120 lines
2.1 KiB
V
120 lines
2.1 KiB
V
import os
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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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ui &objects.UIParams = 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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draw_flag bool = true
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}
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fn on_frame(mut app App) {
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if !app.draw_flag {
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return
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}
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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 = u8(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) or { 0 } == 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 on_event(e &gg.Event, mut app App) {
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match e.typ {
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.resized, .resumed {
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app.resize()
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}
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.iconified {
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app.draw_flag = false
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}
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.restored {
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app.draw_flag = true
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app.resize()
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}
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else {
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// println("Type ${e.typ}")
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}
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}
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}
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fn (mut app App) resize() {
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size := gg.window_size()
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// avoid calls when minimized
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if size.width < 2 && size.height < 2 {
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return
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}
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mut s := gg.dpi_scale()
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if s == 0.0 {
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s = 1.0
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}
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app.ui.dpi_scale = s
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app.ui.width = size.width
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app.ui.height = size.height
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}
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// is needed for easier diagnostics on windows
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[console]
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fn main() {
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mut font_path := os.resource_abs_path(os.join_path('..', 'assets', 'fonts', 'RobotoMono-Regular.ttf'))
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$if android {
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font_path = 'fonts/RobotoMono-Regular.ttf'
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}
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mut app := &App{}
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app.ui = objects.get_params()
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app.gg = gg.new_context(
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width: app.ui.width
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height: app.ui.height
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window_title: 'Fireworks!'
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bg_color: gx.black
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user_data: app
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frame_fn: on_frame
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event_fn: on_event
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font_path: font_path
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)
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app.gg.run()
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}
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