LSL-script for a Second Life football

I have been looking into the Linden Script Language (LSL) to be able to do more cool stuff within Second Life.

Here's a small script for a football. The ball can be kicked by just walking against it. Touching it causes the ball to bounce up in the air a couple of feet. You can also talk to it by saying "kick" which causes the ball to move with a certain vector strength and direction. "High kick" makes the ball going forward up in the air.

default {
state_entry () {
llListen (0, "", "","");
// Make sure that Physical is turned on
llSetStatus (1, TRUE);
}

collision_start (integer total_number) {
// Get the vector that points from the kicker to the ball
vector diff = llGetPos() - llDetectedPos(0);

// Force the z coordinate up
diff.z = .1;

// Scale the vector to a fixed length
vector kick_vector = llVecNorm(diff)*5;

// Apply the kick vector to the ball
llApplyImpulse(kick_vector, FALSE);
}

listen (integer channel, string name, key id, string message) {
if (message == "kick") {
// Get the vector that points from the kicker to the ball
vector diff = llGetPos() - llDetectedPos(0);

// Force the z coordinate up
diff.z = .1;

// Scale the vector to a fixed length
vector kick_vector = llVecNorm(diff)*10;

// Apply the kick vector to the ball
llApplyImpulse(kick_vector, FALSE);
}
else if (message == "high kick") {
// Get the vector that points from the kicker to the ball
vector diff = llGetPos() - llDetectedPos(0);

// Set the z-coordinate high up
diff.z =500;

// Scale the vector to a fixed length
vector kick_vector = llVecNorm(diff)*25;

// Apply the kick vector to the ball
llApplyImpulse(kick_vector, FALSE);
}
}

touch_start (integer total_number) {
// Create a manual kick vector where only the z-coordinate has a value separate from zero
vector kick_vector = <0.0,0.0,0.0>;

// Apply the kick vector to the ball
llApplyImpulse(kick_vector, FALSE);
}
}

Copy/type the script into the script editor pane when creating/replacing a new script for an object. Remember you have to be in a place where scripting is allowed to modify it and see the changes in action. Second Sweden allows it and there are many more places.
























Here are a couple of reference pages to get you started:

- This article is good to get you started. I have taken some lines of code from here.
- LSL Portal
- Second Life Tutorials

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Second Life, LSL, Linden Script Language, Ball, Script