static void Main(string[] args)
{
Log.GlobalLevel = Log.Level.Debug;
RenderWindow app = new RenderWindow(new VideoMode(800, 600), "HP!",
Styles.Default, new ContextSettings(0, 0, 4));
app.SetFramerateLimit(60);
app.Closed += delegate { app.Close(); };
app.SetVisible(true);
app.SetActive(true);
L.I("Assuming assets in \"assets\"");
Assets assets = new Assets("assets");
LoadAnimations(assets);
Level level1 = assets.Level("level1.json");
Game game = new Game(assets, level1);
var view = new View();
int lastFrameTime = Environment.TickCount;
while (app.IsOpen) {
app.DispatchEvents();
float aspect = (float)app.Size.X / app.Size.Y;
float targetWidth = 20, targetHeight = targetWidth / aspect;
view.Reset(new FloatRect(0, 0, targetWidth, targetHeight));
app.SetView(view);
int ticks = Environment.TickCount;
float delta = (ticks - lastFrameTime) / 1000F;
lastFrameTime = ticks;
game.Update(delta);
game.Render(app);
app.Display();
}
}
public void Update(double delta, Game game) {
Vector2f accel = v2f(0, 0);
if (Math.Abs(Velocity.X) < MAX_WALK_SPEED) {
if (Keyboard.IsKeyPressed(Keyboard.Key.A)) {
accel.X -= (float)Player.SPEED_X * HorizontalInfluence;
}
if (Keyboard.IsKeyPressed(Keyboard.Key.D)) {
accel.X += (float)Player.SPEED_X * HorizontalInfluence;
}
}
if (Keyboard.IsKeyPressed(Keyboard.Key.Space) && NearGround) {
state = PhysicsState.Midair;
accel.Y -= (float) (Player.JUMP_SPEED_Y);
}
if (state == PhysicsState.Midair) accel += game.level.Gravity;
// apply unproblematic amount of gravity to facilitate
// detection of "standing on the ground" state
else accel += DETECTION_GRAVITY;
// capping
if (Velocity.Len() > Consts.MAX_VEL) {
Velocity = Velocity.Norm() * Consts.MAX_VEL;
}
Level.CollidedWith flags;
Box = game.level.ResolveCollision(Box, out flags).Check();
if ((flags & Level.CollidedWith.Bottom) == Level.CollidedWith.Bottom) {
Velocity.Y = Math.Min(0, Velocity.Y);
state = PhysicsState.Ground;
}
if ((flags & Level.CollidedWith.Left) == Level.CollidedWith.Left) {
Velocity.X = 0;
}
if ((flags & Level.CollidedWith.Right) == Level.CollidedWith.Right) {
Velocity.X = 0;
}
if ((flags & Level.CollidedWith.Top) == Level.CollidedWith.Top) {
Velocity.Y = Math.Max(0, Velocity.Y);
state = PhysicsState.Midair;
}
if ((int) flags == 0) {
// No collision, assuming midair
state = PhysicsState.Midair;
}
switch (state) {
case PhysicsState.Midair:
HorizontalInfluence = 0.3F;
LastTouchedGround += delta;
anim.Speed = 0.3;
break;
case PhysicsState.Ground:
Block below = game.level[(int) Math.Floor(Box.Center.X), (int) Math.Ceiling(Box.Center.Y)];
var friction = below.Type == null ? 32 : below.Type.Friction;
// If we're not walking, apply additional friction
if (Math.Abs(accel.X) < 0.1) Velocity.X *= (float)(1 - delta * friction).Clamp(0, 1);
Velocity.Y = 0;
HorizontalInfluence = 1F;
LastTouchedGround = 0;
anim.Speed = 1;
break;
}
// Verlet integration
Box.Position += (float)delta * (Velocity + (float)delta * accel / 2);
Velocity += (float)delta * accel;
if (Math.Abs(Velocity.X) < 1) anim.Reset();
anim.Flipped = Velocity.X < 0;
anim.Update(delta * (Velocity.X / 4));
}
