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examples: make the graph example resizable, use cooler lines (#6267)

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pancake 2020-08-30 18:11:59 +02:00 committed by GitHub
parent 5d3d14da53
commit a1dcc3bb9f
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2 changed files with 20 additions and 13 deletions
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29
examples/hot_reload/graph.v
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@ -2,13 +2,13 @@ module main
import gx
import gg
import sokol.sapp
import time
import math
const (
size = 700
scale = 50.0
pi = math.pi
)
struct Context {
@ -29,6 +29,7 @@ fn main() {
window_title: 'Graph builder'
create_window: true
frame_fn: frame
resizable: true
bg_color: gx.white
font_path: gg.system_font_path()
})
@ -43,24 +44,30 @@ fn frame(mut ctx Context) {
[live]
fn (ctx &Context) draw() {
center := f32(size / 2)
ctx.gg.draw_line(0, center, size, center, gx.gray) // x axis
ctx.gg.draw_line(center, 0, center, size, gx.gray) // y axis
w := sapp.width()
h := sapp.height()
ctx.gg.draw_line(0, h/2, w, h/2, gx.gray) // x axis
ctx.gg.draw_line(w/2, 0, w/2, h, gx.gray) // y axis
atime := f64(time.ticks() / 10)
stime := math.sin(2.0 * pi * f64(time.ticks() % 6000) / 6000)
stime := math.sin(2.0 * math.pi * f64(time.ticks() % 6000) / 6000)
mut y := 0.0
blue := gx.Color {r:100, g:100, b:200}
red := gx.Color {r:200, g:100, b:100}
y = 1.0
for x := -10.0; x <= 10.0; x += 0.02 {
max := f32(w)/scale
min := -max
for x := min; x <= max; x += 0.01 {
// y = x*x + 2
y = x * x + stime * stime
// y = x * x + stime * stime
// y = stime
// y = stime * x
y = stime * 1.0 * math.sin(x + stime + atime / 50) * x
// y = stime * h
y = stime * 1.0 * math.sin((x) + stime + atime / 32) * ((h/256) + x)
// y = (stime * x) * x + stime
// y = (x + 3) * (x + 3) / stime + stime*2.5
// y = math.sqrt(30.0 - x * x) * 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.red)
// ctx.gg.draw_rect(f32((w/2) + x * scale), f32((h/2) - y * scale), 2, 2, blue)
ctx.gg.draw_rect(f32((w/2) + x * scale), f32((h/2) - y * scale), 2, (f32(y) * scale), blue)
ctx.gg.draw_rect(f32((w/2) + x * scale), f32((h/2) + y * scale), 2, (f32(y) * scale) + 32, red)
}
}

4
thirdparty/sokol/util/sokol_gl.h vendored
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@ -2011,8 +2011,8 @@ typedef struct {
#define _SGL_INVALID_SLOT_INDEX (0)
#define _SGL_MAX_STACK_DEPTH (64)
#define _SGL_DEFAULT_PIPELINE_POOL_SIZE (64)
#define _SGL_DEFAULT_MAX_VERTICES (1<<16)
#define _SGL_DEFAULT_MAX_COMMANDS (1<<14)
#define _SGL_DEFAULT_MAX_VERTICES (1<<17)
#define _SGL_DEFAULT_MAX_COMMANDS (1<<15)
#define _SGL_SLOT_SHIFT (16)
#define _SGL_MAX_POOL_SIZE (1<<_SGL_SLOT_SHIFT)
#define _SGL_SLOT_MASK (_SGL_MAX_POOL_SIZE-1)