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AnyImage/openspec/changes/archive/2026-09-17-use-world-space-cutout-edge-length/proposal.md
nan 076a8c90f1 Add specifications for two-times upscale and unified depth plane features
- Introduced the two-times upscale specification detailing requirements for unified output, fixed model presets, arbitrary dimensions, and consistent job behavior.
- Added scenarios for existing models, repeated upscale, and handling of alpha preservation.
- Created the unified depth plane specification outlining geometry modes, stable interface, and asset evaluation.
- Defined scenarios for mode switching, relief and camera preservation, and validation of delivered assets.
2026-09-17 17:19:05 +08:00

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Why

Cutout 的 Mesh Detail 使用源图像像素间距,用户难以从 Image Empty 的外观预判生成密度。改用场景物理长度,让网格密度由明确的目标边长控制,并通过裁切区域的相对尺寸限制生成成本。

What Changes

  • BREAKING:将 Mesh Detail 枚举替换为带长度单位的 Edge Length 浮点参数,初始默认值为 0.1 m。
  • 按世界变换和场景 Unit Scale 计算采样间距,图片分辨率与画布大小不参与密度定义。
  • Preferences 使用 Minimum Relative Edge Length 百分比替换 Maximum Cutout Mesh Resolution,默认 1%;实际间距取用户长度与裁切包围盒世界长边乘比例的较大值。
  • 普通轮廓与 Fine Outline 共用有效间距语义;相对限制作用于目标采样间距,轮廓适配允许更短的边。
  • 限制生效时展示实际采用的目标长度。

Capabilities

New Capabilities

  • cutout-edge-length: Cutout 的物理目标边长、相对密度限制及一致的采样与界面行为。

Modified Capabilities

无。当前 openspec/specs 下无已归档能力规范。

Impact

涉及 properties.py、preferences.py、cutout_tool 的交互、Operator、几何与 Fine Outline 采样链,以及相关注册、偏好与几何测试。移除旧枚举映射、像素间距协议和旧密度上限入口;无需新增依赖。