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|
import os
import objects
import gg
import gx
import rand
struct App {
mut:
gg &gg.Context = 0
ui &objects.UIParams = 0
rockets []objects.Rocket
frames [][]objects.Rocket
// i thought about using a fixed fifo queue for the frames but the array
// seemed to work fine, if you'd like a challenge try implementing it with the queue :)
draw_flag bool = true
}
fn on_frame(mut app App) {
if !app.draw_flag {
return
}
app.gg.begin()
// drawing previous frames
for mut frame in app.frames {
for mut rocket in frame {
if !rocket.exploded {
rocket.color.a = byte(f32_max(rocket.color.a - 8, 0))
rocket.draw(mut app.gg)
}
}
}
// chance of firing new rocket
if rand.intn(30) == 0 {
app.rockets << objects.new_rocket()
}
// simulating rockets
app.rockets = app.rockets.filter(!it.dead)
for mut rocket in app.rockets {
rocket.tick(mut app.gg)
}
// adding frame
mut frame := app.rockets.clone()
for mut rocket in frame {
rocket.particles = []
}
app.frames << frame
// trimming out frames
if app.frames.len > 30 {
app.frames.delete(0)
}
app.gg.end()
}
fn on_event(e &gg.Event, mut app App) {
match e.typ {
.resized, .resumed {
app.resize()
}
.iconified {
app.draw_flag = false
}
.restored {
app.draw_flag = true
app.resize()
}
else {
// println("Type ${e.typ}")
}
}
}
fn (mut app App) resize() {
size := gg.window_size()
// avoid calls when minimized
if size.width < 2 && size.height < 2 {
return
}
mut s := gg.dpi_scale()
if s == 0.0 {
s = 1.0
}
app.ui.dpi_scale = s
app.ui.width = size.width
app.ui.height = size.height
}
// is needed for easier diagnostics on windows
[console]
fn main() {
mut font_path := os.resource_abs_path(os.join_path('../assets/fonts/', 'RobotoMono-Regular.ttf'))
$if android {
font_path = 'fonts/RobotoMono-Regular.ttf'
}
mut app := &App{}
app.ui = objects.get_params()
app.gg = gg.new_context(
width: app.ui.width
height: app.ui.height
window_title: 'Fireworks!'
bg_color: gx.black
user_data: app
frame_fn: on_frame
event_fn: on_event
font_path: font_path
)
app.gg.run()
}
|
