Coordinated Particle Tracing

Presenter: Chujia Wei School of Computer ScienceCarleton UniversitySupervisor: David MouldCoordinated Particle Tracing1Introduction2Stylized images

Images created by scratchboard.2Technique Particle system3Attributes such asPositionSpeedDirection

DynamicsMove according to speed and directionUpdate attributes over time

34Conventional particle system

Technique Particle tracingCreated by l. karluk

Created using Flame Painter45Parallel curvesCoordinated movement

Figures are created by scratchboard. Technique Coordinated particle tracing56

Parallel Curvesby Sol LeWitt.67Additional attributeNeighbor ID (for coordination)

Additional dynamicsCoordinate with neighborsTechnique Coordinated particle tracing7Related work8RenderBotsMulti Agent Systems for Direct Image Generation, S. Schlechtweg, T. Germer and T. Strothotte, 2005.

Artistic Tessellations by Growing Curves, H. Li and D. Mould, 2011.81. RenderBotsMulti Agent Systems for Direct Image Generation9EdgeBots.

910HatchingBots.

102. Artistic Tessellations by Growing Curves11

Figure: created by Li and Mould.11Other applications12Creating natural images/textures.

12Other applications13Example of creating mushroom gills.

13Algorithm14Basic rules Coordinated moving system

ABCD14Algorithm15Birth and death

Birth: generate new particles from an existing one.Death: merge one particle with its neighbor.15Using input images (plan)16Match tonesParticle spacing based on intensity

Created by photoshop1617

Emit particles at proper positionEmit at edges/ stipple pointsRight figure: created by Mould1718Shape objectsGradient based direction

Right figure: created by Li and Mould18References19[1] H. Li and D. Mould, Artistic Tessellations by Growing Curves, Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Non-Photorealistic Animation and Rendering, page 125-134, 2011.[2] S. Schlechtweg, T. Germer and T. Strothotte, RenderBotsMulti Agent Systems for Direct Image Generation, Computer Graphics Forum, 2005.19Thank you!

Questions?2020