NPR Animation Starcraft in Cartoon Speaker: Shuen-Huei Guan 2001/1/8

Keywords NPR Non-Photorealistic Rendering Cartoon Rendering Toon Shader Pen and Ink Cel-look, cel-shading

Motivation NPR is slow for real-time rendering. So we decided to render it slowly and make it a clip of animation. And we love Starcraft! (Don ’ t tell me you ’ ve never heard of it!) Then we got a cool idea: remake a piece of classical animation in Starcraft with new(cute, cartoon) modeling, and of course in NPR cartoon effects! Isn ’ t that funny?

NPR: Non-Photorealistic Rendering Comparing Photorealism and NPR PhotorealismNPR ApproachSimulationStylization CharacteristicObjectiveSubjective InfluencesSimulation of physical processes Sympathies with artistic processes; perceptual- based AccuracyPreciseApproximate DeceptivenessCan be regarded as “ dishonest ” Honest Level of detailConstant level of detailCan adapt level of detail across an image to focus the viewer ’ s attention Good for representingRigid surfacesNatural and organic phenomena

Some Inclusions of NPR Painterly Rendering Sketching, Pen-and-Ink, Engraving Rendering for Legibility Other Rendering Styles Stylized Halftoning Toon Shaders/Plug-Ins Silhouettes Real Time Techniques

An Example of NPR – Painterly Rendering

An Example of NPR – Sketches and Lines

An Example of NPR – Special fx with half-toning

Other Examples of NPR

Progress Pre-Production Cartoon Render Cinema Decomposition Camera Control Timing Post-Production 3D Modeling SFX AVI format Post-Process

Cartoon Rendering Def : Contour Line & Discrete Shading Focus : Contour(Silhouette) & Shading Line by Object Shading by Light

Cartoon Demo

Contour Def: Line between front face & back face. Char: Frame Coherence & Line Continuity. Method: Brute Force. Geometry Division. Modified Appel ’ s Algorithm Special: Perlin Noise Function.

Shading Method: Angle between normal vector & light source. Shading table. Modified interpolation. Shading mapping.

Shading mapping

Animation: Production&Reproduction Animation Design Focus ： Pre process Settings: Original Video Animation (OVA) Script & Tran Script Post process Production: Determine the Stage Model Design Camera Tran Script Light Settings Difference /w Reproduction （ Re ’,always easier ）

Reproduction Design Focus ： Precise Section Analysis Fade in/out, Section Time Line, Determine object movement Guess the Positioning of the Stage True or False? （ Not exactly, but still correct ） Real Working Design Models for Replacing Original Ones. Sym Tran Script of Cameras, Lights Detail Corrections

Reference SIGGRAPH 95~2000. For Cartoon Rendering: Cartoon Rendering, March, 2000, Game Developer magazine. Non-Photorealistic Rendering (Toon), Game Developers Conference CartoonReyes on 3DS Max. For AVI format: MSDN Library

Future Work More NPR effects More special effects(SFX) in production of animation. Partial Collision Detection. Model Picking in 2D.

Author B , Ping-Chun Kuo ( windforce) B , Shuen-Huei Guan (Drake) B , Chuan-Chien Lin ( just4u) 2001/1/8