Added wind trail particles

src/main/java/com/minelittlepony/unicopia/block/WeatherVaneBlock.java

@@ -3,6 +3,8 @@ package com.minelittlepony.unicopia.block;
 import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.USounds;
+import com.minelittlepony.unicopia.particle.TargetBoundParticleEffect;
+import com.minelittlepony.unicopia.particle.UParticles;
 import com.minelittlepony.unicopia.server.world.WeatherConditions;
 
 import net.minecraft.block.*;
@@ -51,6 +53,9 @@ public class WeatherVaneBlock extends BlockWithEntity {
 
         private float clientAngle;
         private float prevAngle;
+        private float lastAngle;
+
+        private Vec3d airflow = Vec3d.ZERO;
 
         public WeatherVane(BlockPos pos, BlockState state) {
             super(UBlockEntities.WEATHER_VANE, pos, state);
@@ -63,11 +68,14 @@ public class WeatherVaneBlock extends BlockWithEntity {
         @Override
         public void readNbt(NbtCompound nbt) {
             angle = nbt.getFloat("angle");
+            airflow = new Vec3d(nbt.getDouble("windX"), 0, nbt.getDouble("windZ"));
         }
 
         @Override
         protected void writeNbt(NbtCompound nbt) {
             nbt.putFloat("angle", angle);
+            nbt.putDouble("windX", airflow.x);
+            nbt.putDouble("windZ", airflow.z);
         }
 
         @Override
@@ -82,23 +90,26 @@ public class WeatherVaneBlock extends BlockWithEntity {
 
         public static void serverTick(World world, BlockPos pos, BlockState state, WeatherVane entity) {
             Vec3d airflow = WeatherConditions.get(world).getWindDirection();
-            float angle = (float)Math.atan2(airflow.x, airflow.z) + MathHelper.PI;
-            if (Math.signum(entity.angle) != Math.signum(angle)) {
-                angle = MathHelper.PI - angle;
-            }
-            angle %= MathHelper.PI;
+            float angle = (WeatherConditions.get(world).getWindYaw() % MathHelper.PI);
 
+            entity.lastAngle = entity.prevAngle;
+            entity.prevAngle = entity.angle;
             if (angle != entity.angle) {
                 entity.angle = angle;
+
+                entity.airflow = airflow;
                 entity.markDirty();
-                if (world instanceof ServerWorld serverWorld) {
-                    serverWorld.getChunkManager().markForUpdate(pos);
+                if (world instanceof ServerWorld sw) {
+                    sw.getChunkManager().markForUpdate(pos);
                 }
 
+                if (entity.lastAngle == entity.prevAngle) {
                     world.playSound(null, pos.getX(), pos.getY(), pos.getZ(), USounds.BLOCK_WEATHER_VANE_ROTATE, SoundCategory.BLOCKS, 1, 0.5F + (float)world.random.nextGaussian());
                 }
             }
 
+        }
+
         public static void clientTick(World world, BlockPos pos, BlockState state, WeatherVane entity) {
             entity.prevAngle = entity.clientAngle;
 
@@ -111,6 +122,18 @@ public class WeatherVaneBlock extends BlockWithEntity {
             } else if (entity.clientAngle > angle) {
                 entity.clientAngle -= step;
             }
+
+            if (world.random.nextInt(3) == 0) {
+                float radius = 10;
+                for (int i = 0; i < 5; i++) {
+                    world.addImportantParticle(new TargetBoundParticleEffect(UParticles.WIND, null),
+                            world.getRandom().nextTriangular(pos.getX(), radius),
+                            world.getRandom().nextTriangular(pos.getY(), radius),
+                            world.getRandom().nextTriangular(pos.getZ(), radius),
+                            entity.airflow.x / 10F, 0, entity.airflow.z / 10F
+                    );
+                }
+            }
         }
     }
 }

src/main/java/com/minelittlepony/unicopia/client/URenderers.java

@@ -22,6 +22,7 @@ import com.minelittlepony.unicopia.client.particle.RainbowTrailParticle;
 import com.minelittlepony.unicopia.client.particle.RaindropsParticle;
 import com.minelittlepony.unicopia.client.particle.ShockwaveParticle;
 import com.minelittlepony.unicopia.client.particle.SphereParticle;
+import com.minelittlepony.unicopia.client.particle.WindParticle;
 import com.minelittlepony.unicopia.client.render.*;
 import com.minelittlepony.unicopia.client.render.entity.*;
 import com.minelittlepony.unicopia.client.render.shader.UShaders;
@@ -81,6 +82,7 @@ public interface URenderers {
         ParticleFactoryRegistry.getInstance().register(UParticles.FOOTPRINT, createFactory(FootprintParticle::new));
         ParticleFactoryRegistry.getInstance().register(UParticles.RAINBOOM_RING, RainboomParticle::new);
         ParticleFactoryRegistry.getInstance().register(UParticles.RAINBOOM_TRAIL, RainbowTrailParticle::new);
+        ParticleFactoryRegistry.getInstance().register(UParticles.WIND, WindParticle::new);
         ParticleFactoryRegistry.getInstance().register(UParticles.SHOCKWAVE, ShockwaveParticle::new);
         ParticleFactoryRegistry.getInstance().register(UParticles.SPHERE, SphereParticle::new);
         ParticleFactoryRegistry.getInstance().register(UParticles.DISK, DiskParticle::new);

