Okay – 8 and half hours of work done… (I forgot to post a devlog between when I stopped and restarted working, whoops)

I had fun with this one haha

What i added:

Slider to change the gravity (total, changes for all current objects)
Slider to change the ball weight/size/mass (local and exclusive)

Back on track.

This was fun because I’ve never done anything of the sort, so here’s a bit of what I wrote:

PX_PER_M = 100  # scale factor from real-world m/s^2 to our pixel-space gravityEARTH_GRAVITY = 9.8 * PX_PER_MPLANET_GRAVITY_MS2 = {    “mercury”: 3.7,    “venus”: 8.87,    “earth”: 9.8,    “moon”: 1.62,    “mars”: 3.71,    “jupiter”: 24.79,    “saturn”: 10.44,    “uranus”: 8.69,    “neptune”: 11.15,    “pluto”: 0.62,}RESTITUTION = 0.8  # energy kept on bounceMAX_BALLS = 8BASE_RADIUS = 15RADIUS_PER_MASS = 5

(i’ll add screenshots so the text is clearer)

class Ball:
def init(self, x, y, vx=0.0, vy=0.0, mass=1.0):
self.x = x
self.y = y
self.vx = vx
self.vy = vy
self.mass = mass
self.radius = BASE_RADIUS + RADIUS_PER_MASS * mass

def state(self):
    return {"x": self.x, "y": self.y, "radius": self.radius, "mass": self.mass}

class World:
def init(self, width, height, gravity=EARTH_GRAVITY):
self.width = width
self.height = height
self.gravity = gravity
self.balls = [Ball(x=width / 2, y=height / 4)]

def set_gravity(self, gravity):
    self.gravity = gravity

def launch(self, x, y, vx, vy, mass=1.0):
    if len(self.balls) >= MAX_BALLS:
        self.balls.pop(0)
    self.balls.append(Ball(x=x, y=y, vx=vx, vy=vy, mass=mass))

def step(self, dt):
    for ball in self.balls:
        ball.vy += self.gravity * dt
        ball.x += ball.vx * dt
        ball.y += ball.vy * dt

        floor = self.height - ball.radius
        ceiling = ball.radius
        if ball.y > floor:
            ball.y = floor
            ball.vy = -ball.vy * RESTITUTION
        elif ball.y < ceiling:
            ball.y = ceiling
            ball.vy = -ball.vy * RESTITUTION

        left = ball.radius
        right = self.width - ball.radius
        if ball.x < left:
            ball.x = left
            ball.vx = -ball.vx * RESTITUTION
        elif ball.x > right:
            ball.x = right
            ball.vx = -ball.vx * RESTITUTION

    self.resolve_collisions()

What I plan to do:

Add different shapes (not really important tho)
add backgrounds
add labels for the details of each ball whcih will bleed into making the gravitas exclusive as well.
Let me know if you have any ideas!