NDLI: Interactive ray tracing of skinned animations

Content Provider	Springer Nature Link
Author	Günther, Johannes Friedrich, Heiko Seidel, Hans Peter Slusallek, Philipp
Copyright Year	2006
Abstract	Recent high-performance ray tracing implementations have already achieved interactive performance on a single PC even for highly complex scenes. However, so far these approaches have been limited to mostly static scenes due to the high cost of updating the necessary spatial index structures after modifying scene geometry. In this paper, we present an approach that avoids these updates almost completely for the case of skinned models as typically used in computer games. We assume that the characters are built from meshes with an underlying skeleton structure, where the set of joint angles defines the character’s pose and determines the skinning parameters. Based on a sampling of the possible pose space we build a static fuzzy kd-tree for each skeleton segment in a fast preprocessing step. This fuzzy kd-tree is then organized into a top-level kd-tree. Together with the skeleton’s affine transformations this multi-level kd-tree allows fast and efficient scene traversal at runtime, while arbitrary combinations of animation sequences can be applied interactively to the joint angles. We achieve a real-time ray tracing performance of up to 15 frames per second at 1024×1024 resolution even on a single processor core.
Starting Page	785
Ending Page	792
Page Count	8
File Format	PDF
ISSN	01782789
Journal	The Visual Computer
Volume Number	22
Issue Number	9-11
e-ISSN	14322315
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-08-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ray tracing Fuzzy kd-tree Dynamic scenes Image Processing and Computer Vision Artificial Intelligence (incl. Robotics) Computer Graphics
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Computer Vision and Pattern Recognition Software

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