How do I use JavaScript to determine if mouse is over an object and update an effect parameter?

Hello,

I read through the scripting reference documentation but am not finding what I need.

What I would like to do is this:

1. Determine if the mouse is over object A
2. If yes, enable effect "Brightness"
3. Also set effect "Brightness" parameter 0 to 80
4. Else, if the mouse is not over object A, disable effect "Brightness"

So far, I am able to do this using the visual programming language of Construct3.

I would like to be able to do this using JavaScript.

I suppose I could use getMousePosition to get [x,y] and then check if the values are within the range of the object's coordinates?

Then, how do I get the effect and set parameter 0 for "Brightness"? So far I have not found a way.

Anyone have any suggestions or can point me to some detailed guides please?

Personally, I found it the easiest to abstract the input events into an event sheet and then actually process them via the scripts (i.e. functions).

Sadly, I did not find Mikal implementation suitable for my needs - the containsPoint does not take into account the user resizing their window.

Interesting, it seems different from my experience, but maybe you mean something different, I can resize the preview window and it still has the correct behavior. Is that what you mean by 'user resizing the windows'? I wonder what is different.

Here's my example: gofile.io/d/qulRnW

The code is simple:

let spriteInst = null
let spriteList= runtime.objects.Sprite.getAllInstances()
let mouseInst = runtime.objects.Mouse
for (let i=0;i<spriteList.length;i++)
{
	spriteInst = spriteList[i]
	if (spriteInst.containsPoint(mouseInst.getMouseX(),mouseInst.getMouseY()))
	{
		spriteInst.opacity = 0.5
	} else
	{
		spriteInst.opacity = 1.0
	}
}

Interesting, it seems different from my experience, but maybe you mean something different, I can resize the preview window and it still has the correct behavior. Is that what you mean by 'user resizing the windows'? I wonder what is different.

Here's my example: gofile.io/d/qulRnW

The code is simple:

> let spriteInst = null
let spriteList= runtime.objects.Sprite.getAllInstances()
let mouseInst = runtime.objects.Mouse
for (let i=0;i<spriteList.length;i++)
{
	spriteInst = spriteList[i]
	if (spriteInst.containsPoint(mouseInst.getMouseX(),mouseInst.getMouseY()))
	{
		spriteInst.opacity = 0.5
	} else
	{
		spriteInst.opacity = 1.0
	}
}

That's definitely a working option, ain't thought of that. I was trying to determine the mouse position from the click event which seems to be your regular JS click.