CODE
// Gun script
// John Linden
// where the gun attaches itself if you click on it
// switch this to ATTACH_LHAND if you are left-handed
integer gAttachPart = ATTACH_RHAND;
key owner;
string INSTR_HELD_1 = "Enter Mouselook (press 'M') to shoot me.";
string INSTR_HELD_2 = "Right-click and choose 'Detach' to take me off.";
string INSTR_NOT_HELD_1 = "To wear and use me, right click and choose";
string INSTR_NOT_HELD_2 = "Acquire -> Attach -> Right Hand.";
string INSTR_NOT_OWNER_1 = "To use this gun, take it (right-click and choose 'Take'.)";
string INSTR_NOT_OWNER_2 = "Then, drag it from your inventory onto yourself.";
// this is a permission combination we check for many times
// I define it here so we don't have to keep typing it
// guns need to take controls, attach themselves, and possibly
// trigger animations
// NOTE: since I can't initialize to an expression (even if it is
// all constants), this moved to default { state_entry() }
integer gDesiredPerm;
// Indicates whether wearer has yet given permission
integer gHavePermissions;
// Bullet travel speed
float gBulletSpeed = 30.0;
// when we last fired a shot
float gLastFireTime = 0;
// how long it takes to reload when tapping
float gTapReloadTime = 0.05;
// how long it takes to reload when holding
float gHoldReloadTime = 1.0;
// how long it takes when we're out of ammo
float gOutOfAmmoReloadTime = 1.4;
// how many shots before reload is necessary
integer gAmmoClipSize = 6;
// how much ammo we have right now
integer gAmmo;
// HACK: how far away the eye is from the avatar's center (approximately)
vector gEyeOffset = <0.0, 0.0, 0.84>;
say(string msg)
{
llSay(0, msg);
}
debug(string msg)
{
// llSay(0, msg);
}
func_debug(string msg)
{
// llSay(0, msg);
}
// the gun has only one state
default
{
on_rez(integer start_param)
{
owner = llGetOwner();
func_debug("on_rez");
// HACK: try to compensate for height of avatar
// by changing firing position appropriately
vector size = llGetAgentSize(llGetOwner());
gEyeOffset.z = gEyeOffset.z * (size.z / 2.0);
llWhisper(0,"Press 'M' to enter mouslook and the mouse button to fire");
// NOTE: can't do this if we want to attach by dragging from
// inventory onto the av, because the llResetScript(); clears
// all the callbacks, including attach()
// llResetScript();
// NOTE 2: This can be uncommented in 1.1 because you won't have
// to ask for permissions, you can just take them. But for now
// it pops up two dialog boxes if you drag onto the av, so I'll
// leave it out.
// Try to attach to the rezzer
// if ( !gHavePermissions )
// {
// llRequestPermissions(llGetOwner(), gDesiredPerm);
// }
}
state_entry()
{
llListen(0,"",owner,"");
func_debug("default state_entry");
gHavePermissions = FALSE;
// this should be initialized directly with the variable
// but I can't do that due to a bug
gDesiredPerm = (PERMISSION_TAKE_CONTROLS
| PERMISSION_TRIGGER_ANIMATION);
// Start with a full clip
gAmmo = gAmmoClipSize;
llResetTime();
}
// the player has touched us (left-clicked)
// give directions
touch_start(integer tnum)
{
func_debug("touch_start");
// Guns only work for their owner
if ( llDetectedKey(0) == llGetOwner() )
{
if ( gHavePermissions )
{
llWhisper(0, INSTR_HELD_1);
llWhisper(0, INSTR_HELD_2);
} else
{
llWhisper(0, INSTR_NOT_HELD_1);
llWhisper(0, INSTR_NOT_HELD_2);
}
} else
{
// Not the owner
llWhisper(0, INSTR_NOT_OWNER_1);
llWhisper(0, INSTR_NOT_OWNER_2);
}
}
// Player attaches us, either by dragging onto self or from pie menu
attach(key av_key)
{
func_debug("attach");
if (av_key != NULL_KEY)
{
// Can't attach if we don't own it
if ( av_key != llGetOwner() )
{
llWhisper(0, INSTR_NOT_OWNER_1);
llWhisper(0, INSTR_NOT_OWNER_2);
return;
}
//
// Always request permissions on attach, as we may be re-rezzing on login
llRequestPermissions(av_key, gDesiredPerm);
// run_time_permissions() is executed after this call
} else
{
func_debug(" detach");
if ( gHavePermissions )
{
// we are being detached
llStopAnimation("hold_R_handgun");
llReleaseControls();
llSetRot(<0.0, 0.0, 0.0, 1.0>);
gHavePermissions = FALSE;
}
}
}
// this is called whenever llRequestPermissions() returns
// i.e. the user has responded or dismissed the dialog
// perm is the permissions we now have
run_time_permissions(integer perm)
{
func_debug("run_time_permissions");
// see if we now have the permissions we need
if ( (perm & gDesiredPerm) == gDesiredPerm )
{
func_debug(" got perms");
// we got the permissions we asked for
gHavePermissions = TRUE;
llTakeControls(CONTROL_ML_LBUTTON, TRUE, FALSE);
llStartAnimation("hold_R_handgun");
} else
{
func_debug(" didn't get perms");
// we didn't get them, kill ourselves
llDie();
}
}
// the player has used the controls, process them
control(key owner, integer level, integer edge)
{
func_debug("control");
// has our gun reloaded?
float time = llGetTime();
// see if av has fired
// (edge & level) == down edges, (edge & !level) == up edges
// repeat rate is faster for tapping than holding
if ( ( ((edge & level) & CONTROL_ML_LBUTTON)
&& (time > gTapReloadTime) )
|| ( (time > gHoldReloadTime)
&& (level & CONTROL_ML_LBUTTON) ) )
{
// if player is out of ammo, must wait for reload
if ( (gAmmo >= 1) || (time > gOutOfAmmoReloadTime) )
{
// bang!
llTriggerSound("pistol_shot.wav", 1.0);
llResetTime(); // we fired, set timer back to 0
// HACK: gun shoots from gun pos, mouselook looks
// from player's eye, so we try to move the gun
// up to the eye. but we really don't
// know where it is, so we guess (see gEyeOffset)
vector my_pos = llGetPos() + gEyeOffset;
rotation my_rot = llGetRot();
vector my_fwd = llRot2Fwd(my_rot);
// Rez a bullet!
llRezObject("Bullet",
my_pos,
my_fwd * gBulletSpeed,
my_rot,
1);
// decrease ammo count
--gAmmo;
if ( gAmmo > 0 )
{
// still bullets left
}
else if ( gAmmo == 0 )
{
// we just ran out of shots
// play reload sound here after a delay
llTriggerSound("pistol_reload.wav", 1.0);
}
else // gAmmo < 0
{
// we've just fired first round of new clip
gAmmo = gAmmoClipSize - 1;
}
} else
{
debug("Can't shoot, reloading...");
}
}
} // control
listen(integer channel,string name,key id,string message)
{
if(llGetSubString(message, 0, 5) == "#speed")
{
gBulletSpeed = (float)llGetSubString(message, 7, llStringLength(message));
llWhisper(0,"Speed sucessfully changed to " + (string)gBulletSpeed);
}
else if(message == "speed ?")
{
llWhisper(0,"Speed is currently " + (string)gBulletSpeed);
}
}
}
