public Viewer(Window wnd)
{
wnd.Paint += (sender, e) => Render();
wnd.KeyDown += delegate(object sender, KeyDownEventArgs e) {
switch (e.KeySym.scancode)
{
case SDL.SDL_Scancode.SDL_SCANCODE_R:
_rotate = Matrix.Identity();
_translate = Matrix.Identity();
_scale = Matrix.Identity();
break;
case SDL.SDL_Scancode.SDL_SCANCODE_LEFTBRACKET:
_scale = Matrix.Scale(1 / 1.2, 1 / 1.2, 1 / 1.2) * _scale;
break;
case SDL.SDL_Scancode.SDL_SCANCODE_RIGHTBRACKET:
_scale = Matrix.Scale(1.2, 1.2, 1.2) * _scale;
break;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_PLUS:
_horizon *= 1.2;
RefreshProjection();
break;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_MINUS:
_horizon /= 1.2;
RefreshProjection();
break;
case SDL.SDL_Scancode.SDL_SCANCODE_F:
_fill = !_fill;
break;
case SDL.SDL_Scancode.SDL_SCANCODE_W:
_wireframe = !_wireframe;
break;
case SDL.SDL_Scancode.SDL_SCANCODE_P:
switch (_currentProjection)
{
case Projections.Perspective:
_isPerspectiveProjection = false;
_pp_alpah = 45;
_pp_beta = 45;
_currentProjection = Projections.Isometric;
break;
case Projections.Isometric:
_isPerspectiveProjection = false;
_pp_alpah = 0.5;
_pp_beta = 66.4;
_currentProjection = Projections.Cabinet;
break;
case Projections.Cabinet:
_isPerspectiveProjection = false;
_pp_alpah = 1;
_pp_beta = 45;
_currentProjection = Projections.Cavalier;
break;
case Projections.Cavalier:
_isPerspectiveProjection = false;
_pp_alpah = 0;
_pp_beta = 90;
_currentProjection = Projections.Orthogonal;
break;
case Projections.Orthogonal:
_isPerspectiveProjection = true;
_currentProjection = Projections.Perspective;
break;
}
RefreshProjection();
break;
case SDL.SDL_Scancode.SDL_SCANCODE_M:
_models.RemoveAt(0);
_models.Add(_model);
_model = _models[0];
wnd.Title = string.Format("3D Viewer ({0})", _model.Name);
break;
}
_update = true;
};
_wnd = wnd;
foreach (var path in Directory.GetFiles("Models"))
{
_models.Add(Model.FromFile(path));
}
_model = _models[0];
_renderer = wnd.CreateRenderer();
wnd.WindowResized += delegate(object sender, WindowResizedEventArgs e) {
RefreshProjection();
_update = true;
};
RefreshProjection();
wnd.MouseMotion += delegate(object sender, MouseMotionEventArgs e) {
if (e.Button == MouseButton.Left)
{
var dist = _translate[2, 3];
var scale = 1 - (-dist / _horizon);
_translate *= Matrix.Translation(
e.RelativeX * scale,
e.RelativeY * scale,
0
);
_update = true;
}
else if (e.Button == MouseButton.Right)
{
var rotx = Matrix.RotationX(-e.RelativeX * (Math.PI / 180d));
var roty = Matrix.RotationY(e.RelativeY * (Math.PI / 180d));
var rot = rotx * roty;
_rotate = rot * _rotate;
_update = true;
}
else
{
Lights[0, 0].X = e.X - _wnd.Width / 2;
Lights[0, 0].Y = e.Y - _wnd.Height / 2;
_update = true;
}
};
wnd.MouseWheel += delegate(object sender, MouseWheelEventArgs e) {
_translate = Matrix.Translation(0, 0, 100 * e.Y) * _translate;
_update = true;
return;
};
Render();
}