An Octree-based proxy for collision detection in large-scale particle systems - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Journal Articles Science in China Series F: Information Sciences Year : 2013

An Octree-based proxy for collision detection in large-scale particle systems

Wenshan Fan
  • Function : Author
Bin Wang
  • Function : Author
  • PersonId : 758908
  • IdRef : 195514718


Particle systems are important building block for simulating vivid and detail-rich effects in virtual world. One of the most difficult aspects of particle systems has been detecting collisions between particlesand mesh surface. Due to the huge computation, a variety of proxy-based approaches have been proposed recently to perform visually correct simulation. However, all either limit the complexity of the scene, fail toguarantee non-penetration, or are too slow for real-time use with many particles. In this paper, we propose anew octree-based proxy for colliding particles with meshes on the GPU. Our approach works by subdividingthe scene mesh with an octree in which each leaf node associates with a representative normal correspondingto the normals of the triangles that intersect the node. We present a view-visible method, which is suitable forboth closed and non-closed models, to label the empty leaf nodes adjacent to nonempty ones with appropriateback/front property, allowing particles to collide with both sides of the scene mesh. We show how collisionscan be performed robustly on this proxy structure in place of the original mesh, and describe an extension thatallows for fast traversal of the octree structure on the GPU. The experiments show that the proposed methodis fast enough for real-time performance with millions of particles interacting with complex scenes.
Fichier principal
Vignette du fichier
e_ae_a_2013a_a_a_c_a_.pdf (380.87 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-00920666 , version 1 (19-12-2013)



Wenshan Fan, Bin Wang, Jean-Claude Paul, Jiaguang Sun. An Octree-based proxy for collision detection in large-scale particle systems. Science in China Series F: Information Sciences, 2013, 56 (1), pp.1-10. ⟨10.1007/s11432-012-4616-5⟩. ⟨hal-00920666⟩
369 View
7618 Download



Gmail Facebook X LinkedIn More