Implement a renderer for the back hole

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/PlaceableSpell.java

@@ -106,12 +106,12 @@ public class PlaceableSpell extends AbstractDelegatingSpell implements OrientedS
                     setDead();
                     return false;
                 }
-            } else {
+            }
+
             prevAge = age;
             if (age < 25) {
                 age++;
             }
-            }
 
             return super.tick(source, Situation.GROUND);
         }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/AttractiveSpell.java

@@ -7,7 +7,6 @@ import com.minelittlepony.unicopia.entity.EntityReference;
 import com.minelittlepony.unicopia.entity.Living;
 import com.minelittlepony.unicopia.entity.damage.UDamageTypes;
 import com.minelittlepony.unicopia.particle.FollowingParticleEffect;
-import com.minelittlepony.unicopia.particle.MagicParticleEffect;
 import com.minelittlepony.unicopia.particle.UParticles;
 import com.minelittlepony.unicopia.projectile.MagicProjectileEntity;
 import com.minelittlepony.unicopia.projectile.ProjectileDelegate;
@@ -16,6 +15,7 @@ import com.minelittlepony.unicopia.util.shape.Sphere;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.ItemEntity;
 import net.minecraft.nbt.NbtCompound;
+import net.minecraft.particle.ParticleTypes;
 import net.minecraft.util.hit.EntityHitResult;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
@@ -60,12 +60,12 @@ public class AttractiveSpell extends ShieldSpell implements HomingSpell, TimedSp
 
     @Override
     public void generateParticles(Caster<?> source) {
-        double range = getDrawDropOffRange(source) + 10;
+        double range = getDrawDropOffRange(source);
 
         source.spawnParticles(getOrigin(source), new Sphere(false, range), 7, p -> {
             source.addParticle(
                     new FollowingParticleEffect(UParticles.HEALTH_DRAIN, source.asEntity(), 0.4F)
-                        .withChild(new MagicParticleEffect(getType().getColor())),
+                        .withChild(ParticleTypes.AMBIENT_ENTITY_EFFECT),
                     p,
                     Vec3d.ZERO
             );

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/DarkVortexSpell.java

@@ -11,9 +11,10 @@ import com.minelittlepony.unicopia.ability.magic.spell.Spell;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.damage.UDamageTypes;
+import com.minelittlepony.unicopia.particle.FollowingParticleEffect;
 import com.minelittlepony.unicopia.particle.LightningBoltParticleEffect;
-import com.minelittlepony.unicopia.particle.ParticleHandle;
 import com.minelittlepony.unicopia.particle.ParticleUtils;
+import com.minelittlepony.unicopia.particle.UParticles;
 import com.minelittlepony.unicopia.projectile.MagicProjectileEntity;
 import com.minelittlepony.unicopia.projectile.ProjectileDelegate;
 import com.minelittlepony.unicopia.util.shape.Sphere;
@@ -49,9 +50,6 @@ public class DarkVortexSpell extends AttractiveSpell implements ProjectileDelega
     private int age = 0;
     private float accumulatedMass = 0;
 
-    @Deprecated
-    protected final ParticleHandle particlEffect = new ParticleHandle();
-
     protected DarkVortexSpell(CustomisedSpellType<?> type) {
         super(type);
     }
@@ -114,21 +112,17 @@ public class DarkVortexSpell extends AttractiveSpell implements ProjectileDelega
     public void generateParticles(Caster<?> source) {
         super.generateParticles(source);
 
-        /*float radius = (float)getEventHorizonRadius();
+        if (getEventHorizonRadius() > 3) {
-
+            double range = getDrawDropOffRange(source);
-        particlEffect.update(getUuid(), source, spawner -> {
+            source.spawnParticles(getOrigin(source), new Sphere(false, range), 17, p -> {
-            spawner.addParticle(new SphereParticleEffect(UParticles.SPHERE, 0x000000, 0.99F, radius, SPHERE_OFFSET), source.getOriginVector(), Vec3d.ZERO);
+                source.addParticle(
-        }).ifPresent(p -> {
+                        new FollowingParticleEffect(UParticles.HEALTH_DRAIN, source.asEntity(), 0.4F)
-            p.setAttribute(Attachment.ATTR_RADIUS, radius);
+                            .withChild(ParticleTypes.CAMPFIRE_SIGNAL_SMOKE),
-            p.setAttribute(Attachment.ATTR_OPACITY, 2F);
+                        p,
+                        Vec3d.ZERO
+                );
             });
-        particlEffect.update(getUuid(), "_ring", source, spawner -> {
+        }
-            spawner.addParticle(new SphereParticleEffect(UParticles.DISK, 0xAAAAAA, 0.4F, radius + 1, SPHERE_OFFSET), getOrigin(source), Vec3d.ZERO);
-        }).ifPresent(p -> {
-            p.setAttribute(Attachment.ATTR_RADIUS, radius * 0F);
-        });*/
-
-        source.spawnParticles(ParticleTypes.SMOKE, 3);
     }
 
