the second tier of networks, so porting those tools would be a mere blip on the radar of total node count. My most realistic wish currently if for subnets and managers to have the flatten ability like foreach loops with the ability to collapse and dive into them. This would maintain networks for those of you who fear the combined context, but also allow to flatten simple networks so you can easily trace and debug all dependencies. As always this is a non-official wish list. So please submit BUGs, RFEs, and Questions to support. Also for anecdotal questions and rants branch them to another thread people will more likely help you for dedicated issues. -Ben
  23. 9 points
    Let's suppose we want to imitate graffiti art pieces with minimal effort. Warp the lines into curvy curves. Map the direction to the closest curves with greyscale values. Colorize each segment. And e x p l o d e by color difference. curve_art.hipnc
  24. 9 points
    Just to show the blender heads how it's done ; ) I have created a tutorial on modeling a procedural donut and chose this place for posting the (updated) hip file. donut.hipnc
  25. 9 points
    Haven't seen 18 yet so don't know if the code editor was improved, but if not, this still is my ABSOLUTE NR. 1 wish. if(code_editor_improved != true) { Code editing in Houdini Wrangles is - well - crap. It's a total shame we don't even see command parameter lists when typing since even in value fields typing expressions does it and has autocomplete for paths etc. Even only bringing that ability to the VEX editor would be very helpful. Of course it would also make a lot of sense to have other settings and helpers in there, like auto-closing brackets, more clever cursor positioning, offering existing variables and attributes when typing etc. - the Houdini devs should know ALL about that, they probably spend their life in real code editors... The use of external editors could be improved a lot if a.) we wouldn't have to press ALT+E twice for the external editor and wouldn't have to get to the floating editor first each time and b.) if that connection would be "live" like for instance the Pinegrow Web Editor does it with a little plugin for Code and Atom, where you can type in either the internal or external editor and they update each other in realtime. The current system is too clumsy and the 3rd party implementations also aren't really there (no negativity towards the authors intended at all!). Make it native! Make it goooooooood! } else { All is well. Nothing to see here. :-) } Cheers, Tom
  26. 9 points
    Hey Guys. I made this little quicktip video about collision optimization. Have a watch if you fancy.
  27. 9 points
    Hey all, here's a shot I've been working on! Speed Tree, Houdini and Redshift. Have a good one
  28. 9 points
    it's pretty straightforward out of the box just use v@N, v@up or p@orient on your instancing points in such a way that resulting reference frame has Y pointing in up-down direction of your ocean (so in normal direction of the ball) and X in the direction you want wind to blow in in your file, since v@N is pointing outwards and v@N defines Z axis, your ocean deforms in a tangential direction and therefore you are seeing weird deformation here is the modified file ts_ocean_on_ball.hip
  29. 8 points
    Hello! I'm starting a twitch dot television channel and will be streaming Houdini training content. I've worked at several large VFX and advertising studios as well as taught Houdini classes at Academy of Art university. I'm hoping I can reach a larger audience through Twitch as well as the idea that people viewing the stream can participate by asking questions and providing feedback in real time. This is my channel: https://www.twitch.tv/johnkunz My first stream will be starting on Sunday (Jan 26th) @ 1pm PST. If you follow my channel (it's free ), you'll get an email notification whenever I start a stream. I'll be going over this project I recently finished https://www.behance.net/gallery/90705071/Geometric-Landscapes showing how I built things (VOPs, packed prims, Redshift render) and why I set things up the way I did. Some of the images I made are shown below. Please come by this Sunday with any questions or ideas you might have!
