Implicit function Color Vector4

Unity Engine
1

I’m having some difficulty figuring out the syntax for converting a Vector4 to a Color.

In the documentation it states you can go to and from Vector4 to Color and back, but I can’t seem to figure it out.

Thanks,
~t

2

Implicit means that it converts to a color without any extra effort:

var b : Color = Vector4(0,1,0,1);

This sets b to full green.

3

Thanks!

4

Hmm, still a bit of a problem here…In the following code the ‘oneDfield[ ]’ Contains a list of Vector4’s

var c : Color = oneDfield[i]*255 ;
colorAr[i] = c;

I still get this error…

InvalidCastException: Cannot cast from source type to destination type.
eularianFluids_02_01.Con1DfieldToBitmap (System.Object width, System.Object length, System.Object oneDfield, System.Object typ, System.Object mVal)   (at Assets\Scripts\eularianFluids_02_01.js:79)
eularianFluids_02_01.INIT ()   (at Assets\Scripts\eularianFluids_02_01.js:165)
eularianFluids_02_01.Start ()   (at Assets\Scripts\eularianFluids_02_01.js:173)

I’m using this temporarily but it seems like it is allot of extra work.

				colorAr[i] = Color(oneDfield[i].x* 255, oneDfield[i].y* 255, oneDfield[i].z* 255, oneDfield[i].w* 255);
5

Perhaps the JS magic type conversion goes wrong here. I’m not sure, as I’m not a JS expert. Does removing the *255 fix it? It’s unlikely you want to use that multiplication anyway: Unity colors are defined with floats in the 0-1 range.

6

Yea it is strange…

This works:

				var c : Color = Vector4 (1,1,1,1); 
				colorAr[i] = c;

and so does:

colorAr[i] = Color(oneDfield[i].x, oneDfield[i].y, oneDfield[i].z, oneDfield[i].w);

BUT NOT:

var c : Color = oneDfield[i];
colorAr[i] = c;

OR:

colorAr[i] = oneDfield[i];

The last one results in this:

InvalidCastException: Cannot cast from source type to destination type.
System.Array.System.Collections.IList.set_Item (Int32 index, System.Object value) 
Boo.Lang.Runtime.RuntimeServices.SetArraySlice (System.Object target, System.Object[] args) [0x00000]
Boo.Lang.Runtime.RuntimeServices.Dispatch (System.Object target, System.String cacheKeyName, System.Type[] cacheKeyTypes, System.Object[] args, Boo.Lang.Runtime.DispatcherFactory factory) [0x00000]
Boo.Lang.Runtime.RuntimeServices.Dispatch (System.Object target, System.String cacheKeyName, System.Object[] args, Boo.Lang.Runtime.DispatcherFactory factory) [0x00000]
Boo.Lang.Runtime.RuntimeServices.SetSlice (System.Object target, System.String name, System.Object[] args) [0x00000]
eularianFluids_02_01.Con1DfieldToBitmap (System.Object width, System.Object length, System.Object oneDfield, System.Object typ, System.Object mVal)   (at Assets\Scripts\eularianFluids_02_01.js:81)
eularianFluids_02_01.INIT ()   (at Assets\Scripts\eularianFluids_02_01.js:167)
eularianFluids_02_01.Start ()   (at Assets\Scripts\eularianFluids_02_01.js:175)

It appears that a Vector4 in an array is not being cast properly, or the way I’m passing it to the function prevents implicit conversion.

7

How are your arrays defined? It seems that at least one of them is not typed (perhaps you’re using Array?).

8

Damn, figured it out thats for that last comment.

I was creating my Vector4 Arrays with ‘new Array’ then trying to implicitly convert a Vector4 within an Array to a Color in a Builtin Array.

I’ll post again if I can provide a simple example. For anyone else interested.

Cheers,
Tharyn