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examples: fix compilation of the graph.v example

pull/6262/head
Delyan Angelov 2020-08-29 10:14:25 +03:00
parent 93294d4a97
commit 2b545f6b90
1 changed files with 35 additions and 38 deletions
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73
examples/hot_reload/graph.v
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@ -7,34 +7,38 @@ import math
const ( const (
size = 700 size = 700
scale = 50.0 scale = 50.0
pi = math.pi pi = math.pi
) )
struct Context { struct Context {
mut:
gg &gg.Context gg &gg.Context
} }
fn main() { fn main() {
gconfig := gg.Cfg { mut context := &Context{
width: size gg: 0
height: size
use_ortho: true
create_window: true
window_title: 'Graph builder'
always_on_top: true
}
ctx := &Context{ gg: gg.new_context(gconfig) }
ctx.gg.window.set_user_ptr( ctx )
go update() // update the scene in the background in case the window isn't focused
for {
if ctx.gg.window.should_close() {
break
}
gg.clear(gx.white)
ctx.draw()
ctx.gg.render()
} }
context.gg = gg.new_context({
width: size
height: size
font_size: 20
use_ortho: true
user_data: context
window_title: 'Graph builder'
create_window: true
frame_fn: frame
bg_color: gx.white
font_path: gg.system_font_path()
})
context.gg.run()
}
fn frame(mut ctx Context) {
ctx.gg.begin()
ctx.draw()
ctx.gg.end()
} }
[live] [live]
@ -42,28 +46,21 @@ fn (ctx &Context) draw() {
center := f32(size / 2) center := f32(size / 2)
ctx.gg.draw_line(0, center, size, center, gx.gray) // x axis ctx.gg.draw_line(0, center, size, center, gx.gray) // x axis
ctx.gg.draw_line(center, 0, center, size, gx.gray) // y axis ctx.gg.draw_line(center, 0, center, size, gx.gray) // y axis
atime := f64( time.ticks() / 10 ) atime := f64(time.ticks() / 10)
stime := math.sin( 2.0 * pi * f64( time.ticks() % 6000 ) / 6000 ) stime := math.sin(2.0 * pi * f64(time.ticks() % 6000) / 6000)
mut y := 0.0 mut y := 0.0
y = 1.0 y = 1.0
for x := -10.0; x <= 10.0; x += 0.02 { for x := -10.0; x <= 10.0; x += 0.02 {
//y = x*x + 2 // y = x*x + 2
y = x*x + stime*stime y = x * x + stime * stime
//y = stime // y = stime
//y = stime * x // y = stime * x
y = stime*1.0*math.sin(x + stime+atime/50) * x y = stime * 1.0 * math.sin(x + stime + atime / 50) * x
//y = (stime * x) * x + stime // y = (stime * x) * x + stime
//y = (x + 3) * (x + 3) / stime + stime*2.5 // y = (x + 3) * (x + 3) / stime + stime*2.5
//y = math.sqrt(30.0 - x * x) * stime // y = math.sqrt(30.0 - x * x) * stime
//y -= (stime-0.5) + stime // y -= (stime-0.5) + stime
ctx.gg.draw_rect(f32(center + x * scale), f32(center - y * scale), 1, 1, gx.blue) ctx.gg.draw_rect(f32(center + x * scale), f32(center - y * scale), 1, 1, gx.blue)
ctx.gg.draw_rect(f32(center + x * scale), f32(center + y * scale), 1, 1, gx.red) ctx.gg.draw_rect(f32(center + x * scale), f32(center + y * scale), 1, 1, gx.red)
} }
} }
fn update() {
for {
gg.post_empty_event()
time.sleep_ms(16) // 60 fps
}
}