Librarian 910 Posted March 13, 2021 (edited) Block ? just wonder ? Best Approche ? shader.hiplc Edited March 13, 2021 by Librarian 2 Share this post Link to post Share on other sites
konstantin magnus 1,214 Posted March 13, 2021 (edited) The measure SOP has a principal curvature direction you could use for hatching. sketch.hipnc Edited March 14, 2021 by konstantin magnus 1 1 Share this post Link to post Share on other sites
Librarian 910 Posted March 14, 2021 (edited) perfect solution Thank you @konstantin magnus Edited March 14, 2021 by Librarian Share this post Link to post Share on other sites
konstantin magnus 1,214 Posted March 14, 2021 Thanks, but I am not so sure whether this comes close to the example image you have provided. -> Most of us just trail scattered points. So would anyone know how to achieve evenly spaced strokes? https://mrl.cs.nyu.edu/publications/illustrating-smooth/hertzmann-zorin.pdf Share this post Link to post Share on other sites
Librarian 910 Posted March 14, 2021 (edited) if this with this, And I'm happy with This Edited March 15, 2021 by Librarian 2 Share this post Link to post Share on other sites
konstantin magnus 1,214 Posted March 15, 2021 (edited) On 14.3.2021 at 2:46 PM, Librarian said: Good art work! You can also make curves follow the mesh topology by choosing directions towards neighbour polygons. topo_flow.hipnc topo_flow_only_curvature.hipnc Edited March 15, 2021 by konstantin magnus 4 Share this post Link to post Share on other sites
Librarian 910 Posted March 15, 2021 Thank You Magnus Share this post Link to post Share on other sites
konstantin magnus 1,214 Posted April 10, 2021 (edited) Hand painted looking textures for low-poly models: paint_bake.hipnc Edited April 11, 2021 by konstantin magnus 3 Share this post Link to post Share on other sites
vinyvince 130 Posted April 11, 2021 On 14/03/2021 at 12:17 AM, konstantin magnus said: The measure SOP has a principal curvature direction you could use for hatching. sketch.hipnc This is nice, thanks Konstantin. I quickly did a test to combining with gradient, interesting... I guess i have to make a custom "triplanar"network to blend each gradient result for each component of my input vector to measure. ________________________________________________________________ Vincent Thomas (VFX and Art since 1998) Senior Env and Lighting artist & Houdini generalist & Creative Concepts http://fr.linkedin.com/in/vincentthomas 1 Share this post Link to post Share on other sites
supermac 0 Posted November 2, 2021 wow.. you are really incredible.. Please, what is this language in Attribute wrangle? "string direction = chs('direction'); vector pos = v@P; vector dir = point(0, direction, i@ptnum); int pts[] = array(i@ptnum); int steps = 30; float angle = 1.0; while(steps > 0 && angle > -0.1){ steps--; pos += normalize(dir) * 0.002; int prim; vector uvw; xyzdist(1, pos, prim, uvw); vector dir_old = dir; dir = primuv(1, direction, prim, uvw); angle = dot(dir_old, dir); if(angle < 0.0){ dir *= -1.0; } int pt_add = addpoint(0, pos); append(pts, pt_add); } addprim(0, 'polyline', pts);" thank you very much. bests regards Share this post Link to post Share on other sites
konstantin magnus 1,214 Posted November 2, 2021 32 minutes ago, supermac said: Please, what is this language in Attribute wrangle? It's Houdini's own shader language called VEX. Matt Estella provides an artist friendly introduction: https://www.tokeru.com/cgwiki/index.php?title=JoyOfVex The same programming can also be done visually using VOP nodes which is probably easier for starters. Share this post Link to post Share on other sites
supermac 0 Posted November 2, 2021 thank you very much.. i see that. now, i will learn all of that. I wish you a good day Share this post Link to post Share on other sites
