Code/net/minecraft/client/particle/FlyStraightTowardsParticle.java

package net.minecraft.client.particle;

import net.minecraft.client.multiplayer.ClientLevel;
import net.minecraft.core.particles.SimpleParticleType;
import net.minecraft.util.ARGB;
import net.minecraft.util.Mth;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class FlyStraightTowardsParticle extends TextureSheetParticle {
    private final double xStart;
    private final double yStart;
    private final double zStart;
    private final int startColor;
    private final int endColor;

    FlyStraightTowardsParticle(
        ClientLevel p_331392_,
        double p_328454_,
        double p_335936_,
        double p_334729_,
        double p_335747_,
        double p_333574_,
        double p_334122_,
        int p_328231_,
        int p_329614_
    ) {
        super(p_331392_, p_328454_, p_335936_, p_334729_);
        this.xd = p_335747_;
        this.yd = p_333574_;
        this.zd = p_334122_;
        this.xStart = p_328454_;
        this.yStart = p_335936_;
        this.zStart = p_334729_;
        this.xo = p_328454_ + p_335747_;
        this.yo = p_335936_ + p_333574_;
        this.zo = p_334729_ + p_334122_;
        this.x = this.xo;
        this.y = this.yo;
        this.z = this.zo;
        this.quadSize = 0.1F * (this.random.nextFloat() * 0.5F + 0.2F);
        this.hasPhysics = false;
        this.lifetime = (int)(Math.random() * 5.0) + 25;
        this.startColor = p_328231_;
        this.endColor = p_329614_;
    }

    @Override
    public ParticleRenderType getRenderType() {
        return ParticleRenderType.PARTICLE_SHEET_OPAQUE;
    }

    @Override
    public void move(double p_328657_, double p_332590_, double p_331282_) {
    }

    @Override
    public int getLightColor(float p_334272_) {
        return 240;
    }

    @Override
    public void tick() {
        this.xo = this.x;
        this.yo = this.y;
        this.zo = this.z;
        if (this.age++ >= this.lifetime) {
            this.remove();
        } else {
            float f = (float)this.age / this.lifetime;
            float f1 = 1.0F - f;
            this.x = this.xStart + this.xd * f1;
            this.y = this.yStart + this.yd * f1;
            this.z = this.zStart + this.zd * f1;
            int i = ARGB.lerp(f, this.startColor, this.endColor);
            this.setColor(ARGB.red(i) / 255.0F, ARGB.green(i) / 255.0F, ARGB.blue(i) / 255.0F);
            this.setAlpha(ARGB.alpha(i) / 255.0F);
        }
    }

    @OnlyIn(Dist.CLIENT)
    public static class OminousSpawnProvider implements ParticleProvider<SimpleParticleType> {
        private final SpriteSet sprite;

        public OminousSpawnProvider(SpriteSet p_327679_) {
            this.sprite = p_327679_;
        }

        public Particle createParticle(
            SimpleParticleType p_331905_,
            ClientLevel p_330985_,
            double p_334366_,
            double p_328334_,
            double p_330716_,
            double p_333567_,
            double p_329124_,
            double p_335449_
        ) {
            FlyStraightTowardsParticle flystraighttowardsparticle = new FlyStraightTowardsParticle(
                p_330985_, p_334366_, p_328334_, p_330716_, p_333567_, p_329124_, p_335449_, -12210434, -1
            );
            flystraighttowardsparticle.scale(Mth.randomBetween(p_330985_.getRandom(), 3.0F, 5.0F));
            flystraighttowardsparticle.pickSprite(this.sprite);
            return flystraighttowardsparticle;
        }
    }
}