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konabot/konabot/docs/user/march.txt
2026-04-27 15:28:13 +08:00

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# 指令介绍
简易 Raymarch 小玩具
用法march `<scene>`
march sphere(1).color(red) box(0.5, 2.0, 0.5).pos(0, 0, 0) cam(0.5).pos(-5).lookat(0)
# 主要语法
`<scene>` ::= `<scene>` "." `<op>` |`<obj>`
`<obj>` ::= `<obj_ty>` | `<obj_ty>` "(" <args> ")"
`<op>` ::= `<op_ty>` | `<op_ty>` "(" `<args>` ")"
`<args>` ::= `<args>` "," `<arg>` | `<arg>`
其中 `obj_ty`、`op_ty` 分别为物体类型(如 `cube`、`sphere`、`torus` 等)与变换类型(如 `pos`、`rot`)。
# 支持的物体
目前支持的物体有(不包含 alias
`cube`:可选参数长宽高
`sphere`:可选参数半径
`torus`:可选参数半径与粗细
`cylinder`:可选参数半径与高度
`capsule`:可选参数高度与半径
特殊物体:
`camera`:可选参数焦距
# 支持的变换
目前支持的变换有
`pos`
`rot`
`color`
`lookat`
# 特殊说明
`<op_ty>` 不包含 scale。非正交的变换会破坏 SDF 的性质。