examples: rename hot_code_reloading to hot_reload

examples/hot_reload/graph.v

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