public (CastRef <PhysicsObject>, PhysicsObject) Create(IScene scene)
{
// Scale vertices of body template
BodyTemplate bodyTemplateCopy = BodyTemplate.Scale(Scale);
PhysicsObject physicsObject = PhysicsObject ?? new PhysicsObject();
physicsObject.Texture = Texture;
physicsObject.Scale = Scale;
CastRef <PhysicsObject> poref = scene.SetupPhysicsObject(physicsObject, bodyTemplateCopy);
physicsObject.Body.Position = Position;
physicsObject.Body.Rotation = Rotation;
physicsObject.Depth = Depth;
physicsObject.Body.Tag = physicsObject;
physicsObject.Body.LocalCenter = Vector2.Zero;
CalculateVertices(physicsObject);
if (!Offset.HasValue)
{
physicsObject.Offset = new Vector2(Texture.Width * 0.5f, Texture.Height * 0.5f);
}
return(poref, physicsObject);
}
public void LoadContent(ContentManager content)
{
spriteBatchEffect = new BasicEffect(graphics);
spriteBatchEffect.TextureEnabled = true;
liveContent.ReadMetadata("Content.yaml");
Texture2D shipTexture = liveContent.GetTexture("Hulls/ship.png");
Texture2D squareTexture = liveContent.GetTexture("square.png");
Texture2D asteroid1Texture = liveContent.GetTexture("Sprites/Asteroids/asteroid1.png");
Texture2D asteroid2Texture = liveContent.GetTexture("Sprites/Asteroids/asteroid2.png");
Texture2D asteroid3Texture = liveContent.GetTexture("Sprites/Asteroids/asteroid3.png");
Texture2D asteroid4Texture = liveContent.GetTexture("Sprites/Asteroids/asteroid4.png");
Texture2D[] asteroidTextures = { asteroid1Texture, asteroid2Texture, asteroid3Texture, asteroid4Texture };
// Body templates
bodyTemplates = PhysicsShapeLoader.LoadBodies(File.ReadAllText("./content/Bodies.xml"));
// Scene setup
var enemyShipRef = CreateShip(shipTexture, bodyTemplates["ship"], new Vector2(-5, 0), shipTexture, bodyTemplates["square"], 40);
shipRef = CreateShip(shipTexture, bodyTemplates["ship"], new Vector2(0, 0), shipTexture, bodyTemplates["square"], 20);
PhysicsObjectTemplate[] asteroidTemplates = new PhysicsObjectTemplate[4];
for (int j = 0; j < 4; j++)
{
asteroidTemplates[j] = new PhysicsObjectTemplate
{
BodyTemplate = bodyTemplates[$"asteroid{j+1}"],
Texture = asteroidTextures[j]
};
}
for (int i = 0; i < 200; i++)
{
var type = (int)(Mathf.Bias(Mathf.Random(0, 1), 0.3f) * 4);
var template = asteroidTemplates[type];
float radius = 100;
do
{
template.Position = new Vector2(Mathf.Random(-radius, radius), Mathf.Random(-radius, radius));
} while (template.Position.LengthSquared() < 100);
var po = template.Create(this).Item2;
po.Body.Rotation = Mathf.Random(0, Mathf.TAU);
po.Body.AngularVelocity = Mathf.Random(-1, 1) / po.Body.Mass;
po.Body.LinearVelocity = Mathf.Random(0, 0.1f) * Mathf.RandomUnit() / po.Body.Mass;
}
polygonEffect = new BasicEffect(graphics);
polygonEffect.VertexColorEnabled = true;
}
public CastRef <PhysicsObject> SetupPhysicsObject(PhysicsObject physicsObject, BodyTemplate bodyTemplate)
{
var body = bodyTemplate.Create(physicsWorld);
body.BodyType = BodyType.Dynamic;
body.SleepingAllowed = false;
physicsObject.Body = body;
var entityRef = SetupGameObject(physicsObject);
var poRef = new CastRef <PhysicsObject>(entityRef);
poRef.EntityRef.RegisterRemovedCallback(PhysicsObjectDestroyed);
physicsObjects.Add(poRef);
return(poRef);
}
public void Destroy <T>(CastRef <T> castRef) where T : GameObject
{
gameObjects.Remove(castRef.EntityRef);
}