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Reword MToon UV Rotation Animation spec #410

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Oct 7, 2022
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Reword MToon UV Rotation Animation spec #410

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284add0
samples: add a sample model, VRMC_materials_mtoon UV Animation Test
0b5vr Oct 4, 2022
b1aab04
docs (mtoon): Reword the spec of uvAnimationRotationSpeedFactor
0b5vr Oct 4, 2022
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18 changes: 18 additions & 0 deletions samples/VRMC_materials_mtoon_UV_Animation_Test/README.md
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# VRMC_materials_mtoon UV Animation Test

## Screenshot

![screenshot](screenshot/screenshot.jpg)

## Description

This model is an example of the [VRMC_materials_mtoon](../../specification/VRMC_materials_mtoon-1.0/) extension.

There are three quads in this model.
Each quad has different UV animation settings.

## License Information

[VRM Public License 1.0](https://vrm.dev/licenses/1.0/)

(c) 2022 pixiv Inc.
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5 changes: 4 additions & 1 deletion specification/VRMC_materials_mtoon-1.0/README.ja.md
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Expand Up @@ -808,7 +808,10 @@ UV アニメーションの Y 方向の移動速度を指定します。
UV アニメーションの回転速度を指定します。
単位はラジアン毎秒となり、 `1.0` の場合は2π秒ごとに UV が1回転します。
UV 座標系における (0.5, 0.5) を中心に回転します。
回転方向は、 UV 座標系における反時計回りです（i.e. 画像が時計回りに動く向き）。
回転方向は、U-right・V-downのUV座標を反時計回りに回転させる方向です。

> 回転方向は [KHR_texture_transform](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_texture_transform) と同じ方向となります。
> サンプルモデル「[VRMC_materials_mtoon UV Animation Test](../../samples/VRMC_materials_mtoon_UV_Animation_Test/)」も参照ください。

- 型: `number`
- 必須: No, 初期値: `0.0`
5 changes: 4 additions & 1 deletion specification/VRMC_materials_mtoon-1.0/README.md
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Expand Up @@ -807,7 +807,10 @@ The scroll direction is in which the UV value increases positive when the value
The UV animation rotation speed.
The unit is radian per second. When the value is `1.0` , UV will turn once for each 2π seconds.
The UV rotates around (0.5, 0.5) in the UV coordinate.
The rotation direction is counterclockwise in the UV coordinate (i.e. the image rotates clockwise).
The rotation direction is in which rotates UV coordinates counter-clockwise (in U-right, V-down space).

> The rotation direction is same as [KHR_texture_transform](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_texture_transform).
> See also the sample model "[VRMC_materials_mtoon UV Animation Test](../../samples/VRMC_materials_mtoon_UV_Animation_Test/)".

- Type: `number`
- Required: No, default: `0.0`