AstralTransRocketries/TrueCraft
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Fix issues with client physics, implement jumping

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Still a bit janky with jumping.

Fixes #146
This commit is contained in:
Drew DeVault 2015-09-20 17:45:15 -04:00
parent 35bac852e6
commit 8819ccf27e
6 changed files with 51 additions and 430 deletions
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12
TrueCraft.Client/MultiplayerClient.cs
View File

@ -15,6 +15,7 @@ using System.ComponentModel;
using System.IO;
using TrueCraft.Core;
using TrueCraft.API.Physics;
using TrueCraft.Core.Physics;
namespace TrueCraft.Client
{
@ -68,7 +69,7 @@ namespace TrueCraft.Client
repo.DiscoverBlockProviders();
World.World.BlockRepository = repo;
World.World.ChunkProvider = new EmptyGenerator();
Physics = new PhysicsEngine(World, repo);
Physics = new PhysicsEngine(World.World, repo);
SocketPool = new SocketAsyncEventArgsPool(100, 200, 65536);
connected = 0;
cancel = new CancellationTokenSource();
@ -292,7 +293,8 @@ namespace TrueCraft.Client
{
if (_Position != value)
{
QueuePacket(new PlayerPositionAndLookPacket(value.X, value.Y, value.Y + Height, value.Z, Yaw, Pitch, false));
QueuePacket(new PlayerPositionAndLookPacket(value.X, value.Y, value.Y + Height,
value.Z, Yaw, Pitch, false));
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("Position"));
}
@ -306,7 +308,7 @@ namespace TrueCraft.Client
{
get
{
return 0.08f;
return 1.98f;
}
}
@ -314,7 +316,7 @@ namespace TrueCraft.Client
{
get
{
return 0.02f;
return 0.40f;
}
}
@ -322,7 +324,7 @@ namespace TrueCraft.Client
{
get
{
return 3.92f;
return 78.4f;
}
}