     @Override
@@ -178,7 +172,7 @@ public class DarkVortexSpell extends AttractiveSpell implements ProjectileDelega
     // 3. force reaches 0 at distance of drawDropOffRange
 
     public double getEventHorizonRadius() {
-        return Math.sqrt(Math.max(0.001, getMass() - 12));
+        return Math.sqrt(Math.max(0.001, getMass() / 3F));
     }
 
     private double getAttractiveForce(Caster<?> source, Entity target) {
@@ -186,8 +180,8 @@ public class DarkVortexSpell extends AttractiveSpell implements ProjectileDelega
     }
 
     private double getMass() {
-        float pulse = (float)Math.sin(age * 8) / 1F;
+        float pulse = (float)Math.sin(age * 8) / 160F;
-        return 10 + Math.min(15, Math.min(0.5F + pulse, (float)Math.exp(age) / 8F - 90) + accumulatedMass / 10F) + pulse;
+        return Math.min(15, Math.min(0.5F, (float)Math.exp(age) / 8F - 90) + accumulatedMass / 10F) + pulse;
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/client/render/spell/DarkVortexSpellRenderer.java

@@ -0,0 +1,99 @@
+package com.minelittlepony.unicopia.client.render.spell;
+
+import org.joml.Vector3f;
+import org.joml.Vector4f;
+
+import com.minelittlepony.unicopia.ability.magic.Caster;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.DarkVortexSpell;
+import com.minelittlepony.unicopia.client.render.RenderLayers;
+import com.minelittlepony.unicopia.client.render.RenderUtil;
+import com.minelittlepony.unicopia.client.render.model.SphereModel;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.RenderLayer;
+import net.minecraft.client.render.VertexConsumer;
+import net.minecraft.client.render.VertexConsumerProvider;
+import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.entity.Entity;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.math.MathHelper;
+import net.minecraft.util.math.RotationAxis;
+
+public class DarkVortexSpellRenderer implements SpellRenderer<DarkVortexSpell> {
+
+    private static float cameraDistortion;
+
+    public static float getCameraDistortion() {
+        cameraDistortion *= 0.9F;
+        cameraDistortion = MathHelper.clamp(cameraDistortion, 0, 80);
+        System.out.println(cameraDistortion);
+        return cameraDistortion;
+    }
+
+    @Override
+    public void render(MatrixStack matrices, VertexConsumerProvider vertices, DarkVortexSpell spell, Caster<?> caster, int light, float limbAngle, float limbDistance, float tickDelta, float animationProgress, float headYaw, float headPitch) {
+        matrices.push();
+        double height = caster.asEntity().getEyeY() - caster.getOriginVector().y;
+        matrices.translate(0, height + 2, 0);
+
+        Entity cameraEntity = MinecraftClient.getInstance().getCameraEntity();
+
+        float radius = (float)spell.getEventHorizonRadius();
+        float absDistance = (float)cameraEntity.getEyePos().distanceTo(caster.getOriginVector().add(0, 2, 0));
+
+        SphereModel.SPHERE.render(matrices, vertices.getBuffer(RenderLayers.getSolid()), light, 1, Math.min(radius, absDistance / 2F), 0, 0, 0, 1);
+
+        matrices.push();
+
+
+        matrices.multiply(RotationAxis.POSITIVE_Z.rotationDegrees(90));
+        matrices.multiply(RotationAxis.NEGATIVE_X.rotationDegrees(90 + cameraEntity.getYaw(tickDelta)));
+        matrices.multiply(RotationAxis.POSITIVE_Z.rotationDegrees(-cameraEntity.getPitch(tickDelta)));
+        matrices.scale(0.7F, 1, 1);
+
+
+        float distance = 1F / MathHelper.clamp((absDistance / (radius * 4)), 0.0000001F, 1);
+        distance *= distance;
+        if (absDistance < radius * 4) {
+            cameraDistortion += distance;
+        }
+
+        matrices.scale(distance, distance, distance);
+
+        matrices.push();
+        for (int i = 0; i < 10; i++) {
+            matrices.scale(0.96F, 1, 1);
+            float brightness = i / 10F;
+            SphereModel.DISK.render(matrices, vertices.getBuffer(RenderLayers.getMagicNoColor()), light, 1, radius * (1 + (0.25F * i)), brightness, brightness, brightness, 0.2F);
+        }
+        matrices.pop();
+
+        SphereModel.DISK.render(matrices, vertices.getBuffer(RenderLayers.getEndPortal()), light, 1, radius * 0.5F, 1, 0.5F, 0, 1);
+
+        matrices.pop();
+
+        if (radius > 1 && absDistance > radius) {
+            radius *= 1.1F;
+
+            matrices.scale(radius, radius, radius);
+            matrices.multiply(RotationAxis.POSITIVE_Y.rotationDegrees(animationProgress));
+            matrices.multiply(RotationAxis.POSITIVE_X.rotationDegrees(45));
+            matrices.multiply(RotationAxis.POSITIVE_Z.rotationDegrees(animationProgress * 168));
+
+
+            RenderUtil.Vertex[] CORNERS = new RenderUtil.Vertex[]{
+                    new RenderUtil.Vertex(new Vector3f(-1, -1, 0), 0, 0),
+                    new RenderUtil.Vertex(new Vector3f(-1,  1, 0), 1, 0),
+                    new RenderUtil.Vertex(new Vector3f( 1,  1, 0), 1, 1),
+                    new RenderUtil.Vertex(new Vector3f( 1, -1, 0), 0, 1)
+            };
+
+            VertexConsumer buffer = vertices.getBuffer(RenderLayer.getEntityTranslucent(new Identifier("textures/misc/forcefield.png")));
+
+            for (var corner : CORNERS) {
+                Vector4f pos = corner.position(matrices);
+                buffer.vertex(pos.x, pos.y, pos.z, 1, 1, 1, 1, corner.u(), corner.v(), 0, light, 1, 1, 1);
+            }
+        }
+        matrices.pop();
+    }
+}

