Custom class return value bug - Programming and Scripting Forum

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	Custom class return value bug

xanimalkingx Registered User
Quote
2018-12-02 01:40:04

I made a small vector2d class. When I print just the vector2d itself, I get a 3 point value despite the class only having a X and Y value.
My class has no Z value or field, so its impossible to return a third value. Its default constructor insures that.
For example:


var newVec = new vector2d(0.5, 0.5);
print(newVec);

Outputs:


0.5, 0.5, 0.0

Where as:


var newVec = new vector2d(0.5, 0.5);
print(newVec.x + ", " + newVec.y);

Outputs:


0.5, 0.5

Here is my class:


// vector2d class by xanimalkingx
// Holds 2 points which can be used for things that require 2D coordinates,
// such as texture coordinates.
// (must be defined at start of file)
vector2d = function(xVal, yVal) {
	// Constructor
	// Check for null
	if (xVal == null) {
		this.x = 0;
	} else {
		this.x = xVal;
	}
	if (yVal == null) {
		this.y = 0;
	} else {
		this.y = yVal;
	}
	
	// Set both points to new values
	this.set = function(newX, newY) {
		this.x = newX;
		this.y = newY;
	}
	
	// Set a new value for the x point
	this.setX = function(newX) {
		this.x = newX;
	}
	
	// Set a new value for the y point
	this.setY = function(newY) {
		this.y = newY;
	}
	
	// Clone this vector2d into a new variable
	this.clone = function() {
		return new vector2d(this.x, this.y);
	}
}

just_in_case Moderator
Quote
2018-12-02 07:05:39

Coppercube will always provide 3 cordinates even if you use vecotor2d... It will still provide you 3 cordinates... You may use ccbget2dposfrom3dpos...
If that helps...

xanimalkingx Registered User
Quote
2018-12-02 16:24:25

You clearly don't know what I mean. My class is literally a custom made 2d vector class with ONLY 2 points so the default value SHOULD NOT return a 3 point value itself. This is a BUG.

erik Registered User
Quote
2018-12-02 16:52:03

So, where is the definition of your class?

just_in_case Moderator
Quote
2018-12-02 20:17:26

We can't see your custom defined class.... So can't say if it is a bug within coppercube or if there is some issue with your custom class?

xanimalkingx Registered User
Quote
2018-12-03 01:24:24

I updated the post with my class.

niko Moderator
Quote
2018-12-03 07:16:56

For having the correct output, you need to add something like this into your class:


	this.toString = function() {
		return this.x + ", "+ this.y;
	}

then it should work.

xanimalkingx Registered User
Quote
2018-12-03 07:23:36

wrote:
For having the correct output, you need to add something like this into your class:


	this.toString = function() {
		return this.x + ", "+ this.y;
	}

then it should work.

That actually works... I didn't actually think to add a standard toString method to my class. Thank you niko!

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