diff options
Diffstat (limited to 'v_windows/v/examples/fireworks/modules/objects/particle.v')
-rw-r--r-- | v_windows/v/examples/fireworks/modules/objects/particle.v | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/v_windows/v/examples/fireworks/modules/objects/particle.v b/v_windows/v/examples/fireworks/modules/objects/particle.v new file mode 100644 index 0000000..8f84a39 --- /dev/null +++ b/v_windows/v/examples/fireworks/modules/objects/particle.v @@ -0,0 +1,36 @@ +module objects + +import gg +import gx + +pub struct Particle { +pub mut: + color gx.Color + pos Vector + vel Vector + accel Vector + lifespan f32 = 255 +} + +pub fn (particle Particle) draw(mut ctx gg.Context) { + ctx.draw_circle(particle.pos.x, get_params().height - particle.pos.y, get_params().particle_radius, + particle.color) +} + +pub fn (mut particle Particle) tick(mut rocket Rocket, mut ctx gg.Context) { + particle.lifespan -= get_params().age_rate + particle.color.a = byte(particle.lifespan) + + if particle.lifespan <= 0 { + rocket.dead = true + return + } + + particle.accel += get_params().gravity + particle.vel += particle.accel + particle.vel = particle.vel.mult(get_params().drag) + particle.pos += particle.vel + particle.draw(mut ctx) + + particle.accel = Vector{} +} |