405
TrueCraft.Client/PhysicsEngine.cs
View File

@ -1,405 +0,0 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using TrueCraft.Core.World;
using TrueCraft.API.Entities;
using TrueCraft.API.World;
using TrueCraft.API;
using TrueCraft.API.Physics;
namespace TrueCraft.Client
{
// This is a stripped down version of the physics engine that the server uses
// The only thing we use it for is our own movement
public class PhysicsEngine
{
public PhysicsEngine(ReadOnlyWorld world, IBlockPhysicsProvider physicsProvider)
{
World = world;
Entities = new List<IPhysicsEntity>();
EntityLock = new object();
LastUpdate = DateTime.MinValue;
BlockPhysicsProvider = physicsProvider;
MillisecondsBetweenUpdates = 1000 / 20;
}
public int MillisecondsBetweenUpdates { get; set; }
public ReadOnlyWorld World { get; set; }
public IBlockPhysicsProvider BlockPhysicsProvider { get; set; }
public List<IPhysicsEntity> Entities { get; set; }
private object EntityLock { get; set; }
private DateTime LastUpdate { get; set; }
public void AddEntity(IPhysicsEntity entity)
{
if (Entities.Contains(entity))
return;
lock (EntityLock)
Entities.Add(entity);
}
public void RemoveEntity(IPhysicsEntity entity)
{
if (!Entities.Contains(entity))
return;
lock (EntityLock)
Entities.Remove(entity);
}
private BoundingBox TempBoundingBox;
public void Update()
{
double multipler = (DateTime.UtcNow - LastUpdate).TotalMilliseconds / MillisecondsBetweenUpdates;
if (LastUpdate == DateTime.MinValue)
multipler = 1;
if (multipler > 5) multipler = 5;
if (multipler < 0.1) multipler = 0.1;
lock (EntityLock)
{
for (int i = 0; i < Entities.Count; i++)
{
var entity = Entities[i];
if (entity.BeginUpdate())
{
entity.Velocity -= new Vector3(0, entity.AccelerationDueToGravity * multipler, 0);
entity.Velocity.Clamp(entity.TerminalVelocity);
if (entity is IAABBEntity)
CheckWithTerrain((IAABBEntity)entity, World);
entity.EndUpdate(entity.Position + entity.Velocity);
}
}
}
LastUpdate = DateTime.UtcNow;
}
private void CheckWithTerrain(IAABBEntity entity, ReadOnlyWorld world)
{
Vector3 collisionPoint, collisionDirection;
if (entity.Position.Y > 0 && entity.Position.Y <= 127) // Don't do checks outside the map
{
bool fireEvent = entity.Velocity != Vector3.Zero;
// Do terrain collisions
if (AdjustVelocityX(entity, world, out collisionPoint, out collisionDirection))
{
if (fireEvent)
entity.TerrainCollision(collisionPoint, collisionDirection);
}
if (AdjustVelocityY(entity, world, out collisionPoint, out collisionDirection))
{
entity.Velocity *= new Vector3(0.1, 1, 0.1); // TODO: More sophisticated friction
if (fireEvent)
entity.TerrainCollision(collisionPoint, collisionDirection);
}
if (AdjustVelocityZ(entity, world, out collisionPoint, out collisionDirection))
{
if (fireEvent)
entity.TerrainCollision(collisionPoint, collisionDirection);
}
}
}
// TODO: There's a lot of code replication here, perhaps it can be consolidated
/// <summary>
/// Performs terrain collision tests and adjusts the X-axis velocity accordingly
/// </summary>
/// <returns>True if the entity collides with the terrain</returns>
private bool AdjustVelocityX(IAABBEntity entity, ReadOnlyWorld world, out Vector3 collision, out Vector3 collisionDirection)
{
collision = Vector3.Zero;
collisionDirection = Vector3.Zero;
if (entity.Velocity.X == 0)
return false;
// Do some enviornment guessing to improve speed
int minY = (int)entity.Position.Y - (entity.Position.Y < 0 ? 1 : 0);
int maxY = (int)(entity.Position.Y + entity.Size.Width) - (entity.Position.Y < 0 ? 1 : 0);
int minZ = (int)entity.Position.Z - (entity.Position.Z < 0 ? 1 : 0);
int maxZ = (int)(entity.Position.Z + entity.Size.Depth) - (entity.Position.Z < 0 ? 1 : 0);
int minX, maxX;
// Expand bounding box to include area to be tested
if (entity.Velocity.X < 0)
{
TempBoundingBox = new BoundingBox(
