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logix1390

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Everything posted by logix1390

  1. Noise texture on Lava sim

    Hello,. I have a quick lava sim that I want to shade with a noise AFTER i import it. from dops.. I need the noise texture to stick with the particles as they move. After I import in the lava sim, I make my point vop and add the noise to the rest field. However, it turns black and nothing happens. I have rest fields enabled in dops. When i search this issue online, It's usually people working with uv's. Do I even need uv's to get a simple noise to stick to the particles after sim? I'll attach my scene for anyone who wants to take a look. Thank you lava_noise_rest.hip
  2. Understanding Ray VEX

    Thanks guys, I can tell this is a very deep topic. I definitely have a better perspective on it now.
  3. Understanding Ray VEX

    Hello, I am in the middle of doing a procedural modeling tutorial: http://lesterbanks.com/2017/03/procedural-modeling-houdini/ He creates a curve and manually rays it to the terrain using vex . The code is as follows: (the curve is in the first input and the terrain mesh is in the second input) vector rayD = {0,-100,0}; vector hittP, hitUVW; i@hitPrim = intersect(1, @P, rayD, hittP, hitUVW); @P = hittP; This works perfectly Now I am trying to understand what is going on here exactly and how Houdini is solving this . I searched for the intersect function in the help and found this: int intersect(int input, vector orig, vector dir, vector p&, vector uvw&) I guess what is confusing me is the "vector p&", and "vector uvw&" above and how that related to the vectors he created "vector hittP, hitUVW" . I am still a beginner in VEX ... If anyone can help me understand this, I would really appreciate it. I will also attach my scene file for anyone that wants to take a look. Thank you! Ray_VEX.hip
  4. Change color in VOPS

    I have a rather noob question ... I have red spheres copied onto a grid. I want to change the color to Blue using VOPS. after the copy.. I can do it in vex easily, but im not sure why it's not working in vops. I tried a few things... the set vector component seemed promising according to the help card, but i'm not sure how to use it exactly. I'll attach my scene file for anyone who wants to take a look. Thank you.
  5. Drag by Proximity -Particles

    Hello, So I have some particles flying around an animated sphere. I want these particles to slow down as it moves away from my sphere. I noticed in the preset vex expressions for drag it has a "Drag by Proximity to Point" expression. However, I am having a tough time understanding this... // Drag by Proximity to Point vector target = {0, 1, 0}; // Target position float dist = length(@P - target); // distance to target float radius = 2.0; // Effect radius dist = fit(dist, 0, radius, 0, 1); // fit to range airresist *= dist; -------- Question: vector target = {0, 1, 0}; <<<---- where exactly is this y value ? Is this y value in relation to my animated object ? How can I set my target to be the centroid of my emitter dist = fit(dist, 0, radius, 0, 1); <<<---- how is the distance and radius related in regard to a fit function ? I'm wondering if there is any easier way to get my particles to slow down as it moves away from my emitter and almost look like it is following my object. I know a pop attract will work, but it takes a while to get the correct settings.. Thank you
  6. Drag by Proximity -Particles

    Hi Sepu, Thanks for the tips, I think i got it working now.
  7. Change color in VOPS

    thank u sepu
  8. Change color in VOPS

    Sorry, here is the file. change_red_to_blue_vops.hip
  9. Glue Constraints not falling with gravity

    Thank you Dam, works perfectly.
  10. Hello, I have several floors of a building that I am destroying as part of a destruction project I am working on. I notice that all of the floors stay static in space and are not affected by gravity. It is weird, because all of my other elements (bricks, wood, concrete, etc..) simulate perfectly.. I even imported only one floor and that stays static in space as well. I was hoping the floors will all fall down and break based on how strong the constraint is.... It seems like the constraints are taking priority over gravity.. I will attach my scene for anyone who wants to take a look. Thank you. constraints_not_falling.hip
  11. Concave Geometry-Boolean Fracturing

