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module objects
import gg
import gx
import rand
pub struct Rocket {
pub mut:
color gx.Color
pos Vector
vel Vector
accel Vector
exploded bool
particles []Particle
dead bool
}
pub fn (rocket Rocket) draw(mut ctx gg.Context) {
ctx.draw_circle(rocket.pos.x, get_params().height - rocket.pos.y, get_params().rocket_radius,
rocket.color)
}
pub fn (mut rocket Rocket) explode() {
rocket.exploded = true
for _ in 0 .. get_params().offspring_count {
rocket.spawn_particle()
}
}
pub fn (mut rocket Rocket) tick(mut ctx gg.Context) {
if !rocket.exploded {
if rocket.vel.y <= 1 {
rocket.explode()
}
rocket.accel += get_params().gravity
rocket.vel += rocket.accel
rocket.pos += rocket.vel
rocket.draw(mut ctx)
rocket.accel = Vector{}
}
for mut particle in rocket.particles {
particle.tick(mut rocket, mut ctx)
}
}
pub fn new_rocket() Rocket {
return Rocket{
color: random_color()
pos: Vector{
x: rand.f32_in_range(50, get_params().width - 50)
}
vel: Vector{
x: rand.f32_in_range(-1.5, 1.5)
y: rand.f32_in_range(5, 7)
}
}
}
pub fn (mut rocket Rocket) spawn_particle() {
rocket.particles << Particle{
color: rocket.color
pos: rocket.pos
accel: random_vector_in_circle().mult(2)
}
}
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