fencer

For example, convert sphere to volume and do volume mix operation.

cross product for beginning @up = {0,1,0}; @N = cross(@up, @N);

Several ideas. sphere_volume_shell_color_v01.hipnc

Looks like you are trying to overcomplicate your task. Use standard techniques in particles sourcing according to reference and play with pyro look. Add more substeps because of fast motion. That's all.

Align To - Which primitive to align to. If blank aligns to first primitive in the auxiliary input.

Hm, if you need to get current loop number you should ask for "iteration" in second block. detail("../block_begin1_n", "iteration", 0)

Check how it works. https://www.sidefx.com/docs/houdini/model/looping.html

Try to go from edge to center and control position shift amount based on that. TEST_v02.hipnc

Try stamp with random rotation. bathroom_wall_v01.hipnc

Try rivet

How about calculate real size of every letter and shift based on it? Looks like you are trying to do the same but I am not sure about your idea. ltower_v01.hipnc

Again, check shelf tool "billowy smoke". You are using very low gas dissipate, smoke almost stay forever, at the same time there are no forces to move this smoke except gasdisturb and turbulence which tearing it apart. Main motion of smoke is Buoyancy (which based on temperature) or wind, in your case temperature disappears very fast, Buoyancy stop working, smoke not rising anymore but gasdisturb keep working. Find a good reference and examine real behaviour.

Good, right step, you are close. Use Visualization in gasdisturb to see where forces are still present. Play only with gasdisturb1 first, disable the rest, adjust one than add one more, adjust and so on. Play with control range, you are adding high values of gasdisturb but trying to limitate only from range 0-1, try 0-5, 0.1-2 or so... Plus now limit only by velocity, try to add density as well.

Straight idea is to shift by size dependence and cut the rest. But for procedural way need to find out how to calculate font size properly, with uppercase and line spacing. typewriter_v02.hipnc

Check help about Control Field. Right now your Disturb and Turbulence doesn't have influence limit, they apply forces everywhere where density is. Use Control field to limited this, for example by temperature or density. https://www.sidefx.com/docs/houdini/nodes/dop/gasdisturb.html Create an explosion or billowy smoke from the shelf and examine what inside.