offscreen buffer, viewport following character

Programming Questions

ctwizard

offscreen buffer, viewport following character

in Programming Questions • 1 year ago

Ok, so I'm trying to make a simple game with a moving character walking around a background.

PROBLEM= The background I want to be bigger than the visible screen.
I think i have to use the PGraphics command to create images that aren't immediately visible.

I also, want the background to follow the character (a PImage that moves via W,A,S,D).

Can't do it for the life of me please help!!!
(maybe direct me to resources or commands that could do it)

Replies(2)

amnon.owed

Re: offscreen buffer, viewport following character

1 year ago

There isn't a whole lot more to PGraphics than is covered in the reference here. Create it, use beginDraw() and endDraw() and make sure to add the name of the PGraphics in front of everything that concerns the drawing. So all calls to fill, stroke, line, colorMode etc.

With regard to images bigger than the viewport that follow the character, see the basic example below.

Code Example

PImage bg = loadImage("http://www.gamer-printshop.com/kaidan/daitengu-pass-full-size.jpg");
int dx, dy;
int moveSpeed = 3;
void setup() {
size(500, 500);
imageMode(CENTER);
fill(255, 0, 0);
smooth();
}
void draw() {
image(bg, dx, dy);
ellipse(width/2, height/2, 50, 50);
}
void keyPressed() {
if (key == 'w') { dy+=moveSpeed; }
if (key == 's') { dy-=moveSpeed; }
if (key == 'd') { dx-=moveSpeed; }
if (key == 'a') { dx+=moveSpeed; }
}

ctwizard

Re: offscreen buffer, viewport following character

1 year ago

Thank you so much.

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