From c8f8de20f5ff03d94a969e23cfe77d52e10b3ab4 Mon Sep 17 00:00:00 2001
From: xengineering <mail2xengineering@protonmail.com>
Date: Fri, 21 May 2021 13:45:20 +0200
Subject: Refactor GLFW-related Code

---
 main.go | 32 +++++++++++++++-----------------
 1 file changed, 15 insertions(+), 17 deletions(-)

(limited to 'main.go')

diff --git a/main.go b/main.go
index 35a4704..e2d6e43 100644
--- a/main.go
+++ b/main.go
@@ -6,18 +6,19 @@ import (
 	"runtime"
 	"log"
 	"flag"
-
-	"github.com/go-gl/glfw/v3.3/glfw"
 )
 
-var (
-	stlFilePath string
-)
+func init() {
+	// lock this program to one OS thread (details: https://golang.org/pkg/runtime/#LockOSThread)
+	log.Println("Locking OS thread")
+	runtime.LockOSThread()
+}
 
 func main() {
 
 	// read command line arguments
-	parseFlags()
+	var stlFilePath string
+	parseFlags(&stlFilePath)
 
 	// parse STL file
 	_, err := ReadBinaryStlFile(stlFilePath)
@@ -25,13 +26,9 @@ func main() {
 		log.Fatal(err)
 	}
 
-	// lock this program to one OS thread (details: https://golang.org/pkg/runtime/#LockOSThread)
-	log.Println("Locking OS thread")
-	runtime.LockOSThread()
-
-	// init GLFW and assert termination at end of main
-	window := initGlfw()
-	defer glfw.Terminate()
+	// initialize application (includes GLFW/window)
+	var app App = newApp()
+	defer app.terminate()  // GLFW needs to be terminated!
 
 	// init OpenGL
 	program := initOpenGL()
@@ -39,12 +36,13 @@ func main() {
 	vao := makeVao(triangle)
 
 	// main loop
-	for !window.ShouldClose() {
-		draw(vao, window, program)
+	for !app.window.ShouldClose() {
+		app.handle()
+		draw(vao, program)
 	}
 }
 
-func parseFlags() {
-	flag.StringVar(&stlFilePath, "file", "myfile.stl", "path to the binary STL file")
+func parseFlags(stlFilePath *string) {
+	flag.StringVar(stlFilePath, "file", "myfile.stl", "path to the binary STL file")
 	flag.Parse()
 }
-- 
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