Drughi

Why not bake it? You will need uvs. But once you have them - Houdini has an awesome bake function. No need for complex uvs and selecting uv-seams. Just use auto-seam. https://www.sidefx.com/docs/houdini/nodes/sop/uvautoseam.html https://www.sidefx.com/docs/houdini/nodes/out/baketexture.html

Hi magicans! What does lambda mean in conjunction with PBD / Pop fluids?

Mattias Lagergrens Highly Detailed Fluid Simulations on the GPU with Houdini http://webstaff.itn.liu.se/~jonun/web/teaching/2010-TNCG13/Lectures/OceansWithMathMattias.pdf

Hey magicans, I´m trying to understand FEM to make some contracting geometry. I´ve checked several example Files online worm-locomotion-with-fem and vimeo.com/258434651 . But all of them are not working. Animating restP and baseP in a Sop-solver (wired to multisolver) has no effect (vertices or point attrib). Are those files working for you?

You are right! But it is a bit confusing. With smoke it is working this way and also I remember to have done this successfully with flip.

I was facing the same problem recently. I just used a sop solver instead. Object merge your v source to the sop solver and add it to vel.

Sop Solver is different to the solver on sop level. No. The Dopnet itself is taking care of this. The sop solver basicly allows u to use sops inside of dops, wich is very mighty.

Make sure the output folder exists.

Hey! this is something I'm interested in as well. I think if you check the GuidedRBDBulletSolver example files the answer should be burried in this setup, but I haven't had the time to dig deeper. I think this is the relevant wrangle (/obj/guidedrbdbulletsolver_example1/animated_guide_simulation/rbdbulletsolver4/dopnet/guide_geometry): int dotQuat(vector4 q1; vector4 q2){ int dotQ = (q1.w*q2.w+q1.x*q2.x+q1.y*q2.y+q1.z*q2.z) < 0; return dotQ; } // Unguide pieces with no guided neighbours int useneighbours = point(0, "__guide_useneighbours", @ptnum); int guide_count = point(0, "__guide_neighbourcount", @ptnum); if (chi("useneighbours") && guide_count && useneighbours) { int ns[] = point(0, "__guide_neighbours", @ptnum); int newns[]; foreach(int n; ns) { int guided = inpointgroup(0, "__guided", n); if (guided) append(newns, n); } setpointattrib(0, "__guide_neighbours", @ptnum, newns); int num = len(newns); if (num < min(guide_count, chi("minneighbours"))) { i@group___guided = 0; return; } } int pt = findattribval(1, "point", "name", s@__guide_name, 0); if(pt >= 0) { vector restpos = primintrinsic(0, "pivot", @primnum) + v@__guide_pivot_offset; int pr1 = pointprims(1, pt)[0]; vector restpos1 = primintrinsic(1, "pivot", pr1); vector pos1 = point(1, "P", pt); vector offset = restpos - restpos1; matrix3 xform1 = primintrinsic(1, "transform", pr1); vector pos = pos1 + offset * xform1; float timeMult = 1.0/@TimeInc; timeMult *= 1.0/chf("timescale"); matrix3 xform = primintrinsic(0, "transform", @primnum); rotate(xform, v@__guide_rot_offset, 0); vector4 quat = quaternion(xform); vector4 quat1 = quaternion(xform1); int reverse = dotQuat(quat1, quat) ? -1 : 1; quat *= reverse; if(i@active && s@__guide_name!="") { float bias = ch("bias"); if (haspointattrib(0, "__guide_blend")) bias *= clamp(float(point(0, "__guide_blend", @ptnum)), 0, 1); v@w = lerp(v@w, qconvert(qmultiply(quat1, qinvert(quat))) * timeMult, bias); v@v = lerp(v@v, (pos - @P) * timeMult, bias); int hasAdiff = haspointattrib(0, "__guide_angleDiff"); int hasLdiff = haspointattrib(0, "__guide_linearDiff"); if(hasAdiff && hasLdiff) { setpointattrib(0, "__guide_prP", @ptnum, pos, "set"); setpointattrib(0, "__guide_prQ", @ptnum, quat1, "set"); } } } else { i@group___guided = 0; }

Hi Michal, does this help? Pop_Follow_Surface_003.hiplc

my_solver.hipnc

To do this the right way take a look into the gas wind. The quick and dirty way is to simply advert the fields with you force, but this is not recommended, because it leads to wrong velocities.

Ah, your right better to use a dictionary. probably you need to add the script to the "code" paramterer defaults. But Tomas is right - better embed the code to a hda. The way I did it (this code parameter) is more of a hack to be able not to use a hda.

If you want to keep it a subnet. This is the way to go. DropdownToChangeValues_fix.hipnc In the sliders working geo

You will need a python script for this to work. Do you want to make a hda or keep it a subnet?