Mouse Detection and Speed detection Handlers

Quote:

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Originally Posted by 5TonsOfFlax

Put traces in, and find out what it's doing or not doing. I'm not (quite) infallible, and might have missed something.

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The trace output's trace nothing, there as you say seems to be something missing, I would be taking a wild guess in saying that it's something to do with the last statement of 'if hasgoneleft and hasgoneright' .. this part is out of my understanding :confused:

Post your full code. Where did you put the traces? Did you add the listeners?

Yes I have.

Code below with trace in the functions:

Actionscript Code:

addEventListener(Event.ENTER_FRAME, calculateMouseDirection);

function calculateMouseDirection(e:Event) {
    if (xDiff < 0) {
        hasGoneLeft = true;
        trace("has gone left is true");
    }
    
    if (hasGoneLeft && xDiff > 0) {
        hasGoneRight = true;
        trace("has gone right is true");
    }
}
    if (hasGoneLeft && hasGoneRight && (speed > lastSpeed)) {
        score++;
        trace("add +1 to current score");
    }

Thanks,

1. You are not calculating xDiff in that function. What happened to all the speed and lastx and lasty stuff?

B. Your final if is outside the event handler. it will execute once when that frame is reached and not again. At the time it executes, the booleans will still be false.

This is my full code:

Actionscript Code:

var lastX:Number = NaN;
var lastY:Number = NaN;
var speed:Number;

addEventListener(Event.ENTER_FRAME, calculateMouseSpeed);

function calculateMouseSpeed(e:Event) {
    if (isNaN(lastX) || isNaN(lastY)) {
        lastX = stage.mouseX;
        lastY = stage.mouseY;
        return;
    }
    
    var xDiff:Number = stage.mouseX - lastX;
    var yDiff:Number = stage.mouseY - lastY;
    speed = Math.sqrt(xDiff*xDiff + yDiff*yDiff);
        
    lastX = stage.mouseX;
    lastY = stage.mouseY;
}

var lastSpeed:Number = 0;
var hasGoneLeft:Boolean = false;
var hasGoneRight:Boolean = false;
var xDiff:Number = stage.mouseX - lastX;

addEventListener(Event.ENTER_FRAME, calculateMouseDirection);

function calculateMouseDirection(e:Event) {
    if (xDiff < 0) {
        hasGoneLeft = true;
        trace("has gone left is true");
    }
    
    if (hasGoneLeft && xDiff > 0) {
        hasGoneRight = true;
        trace("has gone right is true");
    }
}
    if (hasGoneLeft && hasGoneRight && (speed > lastSpeed)) {
        score++;
        trace("add +1 to current score");
    }

There's no reason to have those in separate functions. You can consolidate them, and get rid of the extra xDiff you've got. You also need to set lastSpeed at some point.

Code:

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var lastX:Number = NaN;
var lastY:Number = NaN;
var speed:Number;
var lastSpeed:Number = 0;
var hasGoneLeft:Boolean = false;
var hasGoneRight:Boolean = false;

addEventListener(Event.ENTER_FRAME, calculateMouseSpeed);

function calculateMouseSpeed(e:Event) {
    if (isNaN(lastX) || isNaN(lastY)) {
        lastX = stage.mouseX;
        lastY = stage.mouseY;
        return;
    }
 
    var xDiff:Number = stage.mouseX - lastX;
    var yDiff:Number = stage.mouseY - lastY;
    speed = Math.sqrt(xDiff*xDiff + yDiff*yDiff);
     
    if (xDiff < 0) {
        hasGoneLeft = true;
        trace("has gone left is true");
    }
 
    if (hasGoneLeft && xDiff > 0) {
        hasGoneRight = true;
        trace("has gone right is true");
    }

    if (hasGoneLeft && hasGoneRight && (speed > lastSpeed)) {
        score++;
        trace("add +1 to current score");
    }

    lastX = stage.mouseX;
    lastY = stage.mouseY;
    lastSpeed = speed;
}

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Quote:

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Originally Posted by 5TonsOfFlax

You also need to set lastSpeed at some point.

Code:

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var lastSpeed:Number = 0;

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Is that not the last speed set?

Well, yes, that is setting lastSpeed. But if you never set it again, it will remain 0, and it wouldn't reflect the last speed, would it?

Ohhhh! Got you! Be right back :)

Thank you. This seems to work great. I needed those 2 extra lines and to get rid of one. Thank you for your suggestions and guidance. You have aided in the expansion of my knowledge in Actionscript 3.0 (Y)

My last question, apologies, how can I set A mouse speed to say if the mouse drops below this speed on left to right movement. Trace out?

Nevermind, done it, changed the 0 to 50, I'll give a few numbers a try to find the solution.. thanks.