Javascript calling method in same class comes undefined?
So I'm relatively new to js and I'm trying to call a method 'lerp' inside my 'recordInputs' class. The recordInputs class is called somewhere else and works fine without the lerp function. The problem is that when the playerImage.x/y is equal to the lerp function a console error appears and says the 'lerp' method is undefined...
Here is the code:
class PlayerMoveClass
lerp(start, end, time)
return (1-time) * start + time * end;
RecordInputs(event)
currentXPos = playerImage.x;
currentYPos = playerImage.y;
xMousePosition = event.clientX;
yMousePosition = event.clientY;
playerImage.x = lerp(currentXPos, xMousePosition, 0.1);
playerImage.y = lerp(currentYPos, yMousePosition, 0.1);
console.log("X POS: " + playerImage.x + " Y POS: " + playerImage.y);
Thanks in advance to anyone who can help!
javascript class methods undefined
edited Nov 14 '18 at 16:52
ibrahim mahrir
22.2k41951
add a comment |
So I'm relatively new to js and I'm trying to call a method 'lerp' inside my 'recordInputs' class. The recordInputs class is called somewhere else and works fine without the lerp function. The problem is that when the playerImage.x/y is equal to the lerp function a console error appears and says the 'lerp' method is undefined...
Here is the code:
class PlayerMoveClass
lerp(start, end, time)
return (1-time) * start + time * end;
RecordInputs(event)
currentXPos = playerImage.x;
currentYPos = playerImage.y;
xMousePosition = event.clientX;
yMousePosition = event.clientY;
playerImage.x = lerp(currentXPos, xMousePosition, 0.1);
playerImage.y = lerp(currentYPos, yMousePosition, 0.1);
console.log("X POS: " + playerImage.x + " Y POS: " + playerImage.y);
Thanks in advance to anyone who can help!
javascript class methods undefined
edited Nov 14 '18 at 16:52
ibrahim mahrir
22.2k41951
I'm guessingRecordInputsis attached as an event listener somewhere, in which case your code won't work. Please provide that code.
– ibrahim mahrir
Nov 14 '18 at 16:53
5
You need to refer to it asthis.lerp
– Robin Zigmond
Nov 14 '18 at 16:54
maybe use this.lerp() when you call the method?
– Dexter0015
Nov 14 '18 at 16:54
Need to show howRecordInputsis used. The calling context will be important here
– charlietfl
Nov 14 '18 at 16:57
add a comment |
So I'm relatively new to js and I'm trying to call a method 'lerp' inside my 'recordInputs' class. The recordInputs class is called somewhere else and works fine without the lerp function. The problem is that when the playerImage.x/y is equal to the lerp function a console error appears and says the 'lerp' method is undefined...
Here is the code:
class PlayerMoveClass
lerp(start, end, time)
return (1-time) * start + time * end;
RecordInputs(event)
currentXPos = playerImage.x;
currentYPos = playerImage.y;
xMousePosition = event.clientX;
yMousePosition = event.clientY;
playerImage.x = lerp(currentXPos, xMousePosition, 0.1);
playerImage.y = lerp(currentYPos, yMousePosition, 0.1);
console.log("X POS: " + playerImage.x + " Y POS: " + playerImage.y);
Thanks in advance to anyone who can help!
javascript class methods undefined
edited Nov 14 '18 at 16:52
ibrahim mahrir
22.2k41951
So I'm relatively new to js and I'm trying to call a method 'lerp' inside my 'recordInputs' class. The recordInputs class is called somewhere else and works fine without the lerp function. The problem is that when the playerImage.x/y is equal to the lerp function a console error appears and says the 'lerp' method is undefined...
