Custom Projectile (Bow)

[E_Man]

I'm trying to make a custom bow with new images for my world, I found a script online that uses the command I need: "shoot" but I could not find it in the commands list so I don't know how to completely use it properly. Also I can't figure out how to make the arrows do damage, this is what I have so far.

// NPC made by E-Man
if (created) {
setimg woodenbow.png;
}
if (playertouchsme) {
toweapons Wooden Bow;
}
if (weaponfired && playerdir=0) {
freezeplayer 0.6;
setani shoot,woodenbow1.png;
sleep 0.2;
shoot playerx-0.8,playery+0.5,2,pi/2,0,0,eman_woodenarrow,;
}
if(weaponfired && playerdir=1){
freezeplayer 0.6;
setani shoot,woodenbow1.png;
sleep 0.2;
shoot playerx-1,playery+2,2,pi,1,0,eman_woodenarrow,;
}
if(weaponfired && playerdir=2){
freezeplayer 0.6;
setani shoot,woodenbow1.png;
sleep 0.2;
shoot playerx+0.2,playery+3,2,1.5*pi,.5,0,eman_woodenarr ow,;
}
if(weaponfired && playerdir=3){
freezeplayer 0.6;
setani shoot,woodenbow1.png;
sleep 0.2;
shoot playerx+1.3,playery+2,2,pi*2,1,0,eman_woodenarrow, ;
}



Also for some reason when I shoot left the arrow is transparent, I think that may be because of the shoot command though.

[DustyPorViva]

Shoot inherits basic gani properties. In this case you can just set the graphics in the gani for each direction and they will be set automatically when fired. You can also simplify the script like so:

PHP Code:

if (weaponfired) {
  freezeplayer 0.6;
  setani shoot,woodenbow1.png;
  sleep 0.2;
  shoot playerx-0.8,playery+0.5,2,pi/2*playerdir,0,0,eman_woodenarrow,;
} 


[E_Man]

Shoot inherits basic gani properties. In this case you can just set the graphics in the gani for each direction and they will be set automatically when fired. You can also simplify the script like so:

PHP Code:
if (weaponfired) {
freezeplayer 0.6;
setani shoot,woodenbow1.png;
sleep 0.2;
shoot playerx-0.8,playery+0.5,2,pi/2*playerdir,0,0,eman_woodenarrow,;
}

Making the script shorter is cool, but that is not the problem I have, I need to know what the variables in the command "shoot" are, and I need to figure out why is it when I shoot only left, it is transparent, and I need to figure out how to injure npc baddies. Also that script that you said shoots weird, if you shoot left, the arrow up, if you shoot up, the arrow goes right, it goes one direction more clockwise than it should.

(Btw, how do you put a script in a PHP Code box?)

[DustyPorViva]

PHP Code:

