How to make Hit Detection detect more than once
in
Programming Questions
•
5 months ago
Hi there,
I have a strange issue with my hit detection. It does detect, but only once on one of the ellipses (asteroids). I would like to make it detect all the collisions on each ellipse hit.
Thank you!
I have a strange issue with my hit detection. It does detect, but only once on one of the ellipses (asteroids). I would like to make it detect all the collisions on each ellipse hit.
Thank you!
- PFont font;
ArrayList asteroidsList = new ArrayList();
ArrayList laserList = new ArrayList();
Asteroids rocks;
FlyingObjects flying;
Laser myLaser;
Spaceship ship;
Asteroids aster;
//MAGIC NIMBERS
int WIDE = 80; //Asteroids radius
int SHIP_HEIGHT = 70;
int SHIP_WIDTH = 50;
int PADDING_TOP = 20;
int NUM = 2; // 8 asteroids
void setup() {
size(1024, 768);
flying = new FlyingObjects();
ship = new Spaceship(width/2, height/2, 0, 0);
for (int i = 0; i < NUM; i++) {
Asteroids newAs = new Asteroids();
asteroidsList.add(newAs);
}
}
void draw() {
background(0);
stroke(255);
fill(0);
for(int i = 0; i < asteroidsList.size(); i++) {
aster = (Asteroids) asteroidsList.get(i);
aster.render();
aster.update();
}
for (int i = 0; i < laserList.size(); i++) {
Laser myLaser = (Laser) laserList.get(i);
myLaser.render();
myLaser.update();
myLaser.collision(aster);
println(myLaser.hit);
}
//BOUNDARIES //////////////////////////////////////////////
if (ship.pos.x < -SHIP_WIDTH) {
ship.pos.x = width;
}
if (ship.pos.x > width + SHIP_WIDTH) {
ship.pos.x = 0;
}
if (ship.pos.y < -SHIP_HEIGHT) {
ship.pos.y = height;
}
if (ship.pos.y > height + SHIP_HEIGHT) {
ship.pos.y = 0;
}
//END BOUNDARIES //////////////////////////////////////////
flying.update();
ship.render();
ship.update();
}
void keyPressed() {
if (key == CODED) {
if (keyCode == UP) {
ship.vel.y = -5;
}
if (keyCode == DOWN) {
ship.vel.y = 5;
}
if (keyCode == LEFT) {
ship.vel.x = -5;
}
if (keyCode == RIGHT) {
ship.vel.x = 5;
}
}
if (key == ' ') {
Laser currentLaser = new Laser(ship.pos.x, ship.pos.y);
laserList.add(currentLaser);
}
}
void keyReleased() {
if (key == CODED) {
if (keyCode == UP) {
ship.vel.y = 0;
}
if (keyCode == DOWN) {
ship.vel.y = 0;
}
if (keyCode == LEFT) {
ship.vel.x = 0;
}
if (keyCode == RIGHT) {
ship.vel.x = 0;
}
}
} - class Asteroids {
int x;
int y;
int speed;
int counter;
float wide;
color col;
Asteroids() {
reset();
}
void reset() {
wide = 80;
x = int(random (0, width - wide/2));
y = 0; //begins at 0
speed = int(random(2, 8));
counter = 0;
col = color(0);
}
void render() {
pushMatrix();
translate(x, y);
fill(col);
ellipse(0, 0, wide, wide);
popMatrix();
}
void update() {
counter++;
y = speed * counter;
if (y-wide/2 > height) {
reset();
}
}
} - class Laser extends FlyingObjects {
float yVel, wide;
Boolean hit;
Laser(float x, float y) {
pos = new PVector(x, y);
yVel = 0;
wide = 10;
hit = false;
}
void render() {
fill(255,0,0);
ellipse(pos.x, pos.y, wide, wide);
pos.y += yVel;
}
void update() {
yVel = -3;
}
void collision(Asteroids a) {
if(dist(pos.x, pos.y, a.x, a.y) < wide/2 + a.wide/2) {
hit = true;
a.col = color(255,0,0);
} else {
hit = false;
}
}
} - class FlyingObjects {
PVector pos;
PVector vel;
FlyingObjects() {
}
void update(){
}
} - class Spaceship extends FlyingObjects {
Spaceship(float x, float y, float dx, float dy) {
pos = new PVector(x, y);
vel = new PVector(dx, dy);
}
void render() {
pushMatrix();
translate(pos.x, pos.y);
scale(0.6);
stroke(0, 255, 255);
fill(75);
beginShape();
//right side
vertex(0, 0);
vertex(50, 45);
vertex(40, 70);
vertex(20, 45);
vertex(10, 60);
vertex(0, 40);
//left side
vertex(0, 40);
vertex(-10, 60);
vertex(-20, 45);
vertex(-40, 70);
vertex(-50, 45);
vertex(0, 0);
endShape();
//glass window
fill(24, 59, 147);
beginShape();
vertex(0, 1);
vertex(15, 30);
vertex(0, 40);
vertex(0, 40);
vertex(-15, 30);
vertex(0, 1);
endShape();
popMatrix();
}
void update(){
pos.x += vel.x;
pos.y += vel.y;
}
}
1
