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