Add Fog Occlusion for particles

common/src/main/java/net/caffeinemc/mods/sodium/mixin/features/render/particle/QuadParticleGroupMixin.java

@@ -0,0 +1,46 @@
+package net.caffeinemc.mods.sodium.mixin.features.render.particle;
+
+import com.mojang.blaze3d.systems.RenderSystem;
+import net.caffeinemc.mods.sodium.client.SodiumClientMod;
+import net.caffeinemc.mods.sodium.client.util.FogStorage;
+import net.minecraft.client.Camera;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.particle.*;
+import net.minecraft.client.renderer.state.QuadParticleRenderState;
+import net.minecraft.util.Mth;
+import net.minecraft.world.phys.Vec3;
+import org.spongepowered.asm.mixin.*;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(QuadParticleGroup.class)
+public abstract class QuadParticleGroupMixin {
+
+    @Redirect(method = "extractRenderState",at = @At(value = "INVOKE", target = "Lnet/minecraft/client/particle/SingleQuadParticle;extract(Lnet/minecraft/client/renderer/state/QuadParticleRenderState;Lnet/minecraft/client/Camera;F)V"))
+    public void sodium$checkFogOcclusion(SingleQuadParticle instance, QuadParticleRenderState particleTypeRenderState, Camera camera, float f){
+        if(SodiumClientMod.options().performance.useFogOcclusion ? sodium$isParticleFogOccluded(camera.position(),instance.getBoundingBox().getMaxPosition()) : true){
+            instance.extract(particleTypeRenderState,camera,f);
+        }
+    }
+
+    @Unique
+    public boolean sodium$isParticleFogOccluded(Vec3 pointA, Vec3 pointB){
+        double dx = pointA.x - pointB.x;
+        double dz = pointA.z - pointB.z;
+        double distance = (dx * dx + dz * dz);
+
+        var shaderFog = ((FogStorage) Minecraft.getInstance().gameRenderer).sodium$getFogParameters();
+        double shaderFogDistance = shaderFog.environmentalEnd();
+
+        var renderDistance = Minecraft.getInstance().gameRenderer.getRenderDistance();
+
+        if(!Mth.equal(shaderFog.alpha(),1.0f)){
+            return false;
+        }
+
+        var fogDist = Math.min(renderDistance,shaderFogDistance);
+
+        return distance < fogDist * fogDist;
+    }
+
+}

common/src/main/resources/sodium-common.accesswidener

@@ -12,6 +12,9 @@ accessible class net/minecraft/world/level/biome/Biome$ClimateSettings
 accessible method net/minecraft/client/renderer/SectionBufferBuilderPool <init> (Ljava/util/List;)V
 accessible class net/minecraft/client/gui/font/glyphs/BakedSheetGlyph$EffectInstance
 accessible field com/mojang/blaze3d/vertex/PoseStack$Pose trustedNormals Z
+accessible field net/minecraft/client/particle/Particle x D
+accessible field net/minecraft/client/particle/Particle y D
+accessible field net/minecraft/client/particle/Particle z D
 accessible class net/minecraft/client/renderer/CloudRenderer$RelativeCameraPos
 
 accessible field net/minecraft/world/level/GrassColor pixels [I

common/src/main/resources/sodium-common.mixins.json

@@ -58,6 +58,7 @@
     "features.render.immediate.matrix_stack.VertexConsumerMixin",
     "features.render.model.ItemBlockRenderTypesMixin",
     "features.render.model.item.ItemRendererMixin",
+    "features.render.particle.QuadParticleGroupMixin",
     "features.render.particle.QuadParticleRenderStateMixin",
     "features.render.world.sky.LevelRendererMixin",
     "features.render.world.clouds.CloudRendererMixin",