  - new script command 'shoot' for shooting projectiles:
    shoot x,y,z,angle,zangle,power,gani,ganiparams;
      x,y and z - specify the starting position
      angle - shoot angle (when looking from the top): east is 0,
        north 3.14/2, west is 3.14, south 3.14*3/2)
      zangle - the angle in vertical direction, 0 means the
        projectile is shoot horizontal, 3.14/2 means straight to the
        sun
      power - the shoot power which is used to shoot the projectile;
        if it's 0 then the projectile is shoot like an old arrow
        (doesn't fall down, moves 20 tiles each second)
      gani - the animation that is used for the projectile; the
        animation can be multidirectional, the engine automatically
        selects the best direction for the flying direction; the
        animation can have 1 step (not animated) or 7 steps, then the
        engine is automatically choosing the good animation step for
        the projectile flying angle - when its raising then step 1 is
        taken, when flying horizontal it is step 4, when it is short before
        the impact then the engine displays step 7
    When the projectile is landing or hitting an object then some actions
    are triggered. With the command 'setshootparams <params>;' you can set
    the parameters that the called scripts get, call 'setshootparams' before
    shooting the projectile.
    Client-side events:
      - actionprojectile:
        is triggered when a projectile lands on the player/npc,
        in #p(0), #p(1) etc. you have the parameters set with the
        command setshootparams
    Server-side events:
      - actionprojectile:
        is triggered when a client has used the 'shoot' command to shoot a
        projectile and the projectile is landed; in #p(0) and #p(1) you have
        the x and y position of the impact in case you want to place an explosion
        or similar things on the ground (the control-npc is automatically warped
        to the level where the impact happened); #p(2),#p(3) etc. contain the
        params set with 'setshootparams' (before shooting the projectile)
      - actionsprojectile:
        is triggered when a server-side script has shot a projectile and the projectile
        is landed; in #p(0) and #p(1) you have the x and y position of the impact
        (the control-npc is automatically warped to the level where the impact
        happened); #p(2),#p(3) etc. contain the params set with 'setshootparams'
        (before shooting the projectile)
    Projectiles are easy to use and don't take a lot of bandwidth because only
    the shooting of the projectile needs to be sent, the movement is calculated on
    the different computers. The projectile is flying like a heavy object thrown
    through the air: the horizontal movement speed keeps the same (moves
    horzspeed=cos(zangle)*speed tiles all 0.05 seconds), the vertical speed is
    initialized as vertspeed=sin(zangle)*speed and is decreased by 0.1 all 0.05 seconds;
    then the new position (calculated all 0.05 seconds) is
    newx = x + cos(angle)*horzspeed, newy = y - sin(angle)*horzspeed,
    newz = z + vertspeed 


[E_Man]

Can you give me an example line that uses "shoot because that is kind of confusing. I mainly don't get the variables of : z, angle, zangle, and ganiparams. Also I still don't know how to use setshootparams or how to call it, and setshootparams is to do damage, right?

[cbk1994]

Originally Posted by E_Man

Can you give me an example line that uses "shoot because that is kind of confusing. I mainly don't get the variables of : z, angle, zangle, and ganiparams. Also I still don't know how to use setshootparams or how to call it, and setshootparams is to do damage, right?

GS2 example of the shoot command:

Originally Posted by cbk1994

PHP Code:

temp.x = player.x + (vecx(player.dir) * 1.5);
temp.y = player.y + (vecy(player.dir) * 2);
temp.z = 0;

temp.angle = (player.dir + 1) * (pi / 2);
temp.zangle = 0;
temp.power = 0;

temp.ani = "sword";
temp.aniParam = "";
shoot(x, y, z, angle, zangle, power, ani, aniParam); 


Remove the parentheses and a couple other GS2 bits and you're good to go.

[E_Man]

Originally Posted by cbk1994

GS2 example of the shoot command:

I can't use gs2 scripts since I'm trial, but I may be able to figure out how to use the general variables in this command with gs1 with your script. But what is pi, it's in both gs1 and gs2 scripts, is that 3.14 or does it mean something else?

[cbk1994]

Originally Posted by E_Man

But what is pi, it's in both gs1 and gs2 scripts, is that 3.14 or does it mean something else?

Programming languages typically work in radians instead of degrees. There's 2pi radians in a circle.



Notice how the radians on the circle (they have pi attached) compare to the degrees.

So to get the angle bullets should fly at, we can do..

PHP Code:

(player.dir + 1) * (pi / 2) 


Let's say I'm facing left, which means my dir is 1.



So we can start filling in values for that expression

PHP Code:

(1 + 1) * (pi / 2) 


simplifies to..

PHP Code:

2 * (pi / 2) 


which simplifies using basic math to simply pi. If we look on that circle, we can see where the angle pi lies.



This is where our bullets will fly. Try the same thing for any direction and you'll find the angle matches up to the direction the player is facing.

[Tricxta]

Since graal functions work in radians, pi is an important variable seeing as pi *2 is equivalent to 360 degrees.

Apart from that it has no further significance.