project0's People
project0's Issues
Event listener for keys work in a roundabout way.
When a key is pressed,
document.body.onkeyup =
document.body.onkeydown = function(e){
if (e.preventDefault) {
e.preventDefault();
}
else {
e.returnValue = false;
}
var kc = e.keyCode || e.which;
keys[kc] = e.type == 'keydown';
};
The above code from app.js executes but doesn't call detectCharacterMovement()
or moveCharacter()
. Why doesn't the event listener call your function for moving characters?
That function executes because you have it firing 30 times a minute. These functions exist in a tangle that involves very unusual syntax.
var detectCharacterMovement = function(){
// Detecting key press Player 1
if ( keys[keys.LEFT] ) {
moveCharacter(-1, 0);
}
if ( keys[keys.RIGHT] ) {
moveCharacter(1, 0);
}
if ( keys[keys.UP] ) {
moveCharacter(0, -1);
}
if ( keys[keys.DOWN] ) {
moveCharacter(0, 1);
}
...
Above, you use values stored in keys
to access other values in keys
.
How about something more like:
(pseudocode)
On keypress {
if (event.keycode === keys.DOWN){
moveCharacter(0, 1);
}
...
}
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