My basic implementation of a Farseer world has been behaving very strangely. It seems as though there is a very low maximum velocity, and collisions result in the small spheres involved clipping through each other.
using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;
using FarseerPhysics.Collision.Shapes;
using FarseerPhysics.Common;
using FarseerPhysics.Dynamics;
using FarseerPhysics.Factories;
namespace Farseer_Science_
{
/// <summary>
/// This is the main type for your game
/// </summary>
public class Game1 : Microsoft.Xna.Framework.Game
{
GraphicsDeviceManager graphics;
SpriteBatch spriteBatch;
private World world;
List<Body> elementList = new List<Body>();
private Body groundBody;
private Texture2D textureWater;
private Texture2D textureMagnesium;
private Texture2D textureCursor;
private Texture2D textureGround;
private Color mouseColor = Color.White;
MouseState state = new MouseState();
private Vector2 mousePosition;
MouseState oldState;
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
world = new World(new Vector2(0, 2));
}
/// <summary>
/// Allows the game to perform any initialization it needs to before starting to run.
/// This is where it can query for any required services and load any non-graphic
/// related content. Calling base.Initialize will enumerate through any components
/// and initialize them as well.
/// </summary>
protected override void Initialize()
{
groundBody = BodyFactory.CreateRectangle(world, 2000f, 50f, 16f, new Vector2(0f, 250f));
groundBody.IsStatic = true;
groundBody.Restitution = 0.5f;
groundBody.Friction = 5f;
base.Initialize();
}
/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(GraphicsDevice);
textureMagnesium = Content.Load<Texture2D>("textureMagnesium");
textureWater = Content.Load<Texture2D>("textureWater");
textureCursor = Content.Load<Texture2D>("textureCursor");
textureGround = Content.Load<Texture2D>("textureGround");
// TODO: use this.Content to load your game content here
}
/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();
// TODO: Add your update logic here
mousePosition = HandleMouse();
world.Step(0.1f);
base.Update(gameTime);
}
private Vector2 HandleMouse()
{
state = Mouse.GetState();
if (state.LeftButton == ButtonState.Pressed)
{
mouseColor = Color.Red;
if (oldState.LeftButton == ButtonState.Released)
{
elementList.Add(BodyFactory.CreateCircle(world, 16, 100f));
elementList[elementList.Count - 1].Position = new Vector2(state.X - 16, state.Y - 16);
elementList[elementList.Count - 1].BodyType = BodyType.Dynamic;
elementList[elementList.Count - 1].Restitution = 0.5f;
elementList[elementList.Count - 1].Friction = 1f;
}
}
else
{
mouseColor = Color.White;
}
oldState = state;
return new Vector2(state.X, state.Y);
}
/// <summary>
/// This is called when the game should draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.CornflowerBlue);
spriteBatch.Begin();
foreach (Body element in elementList)
{
spriteBatch.Draw(textureMagnesium, element.Position, Color.White);
}
spriteBatch.Draw(textureGround, groundBody.Position, Color.White);
spriteBatch.Draw(textureCursor, mousePosition, mouseColor);
spriteBatch.End();
base.Draw(gameTime);
}
}
}
