Avatar Cannon

  1 
  2 //Person Cannon v0.9.4
  3 //Author: Olly Butters
  4 //13 February 2007
  5 //Part of the schome initiative. (www.schome.ac.uk)
  6 //You may copy/edit this, but please credit us.
  7 //This script moves an object via the avatars key strokes. It has a power variable which is controls the speed the avatar is shot.
  8 //Controls:
  9 //Left/Right - rotate cannon left/right 
 10 //Forward/Back - rotate cannon up/down
 11 //Up/Down - increase/decrease the power the avatar is shot out.
 12 //Mouse-click - FIRE!!
 13 
 14 
 15 //These are variables that could concievibly be altered.
 16 float muzzle_velocity = 50;             //speed of the avatar
 17 float angle_increment = 10;             //amount the cannon rotates by
 18 
 19 
 20 //Nothing to edit below here at all, so don't even look!
 21 integer no_of_inclination_moves = 0;    //keeps track of how much the cannon inclination
 22 integer no_of_rotation_moves = 0;       //keeps track of the cannons rotation
 23 integer first_touch = 0;                //keeps track of wether avatar is in the cannon
 24 key id;                                 //avatar id.
 25 
 26 //function to explain how to use.
 27 instructions()
 28 {
 29     llSay(0, "Hello.\n This is the person cannon - the best way to get around!\n To move the cannon use forward/back/left/right.\n To change the power of the cannon use up/down.\n\n To fire yourself click on the cannon.");
 30 }
 31 
 32 //function to specify the precision of a float when converted to a string
 33 string fixedPrecision(float input, integer precision)
 34 {
 35     if((precision = (precision - 7 - (precision < 1))) & 0x80000000)
 36         return llGetSubString((string)input, 0, precision);
 37     return (string)input;
 38 }
 39 
 40 default 
 41 {
 42     state_entry() 
 43     {
 44         //sets up the initial position
 45         vector eul = <0, 0, 0>;
 46         eul *= DEG_TO_RAD; //convert to radians rotation
 47         rotation quat = llEuler2Rot( eul ); //convert to quaternion
 48         llSetRot(quat); //rotate the object 
 49         llSitTarget(<0,0,0.1>, ZERO_ROTATION); //this needs to be tweeked! shooting straight up is no longer straight up!
 50         llSetSitText("Climb in");//makes it say climb in istead of sit on in the pie menu.
 51     }
 52 
 53    
 54      
 55     //Move the cannon around and keeps track of the movement.
 56     control( key ida, integer held, integer change )  // event for processing key press
 57     {
 58         vector position = llGetPos();
 59         
 60         if( change & held & (CONTROL_LEFT | CONTROL_ROT_LEFT) ) 
 61         {                         
 62             rotation new_rot = llGetRot()*llAxisAngle2Rot(<0,0,1>, angle_increment*DEG_TO_RAD);
 63             llSetRot(new_rot); 
 64             no_of_rotation_moves = no_of_rotation_moves+1;
 65         } 
 66         else if( change & held & (CONTROL_RIGHT |CONTROL_ROT_RIGHT) ) 
 67         {  
 68             rotation new_rot = llGetRot()*llAxisAngle2Rot(<0,0,1>, -angle_increment*DEG_TO_RAD);
 69             llSetRot(new_rot); 
 70             no_of_rotation_moves = no_of_rotation_moves - 1;
 71         }
 72          else if( change & held & CONTROL_FWD ) 
 73         {  
 74             rotation z_inc = llEuler2Rot( <0, angle_increment * DEG_TO_RAD, 0> );
 75             rotation new_rot =  z_inc*llGetRot();           
 76             
 77             llSetRot(new_rot);          
 78             
 79             no_of_inclination_moves = no_of_inclination_moves - 1;
 80         }
 81          else if( change & held & CONTROL_BACK ) 
 82         {  
 83             rotation z_inc = llEuler2Rot( <0, -angle_increment * DEG_TO_RAD, 0> );
 84             rotation new_rot = z_inc*llGetRot();
 85             
 86             llSetRot(new_rot);          
 87             
 88             no_of_inclination_moves = no_of_inclination_moves + 1;
 89         }
 90          else if( change & held & CONTROL_UP ) 
 91         {
 92               muzzle_velocity = muzzle_velocity + 50;
 93               string mv = "muzzle velocity=" + fixedPrecision(muzzle_velocity,0) + "m/s";
 94               llSay(0, mv);
 95         }
 96         else if( change & held & CONTROL_DOWN ) 
 97         {
 98             muzzle_velocity = muzzle_velocity - 50;
 99             if(muzzle_velocity<0)
100             {
101                 muzzle_velocity=0;
102             }
103             string mv = "muzzle velocity=" + fixedPrecision(muzzle_velocity,0) + "m/s";
104             llSay(0, mv);
105         }       
106     }
107 
108     //Invoked when the avatar 'sits' on the cannon.