new Vector3(entity.BoundingBox.Min.X + entity.Velocity.X, entity.BoundingBox.Min.Y, entity.BoundingBox.Min.Z),
entity.BoundingBox.Max);
maxX = (int)(TempBoundingBox.Max.X);
minX = (int)(TempBoundingBox.Min.X + entity.Velocity.X) - 1;
}
else
{
TempBoundingBox = new BoundingBox(
entity.BoundingBox.Min,
new Vector3(entity.BoundingBox.Max.X + entity.Velocity.X, entity.BoundingBox.Max.Y, entity.BoundingBox.Max.Z));
minX = (int)(entity.BoundingBox.Min.X);
maxX = (int)(entity.BoundingBox.Max.X + entity.Velocity.X) + 1;
}
// Do terrain checks
double? collisionPoint = null;
BoundingBox blockBox;
for (int x = minX; x <= maxX; x++)
{
for (int y = minY; y <= maxY; y++)
{
for (int z = minZ; z <= maxZ; z++)
{
var position = new Coordinates3D(x, y, z);
var boundingBox = BlockPhysicsProvider.GetBoundingBox(world.World, position);
if (boundingBox == null)
continue;
blockBox = boundingBox.Value.OffsetBy(position + new Vector3(0.5));
if (TempBoundingBox.Intersects(blockBox))
{
if (entity.Velocity.X < 0)
{
if (!collisionPoint.HasValue)
collisionPoint = blockBox.Max.X;
else if (collisionPoint.Value < blockBox.Max.X)
collisionPoint = blockBox.Max.X;
}
else
{
if (!collisionPoint.HasValue)
collisionPoint = blockBox.Min.X;
else if (collisionPoint.Value > blockBox.Min.X)
collisionPoint = blockBox.Min.X;
}
collision = position;
}
}
}
}
if (collisionPoint != null)
{
if (entity.Velocity.X < 0)
{
entity.Velocity = new Vector3(
entity.Velocity.X - (TempBoundingBox.Min.X - collisionPoint.Value),
entity.Velocity.Y,
entity.Velocity.Z);
collisionDirection = Vector3.Left;
}
else if (entity.Velocity.X > 0)
{
entity.Velocity = new Vector3(
entity.Velocity.X - (TempBoundingBox.Max.X - collisionPoint.Value),
entity.Velocity.Y,
entity.Velocity.Z);
collisionDirection = Vector3.Right;
}
return true;
}
return false;
}
/// <summary>
/// Performs terrain collision tests and adjusts the Y-axis velocity accordingly
/// </summary>
/// <returns>True if the entity collides with the terrain</returns>
private bool AdjustVelocityY(IAABBEntity entity, ReadOnlyWorld world, out Vector3 collision, out Vector3 collisionDirection)
{
collision = Vector3.Zero;
collisionDirection = Vector3.Zero;
if (entity.Velocity.Y == 0)
return false;
// Do some enviornment guessing to improve speed
int minX = (int)entity.Position.X - (entity.Position.X < 0 ? 1 : 0);
int maxX = (int)(entity.Position.X + entity.Size.Width) - (entity.Position.X < 0 ? 1 : 0);
int minZ = (int)entity.Position.Z - (entity.Position.Z < 0 ? 1 : 0);
int maxZ = (int)(entity.Position.Z + entity.Size.Depth) - (entity.Position.Z < 0 ? 1 : 0);
int minY, maxY;
// Expand bounding box to include area to be tested
if (entity.Velocity.Y < 0)
{
TempBoundingBox = new BoundingBox(
new Vector3(entity.BoundingBox.Min.X, entity.BoundingBox.Min.Y + entity.Velocity.Y, entity.BoundingBox.Min.Z),
entity.BoundingBox.Max);
maxY = (int)(TempBoundingBox.Max.Y);
minY = (int)(TempBoundingBox.Min.Y + entity.Velocity.Y) - 1;
}
else
{
TempBoundingBox = new BoundingBox(
entity.BoundingBox.Min,
new Vector3(entity.BoundingBox.Max.X, entity.BoundingBox.Max.Y + entity.Velocity.Y, entity.BoundingBox.Max.Z));
minY = (int)(entity.BoundingBox.Min.Y);
maxY = (int)(entity.BoundingBox.Max.Y + entity.Velocity.Y) + 1;
}
// Clamp Y into map boundaries
if (minY < 0)
minY = 0;
if (minY >= TrueCraft.Core.World.World.Height)
minY = TrueCraft.Core.World.World.Height - 1;
if (maxY < 0)
maxY = 0;
if (maxY >= TrueCraft.Core.World.World.Height)
maxY = TrueCraft.Core.World.World.Height - 1;
// Do terrain checks
double? collisionPoint = null;
BoundingBox blockBox;
for (int x = minX; x <= maxX; x++)
{
for (int y = minY; y <= maxY; y++)
{
for (int z = minZ; z <= maxZ; z++)
{
var position = new Coordinates3D(x, y, z);
if (!World.IsValidPosition(position))
continue;
var boundingBox = BlockPhysicsProvider.GetBoundingBox(world.World, position);
