34 lines
1.5 KiB
Plaintext
34 lines
1.5 KiB
Plaintext
\b;Instruction \c;turn\n;
|
|
Use the instruction \c;turn();\n; to instruct the bot to perform a rotation on itself of a certain number of degrees.
|
|
|
|
\b;Basic use
|
|
90 degreed means a quarter turn, 180 degrees means a half turn. A positive angle will perform a counterclockwise rotation, a negative angle means a clockwise rotation. Here are some examples with \c;turn();\n;:
|
|
|
|
\c;turn(90);\n; quarter turn to the left
|
|
\c;turn(-90);\n; quarter turn to the right (negative angle)
|
|
\c;turn(180);\n; half turn
|
|
|
|
In order to turn the bot towards an object found with the instruction \c;\l;radar\u cbot\radar;();\n;, you must calculate the rotation angle with the instruction \c;\l;direction\u cbot\direct;()\n;:
|
|
\c;
|
|
\s; item = \l;radar\u cbot\radar;(AlienSpider);
|
|
\s; turn(\l;direction\u cbot\direct;(item.position));
|
|
\n;
|
|
After these lines, just fire the cannon, and there is one hostile element less.
|
|
|
|
\b;For specialists
|
|
Syntax:
|
|
\s;\c;turn ( angle );\n;
|
|
|
|
Turns the bot with a given angle, right or left, without moving either forward or backward.
|
|
|
|
\t;angle: \c;\l;float\u cbot\float;\n;
|
|
Angle of the required rotation, in degrees. A positive value turns left, a negative value turns right. \c;turn(180)\n; turns round completely.
|
|
|
|
\t;Return value: \c;\l;int\u cbot\int;\n;
|
|
Zero if everything is OK, or a value different from zero if an error occurred.
|
|
\c;== 0 \n;rotation performed
|
|
\c;!= 0 \n;rotation impossible
|
|
|
|
\t;See also
|
|
\l;Programming\u cbot;, \l;types\u cbot\type; and \l;categories\u cbot\category;.
|