72 lines
1.5 KiB
V
72 lines
1.5 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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pi = math.pi
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)
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struct Context {
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gg &gg.Context
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}
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fn main() {
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glfw.init_glfw()
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gconfig := 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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always_on_top: true
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}
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ctx := &Context{ gg: gg.new_context(gconfig) }
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ctx.gg.window.set_user_ptr( ctx )
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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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if ctx.gg.window.should_close() {
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break
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}
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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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center := f32(size / 2)
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ctx.gg.draw_line(0, center, size, center, gx.gray) // x axis
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ctx.gg.draw_line(center, 0, center, size, gx.gray) // y axis
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atime := f64( time.ticks() / 10 )
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stime := math.sin( 2.0 * pi * f64( time.ticks() % 6000 ) / 6000 )
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mut y := 0.0
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y = 1.0
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for x := -10.0; x <= 10.0; x += 0.02 {
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//y = x*x + 2
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y = x*x + stime*stime
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//y = stime
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//y = stime * x
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y = stime*1.0*math.sin(x + stime+atime/50) * x
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//y = (stime * x) * x + stime
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//y = (x + 3) * (x + 3) / stime + stime*2.5
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//y = math.sqrt(30.0 - x * x) * stime
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//y -= (stime-0.5) + stime
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ctx.gg.draw_rect(f32(center + x * scale), f32(center - y * scale), 1, 1, gx.blue)
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ctx.gg.draw_rect(f32(center + x * scale), f32(center + y * scale), 1, 1, gx.red)
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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(16) // 60 fps
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}
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}
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