if (boundingBox == null)
continue;
blockBox = boundingBox.Value.OffsetBy(position + new Vector3(0.5));
if (TempBoundingBox.Intersects(blockBox))
{
if (entity.Velocity.Y < 0)
{
if (!collisionPoint.HasValue)
collisionPoint = blockBox.Max.Y;
else if (collisionPoint.Value < blockBox.Max.Y)
collisionPoint = blockBox.Max.Y;
}
else
{
if (!collisionPoint.HasValue)
collisionPoint = blockBox.Min.Y;
else if (collisionPoint.Value > blockBox.Min.Y)
collisionPoint = blockBox.Min.Y;
}
collision = position;
}
}
}
}
if (collisionPoint != null)
{
if (entity.Velocity.Y < 0)
{
// TODO: Do block event
//var block = world.GetBlock(collision);
//block.OnBlockWalkedOn(world, collision, this);
entity.Velocity = new Vector3(entity.Velocity.X,
entity.Velocity.Y + (collisionPoint.Value - TempBoundingBox.Min.Y),
entity.Velocity.Z);
collisionDirection = Vector3.Down;
}
else if (entity.Velocity.Y > 0)
{
entity.Velocity = new Vector3(entity.Velocity.X,
entity.Velocity.Y - (TempBoundingBox.Max.Y - collisionPoint.Value),
entity.Velocity.Z);
collisionDirection = Vector3.Up;
}
return true;
}
return false;
}
/// <summary>
/// Performs terrain collision tests and adjusts the Z-axis velocity accordingly
/// </summary>
/// <returns>True if the entity collides with the terrain</returns>
private bool AdjustVelocityZ(IAABBEntity entity, ReadOnlyWorld world, out Vector3 collision, out Vector3 collisionDirection)
{
collision = Vector3.Zero;
collisionDirection = Vector3.Zero;
if (entity.Velocity.Z == 0)
return false;
// Do some enviornment guessing to improve speed
int minX = (int)entity.Position.X - (entity.Position.X < 0 ? 1 : 0);
int maxX = (int)(entity.Position.X + entity.Size.Depth) - (entity.Position.X < 0 ? 1 : 0);
int minY = (int)entity.Position.Y - (entity.Position.Y < 0 ? 1 : 0);
int maxY = (int)(entity.Position.Y + entity.Size.Width) - (entity.Position.Y < 0 ? 1 : 0);
int minZ, maxZ;
// Expand bounding box to include area to be tested
if (entity.Velocity.Z < 0)
{
TempBoundingBox = new BoundingBox(
new Vector3(entity.BoundingBox.Min.X, entity.BoundingBox.Min.Y, entity.BoundingBox.Min.Z + entity.Velocity.Z),
entity.BoundingBox.Max);
maxZ = (int)(TempBoundingBox.Max.Z);
minZ = (int)(TempBoundingBox.Min.Z + entity.Velocity.Z) - 1;
}
else
{
TempBoundingBox = new BoundingBox(
entity.BoundingBox.Min,
new Vector3(entity.BoundingBox.Max.X, entity.BoundingBox.Max.Y, entity.BoundingBox.Max.Z + entity.Velocity.Z)
);
minZ = (int)(entity.BoundingBox.Min.Z);
maxZ = (int)(entity.BoundingBox.Max.Z + entity.Velocity.Z) + 1;
}
// Do terrain checks
double? collisionPoint = null;
BoundingBox blockBox;
for (int x = minX; x <= maxX; x++)
{
for (int y = minY; y <= maxY; y++)
{
for (int z = minZ; z <= maxZ; z++)
{
var position = new Coordinates3D(x, y, z);
var boundingBox = BlockPhysicsProvider.GetBoundingBox(world.World, position);
if (boundingBox == null)
continue;
blockBox = boundingBox.Value.OffsetBy(position + new Vector3(0.5));
if (TempBoundingBox.Intersects(blockBox))
{
if (entity.Velocity.Z < 0)
{
if (!collisionPoint.HasValue)
collisionPoint = blockBox.Max.Z;
else if (collisionPoint.Value < blockBox.Max.Z)
collisionPoint = blockBox.Max.Z;
}
else
{
if (!collisionPoint.HasValue)
collisionPoint = blockBox.Min.Z;
else if (collisionPoint.Value > blockBox.Min.Z)
collisionPoint = blockBox.Min.Z;
}
collision = position;
}
}
}
}
if (collisionPoint != null)
{
if (entity.Velocity.Z < 0)
{
entity.Velocity = new Vector3(
entity.Velocity.X,
entity.Velocity.Y,
entity.Velocity.Z - (TempBoundingBox.Min.Z - collisionPoint.Value));
collisionDirection = Vector3.Backwards;
}
else if (entity.Velocity.Z > 0)
{
entity.Velocity = new Vector3(
entity.Velocity.X,
entity.Velocity.Y,
entity.Velocity.Z - (TempBoundingBox.Max.Z - collisionPoint.Value));
collisionDirection = Vector3.Forwards;
}
return true;
}
return false;
}
}
}