src/main/java/com/minelittlepony/unicopia/client/particle/RainbowTrailParticle.java

@@ -29,7 +29,7 @@ public class RainbowTrailParticle extends AbstractBillboardParticle {
 
     public RainbowTrailParticle(TargetBoundParticleEffect effect, ClientWorld world, double x, double y, double z, double velocityX, double velocityY, double velocityZ) {
         super(world, x, y, z, velocityX, velocityY, velocityZ);
-        trail = new Trail(new Vec3d(x, y, z));
+        trail = new Trail(new Vec3d(x, y, z), 1);
         setMaxAge(300);
         this.velocityX = velocityX;
         this.velocityY = velocityY;

src/main/java/com/minelittlepony/unicopia/client/particle/WindParticle.java

@@ -0,0 +1,103 @@
+package com.minelittlepony.unicopia.client.particle;
+
+import java.util.List;
+import org.jetbrains.annotations.Nullable;
+
+import com.minelittlepony.unicopia.Unicopia;
+import com.minelittlepony.unicopia.client.render.bezier.BezierSegment;
+import com.minelittlepony.unicopia.client.render.bezier.Trail;
+import com.minelittlepony.unicopia.particle.TargetBoundParticleEffect;
+
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.BufferBuilder;
+import net.minecraft.client.render.Tessellator;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.entity.Entity;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.math.MathHelper;
+import net.minecraft.util.math.Vec3d;
+
+public class WindParticle extends AbstractBillboardParticle {
+    private static final Identifier TEXTURE = Unicopia.id("textures/particle/wind.png");
+
+    private final Trail trail;
+
+    @Nullable
+    private Entity target;
+
+    private int attachmentTicks;
+
+    private final Vec3d offset;
+    private final boolean passive;
+
+    public WindParticle(TargetBoundParticleEffect effect, ClientWorld world, double x, double y, double z, double velocityX, double velocityY, double velocityZ) {
+        super(world, x, y, z, velocityX, velocityY, velocityZ);
+        trail = new Trail(new Vec3d(x, y, z), 0.02F);
+        setMaxAge(300);
+        this.alpha = 0.15F;
+        this.velocityX = velocityX;
+        this.velocityY = velocityY;
+        this.velocityZ = velocityZ;
+        this.attachmentTicks = (int)world.random.nextTriangular(15, 12);
+        this.passive = effect.getTargetId() <= 0;
+
+        if (effect.getTargetId() > 0) {
+            this.target = world.getEntityById(effect.getTargetId());
+        }
+        offset = target == null ? Vec3d.ZERO : new Vec3d(x, y, z).subtract(target.getPos());
+    }
+
+    @Override
+    protected Identifier getTexture() {
+        return TEXTURE;
+    }
+
+    @Override
+    public boolean isAlive() {
+        return age < getMaxAge() && (!dead || !trail.getSegments().isEmpty());
+    }
+
+    @Override
+    protected void renderQuads(Tessellator te, BufferBuilder buffer, float x, float y, float z, float tickDelta) {
+        float alpha = this.alpha * (1 - (float)age / maxAge);
+
+        List<Trail.Segment> segments = trail.getSegments();
+
+        for (int i = 0; i < segments.size() - 1; i++) {
+            BezierSegment corners = segments.get(i).getPlane(segments.get(i + 1));
+            float scale = getScale(tickDelta);
+
+            corners.forEachCorner(corner -> {
+                corner.position().mul(scale).add(x, y, z);
+            });
+
+            renderQuad(te, buffer, corners.corners(), segments.get(i).getAlpha() * alpha, tickDelta);
+        }
+    }
+
+    @Override
+    public void tick() {
+        super.tick();
+
+        float animationFrame = age + MinecraftClient.getInstance().getTickDelta();
+
+        float sin = MathHelper.sin(animationFrame / 5F) * 0.1F;
+        float cos = MathHelper.cos(animationFrame / 10F) * 0.2F;
+
+        if (passive) {
+            trail.update(new Vec3d(x + cos, y + sin, z - cos));
+        } else {
+            if (target != null && target.isAlive()) {
+                trail.update(target.getPos().add(offset).add(cos, sin, -cos));
+
+                if (attachmentTicks > 0 && --attachmentTicks <= 0) {
+                    target = null;
+                }
+            }
+        }
+
+        if (trail.tick()) {
+            markDead();
+        }
+    }
+}

src/main/java/com/minelittlepony/unicopia/client/render/bezier/Trail.java

@@ -12,8 +12,11 @@ public class Trail {
 
     public final Vec3d pos;
 
