Observe.blocks
The observe.blocks command prevents an object from crossing the boundary of a block or a conditional control line.
Syntax
observe.blocks(obj oA);
Remarks
If screen object oA was previously set to ignore blocks (using the ignore.blocks command), the observe.blocks command restores normal behavior.
In addition to observing blocks, this command will also cause objects to observe conditional control lines (pixels with priority of 1 on the priority screen).
Possible Errors
AGI does not check that screen object number oA is a valid screen object. If it is not, this command will overwrite other data on the memory heap, which may cause unexpected results, including possibly crashing AGI.
Example
<syntaxhighlight lang="agi">block(25, 25, 100, 100); [ create a block ignore.blocks(o1); [ object 1 will ignore the block ... observe.blocks(o1); [ now object 1 will observe the block ... unblock(); [ remove the block </syntaxhighlight>
Technical Information
| Required Interpreter Version: | Available in all AGI versions. |
| Byte-Code Value: | 89 (0x59 hex) |
See Also
block
unblock
ignore.blocks
Managing Obstacles
Control Lines
