2d7ccc1278
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1712 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
92 lines
1.8 KiB
Plaintext
92 lines
1.8 KiB
Plaintext
=================================================================
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Logtalk - Object oriented extension to Prolog
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Release 2.28.2
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Copyright (c) 1998-2006 Paulo Moura. All Rights Reserved.
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=================================================================
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% start by loading the necessary library and support example files (if not
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% already loaded):
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| ?- logtalk_load([library(events_loader), library(types_loader), library(metapredicates_loader), library(hierarchies_loader)]).
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...
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| ?- logtalk_load(roots(loader)).
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...
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| ?- logtalk_load(relations(loader)).
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...
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% now you are ready for loading the example:
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| ?- logtalk_load(points(loader)).
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...
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% let's start with a simple point:
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| ?- point::new(Point,[position-(1, 3)]), Point::(print, move(7, 4), print).
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p1 @ (1, 3)
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p1 @ (7, 4)
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Point = p1 ?
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yes
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% same problem but with bounds on coordinate values:
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| ?- bounded_point::new(Point,[position-(1, 3), bounds(x)-(0, 13), bounds(y)-(-7, 7)]), Point::(print, move(7, 4), print).
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bounds(x) : 0,13
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bounds(y) : -7,7
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bp2 @ (1, 3)
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bounds(x) : 0,13
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bounds(y) : -7,7
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bp2 @ (7, 4)
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Point = bp2 ?
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yes
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% same problem but storing the history of coordinate values:
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| ?- history_point::new(Point,[position-(1, 3)]), Point::(print, move(7, 4), print).
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location history: []
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hp3 @ (1, 3)
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location history: [(1,3)]
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hp3 @ (7, 4)
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Point = hp3 ?
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yes
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% same problem but with bounds on coordinate values and storing past values:
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| ?- bounded_history_point::new(Point,[position-(1, 3), bounds(x)-(0, 13), bounds(y)-(-7, 7)]), Point::(print, move(7, 4), print).
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bounds(x) : 0,13
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bounds(y) : -7,7
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location history: []
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bhp4 @ (1, 3)
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bounds(x) : 0,13
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bounds(y) : -7,7
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location history: [(1,3)]
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bhp4 @ (7, 4)
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Point = bhp4 ?
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yes
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% clean up instances:
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| ?- (point, bounded_point, history_point, bounded_history_point)::delete_all.
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yes
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