// Hint sets implementation-specific modes.
//
// http://www.khronos.org/opengles/sdk/docs/man3/html/glHint.xhtml
func Hint(target, mode Enum) {
gl.Hint(uint32(target), uint32(mode))
}
func (ctx *DrawContext) drawScreen(o *orrery.Orrery) {
fullscreen := false
gl.Viewport(0, 0, int32(ctx.width), int32(ctx.height))
gl.Hint(gl.PERSPECTIVE_CORRECTION_HINT, gl.NICEST)
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
gl.Translatef(0, 0, 0)
t_delta := time.Duration(0)
frametime := time.Second / 24
log.Printf(`ft: %v`, frametime)
frametimes := time.Duration(0)
nsamples := 0
slowest_frame := time.Duration(0)
frames_over_deadline := 0
defer func() {
log.Printf(`average frame time: %v, #sample: %d`, frametimes/time.Duration(nsamples), nsamples)
log.Printf(`slowest frame: %v, # of frames over %v: %d`, slowest_frame, frametime, frames_over_deadline)
}()
for {
t_start := time.Now()
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
ctx.cam.Update()
ctx.drawGrid()
ctx.drawParticles(o)
ctx.drawHud(o, t_delta)
ctx.win.SwapBuffers()
glfw.PollEvents()
select {
case cmd := <-ctx.cmd:
switch cmd {
case DRAW_QUIT:
return
case DRAW_FULLSCREEN:
/*
if fullscreen {
ctx.win.SetFullscreen(0)
} else {
ctx.win.SetFullscreen(sdl.WINDOW_FULLSCREEN)
}
*/
fullscreen = !fullscreen
case DRAW_TOGGLE_WIREFRAME:
ctx.wireframe = !ctx.wireframe
case DRAW_TOGGLE_VERBOSE:
ctx.verbose = !ctx.verbose
}
default:
/* ignore */
}
t_delta = time.Since(t_start)
frametimes += t_delta
nsamples++
if t_delta > slowest_frame {
slowest_frame = t_delta
}
if t_delta > frametime {
frames_over_deadline++
}
t_sleep := frametime.Nanoseconds() - t_delta.Nanoseconds()
if t_sleep > 0 {
time.Sleep(time.Duration(t_sleep) * time.Nanosecond)
}
}
}