71 lines
1.2 KiB
V
71 lines
1.2 KiB
V
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import objects
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import gg
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import gx
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import rand
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struct App {
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mut:
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gg &gg.Context = 0
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rockets []objects.Rocket
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frames [][]objects.Rocket
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// i thought about using a fixed fifo queue for the frames but the array
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// seemed to work fine, if you'd like a challenge try implementing it with the queue :)
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}
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fn on_frame(mut app App) {
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app.gg.begin()
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// drawing previous frames
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for mut frame in app.frames {
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for mut rocket in frame {
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if !rocket.exploded {
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rocket.color.a = byte(f32_max(rocket.color.a - 8, 0))
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rocket.draw(mut app.gg)
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}
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}
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}
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// chance of firing new rocket
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if rand.intn(30) == 0 {
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app.rockets << objects.new_rocket()
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}
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// simulating rockets
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app.rockets = app.rockets.filter(!it.dead)
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for mut rocket in app.rockets {
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rocket.tick(mut app.gg)
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}
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// adding frame
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mut frame := app.rockets.clone()
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for mut rocket in frame {
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rocket.particles = []
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}
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app.frames << frame
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// trimming out frames
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if app.frames.len > 30 {
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app.frames.delete(0)
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}
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app.gg.end()
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}
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fn main() {
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mut app := &App{}
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app.gg = gg.new_context(
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width: objects.width
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height: objects.height
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window_title: 'Fireworks!'
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bg_color: gx.black
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use_ortho: true
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user_data: app
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frame_fn: on_frame
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)
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app.gg.run()
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}
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