-    public Trail(Vec3d pos) {
+    private final float height;
+
+    public Trail(Vec3d pos, float height) {
         this.pos = pos;
+        this.height = height;
         segments.add(new Segment(pos));
     }
 
@@ -61,7 +64,7 @@ public class Trail {
         }
 
         public BezierSegment getPlane(Segment to) {
-            return new BezierSegment(offset, to.offset, 1);
+            return new BezierSegment(offset, to.offset, height);
         }
     }
 }

src/main/java/com/minelittlepony/unicopia/entity/player/PlayerPhysics.java

@@ -649,6 +649,14 @@ public class PlayerPhysics extends EntityPhysics<PlayerEntity> implements Tickab
         velocity.x += - forward * MathHelper.sin(entity.getYaw() * 0.017453292F);
         velocity.z += forward * MathHelper.cos(entity.getYaw() * 0.017453292F);
 
+        if (pony.isClient()) {
+            float effectChance = 1F - (float)(MathHelper.clamp(velocity.horizontalLengthSquared(), 0, 1));
+
+            if (entity.getWorld().random.nextInt(1 + (int)(120 * effectChance)) == 0) {
+                pony.spawnParticles(new TargetBoundParticleEffect(UParticles.WIND, pony.asEntity()), 3);
+            }
+        }
+
         if (entity.getWorld().hasRain(entity.getBlockPos())) {
             applyTurbulance(velocity);
         } else {
@@ -820,6 +828,8 @@ public class PlayerPhysics extends EntityPhysics<PlayerEntity> implements Tickab
 
         pony.updateVelocity();
 
+        pony.spawnParticles(new TargetBoundParticleEffect(UParticles.WIND, pony.asEntity()), 4);
+
         if (isFlying()) {
             playSound(USounds.ENTITY_PLAYER_PEGASUS_DASH, 1, 1);
         } else {

src/main/java/com/minelittlepony/unicopia/particle/TargetBoundParticleEffect.java

@@ -3,6 +3,8 @@ package com.minelittlepony.unicopia.particle;
 
 import java.util.Locale;
 
+import org.jetbrains.annotations.Nullable;
+
 import com.mojang.brigadier.StringReader;
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
 
@@ -29,9 +31,9 @@ public class TargetBoundParticleEffect implements ParticleEffect {
         this.targetId = buf.readInt();
     }
 
-    public TargetBoundParticleEffect(ParticleType<TargetBoundParticleEffect> type, Entity target) {
+    public TargetBoundParticleEffect(ParticleType<TargetBoundParticleEffect> type, @Nullable Entity target) {
         this.type = type;
-        this.targetId = target.getId();
+        this.targetId = target == null ? -1 : target.getId();
     }
 
     public int getTargetId() {

src/main/java/com/minelittlepony/unicopia/particle/UParticles.java

@@ -19,6 +19,7 @@ public interface UParticles {
 
     ParticleType<OrientedBillboardParticleEffect> RAINBOOM_RING = register("rainboom_ring", FabricParticleTypes.complex(OrientedBillboardParticleEffect.FACTORY));
     ParticleType<TargetBoundParticleEffect> RAINBOOM_TRAIL = register("rainboom_trail", FabricParticleTypes.complex(TargetBoundParticleEffect.FACTORY));
+    ParticleType<TargetBoundParticleEffect> WIND = register("wind", FabricParticleTypes.complex(TargetBoundParticleEffect.FACTORY));
 
     DefaultParticleType RAIN_DROPS = register("rain_drops", FabricParticleTypes.simple());
 

src/main/java/com/minelittlepony/unicopia/server/world/WeatherConditions.java

@@ -114,8 +114,12 @@ public class WeatherConditions extends PersistentState implements Tickable {
         return MathHelper.lerp(interpolation / (float)maxInterpolation, prevWindYaw, windYaw);
     }
 
+    public int getWindInterpolation() {
+        return interpolation;
+    }
+
     public Vec3d getWindDirection() {
-        return Vec3d.fromPolar(0, windYaw).normalize();
+        return Vec3d.fromPolar(0, getWindYaw()).normalize();
     }
 
     @Override

src/main/resources/assets/unicopia/particles/wind.json

@@ -0,0 +1,2 @@
+{
+}