4.5 Discussion of sample LOGIC code from KQ4
Last updated: 31 August 1997
Kings Quest IV: Room 7
Some of you may know that "The Official Book of King's
Quest" included three small fragments of AGI code for ROOM 7
in the AGI version of KQ4. These fragments are given below along
with the same fragments taken from the game itself. There are a
few differences which is to be expected but generally the code is
very similar. These examples show how the coder wrote the code
and what it now looks like in the final product. I've included a
few comments where some interesting observations can be seen.
Animating the smoke
FROM THE BOOK
animate.obj( smoke);
ignore.horizon( smoke);
set.view( smoke, v.fish.cabin);
set.loop( smoke, 1);
ignore.blocks( smoke);
position( smoke, 95, 16);
work = 3;
step.time( smoke, work);
cycle.time( smoke, work);
draw( smoke);
FROM THE GAME
animate.obj(7);
ignore.horizon(7);
set.view(7, 114);
set.loop(7, 1);
ignore.objs(7); [ These two lines have been added.
set.priority(7, 5); [
ignore.blocks(7);
position(7, 95, 16);
assignn(152, 3); [ Equivalent to 'work = 3;'
step.time(7, 152);
cycle.time(7, 152);
draw(7);
COMMENTS
Opening the door
FROM THE BOOK
if (said( open, door)) { [ must be close enough
if (posn( ego, 86, 120, 106, 133)) {
if (!night) {
if ( door.open) {
print("The door is already open. . .
}
else {
set( game.control);
set.priority( ego, 11);
start.update( door);
end.of.loop( door, door.done);
}
}
else {
print("You can't -- it's locked...
}
}
else {
set( notCloseEnough);
}
}
FROM THE GAME
if (said(OPEN, DOOR||DOORS||DOORWAY||DOORWAYS)) {
if (posn(0, 86, 120, 106, 133)) {
if (!isset(38)) {
if (isset(231)) {
print("The door is already open.");
}
else {
set(36);
prevent.input();
start.update(5);
assignn(152, 3);
cycle.time(5, 152);
end.of.loop(5, 232);
sound(70, 154);
}
}
else {
print("You can't. It's locked and you
don't have the key.");
}
}
else {
set(113);
}
}
Unlocking the door
FROM THE BOOK
if (said( unlock, door)) { [must be close enough
if (posn( ego, 86, 120, 106, 133)) {
if (!night) {
print("The door is already unlocked. . .
}
else {
printf("You can't, it's locked. . .
}
}
else {
set( notCloseEnough);
}
}
FROM THE GAME
if (said(UNLATCH||UNLOCK, DOOR||DOORS||DOORWAY||DOORWAYS)) {
if (posn(0, 86, 120, 106, 133)) {
if (!isset(38)) {
print("The door is already unlocked.");
}
else {
print("You can't. It's locked and you
don't have the key.");
}
}
else {
set(113);
}
}
Knocking on the door
FROM THE BOOK
if ((said( knock, at, door) || said( knock) ||
said( knock, on, door) || said( knock, door)) {
if (posn( ego, 86, 120, 106, 133)) {
if (!night) {
print("You knock on the door. . .
a woman says. . .
}
else {
printf("You knock on the. . .
a man calls out. . .
}
}
else {
set( notCloseEnough);
}
}
FROM THE BOOK
if (said(BANG||KNOCK||RAP||TAP) ||
said(BANG||KNOCK||RAP||TAP, DOOR||DOORS||DOORWAY||DOORWAYS)) {
if (posn(0, 86, 120, 106, 133)) {
if (!isset(38)) {
print("You assertively knock on the shanty
door. A woman's voice answers, "Jest come on in!"");
}
else {
print("You assertively knock on the shanty
door. From inside, a man's voice calls out, "D'ya know
what TIME it is?! GO AWAY!!"");
}
}
else {
set(113);
}
}
Fall rocks
FROM THE BOOK
if (hit.special) {
if ((rf2 || rf3 || rf4)) {
reset(hit.special);
get.posn(ego, priorx, priory);
position.f(dude, priorx, priory);
ignore.blocks(dude);
set( game.control);
set.view( dude, v.ego.land);
if ((ego.dir == 3 || ego.dir == 4)) {
set.loop( dude, 2);
}
else {
set.loop( dude, 3);
}
fix.loop(dude);
work = 3;
step.size( dude, work);
work = 3;
cycle.time( dude, work);
start.cycling(dude);
erase(ego);
draw(dude);
if (rf3) {
work6 = 0;
move.obj.f( dude, tempx, tempy, work6, fall.done);
}
if (rf4) {
work6 = 0;
move.obj.f( dude, tempx, tempy, work6, fall.done);
}
if (rf2) {
if (priory < 125) {
set.priority( dude, 9);
tempy=132;
work6=0;
move.obj.f( dude, ego,x, tempy, work6, fall.done);
}
else {
set.priority(dude, 15);
tempy = 156;
work6 = 0;
move.obj.f( dude, ego.x, tempy, work6, fall.done);
}
}
}
}
FROM THE GAME
if (isset(3)) { [ hit.special
if (isset(222) || isset(223) || isset(224)) { [ rf2, rf3, rf4
reset(3);
sound(51, 154);
get.posn(0, 134, 135);
position.v(12, 134, 135);
ignore.blocks(12);
set(36);
prevent.input();
set.view(12, 11);
if (equaln(6, 3) || equaln(6, 4)) {
set.loop(12, 2);
}
else {
set.loop(12, 3);
}
fix.loop(12);
assignn(152, 3);
step.size(12, 152);
assignn(152, 3);
cycle.time(12, 152);
start.cycling(12);
erase(0);
draw(12);
if (isset(223)) {
assignn(158, 0);
move.obj.v(12, 107, 108, 158, 226);
}
if (isset(224)) {
assignn(158, 0);
move.obj.v(12, 107, 108, 158, 226);
set.priority(12, 14);
}
if (isset(222)) {
if (lessn(135, 125)) {
set.priority(12, 9);
assignn(108, 132);
assignn(158, 0);
move.obj.v(12, 33, 108, 158, 226);
}
else {
set.priority(12, 14);
assignn(108, 158);
assignn(158, 0);
move.obj.v(12, 33, 108, 158, 226);
}
}
}
}