  30. 8 points
    Hi Zunder, I think the second video you have posted shows almost the entire process: He is basically deforming a spiraling grid.. flower.hipnc
  31. 8 points
    Hey all! This has been on our minds for some time and we finally made a new forum: https://forums.odforce.net/forum/72-marketplace/ There seems to be a growing trend of commercially available tools for Houdini, which is a good thing and so we want to support it while also not polluting the general forums. If you're selling a service or a tool, please put it in that forum. And if anyone stumbles across older threads that have commercially available tools, please flag it and the mods will move it into that space. Thanks! M
  32. 8 points
    You asked, @srletak, here you go HIP file: https://www.dropbox.com/s/z21g0nl0qhl1c50/vellum_grass015_send.hip?dl=0 It's a simple way to make such kind of motion. I sometimes post different setups on Houdini Artists FB group. Feel free to join on FB/Insta to know about another hippy
  33. 8 points
    Procedurally generated cyberpunk building I've done this project before one year ,I draw a simple concept then I try to develop a complete procedural system inside houdini , it was fun experience Hope You Like it vimeo link : https://vimeo.com/349515288 behance: https://www.behance.net/gallery/83268643/Procedural-Cyberpunk-Building
  34. 8 points
    Hi everyone! The past week I worked on a personal project for learn something about hairs - vellum. It's my first project ever with hairs so I guess is nothing special but several people asked to see the hip file so here it is. Final result: Hip file (I had to recreate it but it should be pretty much the same): groom_clumping_03.hipnc https://andreasbabo93.wixsite.com/sbabovfx/example-files (new version, there was an error on the other one)
  35. 8 points
    Hello all. I wanted to share my production library of tools I have posted on Github. Previously a lot of these were posted on Orbolt.com after my 2016 GDC talks. The tools were originally designed to be used in a HOUDINI_PATH style library as opposed to individual hdas. In this manner they can include a larger array of script based tools that don't fall in the paradigm of Orbolt. This toolset is generally complementary to the GameDev, Mops, etc toolset, there are only a few overlaps nowadays. There are two primary libraries of tools. https://github.com/LaidlawFX/LaidlawFX - This is the production library built up over the last decade of work that has been cleansed of studio specific work. This currently contains a set HDA's, a common python library, shelf tools, and example files on how to used the .hdas. Some fun tools in here are an Ivy Generator inspired by Thomas Luft Ivy generator http://graphics.uni-konstanz.de/~luft/ivy_generator/ . File Cache nodes that have been tested on over a dozen productions. RBD to FBX extractors, and an array of ROP tools. Also a module of python code that includes a few sub-modules such as verbosity logging, multiple hda queuing, fbx exporting, file explorer opening, and the large set of options for file caching. Additionally it contains shelf scripts so that you no longer need to use the Material Library, you can just tab and use the shaders like normal nodes. https://github.com/LaidlawFX/HoudiniEngineDev - This is over one hundred hda's to test Houdini Engine implementations in different DCC's and game engine. Each of them test a simple principle from UI parameters to different geometry types and more. Hope they help you at some point. Feel free to branch or leave comments here and I can update the source. Thanks, -Ben
  36. 7 points
    Hey folks, proud to present LYNX Tools, a collection of production proven open source tools to accelerate your workflows! All mentioned tools are free to download via the links below and are licensed with a full HoudiniFX license. All Houdini Assets have complete Houdini native documentation available. Repository: https://github.com/LucaScheller/VFX-LYNX Lastest stable release: https://github.com/LucaScheller/VFX-LYNX/releases Please give them a test drive, so we can improve them further Roadmap | https://github.com/LucaScheller/VFX-LYNX/projects/1 So far there are three tools: LYNX_force_general | Tweak your sims with this all purpose & intuitive force field. Built to mimic force fields in other DCC applications, but with support for more features and a natural Houdini user experience. https://www.lucascheller.de/vfx/2019/03/24/vfx-lynx-houdini-force-general-asset/ LYNX_fabric | Create fabric/weave patterns with ease. Perfect for creating that holiday sweater you never wanted. https://www.lucascheller.de/vfx/2019/03/16/vfx-lynx-houdini-fabric-asset/ LYNX_velocity | Get control of your velocities via an intuitive UI or groom them for absolute fine tuned control. https://www.lucascheller.de/vfx/2018/11/01/vfx-lynx-houdini-velocity-asset/ More info on my website, including full release logs: https://www.lucascheller.de/blog/ Houdini User Group Munich Presentation: https://vimeo.com/334887452
  37. 7 points
    Hello peeps! This is a fun project created using Houdini, so hopefully it ain't against the rules! Vancouver had a snowmageddon last week, and I thought it was the time to make snow ducks! I whipped up this simple mould inside Houdini, got it 3d printed and BAM! Ice ducks! There's some improvements to be made - the joint that aligns both halves of the mold fills up with snow really easily, and they need to be kept clear in order for both halves to form a perfect seal. I think instead of using a half ball with its matching negative space, a cylinder matches with a through hole would allow the snow to pass through, and the cylinder would resist the moulds sliding out sideways. The head was also difficult to form - the ice kept sticking to the mould. Perhaps a coating of polyurethane or even just sanding the insides would help with that. The ducks themselves are a rubber duck model I got off thingiverse, converted to vdb then back to a mesh, sculpted that mesh in sops to remove undercuts, and finally I used the boolean sop to create the empty areas. The final snow duck is about 12cm tall, and the moulds themselves are printed with abs filament. It took about 12 hours for this print using a 0.4mm nozzle. I hope you found this interesting!
  38. 7 points
    Hi, thought I'd share this in this section too: I wrote an article for the german “Digital Production” magazine about my free LYNX VFX toolset. For the article I made a couple of renderings using the LYNX fabric tools. Luckily it even made the cover Here are my personal favorites, the rest of the images can be found on Artstation. You can also find the complete scene on GitHub under the Demo Files. So now anyone can design an ugly Christmas Sweater;) Looking forward to seeing what you guys come up with, enjoy! Links: LYNX VFX Toolset Odforce Thread: https://forums.odforce.net/topic/42741-lynx-free-opensource-vfx-pipeline-tools/ LYNX VFX Toolset (Sweater Scene File included): https://github.com/LucaScheller/VFX-LYNX Artstation (HighRes Renderings): https://www.artstation.com/artwork/OyeY6g Digital Production Magazin: https://www.digitalproduction.com/ausgabe/digital-production-01-2020/ Alternatively view the article in my latest blog post: https://www.lucascheller.de/vfx/2019/12/15/ynybp7wpiqtshoy/
  39. 7 points
    Hi everyone, At this link you'll find three new color schemes: Ash-Smoke-Soot.zip They are meant to be flatter and a bit more subtle compared to the standard themes. Smoke has similar values to the Houdini Dark theme, Soot is a bit darker and more desaturated, and Ash is a replacement for the Houdini Pro theme. Please let me know if you discover any usability issues or ugliness and I will do my best to update the file above. I'm 100% certain that I've overlooked some things... quite possibly obvious things. Edit 12/15/18 - Updated Ash theme to fix audio waveform visibility in playbar and visibility issues with node wires and node secondary text.