    Hello , I have a fractured a box using the boolean method in Houdini 16.... It simulates perfectly when using convex hull for the collision. However, when I switch to concave , Houdini crashes every time. It only crashes when I have a mountain sop added to the grids that are cutting up the geo. If I turn off the mountain sop, it simulates perfectly with concave. I kind of fixed this by remeshing each piece in a for loop, however it is really slow and all my pieces look way different. I wanted to know, if there was an updated method for properly simulating with concave, specifically with Boolean fracturing . I am destroying a building, and corner pieces that involve all sides of the walls wont work well with convex hull so concave is needed for accurate collisions. Any suggestions, or tips would be greatly appreciated. I will attach my test file for anyone that wants to take a look. Thank you. rbd_convex_concave_rd.hip
  12. Concave Geometry-Boolean Fracturing

    Thanks guys, both methods worked perfectly. Appreciate the help.
  13. Slow Motion -Deleted Geometry

    Hello, I have come across an interesting problem. I have a basic scene with a grid and a mountain applied to it. I animated the grid in a very simple way. After that, I applied a colored noise to the grid and deleted the geometry by color. However, When I try and slow the animation down using a time blend and time warp, The geometry becomes very messed up and cross over each other. It Seems like the points are not interpolating properly between frames. If I turn off the Colored Noise and Delete nodes, everything works correctly. I have been scratching my head at this weird interpolation issue for some time.. I will attach my scene file for anyone who wants to take a look. Thank you -logix Slow_Motion_Deleted_Geo.hip
  14. Boolean Fracture Pieces

    Hello, I am currently fracturing a simple wall using H16 new Boolean fracture. I noticed that the pieces it spits out are not actually a full pieces of geometry. Each chunk are missing the sides compared to the Voronoi fracture pieces. How do I get full geometry out of each chunk when using the Boolean method ? Should I go into a foreach and bridge the sides ? There must be an easier way. I will attach some pictures and my file for anyone interested Thank you boolean_pieces_vs_voronoi_pieces.hip
  15. Boolean Fracture Pieces

    YES. It worked! Brilliant. Thanks again Noobini.
  16. Slow Motion -Deleted Geometry

    Hello, I have come across an interesting problem. I have a basic scene with a grid and a mountain applied to it. I animated the grid in a very simple way. After that, I applied a colored noise to the grid and deleted the geometry by color. However, When I try and slow the animation down using a time blend and time warp, The geometry becomes very messed up and cross over each other. It Seems like the points are not interpolating properly between frames. If I turn off the Colored Noise and Delete nodes, everything works correctly. I have been scratching my head at this weird interpolation issue for some time.. I will attach my scene file for anyone who wants to take a look. Thank you -logix
  17. Slow Motion -Deleted Geometry

    ahh I see, Thank you Sepu
  18. Slow Motion -Deleted Geometry

    Slow_Motion_Deleted_Geo.hip
  19. Slow Motion -Deleted Geometry

    Damn, sorry for the double post, not sure why that happened again..
  20. Preview button missing ?

    Hello, This might be a silly question. I noticed that my Preview button is missing in Houdini 16.557 . It automatically does a preview render and not a full quality render if you know what I mean... I don't know if this is because i recently installed redshift or they took it out in Houdini 16. I never noticed this before.. I'll attach a picture. I am trying to render with Mantra not Redshift.
  21. Preview button missing ?

    Perhaps...or larger eyes with 4k vision
  22. Preview button missing ?

    LOL wow. thanks
  23. Hello, I came across an issue where I open up Houdini 16 and none of the buttons get loaded. The error messages I get are like this : 'C:/Users/tom/Documents/houdini16.0/config/Icons/SVGIcons.cache' corrupted? warning: failed to load 'BUTTONS_colors.svg' 'C:/Users/tom/Documents/houdini16.0/config/Icons/SVGIcons.cache' corrupted? warning: failed to load 'BUTTONS_listview.svg' .... pretty much half the list of buttons in houdini are missing I tried re-installing and still I get this error. I was looking at this forum where the guy had the same issue: https://www.sidefx.com/forum/topic/37267/ However , they were syaing to rename the 'houdini' folder to 'houdiniOLD' or something, but when I do that , Houdini does not automatically create it again to reset. Is there a specific folder I should rename/delete so that Houdini resets itself Any help would be greatly appreciated , Thank you.
  24. Buttons not loading in Houdini 16.0.557

    It worked, i was renaming the houdini folder in the wrong path. Thank u for the help
  25. Buttons not loading in Houdini 16.0.557

    Anyone ?? Please someone help me on this, it's very important.
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