60 lines
1.1 KiB
V
60 lines
1.1 KiB
V
module main
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import gx
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import gg
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import time
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import glfw
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// import math
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const (
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Size = 700
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Scale = 50.0
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)
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struct Context {
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gg &gg.GG
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}
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fn main() {
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glfw.init()
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ctx:= &Context{
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gg: gg.new_context(gg.Cfg {
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width: Size
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height: Size
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use_ortho: true
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create_window: true
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window_title: 'Graph builder'
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window_user_ptr: ctx
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always_on_top: true
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})
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}
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go update() // update the scene in the background in case the window isn't focused
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for {
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gg.clear(gx.White)
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ctx.draw()
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ctx.gg.render()
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}
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}
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[live]
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fn (ctx &Context) draw() {
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ctx.gg.draw_line(0, Size / 2, Size, Size / 2) // x axis
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ctx.gg.draw_line(Size / 2, 0, Size / 2, Size) // y axis
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center := f64(Size / 2)
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for x := -10.0; x <= 10.0; x += 0.002 {
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y := x * x - 1
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//y := (x + 3) * (x + 3) - 1
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//y := math.sqrt(30.0 - x * x)
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ctx.gg.draw_rect(center + x * Scale, center - y * Scale, 1, 1, gx.Black)
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//ctx.gg.draw_rect(center + x * Scale, center + y * Scale, 1, 1, gx.Black)
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}
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}
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fn update() {
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for {
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gg.post_empty_event()
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time.sleep_ms(300)
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}
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}
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