/
draw.go
65 lines (52 loc) · 1.05 KB
/
draw.go
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package main
import (
"fmt"
"github.com/banthar/gl"
"github.com/jteeuwen/glfw"
"log"
"os"
"time"
)
var (
esc = true
now = time.Now()
logger = log.New(os.Stdout, "", 0)
)
func escHandler(k, state int) {
if k == glfw.KeyEsc && state == glfw.KeyPress {
esc = false
}
}
func timeSince() {
time.Sleep(1e+6)
s := time.Now()
glfw.SetWindowTitle(fmt.Sprintf("%.4f s", s.Sub(now).Seconds()))
now = s
}
func loop() {
e := initTriangleShaders()
if e != nil {
log.Fatalln(e.Error())
}
for esc {
gl.ClearColor(0.0, 0.0, 0.0, 0.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
drawTriangle()
glfw.SwapBuffers()
timeSince()
}
}
func main() {
if e := glfw.Init(); e != nil {
panic(e.Error())
}
defer glfw.Terminate()
if e := glfw.OpenWindow(468, 320, 0, 0, 0, 0, 0, 0, glfw.Windowed); e != nil {
panic(e.Error())
}
if gl.Init() != 0 {
panic("GL Err")
}
glfw.SetKeyCallback(escHandler)
loop()
}