konstantin magnus
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Well, then you have quite a bit of research ahead of you. Maybe this helps: orient along curve SOP + primuv() can sample tangent directions from curves. 'texture bombing' adds structures based on image maps editing the pscale attribute along with pcfind_radius() changes radii the smooth()-function allows for different roll-offs. I have published lots of examples here and also some tutorials about this.
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- triangulate
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Hi Robert, to create procedural scales you could create voronoi cells based on an adaptively triangulated mesh. If a displacement map is all you want, better skip creating a high resolution mesh and write the cell distances directly to a map. scales.hipnc
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How to create a procedural mushroom model in SideFX Houdini. Video: Original thread: Latest file version: https://gumroad.com/konstantin_magnus
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Hand painted looking textures for low-poly models: paint_bake.hipnc
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Modeling Dry Fruit And Color by Attribute
konstantin magnus replied to Max_Steven's topic in Modeling
The sweep SOP can do the shape along with remapping the UV coordinates and Vellum for additional deformation. dry_fruit.hiplc -
Good art work! You can also make curves follow the mesh topology by choosing directions towards neighbour polygons. topo_flow.hipnc topo_flow_only_curvature.hipnc
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Thanks, but I am not so sure whether this comes close to the example image you have provided. -> Most of us just trail scattered points. So would anyone know how to achieve evenly spaced strokes? https://mrl.cs.nyu.edu/publications/illustrating-smooth/hertzmann-zorin.pdf
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If you want the top to be perfectly round, just scale the grid to 0 and control its radius with the offset in the attribute wrangle.
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Hi Max, first rule: do not boole. Boolean subtractions seem very intuitive at first glance, but if not used advisedly they can do a lot of harm to the mesh's topology. Instead, you could measure the direction of a cylinder's surface towards the profile curves and blend between their closest positions. > bottle.hipnc
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The measure SOP has a principal curvature direction you could use for hatching. sketch.hipnc
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Directional bevel ( i.e random gradient displace per piece )
konstantin magnus replied to vinyvince's topic in Modeling
You can pretty much choose a texture bombing approach to achieve this. Also look into "multiparm blocks" and set their count with the nuniquevals expression, if you really want to define all the curve ramps by yourself. Here is a tutorial: https://odysee.com/@konstantinmagnus:5/houdini-tutorial-texture-bombing-shader:7 projection.hipnc- 17 replies
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Convert curve to mesh overlapping mesh
konstantin magnus replied to Rival Consoles's topic in Modeling
Hi Rival, you could create a quad mesh from a curve by laying a grid underneath, keep only the quads that touch it, snap the outer points to the curve, smooth and extrude, bevel and subdivide. quad_mesh_from_curve.hiplc -
Hi vusta. Well, this is surely easy to setup, but not exactly light-weight. I was thinking more of something distance-based, that is just capable of cutting straight gaps through polygons. Like polycut, but able to cut through polygons twice if needed. But maybe that's it then.. gaps_polycut2.hiplc
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Here is a polysplit-based procedure to create gaps. Are there any cleaner and more reliable SOPs for this by now? gaps.hiplc
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control the shape by ramp
konstantin magnus replied to wateryfield's topic in General Houdini Questions
Cutting a grid with a curve ramp. float scale = chf('scale'); float radius = chf('radius'); int freq = chi('frequency'); float rot = radians(chf('rotate')); matrix3 m = ident(); rotate(m, rot, 2); vector pos = v@P * m; float dist = length(pos); float angle = atan(pos.x, pos.z); float angle_n = fit(angle, -M_PI, M_PI, 0.0, 1.0); float shape = chramp('shape', angle_n * freq); f@dist = (dist - radius) - shape * (scale - radius); cutting_grid.hiplc