  40. 7 points
    You can generate collision / collisionvel fields from the vellum and copy it back to the smoke solver. DOP_Vellum_Pyro_Feedback_RnD_v002.hipnc
  41. 7 points
    I learned quite a bit from this tutorial as I have just recently started to learn Houdini. I took it a bit further and also applied the same or similar techniques to other variants. Rendering done in Renderman 22.6 Thanks, Ben P.S. I also could not see sprinkles sunk into the surface on my real world samples Quite the contrary in fact, the coating was reaching upwards by surface tension around the sprinkles by a tiny bit - which is what I tried to replicate on the donut with the pink sugar coating.
  42. 7 points
    I just wish we can select/edit multiple points at a time in Curve Node. It's been so many years, the Curve Tool in Houdini still sucks.
  43. 7 points
  44. 7 points
    Hello, friends! Finally, after 19 months of work, I finish my first Houdini project. This is a music video for my friend I did to learn Houdini. Rendered with 3x3 sampling on my laptop that`s why it`s so noisy. Working on the project, I develop an abstract production pipeline for Houdini called "Eve". It is a project management tool which can handle a large amount of data: https://github.com/kiryha/Houdini Thank you all for your support, it would not be done without your help! Cheers!
  45. 7 points
    Hello everyone! My name is Daniele, I'm new to Odforce. This is my first post, nice to meet you! I've been a character animator for a few years but recently I started learning Houdini. I'm learning using resources I find online, including some super useful posts from this forum. I would love to use this post to keep track of my progress and share my results with you. My first project is a procedural building, hip is attached. Cheers! Daniele procedural_house_01.hipnc
  46. 7 points
    More Unlimited Fun nature2 fun.hipnc
  47. 7 points
    Article on SideFX.com: https://www.sidefx.com/community/houdini-175-launch-event/
  48. 7 points
    For anyone that is interested: here is a tutorial on the best method I found to get nice motion. I figured I would post this since I still get messaged about this thread. https://youtu.be/DLSmz9HOKlE
  49. 7 points
    I pared the scene right back and rebuilt it using stuff I learned at the start of the year, its behaving as expected now I think. constrain_to_animated_anchors_matts_soft_rotation.hipnc
  50. 7 points
    Basic: // Primitive wrangle. int pts[] = primpoints(0, @primnum); vector rest = point(0, "P", pts[0]); vector prev_pos = rest; matrix3 frame = ident(); for (int i = 0; i < len(pts); i++) { vector pos = point(0, "P", pts[i]); rotate(frame, 0.1, {0, 0, 1}); vector new_pos = (pos - rest) * frame + prev_pos; rest = pos; prev_pos = new_pos; setpointattrib(0, "P", pts[i], new_pos); } Advanced: // Primitive wrangle. #define TWO_PI 6.2831852 addpointattrib(0, "N", {0, 0, 0}); int pts[] = primpoints(0, @primnum); int npt = len(pts); // Loop variables. vector rest = point(0, "P", pts[0]); vector prev_pos = rest; matrix3 frame = ident(); for (int i = 0; i < npt; i++) { vector pos = point(0, "P", pts[i]); vector delta = pos - rest; rest = pos; // Make normal. Point normals could be used instead. vector normal = normalize(cross(cross({0, 1, 0}, delta), delta)); if (length(normal) == 0) { normal = {0, 0, 1}; } // Drive a shape with ramps and multipliers. vector axis; float ramp, angle; // Twist the bend axis. axis = normalize(delta); ramp = chramp("twist_profile", (float) i / npt); angle = fit01(ramp, -TWO_PI, TWO_PI) * ch("twist") / (npt - 1); rotate(frame, angle, axis); // Bend the curve. axis = normalize(cross(normal, delta)); ramp = chramp("bend_profile", (float) i / npt); angle = fit01(ramp, -TWO_PI, TWO_PI) * ch("bend") / (npt - 1); rotate(frame, angle, axis); // Compute new position and normal. vector new_pos = delta * frame + prev_pos; prev_pos = new_pos; setpointattrib(0, "P", pts[i], new_pos); setpointattrib(0, "N", pts[i], normal * frame); } curl.hipnc
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