UP, DOWN, LEFT, RIGHT movement

Programming Questions

etan32

UP, DOWN, LEFT, RIGHT movement

in Programming Questions • 5 months ago

Hey there, I am currently doing an assignment for a class, and I am having a few troubles trying to get my PImage to move with the arrow keys. The image is a spaceship, and I am creating something similar to frogger. If anyone could tell me a hand that'd be great!

PImage space;
PImage trader;
PImage trader2;
PImage ship;
int x;
int y;
int thesize;
boolean left, right, up, down;
boolean runOnce = true;
void setup() {
size (1249,768);
smooth();
space = loadImage("space.png");
trader = loadImage("trader.png");
trader2 = loadImage("trader2.png");
x = 220;
y = 220;
thesize = 120;
}
void draw() {
background(space);
imageMode(CENTER);
fill(256, 165, 0);
image(trader2,400, 400);
}

Replies(3)

pauline303

Re: UP, DOWN, LEFT, RIGHT movement

5 months ago

your code doesn't show your try to implement arrow keys…anyway here's a simple example of moving ellipse with left/right buttons. wouldn't be hard to adapt with your needs.

int posx;
void setup()
{
size(200, 100);
posx= width/2;
}

void draw()
{
background(0);
ellipse(posx, height/2, 20, 20);
}

void keyPressed()
{
if (keyCode== RIGHT)
posx++;
if (keyCode== LEFT)
posx--;
if (posx<0) posx=0;
if (posx>width) posx=width;
}

etan32

Re: UP, DOWN, LEFT, RIGHT movement

5 months ago

Thanks for the reply! I managed to get the up down left right movement working fine, but now I am having issues with speed. How can I speed it up so it's moving faster?

PImage space;
PImage trader;
PImage trader2;
PImage ship;
int posx;
int posy;
boolean left, right, up, down;
boolean runOnce = true;
void setup() {
size (1249,768);
smooth();
space = loadImage("space.png");
trader = loadImage("trader.png");
trader2 = loadImage("trader2.png");
}
void draw() {
background(space);
imageMode(CENTER);
fill(256, 165, 0);
image(trader2, posx + 0, posy + 0);
}
void keyPressed()
{
if (keyCode== RIGHT)
posx++;
if (keyCode== LEFT)
posx--;
if (posx<0) posx=0;
if (posx>width) posx=width;
if (keyCode== DOWN)
posy++;
if (keyCode== UP)
posy--;
if (posy<0) posy=0;
if (posy>height) posy=height;
}

Thank you :)

Chrisir

Re: UP, DOWN, LEFT, RIGHT movement

5 months ago

insetad of

posx--;

say

posx-=3;

posx-=speedX;

with a var

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