Here is the code:
class PlayerMoveClass
lerp(start, end, time)
return (1-time) * start + time * end;
RecordInputs(event)
currentXPos = playerImage.x;
currentYPos = playerImage.y;
xMousePosition = event.clientX;
yMousePosition = event.clientY;
playerImage.x = lerp(currentXPos, xMousePosition, 0.1);
playerImage.y = lerp(currentYPos, yMousePosition, 0.1);
console.log("X POS: " + playerImage.x + " Y POS: " + playerImage.y);
Thanks in advance to anyone who can help!
javascript class methods undefined
javascript class methods undefined
edited Nov 14 '18 at 16:52
ibrahim mahrir
22.2k41951
edited Nov 14 '18 at 16:52
ibrahim mahrir
22.2k41951
edited Nov 14 '18 at 16:52
ibrahim mahrir
22.2k41951
edited Nov 14 '18 at 16:52
ibrahim mahrir
22.2k41951
edited Nov 14 '18 at 16:52
ibrahim mahrir
22.2k41951
22.2k41951
asked Nov 14 '18 at 16:47
user7201716
I'm guessingRecordInputsis attached as an event listener somewhere, in which case your code won't work. Please provide that code.
– ibrahim mahrir
Nov 14 '18 at 16:53
5
You need to refer to it asthis.lerp
– Robin Zigmond
Nov 14 '18 at 16:54
maybe use this.lerp() when you call the method?
– Dexter0015
Nov 14 '18 at 16:54
Need to show howRecordInputsis used. The calling context will be important here
– charlietfl
Nov 14 '18 at 16:57
add a comment |
I'm guessingRecordInputsis attached as an event listener somewhere, in which case your code won't work. Please provide that code.
– ibrahim mahrir
Nov 14 '18 at 16:53
5
You need to refer to it asthis.lerp
– Robin Zigmond
Nov 14 '18 at 16:54
maybe use this.lerp() when you call the method?
– Dexter0015
Nov 14 '18 at 16:54
Need to show howRecordInputsis used. The calling context will be important here
– charlietfl
Nov 14 '18 at 16:57
I'm guessing
RecordInputs is attached as an event listener somewhere, in which case your code won't work. Please provide that code.– ibrahim mahrir
Nov 14 '18 at 16:53
I'm guessing
RecordInputs is attached as an event listener somewhere, in which case your code won't work. Please provide that code.– ibrahim mahrir
Nov 14 '18 at 16:53
5
5
You need to refer to it as
this.lerp– Robin Zigmond
Nov 14 '18 at 16:54
You need to refer to it as
this.lerp– Robin Zigmond
Nov 14 '18 at 16:54
maybe use this.lerp() when you call the method?
– Dexter0015
Nov 14 '18 at 16:54
maybe use this.lerp() when you call the method?
– Dexter0015
Nov 14 '18 at 16:54
Need to show how
RecordInputs is used. The calling context will be important here– charlietfl
Nov 14 '18 at 16:57
Need to show how
RecordInputs is used. The calling context will be important here– charlietfl
Nov 14 '18 at 16:57
add a comment |
1 Answer
1
active
oldest
votes
Referencing class members requires the use of the this keyword.
In your case:
playerImage.x = this.lerp(currentXPos, xMousePosition, 0.1);
playerImage.y = this.lerp(currentYPos, yMousePosition, 0.1);
If you are using RecordInputs as an event listener (as suggested in the comments), you may also need to add this constructor to your class to bind this correctly:
constructor()
this.RecordInputs = this.RecordInputs.bind(this);
answered Nov 14 '18 at 16:55
MTCosterMTCoster
3,83922141
1
Very possibly wrong context based on argumenteventlikely from a dom event listener
– charlietfl
Nov 14 '18 at 16:56
1
Yea you were right thanks! Yea was using it as an event listener as well, added that constructor and works like a charm!
– user7201716
Nov 14 '18 at 17:04
add a comment |
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1 Answer
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active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Referencing class members requires the use of the this keyword.
In your case:
playerImage.x = this.lerp(currentXPos, xMousePosition, 0.1);
playerImage.y = this.lerp(currentYPos, yMousePosition, 0.1);
If you are using RecordInputs as an event listener (as suggested in the comments), you may also need to add this constructor to your class to bind this correctly:
constructor()
this.RecordInputs = this.RecordInputs.bind(this);
answered Nov 14 '18 at 16:55
MTCosterMTCoster
3,83922141
1
Very possibly wrong context based on argumenteventlikely from a dom event listener
– charlietfl
Nov 14 '18 at 16:56
1
Yea you were right thanks! Yea was using it as an event listener as well, added that constructor and works like a charm!
