public void Step(float elapsed, Simulation sim)
{
Vector2 thisPos;
Vector2 thisDelta;
Vector2 thisTarget;
LineSegment<Vector2> thisSegment;
float thisDistance;
var target = new Vector2();
var distance = 0f;
var hasTarget = false;
for (int i = 0; i < sim.Balls.Length; i++) {
if (sim.Balls[i].Carrier != null) {
thisPos = sim.Balls[i].Carrier.Fixture.Body.Position;
SegmentFor(thisPos, out thisSegment, out thisDelta);
thisTarget = Trig.ClosestPointOnSegment(thisSegment, thisPos);
thisTarget += thisDelta;
}
else {
thisPos = sim.Balls[i].Fixture.Body.Position;
SegmentFor(thisPos, out thisSegment, out thisDelta);
var ballStop = sim.Balls[i].BallStop;
LineSegment<Vector2> ballVector;
ballVector.A = thisPos;
ballVector.B = ballStop;
if (!Trig.SegmentSegmentIntersection(ballVector, thisSegment, out thisTarget)) {
thisTarget = Trig.ClosestPointOnSegment(thisSegment, thisPos);
}
thisTarget += thisDelta;
}
thisDistance = Trig.DistanceSquared(Fixture.Body.Position, thisPos);
if (!hasTarget || thisDistance < distance) {
target = thisTarget;
distance = thisDistance;
hasTarget = true;
}
}
if (!hasTarget) return;
var delta = target - Fixture.Body.Position;
if (delta.X == 0 && delta.Y == 0) {
Fixture.Body.LinearVelocity = new Vector2(0f, 0f);
return;
}
var direction = delta;
direction.Normalize();
var moveDistance = Trig.DistanceSquared(Fixture.Body.Position, target);
if (moveDistance <= speed * elapsed * speed * elapsed) {
Fixture.Body.LinearVelocity = delta/elapsed;
return;
}
Fixture.Body.LinearVelocity = direction * speed;
}
public Ball(Simulation sim, BallData spawn)
{
simulation = sim;
var body = new Body(sim.World);
var shape = new CircleShape(radius, 1f);
body.BodyType = BodyType.Dynamic;
body.FixedRotation = true;
body.LinearDamping = drag;
body.IsBullet = true;
Fixture = body.CreateFixture(shape);
Fixture.Restitution = restitution;
Fixture.Friction = 0f;
Carrier = null;
SpawnPos = spawn.Position;
Spawn();
}
void HandleLoad(object sender, EventArgs e)
{
Programs.Load();
Fps = new Fps();
Starfield = new Starfield();
MapMesh = new MapMesh(map);
GoalMesh = new SensorMesh<GoalCompiled>(map.Goals, new Texture("Images/goal.png"));
SpeedupMesh = new SensorMesh<SpeedupCompiled>(map.Speedups, new Texture("Images/speedup.png"));
ShipMesh = new ObjMesh("Models/ship.obj");
BallMesh = new ObjMesh("Models/ball.obj");
GoalieMesh = new ObjMesh("Models/goalie.obj");
Simulation = new Simulation(map);
Ship = Simulation.Ships[0];
Nebula = new Image("Images/nebula.png", GameWindow.Width, GameWindow.Height);
BallSpawn = new Image("Images/ballspawn.png", -1f, 1f, -1f, 1f);
GL.ClearColor(Color.Black);
GL.ClearDepth(1.0f);
GL.Enable(EnableCap.DepthTest);
GL.DepthFunc(DepthFunction.Lequal);
GL.Enable(EnableCap.CullFace);
GL.CullFace(CullFaceMode.Back);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.Hint(HintTarget.PerspectiveCorrectionHint, HintMode.Nicest);
GL.Hint(HintTarget.GenerateMipmapHint, HintMode.Nicest);
GL.Hint(HintTarget.LineSmoothHint, HintMode.Nicest);
GL.Hint(HintTarget.PointSmoothHint, HintMode.Nicest);
GL.Hint(HintTarget.PolygonSmoothHint, HintMode.Nicest);
Programs.Material.Use();
Programs.Material.LightDiffuse = light_diffuse;
Programs.Material.LightAmbient = light_ambient;
Programs.Material.LightSpecular = light_specular;
Programs.Material.LightPosition = light_position;
}