1
TrueCraft.Client/TrueCraft.Client.csproj
View File

@ -109,7 +109,6 @@
<Compile Include="Handlers\ChunkHandler.cs" />
<Compile Include="ReadOnlyWorld.cs" />
<Compile Include="Events\ChunkEventArgs.cs" />
<Compile Include="PhysicsEngine.cs" />
<Compile Include="Rendering\Mesh.cs" />
<Compile Include="Rendering\BlockRenderer.cs" />
<Compile Include="Rendering\ChunkMesh.cs" />

43
TrueCraft.Client/TrueCraftGame.cs
View File

@ -28,6 +28,7 @@ namespace TrueCraft.Client
private SpriteBatch SpriteBatch { get; set; }
private IPEndPoint EndPoint { get; set; }
private ChunkRenderer ChunkConverter { get; set; }
private DateTime LastPhysicsUpdate { get; set; }
private DateTime NextPhysicsUpdate { get; set; }
private List<Mesh> ChunkMeshes { get; set; }
public ConcurrentBag<Action> PendingMainThreadActions { get; set; }
@ -58,6 +59,7 @@ namespace TrueCraft.Client
Graphics.PreferredBackBufferHeight = UserSettings.Local.WindowResolution.Height;
Client = client;
EndPoint = endPoint;
LastPhysicsUpdate = DateTime.MinValue;
NextPhysicsUpdate = DateTime.MinValue;
ChunkMeshes = new List<Mesh>();
IncomingChunks = new ConcurrentBag<Mesh>();
@ -219,38 +221,50 @@ namespace TrueCraft.Client
foreach (var item in Interfaces)
{
item.Scale = (InterfaceScale)(item.Scale + 1);
if ((int)item.Scale > 2) item.Scale = InterfaceScale.Small;
if ((int)item.Scale > 2)
item.Scale = InterfaceScale.Small;
}
break;
// Move to the left.
case Keys.A:
case Keys.Left:
if (ChatInterface.HasFocus) break;
if (ChatInterface.HasFocus)
break;
Delta += Microsoft.Xna.Framework.Vector3.Left;
break;
// Move to the right.
case Keys.D:
case Keys.Right:
if (ChatInterface.HasFocus) break;
if (ChatInterface.HasFocus)
break;
Delta += Microsoft.Xna.Framework.Vector3.Right;
break;
// Move forwards.
case Keys.W:
case Keys.Up:
if (ChatInterface.HasFocus) break;
if (ChatInterface.HasFocus)
break;
Delta += Microsoft.Xna.Framework.Vector3.Forward;
break;
// Move backwards.
case Keys.S:
case Keys.Down:
if (ChatInterface.HasFocus) break;
if (ChatInterface.HasFocus)
break;
Delta += Microsoft.Xna.Framework.Vector3.Backward;
break;
case Keys.Space:
if (ChatInterface.HasFocus)
break;
if (Math.Floor(Client.Position.Y) == Client.Position.Y) // Crappy onground substitute
Client.Velocity += TrueCraft.API.Vector3.Up * 0.3;
break;
// Toggle mouse capture.
case Keys.Tab:
MouseCaptured = !MouseCaptured;
@ -343,15 +357,15 @@ namespace TrueCraft.Client
if (PendingMainThreadActions.TryTake(out action))
action();
if (NextPhysicsUpdate < DateTime.UtcNow && Client.LoggedIn)
{
IChunk chunk;
var adjusted = Client.World.World.FindBlockPosition(new Coordinates3D((int)Client.Position.X, 0, (int)Client.Position.Z), out chunk);
if (chunk != null)
{
if (chunk.GetHeight((byte)adjusted.X, (byte)adjusted.Z) != 0)
Client.Physics.Update();
Client.Physics.Update(gameTime.ElapsedGameTime);
}
if (NextPhysicsUpdate < DateTime.UtcNow && Client.LoggedIn)
{
// NOTE: This is to make the vanilla server send us chunk packets
// We should eventually make some means of detecing that we're on a vanilla server to enable this
// It's a waste of bandwidth to do it on a TrueCraft server
@ -366,10 +380,17 @@ namespace TrueCraft.Client
var lookAt = Microsoft.Xna.Framework.Vector3.Transform(
Delta, Matrix.CreateRotationY(Microsoft.Xna.Framework.MathHelper.ToRadians(Client.Yaw)));
Client.Position += new TrueCraft.API.Vector3(lookAt.X, lookAt.Y, lookAt.Z)
* (gameTime.ElapsedGameTime.TotalSeconds * 4.3717);
lookAt.X *= (float)(gameTime.ElapsedGameTime.TotalSeconds * 4.3717);
lookAt.Z *= (float)(gameTime.ElapsedGameTime.TotalSeconds * 4.3717);
Client.Velocity = new TrueCraft.API.Vector3(lookAt.X, Client.Velocity.Y, lookAt.Z);
}
else
{
Client.Velocity *= new TrueCraft.API.Vector3(0, 1, 0);
}
UpdateCamera();
base.Update(gameTime);
}
@ -377,7 +398,7 @@ namespace TrueCraft.Client
{
Camera.Position = new TrueCraft.API.Vector3(
Client.Position.X,
Client.Position.Y + (Client.Size.Height / 2),
Client.Position.Y + (Client.Size.Height - 0.3),
Client.Position.Z);
Camera.Pitch = Client.Pitch;

