bunker

you can also use hscript directly in the parameter field: if($F>=5 && $F<=10,10,0)

complement node? (1-x) you can also use a fit VOP: 0-1 > 1-0

there is a "control field" on the gas disturb node. You can get a "speed" field with the gasmatchfield + gasanalysis microsolvers disturb_on_speed.hipnc or you can build disturbance directly is a gaswrangle node: vector4 hvec; vector _div = (v@P + rand(f@Frame+chf("seed")) * chf("divscale"))/chf("divscale"); hvec = _div; setcomp(hvec, f@Frame, 3); vector disturbance = vector(random(hvec))*2-1; v@vel += disturbance * length(v@vel) * chf("disturbance_amount");

Thanks Jiri! yes this is exactly what I was looking for - just never had the time to do it myself. Would be great if Sidefx added this feature

I would go for an intel i9, much better value: https://www.cpubenchmark.net/high_end_cpus.html And you'll save money not buying ECC memory. Go for 64GB of RAM minimum, or 128GB. In my experience Houdini doesn't crash less with ECC memory.

*@Cd.x is the problem, it converts your 3D noise into 1D noise you can add an explicit vector casting: *vector(@Cd.x) // I also added some parameters for: frequency/offset/amplitude @P+= onoise(@P*chf("freq")+chv("offset"),chi("turb"),ch("rough"),ch("atten"))*vector(@Cd.x)*chf("amp");

you were missing the indent block after the "if" statement: render_all_mantra_rop_fixed.hipnc

you're missing the geometry path or input the correct syntax should be: vector bmin,bmax; //creates 2 empty vectors getbbox(0,bmin,bmax); //get bounds and stores the values in the 2 vectors variables (the 0 is for first input) if you want to see the values in the geo spreadsheets, you can export attributes like this: v@bmin = bmin; v@bmax = bmax; note that min is a vex function so it's confusing to name a variable that way. hope that helps

You can't use @ratio directly in a paramater you have to use a detail hscript expression instead: detail(opinputpath(".",0),"ratio",0) or you can scale directly in vex if you run over points instead of detail vector size = getbbox_size(0); @P *= size.x/size.z;

You can filter out lone points before meshing using pcopen+pcnumfound vex functions: // eg: search for 30 points within a radius, if less are found they are on their own, delete them. int handle = pcopen(0,"P",@P,chf("radius"),chi("maxpoints")); if(pcnumfound(handle)<chi("maxpoints")){ removepoint(0,@ptnum); } // same in shorter form //if(pcnumfound(pcopen(0,"P",@P,chf("radius"),chi("maxpoints")))<chi("maxpoints"))removepoint(0,@ptnum); filter_lone_points_bunker_01.hipnc

And a simple example file attached this time... lidar2heightfield_bunker_01.hipnc

You can also use a volumefromattrib SOP to copy the height to the volume

pop wrangle node: # set life to 1 second f@life = 1;

hard to tell without a hip file.

good stuff, and simple too.