Translation problem in processing.js program?

programmi..

Translation problem in processing.js program?

in Processing with Other Languages • 9 months ago

Hi everyone!

This is my first post on this forum, so I apologise if I'm doing anything wrong.

I've been creating a Copter game recently, but I have a problem. I have a function drawHelicopter() which looks like this:

void drawHelicopter() {
// translate bird according to position of mouse cursor
translate(-20, mouseY);
/* helicopter code */
}

A few lines down, I have another function, drawObstacle(x, y) :

void drawObstacle(x, y) {
// make sure the obstacle doesn't get translated as well
translate(0, 0);
/* obstacle code */
}

I want the helicopter to move depending on the y-coordinate of the mouse cursor, but the obstacles move with the mouse as well, which shouldn't happen since I've written translate(0, 0); at the start of the drawObstacle () function.

What do I need to do in order to stop the obstacles from moving with the mouse?

Thanks!

Replies(2)

PhiLho

Re: Translation problem in processing.js program?

9 months ago

translate() doesn't work like that: each call adds to the previous ones... They are only reset on the next call of draw().
Or use pushMatrix() / popMatrix() to reset the transformations.

programmi..

Re: Re: Translation problem in processing.js program?

9 months ago

Thanks. Your suggestion works a treat!

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