Difference between revisions of "AGI Command Reference - Arithmetic Commands"

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'''[ 1 ]''' |
 
[[AGI Command Reference 2 - COMMANDS TO LOAD AND UNLOAD RESOURCES|AGI Command Reference 2]] |
 
[[AGI Command Reference 3 - PROGRAM CONTROL COMMANDS|AGI Command Reference 3]] |
 
[[AGI Command Reference 4 - OBJECT CONTROL COMMANDS|AGI Command Reference 4]] |
 
[[AGI Command Reference 5 - OBJECT DESCRIPTION COMMANDS|AGI Command Reference 5]] |
 
[[AGI Command Reference 6 - OBJECT MOTION CONTROL COMMANDS|AGI Command Reference 6]] |
 
[[AGI Command Reference 7 - INVENTORY ITEM MANAGEMENT COMMANDS|AGI Command Reference 7]] |
 
[[AGI Command Reference 8 - PICTURE RESOURCE MANAGEMENT COMMANDS|AGI Command Reference 8]] |
 
[[AGI Command Reference 9 - SOUND RESOURCE MANAGEMENT COMMANDS|AGI Command Reference 9]] |
 
[[AGI Command Reference 10 - TEXT MANAGEMENT COMMANDS|AGI Command Reference 10]] |
 
[[AGI Command Reference 11 - STRING MANAGEMENT COMMANDS|AGI Command Reference 11]] |
 
[[AGI Command Reference 12 - INITIALIZATION COMMANDS|AGI Command Reference 12]] |
 
[[AGI Command Reference 13 - MENU MANAGEMENT COMMANDS|AGI Command Reference 13]] |
 
[[AGI Command Reference 14 - TEST COMMANDS|AGI Command Reference 14]] |
 
[[AGI Command Reference 15 - OTHER COMMANDS|AGI Command Reference 15]] |
 
[[AGI Command Reference 16 - UNKNOWN COMMANDS|AGI Command Reference 16]]
 
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== I ARITHMETIC COMMANDS ==
 
 
Commands that operate on variables:<br />
 
 
=== increment(n); ===
 
 
The value of the variable Var(n) is incremented by one, i.e.<br />
 
Var(n) = Var(n)+1. If the value is already 255, it is left unchanged.
 
 
=== decrement(n); ===
 
 
The value of the variable Var(n) is decremented by one, i.e.<br />
 
Var(n) = Var(n)-1. If the value is 0, it is left unchanged.
 
 
=== assign(n, m); ===
 
 
Variable Var(n) is assigned the value m, i.e. Var(n) = m
 
 
=== assignv(n, m); ===
 
 
Variable Var(n) is assigned the value of Var(m), i.e.<br />
 
Var(n) = Var(m).
 
 
=== addn(n, m); ===
 
 
The value of variable Var(n) is incremented by m, i.e.<br />
 
Var(n) = Var(n) + m.
 
 
=== addv(n, m); ===
 
 
The value of variable Var(n) is incremented by the value of Var(m), i.e. Var(n) = Var(n) + m.<br />
 
[Now what happens in the above two commands on 8-bit overflow: does the result wrap over 0 or stays 255?<br />
 
I.e. is 250 + 10 == 4 or 250 + 10 == 255?]
 
 
=== subn(n, m); ===
 
 
The value of Var(n) is decremented by m, I.e. Var(n) = Var(n) - m
 
 
=== subv(n, m); ===
 
 
The value of Var(n) is decremented by Var(m), i.e. Var(n) = Var(n) - Var(m).<br />
 
[Again, what happens when the result must be negative: is<br />
 
1 - 2 == 255 or 1 - 2 == 0?]
 
 
=== lindirectn(n, m); ===
 
 
Variable Var(i) where i is the value of Var(n) is assigned a value m, i.e. Var(Var(n)) = m.
 
 
=== lindirectv(n, m); ===
 
 
Variable Var(i) where i is the value of Var(n) is assigned the value of Var(m), i.e. Var(Var(n)) = Var(m).
 
 
=== rindirect(n, m); ===
 
 
Variable Var(n) is assigned the value of Var(i) where i is the value of Var(m), i.e. Var(n) = Var(Var(m)).
 
 
=== muln(n, m); ===
 
 
Variable Var(n) is multiplied by m, i.e. Var(n) = Var(n) * m.
 
 
=== mulv(n, m); ===
 
 
Variable Var(n) is multiplied by the value of Var(m), i.e.<br />
 
Var(n) = Var(n) * Var(m).<br />
 
[What happens on overflow?]
 
 
=== divn(n, m) ===
 
 
Variable Var(n) is divided by m, i.e. Var(n) = Var(n) / m.
 
 
=== divv(n, m) ===
 
 
Variable Var(n) is divided by the value of Var(m),<br />
 
i.e. Var(n) = Var(n) / Var(m). [What happens on division by 0?]
 
 
=== random(n, m, k) ===
 
 
Variable Var(k) is assigned a random value in the range between n and m. Now let us consider the commands changing flag values. Remember that a flag can only have a value 0 or 1.
 
 
=== set(n) ===
 
 
flag(n) is set to 1.
 
 
=== set.v(n) ===
 
 
flag(i), where i is the value of var (n), is set to 1. i.e.<br />
 
flag(var(n)) = 1.
 
 
=== reset(n) ===
 
 
flag(n) is set to 0.
 
 
=== reset.v(n) ===
 
 
flag(i), where i is the value of var (n), is set to 0, i.e.<br />
 
flag(var(n)) = 0.
 
 
=== toggle(n) ===
 
 
flag(n) toggles its value.
 
 
=== toggle.v(n) ===
 
 
flag(i), where i is the value of var (n), i.e. flag(var(n)), toggles is value.
 
 
Page:
 
'''[ 1 ]'''
 
[[AGI Command Reference 2|2]]
 
[[AGI Command Reference 3|3]]
 
[[AGI Command Reference 4|4]]
 
[[AGI Command Reference 5|5]]
 
[[AGI Command Reference 6|6]]
 
[[AGI Command Reference 7|7]]
 
[[AGI Command Reference 8|8]]
 
[[AGI Command Reference 9|9]]
 
[[AGI Command Reference 10|10]]
 
[[AGI Command Reference 11|11]]
 
[[AGI Command Reference 12|12]]
 
[[AGI Command Reference 13|13]]
 
[[AGI Command Reference 14|14]]
 
[[AGI Command Reference 15|15]]
 
[[AGI Command Reference 16|16]]
 

Latest revision as of 19:51, 22 March 2019