109     //Explains how to use,
110     //Sets a time limit,
111     //Gets permission for stuff,
112     //Moves the camera
113     //changes 'first_touch' to 1 indicating that avatar is in the cannon.    
114     changed(integer change) 
115     {
116         if(change & CHANGED_LINK)
117         {
118             instructions();
119             llSetTimerEvent(60); //makes it reset itself after 1 minute
120  //           integer number;
121             id = llAvatarOnSitTarget();
122     
123             integer desired_controls =
124                 CONTROL_FWD |
125                 CONTROL_BACK |
126                 CONTROL_LEFT |
127                 CONTROL_RIGHT |
128                 CONTROL_ROT_LEFT |
129                 CONTROL_ROT_RIGHT |
130                 CONTROL_UP |
131                 CONTROL_DOWN;
132 
133 
134              llRequestPermissions(id, PERMISSION_TAKE_CONTROLS );
135              llTakeControls(desired_controls, TRUE, FALSE);
136              llRequestPermissions(id,PERMISSION_CONTROL_CAMERA);
137 
138              llSetCameraParams([
139                 CAMERA_ACTIVE, 1, // 1 is active, 0 is inactive
140                 CAMERA_BEHINDNESS_ANGLE, 0.0, // (0 to 180) degrees
141                 CAMERA_BEHINDNESS_LAG, 0.0, // (0 to 3) seconds
142                 CAMERA_DISTANCE, 8.0, // ( 0.5 to 10) meters
143                 //CAMERA_FOCUS, <0,0,5>, // region relative position
144                 CAMERA_FOCUS_LAG, 0.05 , // (0 to 3) seconds
145                 CAMERA_FOCUS_LOCKED, FALSE, // (TRUE or FALSE)
146                 CAMERA_FOCUS_THRESHOLD, 0.0, // (0 to 4) meters
147                 PITCH" title="View Definition"  class="tooltip">CAMERA_PITCH, 00.0, // (-45 to 80) degrees
148                 //CAMERA_POSITION, <0,0,0>, // region relative position
149                 CAMERA_POSITION_LAG, 0.1, // (0 to 3) seconds
150                 CAMERA_POSITION_LOCKED, FALSE, // (TRUE or FALSE)
151                 CAMERA_POSITION_THRESHOLD, 0.0, // (0 to 4) meters
152                 CAMERA_FOCUS_OFFSET, <3,0,2> // <-10,-10,-10> to <10,10,10> meters
153                 ]);
154            
155             first_touch=1; //indicates that am inside
156         }
157     }
158     
159     //If touching from the outside it explains that you have to get inside to use it. If touching from the inside it shoots.
160     touch(integer dave)
161     {
162         if(first_touch==0)
163         {
164             llSay(0, "Hello.\n This is the person cannon - the best way to get around!\n To use me simply right click, climb inside and follow the instructions.");
165         }
166         else
167         {
168             
169             llUnSit(id);
170             llPushObject(id,  <muzzle_velocity*llCos(no_of_rotation_moves*angle_increment*DEG_TO_RAD)*llCos((no_of_inclination_moves*angle_increment)*DEG_TO_RAD),
171                                muzzle_velocity*llSin(no_of_rotation_moves*angle_increment*DEG_TO_RAD)*llCos((no_of_inclination_moves*angle_increment)*DEG_TO_RAD),
172                                muzzle_velocity*llSin((no_of_inclination_moves*angle_increment)*DEG_TO_RAD)>, <1,1,1>, FALSE);
173             llSleep(2);
174             llResetScript();
175         }                                               
176     }
177     
178     
179     //resets the script
180     timer()
181     {
182         llSay(0, "You've had your fun, script resetting.");
183         llResetScript();
184     }   
185         
186 }
187 // END //