– user7201716
Nov 14 '18 at 17:04
add a comment |
Referencing class members requires the use of the this keyword.
In your case:
playerImage.x = this.lerp(currentXPos, xMousePosition, 0.1);
playerImage.y = this.lerp(currentYPos, yMousePosition, 0.1);
If you are using RecordInputs as an event listener (as suggested in the comments), you may also need to add this constructor to your class to bind this correctly:
constructor()
this.RecordInputs = this.RecordInputs.bind(this);
answered Nov 14 '18 at 16:55
MTCosterMTCoster
3,83922141
1
Very possibly wrong context based on argumenteventlikely from a dom event listener
– charlietfl
Nov 14 '18 at 16:56
1
Yea you were right thanks! Yea was using it as an event listener as well, added that constructor and works like a charm!
– user7201716
Nov 14 '18 at 17:04
add a comment |
Referencing class members requires the use of the this keyword.
In your case:
playerImage.x = this.lerp(currentXPos, xMousePosition, 0.1);
playerImage.y = this.lerp(currentYPos, yMousePosition, 0.1);
If you are using RecordInputs as an event listener (as suggested in the comments), you may also need to add this constructor to your class to bind this correctly:
constructor()
this.RecordInputs = this.RecordInputs.bind(this);
answered Nov 14 '18 at 16:55
MTCosterMTCoster
3,83922141
Referencing class members requires the use of the this keyword.
In your case:
playerImage.x = this.lerp(currentXPos, xMousePosition, 0.1);
playerImage.y = this.lerp(currentYPos, yMousePosition, 0.1);
If you are using RecordInputs as an event listener (as suggested in the comments), you may also need to add this constructor to your class to bind this correctly:
constructor()
this.RecordInputs = this.RecordInputs.bind(this);
answered Nov 14 '18 at 16:55
MTCosterMTCoster
3,83922141
edited Nov 14 '18 at 16:59
answered Nov 14 '18 at 16:55
MTCosterMTCoster
3,83922141
answered Nov 14 '18 at 16:55
MTCosterMTCoster
3,83922141
answered Nov 14 '18 at 16:55
MTCosterMTCoster
3,83922141
3,83922141
1
Very possibly wrong context based on argumenteventlikely from a dom event listener
– charlietfl
Nov 14 '18 at 16:56
1
Yea you were right thanks! Yea was using it as an event listener as well, added that constructor and works like a charm!
– user7201716
Nov 14 '18 at 17:04
add a comment |
1
Very possibly wrong context based on argumenteventlikely from a dom event listener
– charlietfl
Nov 14 '18 at 16:56
1
Yea you were right thanks! Yea was using it as an event listener as well, added that constructor and works like a charm!
– user7201716
Nov 14 '18 at 17:04
1
1
Very possibly wrong context based on argument
event likely from a dom event listener– charlietfl
Nov 14 '18 at 16:56
Very possibly wrong context based on argument
event likely from a dom event listener– charlietfl
Nov 14 '18 at 16:56
1
1
Yea you were right thanks! Yea was using it as an event listener as well, added that constructor and works like a charm!
– user7201716
Nov 14 '18 at 17:04
Yea you were right thanks! Yea was using it as an event listener as well, added that constructor and works like a charm!
– user7201716
Nov 14 '18 at 17:04
add a comment |
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I'm guessing
RecordInputsis attached as an event listener somewhere, in which case your code won't work. Please provide that code.– ibrahim mahrir
Nov 14 '18 at 16:53
5
You need to refer to it as
this.lerp– Robin Zigmond
Nov 14 '18 at 16:54
maybe use this.lerp() when you call the method?
– Dexter0015
Nov 14 '18 at 16:54
Need to show how
RecordInputsis used. The calling context will be important here– charlietfl
Nov 14 '18 at 16:57