4
TrueCraft.Core.Test/Physics/PhysicsEngineTest.cs
View File

@ -127,6 +127,10 @@ namespace TrueCraft.Core.Test.Physics
physics.Update(TimeSpan.FromSeconds(1));
Assert.AreEqual(4, entity.Position.Y);
physics.Update(TimeSpan.FromSeconds(5));
Assert.AreEqual(4, entity.Position.Y);
}
[Test]

6
TrueCraft.Core/Physics/PhysicsEngine.cs
View File

@ -155,7 +155,7 @@ namespace TrueCraft.Core.Physics
var extent = collisionExtent.Value;
double diff;
if (negative)
diff = entity.BoundingBox.Min.Y - extent;
diff = -(entity.BoundingBox.Min.Y - extent);
else
diff = extent - entity.BoundingBox.Max.Y;
entity.Velocity = new Vector3(entity.Velocity.X, diff, entity.Velocity.Z);
@ -244,7 +244,7 @@ namespace TrueCraft.Core.Physics
var extent = collisionExtent.Value;
double diff;
if (negative)
diff = entity.BoundingBox.Min.X - extent;
diff = -(entity.BoundingBox.Min.X - extent);
else
diff = extent - entity.BoundingBox.Max.X;
entity.Velocity = new Vector3(diff, entity.Velocity.Y, entity.Velocity.Z);
@ -333,7 +333,7 @@ namespace TrueCraft.Core.Physics
var extent = collisionExtent.Value;
double diff;
if (negative)
diff = entity.BoundingBox.Min.Z - extent;
diff = -(entity.BoundingBox.Min.Z - extent);
else
diff = extent - entity.BoundingBox.Max.Z;
entity.Velocity = new Vector3(entity.Velocity.X, entity.Velocity.Y, diff);