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Use array cache to avoid reallocating states in Entity.MoveAndWallSlide()

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UnknownShadow200 2015-04-29 06:16:37 +10:00
parent 69a166e1f2
commit fa62592016
1 changed files with 17 additions and 4 deletions
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21
Physics/Entity.Physics.cs
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@ -51,6 +51,13 @@ namespace ClassicalSharp {
}
// TODO: test for corner cases, and refactor this.
static State[] stateCache = new State[0];
class StateComparer : IComparer<State> {
public int Compare( State x, State y ) {
return x.t.CompareTo( y.t );
}
}
static StateComparer comparer = new StateComparer();
protected void MoveAndWallSlide() {
Vector3 vel = Velocity;
if( vel == Vector3.Zero ) return;
@ -78,7 +85,12 @@ namespace ClassicalSharp {
int maxY = Utils.Floor( entityExtentBB.Max.Y );
int maxZ = Utils.Floor( entityExtentBB.Max.Z );
List<State> collisions = new List<State>();
int elements = ( maxX + 1 - minX ) * ( maxY + 1 - minY ) * ( maxZ + 1 - minZ );
if( elements > stateCache.Length ) {
stateCache = new State[elements];
}
int count = 0;
for( int x = minX; x <= maxX; x++ ) {
for( int y = minY; y <= maxY; y++ ) {
for( int z = minZ; z <= maxZ; z++ ) {
@ -91,16 +103,17 @@ namespace ClassicalSharp {
CalcTime( ref vel, ref entityBB, ref blockBB, out tx, out ty, out tz );
if( tx > 1 || ty > 1 || tz > 1 ) continue;
float t = (float)Math.Sqrt( tx * tx + ty * ty + tz * tz );
collisions.Add( new State( blockBB, blockId, t ) );
stateCache[count++] = new State( blockBB, blockId, t );
}
}
}
bool wasOnGround = onGround;
onGround = false;
collisions.Sort( (a, b) => a.t.CompareTo( b.t ) );
Array.Sort( stateCache, 0, count, comparer );
foreach( State state in collisions ) {
for( int i = 0; i < count; i++ ) {
State state = stateCache[i];
BoundingBox blockBB = state.BlockBB;
if( !entityExtentBB.Intersects( blockBB ) ) continue;