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

package net.minecraft.client.particle;

import javax.annotation.Nullable;
import net.minecraft.client.Minecraft;
import net.minecraft.client.multiplayer.ClientLevel;
import net.minecraft.client.renderer.LevelRenderer;
import net.minecraft.core.BlockPos;
import net.minecraft.core.particles.BlockParticleOption;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class TerrainParticle extends TextureSheetParticle {
    private final BlockPos pos;
    private final float uo;
    private final float vo;

    public TerrainParticle(
        ClientLevel p_108282_, double p_108283_, double p_108284_, double p_108285_, double p_108286_, double p_108287_, double p_108288_, BlockState p_108289_
    ) {
        this(p_108282_, p_108283_, p_108284_, p_108285_, p_108286_, p_108287_, p_108288_, p_108289_, BlockPos.containing(p_108283_, p_108284_, p_108285_));
    }

    public TerrainParticle(
        ClientLevel p_172451_,
        double p_172452_,
        double p_172453_,
        double p_172454_,
        double p_172455_,
        double p_172456_,
        double p_172457_,
        BlockState p_172458_,
        BlockPos p_172459_
    ) {
        super(p_172451_, p_172452_, p_172453_, p_172454_, p_172455_, p_172456_, p_172457_);
        this.pos = p_172459_;
        this.setSprite(Minecraft.getInstance().getBlockRenderer().getBlockModelShaper().getParticleIcon(p_172458_));
        this.gravity = 1.0F;
        this.rCol = 0.6F;
        this.gCol = 0.6F;
        this.bCol = 0.6F;
        if (!p_172458_.is(Blocks.GRASS_BLOCK)) {
            int i = Minecraft.getInstance().getBlockColors().getColor(p_172458_, p_172451_, p_172459_, 0);
            this.rCol *= (i >> 16 & 0xFF) / 255.0F;
            this.gCol *= (i >> 8 & 0xFF) / 255.0F;
            this.bCol *= (i & 0xFF) / 255.0F;
        }

        this.quadSize /= 2.0F;
        this.uo = this.random.nextFloat() * 3.0F;
        this.vo = this.random.nextFloat() * 3.0F;
    }

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

    @Override
    protected float getU0() {
        return this.sprite.getU((this.uo + 1.0F) / 4.0F);
    }

    @Override
    protected float getU1() {
        return this.sprite.getU(this.uo / 4.0F);
    }

    @Override
    protected float getV0() {
        return this.sprite.getV(this.vo / 4.0F);
    }

    @Override
    protected float getV1() {
        return this.sprite.getV((this.vo + 1.0F) / 4.0F);
    }

    @Override
    public int getLightColor(float p_108291_) {
        int i = super.getLightColor(p_108291_);
        return i == 0 && this.level.hasChunkAt(this.pos) ? LevelRenderer.getLightColor(this.level, this.pos) : i;
    }

    @Nullable
    static TerrainParticle createTerrainParticle(
        BlockParticleOption p_331600_,
        ClientLevel p_334810_,
        double p_328897_,
        double p_329583_,
        double p_331123_,
        double p_333546_,
        double p_335782_,
        double p_335068_
    ) {
        BlockState blockstate = p_331600_.getState();
        return !blockstate.isAir() && !blockstate.is(Blocks.MOVING_PISTON) && blockstate.shouldSpawnTerrainParticles()
            ? new TerrainParticle(p_334810_, p_328897_, p_329583_, p_331123_, p_333546_, p_335782_, p_335068_, blockstate)
            : null;
    }

    @OnlyIn(Dist.CLIENT)
    public static class CrumblingProvider implements ParticleProvider<BlockParticleOption> {
        @Nullable
        public Particle createParticle(
            BlockParticleOption p_367319_,
            ClientLevel p_364090_,
            double p_370008_,
            double p_368534_,
            double p_364367_,
            double p_367489_,
            double p_363938_,
            double p_362714_
        ) {
            Particle particle = TerrainParticle.createTerrainParticle(p_367319_, p_364090_, p_370008_, p_368534_, p_364367_, p_367489_, p_363938_, p_362714_);
            if (particle != null) {
                particle.setParticleSpeed(0.0, 0.0, 0.0);
                particle.setLifetime(p_364090_.random.nextInt(10) + 1);
            }

            return particle;
        }
    }

    @OnlyIn(Dist.CLIENT)
    public static class DustPillarProvider implements ParticleProvider<BlockParticleOption> {
        @Nullable
        public Particle createParticle(
            BlockParticleOption p_331644_,
            ClientLevel p_335147_,
            double p_334048_,
            double p_329502_,
            double p_331778_,
            double p_332962_,
            double p_334493_,
            double p_329453_
        ) {
            Particle particle = TerrainParticle.createTerrainParticle(p_331644_, p_335147_, p_334048_, p_329502_, p_331778_, p_332962_, p_334493_, p_329453_);
            if (particle != null) {
                particle.setParticleSpeed(
                    p_335147_.random.nextGaussian() / 30.0, p_334493_ + p_335147_.random.nextGaussian() / 2.0, p_335147_.random.nextGaussian() / 30.0
                );
                particle.setLifetime(p_335147_.random.nextInt(20) + 20);
            }

            return particle;
        }
    }

    @OnlyIn(Dist.CLIENT)
    public static class Provider implements ParticleProvider<BlockParticleOption> {
        @Nullable
        public Particle createParticle(
            BlockParticleOption p_108304_,
            ClientLevel p_108305_,
            double p_108306_,
            double p_108307_,
            double p_108308_,
            double p_108309_,
            double p_108310_,
            double p_108311_
        ) {
            return TerrainParticle.createTerrainParticle(p_108304_, p_108305_, p_108306_, p_108307_, p_108308_, p_108309_, p_108310_, p_108311_);
        }
    }
}