func setupGL() {
gl.ShadeModel(gl.FLAT)
gl.ClearColor(0.75, 0.75, 0.75, 1.0)
gl.Enable(gl.DEPTH_TEST)
gl.LineWidth(1)
gl.Viewport(0, 0, winWidth, winHeight)
gl.Hint(gl.PERSPECTIVE_CORRECTION_HINT, gl.NICEST)
gluPerspective(45, float64(winWidth)/winHeight, 10, 1000)
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
}
func windowLoop(window *sdl.Window) {
data := &renderData{}
data.renderSections = true
data.zoom = -250
data.nodes = loadTree("cmd/packer/test.priv.oct")
data.box = genBox()
defer gl.DeleteLists(data.box, 1)
buttonDown := false
t := float64(sdl.GetTicks())
for {
ticks := float64(sdl.GetTicks()) * 0.001
dt := ticks - t
t = ticks
for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
switch t := event.(type) {
case *sdl.QuitEvent:
return
case *sdl.KeyDownEvent:
switch t.Keysym.Sym {
case sdl.K_ESCAPE:
return
case sdl.K_SPACE:
data.renderSections = !data.renderSections
case sdl.K_PLUS:
data.minNodeSize += 1.0
case sdl.K_MINUS:
data.minNodeSize -= 1.0
}
case *sdl.MouseButtonEvent:
if t.State == 1 {
buttonDown = true
} else {
buttonDown = false
}
case *sdl.MouseMotionEvent:
if buttonDown {
data.xrot += dt * float64(t.YRel) * rotSpeed
data.yrot += dt * float64(t.XRel) * rotSpeed
}
case *sdl.MouseWheelEvent:
data.zoom += dt * float64(t.Y) * rotSpeed
}
}
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
renderTree(data, &data.nodes[0], point3d{0, 0, 0}, 100)
gl.Disable(gl.DEPTH_TEST)
drawAxis(data)
gl.Enable(gl.DEPTH_TEST)
sdl.GL_SwapWindow(window)
if glErr := gl.GetError(); glErr != gl.NO_ERROR {
panic(fmt.Errorf("GL error: %x", glErr))
}
}
}