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You want to add a
motorbike run to you
game, like in Project
Weltuntergang? Here's
how to do it, by
Kuki:
*WL_DEF.H
-add this to the
gamestate structure:
boolean mbike; // is the
player riding on the
mbike
int motospeed; // what's
the bike's speed
boolean left; // are you
turning left
boolean right; // are
you turning right
*WL_GAME.C
- in SetupGameLevel add:
(it sets mbike to true,
left & right to
false and motospeed to 0
on certain level(s))
if (!loadedgame)
{
gamestate.TimeCount=
.
.
.
gamestate.treasurecount=0;
+if (gamestate.mapon==0
&&
gamestate.episode==0) //
first level, first
episode
+{
+gamestate.mbike=true;
+gamestate.motospeed=0;
+gamestate.left=false;
+gamestate.right=false;
+}
+else
+gamestate.mbike=false;
}
*WL_AGENT.C
- in T_Player add: (no
use (doors, elevators,
secrets), fire or weapon
change on a mbike)
+if
(gamestate.mbike!=true)
{
CheckWeaponChange();
if
(buttonstate[bt_use]...
.
.
.
Cmd_Fire ();
+ }
- in ControlMovement
add: (the most improtant
part - driving the
bike)
//
// side to side move
//
+ if
(gamestate.mbike!=true)
// no strafe on a
mbike
+ {
if
(buttonstate[bt_strafe])
{
//
// strafing
//
//
if (controlx > 0)
{
angle = ob->angle -
ANGLES/4;
if (angle < 0)
angle += ANGLES;
.
.
.
.
angle = ob->angle +
ANGLES/2;
if (angle >=
ANGLES)
angle -= ANGLES;
Thrust
(angle,controly*BACKMOVESCALE);
// move backwards
}
+ }
+ else
+ {
+ if (controlx > 0)
// this section sets
left & rigth to
true/false depending on
the keys that player
presses
+ {
+
gamestate.left=true;
+
gamestate.right=false;
+ }
+ else if (controlx <
0)
+ {
+
gamestate.left=false;
+
gamestate.right=true;
+ }
+ else
+ {
+
gamestate.left=false;
+
gamestate.right=false;
+ }
+
+ anglefrac +=
controlx*.5; // turning
- you may adjust this
line and/or add some
gamestate.motospeed
dependencies
+ angleunits =
anglefrac/ANGLESCALE;
+ anglefrac -=
angleunits*ANGLESCALE;
+ ob->angle -=
angleunits;
+
+ if (ob->angle >=
ANGLES)
+ ob->angle -=
ANGLES;
+ if (ob->angle <
0)
+ ob->angle +=
ANGLES;
+
+ if (controly > 0 )
// brakes
+ {
+ if
(gamestate.motospeed>controly)
+
gamestate.motospeed-=controly*2;
+ else if
(gamestate.motospeed>=0-controly)
+
gamestate.motospeed=0;
+ else
+
gamestate.motospeed+=controly*2
+ SD_PlaySound (DIESND);
//use some BRAKESND
instead, this may cause
problems, not well
tested!!!
+ }
+ else if (controly <
0) // accelerate
+ {
+ if
(gamestate.motospeed<30000)
+
gamestate.motospeed-=controly*.5;
+ else
+
gamestate.motospeed=30000;
+ SD_PlaySound
(HITWALLSND); //use some
ENGINESND instead, this
may cause problems, not
well tested!!!
+ }
+ else // no keys
pressed - bike slowly
reduces it's speed
+ {
+ if
(gamestate.motospeed<0)
+
gamestate.motospeed+=10;
+ else if
(gamestate.motospeed>0)
+
gamestate.motospeed-=1;
+ }
+ Thrust
(ob->angle,gamestate.motospeed);
+ }
if
(gamestate.victoryflag)
// watching the BJ
actor
return;
- in TryMove: (kills an
enemy when he's hit with
big speed)
for
(y=yl;y<=yh;y++)
for
(x=xl;x<=xh;x++)
{
check =
actorat[x][y];
if (check >
objlist
&&
(check->flags &
FL_SHOOTABLE) )
{
deltax = ob->x -
check->x;
if (deltax <
-MINACTORDIST || deltax
> MINACTORDIST)
continue;
deltay = ob->y -
check->y;
if (deltay <
-MINACTORDIST || deltay
> MINACTORDIST)
continue;
+ if
(gamestate.mbike==true
&&
(gamestate.motospeed>=2000
||
gamestate.motospeed<=-2000))
//adjust the speed to
your liking
+ {
+
KillActor(actorat[x][y]);
+ return true;
+ }
return false;
}
}
return true;
- in DrawWeapon (status
bar weapon pic)
void DrawWeapon
(void)
{
if
(gamestate.mbike!=true)
StatusDrawPic
(32,8,KNIFEPIC+gamestate.weapon);
else
StatusDrawPic
(32,8,MBIKEPIC); // use
your own picture
}
- in ClipMove (what to
do after mbike hits an
object/wall with a
certain speed):
if (noclip &&
ob->x >
2*TILEGLOBAL &&
ob->y >
2*TILEGLOBAL
&&
ob->x <
(((long)(mapwidth-1))<<TILESHIFT)
&& ob->y <
(((long)(mapheight-1))<<TILESHIFT)
)
return; // walk through
walls
+ if
(gamestate.mbike==true)
+ {
+ if
(gamestate.motospeed<=200)
// very slow or
backwards movement -
just set the speed to
0
+
gamestate.motospeed=0;
+ else // if we're
riding faster... (you
should add crash sound
here, probably something
like the sound stuff
just below this "+"
section. I didn't add it
cause I have some
problems with sound in
Wolf and can't test
it)
+ {
+ if
(gamestate.motospeed>=5000)
// take damage if you're
driving really fast,
damage depends on the
speed
+{
+ TakeDamage
(gamestate.motospeed/500,
NULL);
+ SD_PlaySound (EVASND);
// use some CRASHSND of
your creation
instead
+}
+
gamestate.motospeed=-0.3*gamestate.motospeed;
// bounce
+ } // so that you won't
get into a wall
+ ob->x=basex;
+ ob->y=basey;
+ return;
+ }
if
(!SD_SoundPlaying())
SD_PlaySound
(HITWALLSND);
* WL_DRAW.C
- in DrawPlayerWeapon
(draws sprite
appropriate to the side
you're turning as the
weapon in player's
hands)
#ifndef SPEAR
if
(gamestate.victoryflag)
{
if (player->state ==
&s_deathcam
&&
(TimeCount&32) )
SimpleScaleShape(viewwidth/2,SPR_DEATHCAM,viewheight+1);
return;
}
#endif
+ if (gamestate.mbike ==
true)
+ {
+ if (gamestate.left ==
true)
+ {
+
SimpleScaleShape(viewwidth/2,SPR_CHAINATK1,viewheight+1);
// change SPR_* here and
below to your own
ones
+ return;
+ }
+ else if
(gamestate.right ==
true)
+ {
+
SimpleScaleShape(viewwidth/2,SPR_KNIFEATK2,viewheight+1);
+ return;
+ }
+
SimpleScaleShape(viewwidth/2,SPR_PISTOLATK3,viewheight+1);
+ return;
+ }
if (gamestate.weapon !=
-1)
{
shapenum =
weaponscale[gamestate.weapon]+gamestate.weaponframe;
SimpleScaleShape(viewwidth/2,shapenum,viewheight+1);
}
Voila! You should get a
nice motorbike. Any
questions? Mail
Kuki.
Thanks to him for such a
nice tutorial!
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