Using constrain() with KeyPressed

MrGman2142 · March 2015

So I saw this example on constrain() void draw() { background(204); float mx = constrain(mouseX, 30, 70); rect(mx-10, 40, 20, 20); }

And I was trying to use it in my program that has WASD movement, but the experiment was unsuccessful. I was wandering how I would use it to stop my Ball when it hits the edge of the screen. Thank you!

colouredmirrorball · March 2015

Your question is a bit unclear. What do you mean with "unsuccessful"? Do you have any code to show and what do you expect?

MrGman2142 · March 2015

I'm mainly wandering how I would replace mouseX with WASD movement, sorry or not being clear.

GoToLoop · March 2015

This online example shows constrain() used to keep some Player from exiting the canvas' boundaries: B-)
http://studio.processingtogether.com/sp/pad/export/ro.91tcpPtI9LrXp/latest

void move() {
  x = constrain(x + v*(int(isRight) - int(isLeft)), d>>1, width - (d>>1));
  y = constrain(y + v*(int(isDown)  - int(isUp)), d>>1, height  - (d>>1));
}

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Using constrain() with KeyPressed

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