How to define a interactive point

WorldLover

I have a scenery that shows a house. I want to use this scenery in a game, but i want that when the player click somewhere (for example, in the sofa) the game says something like "It's just the sofa, nothing special.". There's a way to detect if the mouse is clicking a certain color, or define a place of the scenery as a interactive spot?

jstrout

You can do either of those things.

To check the color the mouse is clicked, just check gfx.pixel(mouse.x, mouse.y). (Of course we will first need to figure out why PixelDisplay isn't showing up for you on Windows 7!)
To define a "interactive spot" in the scenery, you could use the Bounds class. That lets you define a rectangle of any size and rotation, and then check whether the mouse is in it — for example, if sofaBounds.contains(mouse) then...

If you're trying to make a point-and-click adventure, I'd probably go with the Bounds class. Make a little helper that lets you define where these bounds are, and a debug mode that draws them so you can see. And give each one the name of a function to run when clicked. Then in normal mode, you don't draw them, but you detect the clicks and run the corresponding function.

All this will be a bit of a challenge for a beginner, but take it step by step — and ask lots of questions — and you can definitely do it!

WorldLover

Ok, i thinks i really should use the bounds. But how to set a bound an his position?

jstrout

The latest version of the Mini Micro cheatsheet has this to say about Bounds:

So you would set one up something like this:

b = new Bounds
b.x = 300
b.y = 200
b.width = 150
b.height = 100
b.rotation = 45

And then you could simply use if b.contains(mouse) to check whether the mouse is within that bounds.

WorldLover

Ok, it worked, thank you so much! I tried to define a interactive point by typing
if mouse.x > 360 and mouse.x < 380 then if mouse.y >260 and mouse.y < 280 then... but it didn't work. But the bounds worked perfectly, thanks!

jstrout

The mouse checks should have worked too, but that was a pretty tight (20 x 20) area you defined there. Maybe it was just too hard to hit. 🙂