pddl什么时候写and
时间: 2024-04-03 15:35:15 浏览: 153
在PDDL中,"and"通常被用来同时描述多个条件。当你需要同时满足多个条件时,可以使用"and"将这些条件组合在一起。例如,在描述一个操作的前提条件时,如果需要同时满足两个条件,可以使用"and"连接这两个条件。在PDDL中,"and"通常写作"(and ...)",其中"..."代表需要同时满足的多个条件。
相关问题
上面的pddl有语法错误
非常抱歉,我在回答中犯了一个错误。以下是修正后的 PDDL 代码:
```
(define (problem crossing-river)
(:domain crossing)
(:objects farmer wolf sheep cabbage riverbank1 riverbank2)
(:init
(at farmer riverbank1)
(at wolf riverbank1)
(at sheep riverbank1)
(at cabbage riverbank1)
(at riverbank1 riverbank1)
(at riverbank2 riverbank2)
)
(:goal
(and
(at farmer riverbank2)
(at wolf riverbank2)
(at sheep riverbank2)
(at cabbage riverbank2)
)
)
(:operators
; farmer crosses river alone
(:operator cross-farmer-alone
:precondition (at farmer ?from)
:effect (and
(not (at farmer ?from))
(at farmer ?to)
(not (at ?any ?from))
(at ?any ?to)
)
)
; farmer crosses river with wolf
(:operator cross-farmer-wolf
:precondition (and
(at farmer ?from)
(at wolf ?from)
)
:effect (and
(not (at farmer ?from))
(not (at wolf ?from))
(at farmer ?to)
(at wolf ?to)
(not (at ?any ?from))
(at ?any ?to)
)
)
; farmer crosses river with sheep
(:operator cross-farmer-sheep
:precondition (and
(at farmer ?from)
(at sheep ?from)
)
:effect (and
(not (at farmer ?from))
(not (at sheep ?from))
(at farmer ?to)
(at sheep ?to)
(not (at ?any ?from))
(at ?any ?to)
)
)
; farmer crosses river with cabbage
(:operator cross-farmer-cabbage
:precondition (and
(at farmer ?from)
(at cabbage ?from)
)
:effect (and
(not (at farmer ?from))
(not (at cabbage ?from))
(at farmer ?to)
(at cabbage ?to)
(not (at ?any ?from))
(at ?any ?to)
)
)
)
)
```
感谢您指出我的错误!
为什么init不用写and
在PDDL中,"init"部分用来描述初始状态,因此通常不需要使用"and"。在"init"部分中,每个条件都被认为是同时成立的,因此不需要使用"and"来明确表示多个条件之间的关系。例如,在"init"部分中,如果需要表达一个物体在某个位置上,可以简单地列出这个条件,而不需要使用"and"来表示多个条件同时成立。因此,在"init"部分中通常不需要使用"and"。
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