minecraft-src/net/minecraft/world/entity/InterpolationHandler.java
2025-07-04 03:45:38 +03:00

140 lines
4.4 KiB
Java

package net.minecraft.world.entity;
import java.util.function.Consumer;
import net.minecraft.util.Mth;
import net.minecraft.world.phys.Vec2;
import net.minecraft.world.phys.Vec3;
import org.jetbrains.annotations.Nullable;
public class InterpolationHandler {
public static final int DEFAULT_INTERPOLATION_STEPS = 3;
private final Entity entity;
private int interpolationSteps;
private final InterpolationHandler.InterpolationData interpolationData = new InterpolationHandler.InterpolationData(0, Vec3.ZERO, 0.0F, 0.0F);
@Nullable
private Vec3 previousTickPosition;
@Nullable
private Vec2 previousTickRot;
@Nullable
private final Consumer<InterpolationHandler> onInterpolationStart;
public InterpolationHandler(Entity entity) {
this(entity, 3, null);
}
public InterpolationHandler(Entity entity, int interpolationSteps) {
this(entity, interpolationSteps, null);
}
public InterpolationHandler(Entity entity, @Nullable Consumer<InterpolationHandler> onInterpolationStart) {
this(entity, 3, onInterpolationStart);
}
public InterpolationHandler(Entity entity, int interpolationSteps, @Nullable Consumer<InterpolationHandler> onInterpolationStart) {
this.interpolationSteps = interpolationSteps;
this.entity = entity;
this.onInterpolationStart = onInterpolationStart;
}
public Vec3 position() {
return this.interpolationData.steps > 0 ? this.interpolationData.position : this.entity.position();
}
public float yRot() {
return this.interpolationData.steps > 0 ? this.interpolationData.yRot : this.entity.getYRot();
}
public float xRot() {
return this.interpolationData.steps > 0 ? this.interpolationData.xRot : this.entity.getXRot();
}
public void interpolateTo(Vec3 pos, float yRot, float xRot) {
if (this.interpolationSteps == 0) {
this.entity.snapTo(pos, yRot, xRot);
this.cancel();
} else {
this.interpolationData.steps = this.interpolationSteps;
this.interpolationData.position = pos;
this.interpolationData.yRot = yRot;
this.interpolationData.xRot = xRot;
this.previousTickPosition = this.entity.position();
this.previousTickRot = new Vec2(this.entity.getXRot(), this.entity.getYRot());
if (this.onInterpolationStart != null) {
this.onInterpolationStart.accept(this);
}
}
}
public boolean hasActiveInterpolation() {
return this.interpolationData.steps > 0;
}
public void setInterpolationLength(int interpolationLength) {
this.interpolationSteps = interpolationLength;
}
public void interpolate() {
if (!this.hasActiveInterpolation()) {
this.cancel();
} else {
double d = 1.0 / this.interpolationData.steps;
if (this.previousTickPosition != null) {
Vec3 vec3 = this.entity.position().subtract(this.previousTickPosition);
if (this.entity.level().noCollision(this.entity, this.entity.makeBoundingBox().move(this.interpolationData.position.add(vec3)))) {
this.interpolationData.addDelta(vec3);
}
}
if (this.previousTickRot != null) {
float f = this.entity.getYRot() - this.previousTickRot.y;
float g = this.entity.getXRot() - this.previousTickRot.x;
this.interpolationData.addRotation(f, g);
}
double e = Mth.lerp(d, this.entity.getX(), this.interpolationData.position.x);
double h = Mth.lerp(d, this.entity.getY(), this.interpolationData.position.y);
double i = Mth.lerp(d, this.entity.getZ(), this.interpolationData.position.z);
Vec3 vec32 = new Vec3(e, h, i);
float j = (float)Mth.rotLerp(d, (double)this.entity.getYRot(), (double)this.interpolationData.yRot);
float k = (float)Mth.lerp(d, (double)this.entity.getXRot(), (double)this.interpolationData.xRot);
this.entity.setPos(vec32);
this.entity.setRot(j, k);
this.interpolationData.decrease();
this.previousTickPosition = vec32;
this.previousTickRot = new Vec2(this.entity.getXRot(), this.entity.getYRot());
}
}
public void cancel() {
this.interpolationData.steps = 0;
this.previousTickPosition = null;
this.previousTickRot = null;
}
static class InterpolationData {
protected int steps;
Vec3 position;
float yRot;
float xRot;
InterpolationData(int steps, Vec3 position, float yRot, float xRot) {
this.steps = steps;
this.position = position;
this.yRot = yRot;
this.xRot = xRot;
}
public void decrease() {
this.steps--;
}
public void addDelta(Vec3 delta) {
this.position = this.position.add(delta);
}
public void addRotation(float yRot, float xRot) {
this.yRot += yRot;
this.xRot += xRot;
}
}
}