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Animated Colors Cube

Tags

extension, testing

Extensions Used

  • KHR_animation_pointer

Summary

This model demonstrates animating a base color with KHR_animation_pointer.

Operations

Screenshot

screenshot

Description

This model tests the KHR_animation_pointer extension's effect on the baseColorFactor of a material. When animated, the top cube should rotate above other colored cubes, and change its own color to match the cubes below.

This model was created in Blender 4.2.0 by placing keyframes for a material's default base color and using the "Push Down Action" button in the NLA Track Editor. The glTF export settings were configured with "Animation Mode" set to "NLA Tracks" and with a checkmark placed on "Animation Pointer (experimental)".

Possible Problems

  • If the top cube moves but stays red the entire time, it may indicate that KHR_animation_pointer is not supported in your renderer.

  • If the color changes become out-of-sync with the physical motion of the cube, it may indicate that the various animation tracks are not being driven by the same clock. The movement is defined for the [0, 3] range while colors are defined for the [0, 2.5] range. This checks that the last color keyframe remains active until the movement track is complete. A similar test exists in the BoxAnimated sample without any animation pointers.

Legal

© 2024, Public. CC0 1.0 Universal

  • Ed Mackey for Everything

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