isah_voodoo

@vicvvshThank you !. This is a great file to learn from. Still trying to wrap my head around how solvers work.

@SepuThank you Sepu for the file. Even though I wasn't aware of the pop stream node (which looks to be very useful), I was hoping to find a solution without having to go into a particle network. I wanted to understand the solver a little more . I thought this would be a perfect problem for a solver but from what I understand it is more complicated than it looks. I appreciate the help

Hello, I am trying to shoot particles at a red object. When the particles move through the red object, I want the particles to turn red as well. An attribute transfer will not work on its own since the particles will eventually move away from the threshold radius. So I am trying to work with a solver. I think I understand the basic concept of how a solver works, but for some reason, my particles don't move when I hook everything up. I must be missing something here. I was reading up on solver on cg wiki : http://www.tokeru.com/cgwiki/index.php?title=The_solver_sop The example "Transfer pop colour onto geometry" is pretty much what I want but opposite. Instead of the grid inheriting the particles color, I want the opposite (particles inheriting the grid color). When I switch things around inside, I still get the same problem. I am going mad I will attach my scene file for anyone that wants to take a look. Thank you. solver_particles_cd.hipnc

@devilchuThank you . I get it now. Turning off the instancing was exactly what I was looking for to make the collision work. Thanks !

@devilchu Thank you, that works. Not sure why the velocity works though. If it is naming the v attribute to v_1 ,v_2, v_3 , etc. than how is dops renaming that to vel ? In the source volume inside dops it take a v attribute and remaps it to vel. How does it know that v_1, v_2 is the attribute v ?? I managed to bring in my collision using the deforming object shelf tool ... but I'm trying to figure out how would I get my collision to work if I wanted to use the "collision" preset under initialize in the volume source in dops ? appreciate the help

here is the file clustering_vel.hip

hello I have a big problem with my pyro clustering setup. I am trying to pump some custom velocity in my smoke trail but nothing is happening. I have a basic animation of a ball moving across the screen and I used the smoke trail shelf tool to make the basic clustering network I noticed even when I bring in collision, I am not able to increase the velocity of the collision. I hope someone can shine some light on why this is happening. I'll attach my scene file for anyone that wants to take a look . Thank you.

@AndreaThank you sir

@AndreaHi andrea, thank you for your response. I did what you said and it still does not combine my vel fields together... vdb_velocity_combine2.hip

Hello, I am creating a couple of volumes with the vdb from particles node and I realized that I have no idea how to combine my velocity fields into one. I am trying to use the VDB combine and VDB vector merge . But it is not working. When I visualize my velocity field. It doesn't look right. Someone please help. vdb_velocity_combine.hip

@anim @ikoon Thanks you. This makes perfect sense now.

Hello again I come with another vex question. This time I am trying to figure out the function getbbox and store it into an attribute to see what the values are actually doing,.... The help cards states: Sets two vectors to the minimum and maximum corners of the bounding box for the geometry. void getbbox(vector &min, vector &max) So I am trying to follow this exactly. vector min; vector max; getbbox(min,max); @P.x *= (@P.y/max.y); Now, I found this simple pieces of code on the forums somewhere and it works great. However, I am trying to store the getbbox into my own attribute so I can actually see the values but when I try, it gives me an error. This is what im doing: vector min; vector max; v@myBound= getbbox(min,max); @P.x *= (@P.y/max.y); What exactly am I doing wrong here? Why does the getbbox function not let me store its values into an attribute?

@MaximumsProductionsThank you., this is a good start for me .

anyone? I know this is probably a much broader topic. but I was hoping to try and get some help on emitting the grains on one frame after it explodes. Any help would be greatly appreciated. Thank you.

hello I have a simple rbd sim exploding outwards that I want to turn into vellum grains as they explode. I have a simple set up working but the issue is that my source is emitting grains at every frame due to the creation frame being at $F. Is there a way where I can emit the grains on only one frame as the rbd is exploding ? I tried a length function to try and delete slow moving pieces but it is still emitting for a good 10 frames. I am trying to get it to emit once when the rbd piece is moving the fastest. The idea is to make the rbd pieces look like it is breaking up into a finer sand. I hope this is not a very complicated issue. I will attach my scene file for anyone that wants to take a look. Thank you rbd_into_grains.hip