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Fix inaccuracy in entity position tracking
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67 changes: 67 additions & 0 deletions
67
src/main/java/ac/grim/grimac/utils/data/TrackedPosition.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package ac.grim.grimac.utils.data; | ||
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| import ac.grim.grimac.player.GrimPlayer; | ||
| import com.github.retrooper.packetevents.protocol.player.ClientVersion; | ||
| import com.github.retrooper.packetevents.util.Vector3d; | ||
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| public final class TrackedPosition { | ||
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| private static final double MODERN_COORDINATE_SCALE = 4096.0; | ||
| private static final double LEGACY_COORDINATE_SCALE = 32.0; | ||
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| private final double scale; | ||
| private Vector3d pos = new Vector3d(); | ||
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| public TrackedPosition() { | ||
| // this.scale = player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9) ? MODERN_COORDINATE_SCALE : LEGACY_COORDINATE_SCALE; | ||
| this.scale = MODERN_COORDINATE_SCALE; | ||
| } | ||
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| public double getScale() { | ||
| return scale; | ||
| } | ||
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| public static long pack(double value, double scale) { | ||
| return Math.round(value * scale); | ||
| } | ||
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| public static double packLegacy(double value, double scale) { | ||
| return Math.floor(value * scale); | ||
| } | ||
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| private double unpack(long value) { | ||
| return (double) value / scale; | ||
| } | ||
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| private double unpackLegacy(double value) { | ||
| return value / scale; | ||
| } | ||
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| public Vector3d getPos() { | ||
| return pos; | ||
| } | ||
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| // Method since 1.16. | ||
| public Vector3d withDelta(long x, long y, long z) { | ||
| if (x == 0L && y == 0L && z == 0L) { | ||
| return this.pos; | ||
| } | ||
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| double d = x == 0L ? this.pos.x : unpack(pack(this.pos.x, scale) + x); | ||
| double e = y == 0L ? this.pos.y : unpack(pack(this.pos.y, scale) + y); | ||
| double f = z == 0L ? this.pos.z : unpack(pack(this.pos.z, scale) + z); | ||
| return new Vector3d(d, e, f); | ||
| } | ||
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| // In 1.16-, this was different. | ||
| public Vector3d withDeltaLegacy(double x, double y, double z) { | ||
| double d = unpackLegacy(packLegacy(this.pos.x, scale) + x); | ||
| double e = unpackLegacy(packLegacy(this.pos.y, scale) + y); | ||
| double f = unpackLegacy(packLegacy(this.pos.z, scale) + z); | ||
| return new Vector3d(d, e, f); | ||
| } | ||
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| public void setPos(Vector3d pos) { | ||
| this.pos = pos; | ||
| } | ||
| } |
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