src/main/java/com/minelittlepony/unicopia/client/render/spell/PlacedSpellRenderer.java

@@ -9,6 +9,7 @@ import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.PlaceableSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.Spell;
 import com.minelittlepony.unicopia.client.render.RenderUtil;
+import com.minelittlepony.unicopia.entity.mob.CastSpellEntity;
 
 import net.minecraft.client.render.RenderLayer;
 import net.minecraft.client.render.VertexConsumer;
@@ -36,6 +37,10 @@ public class PlacedSpellRenderer implements SpellRenderer<PlaceableSpell> {
     @Override
     public void render(MatrixStack matrices, VertexConsumerProvider vertices, PlaceableSpell spell, Caster<?> caster, int light, float limbAngle, float limbDistance, float tickDelta, float animationProgress, float headYaw, float headPitch) {
 
+        if (!(caster.asEntity() instanceof CastSpellEntity)) {
+            return;
+        }
+
         for (Spell delegate : spell.getDelegates()) {
 
             matrices.push();

src/main/java/com/minelittlepony/unicopia/client/render/spell/ShieldSpellRenderer.java

@@ -7,10 +7,8 @@ import com.minelittlepony.unicopia.client.render.RenderLayers;
 import com.minelittlepony.unicopia.client.render.model.SphereModel;
 import com.minelittlepony.unicopia.util.ColorHelper;
 
-import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.render.VertexConsumer;
 import net.minecraft.client.render.VertexConsumerProvider;
-import net.minecraft.client.render.VertexConsumerProvider.Immediate;
 import net.minecraft.client.util.math.MatrixStack;
 import net.minecraft.util.math.MathHelper;
 
@@ -21,9 +19,6 @@ public class ShieldSpellRenderer implements SpellRenderer<ShieldSpell> {
         double height = caster.asEntity().getEyeY() - caster.getOriginVector().y;
         matrices.translate(0, height, 0);
 
-        Immediate immediate = MinecraftClient.getInstance().getBufferBuilders().getEntityVertexConsumers();
-        immediate.draw();
-
         int color = ColorHelper.lerp(caster.getCorruption().getScaled(1) * (tickDelta / (1 + caster.asWorld().random.nextFloat())), spell.getType().getColor(), 0xFF000);
         float[] colors = ColorHelper.changeSaturation(Color.r(color), Color.g(color), Color.b(color), 4);
         float radius = 0.35F + spell.getRadius(tickDelta) + MathHelper.sin(animationProgress / 30F) * 0.01F;

src/main/java/com/minelittlepony/unicopia/client/render/spell/SpellEffectsRenderDispatcher.java

@@ -46,6 +46,7 @@ public class SpellEffectsRenderDispatcher implements SynchronousResourceReloader
     static {
         register(SpellType.PLACED_SPELL, PlacedSpellRenderer::new);
         register(SpellType.SHIELD, ShieldSpellRenderer::new);
+        register(SpellType.DARK_VORTEX, DarkVortexSpellRenderer::new);
     }
 
     @Nullable
@@ -67,6 +68,7 @@ public class SpellEffectsRenderDispatcher implements SynchronousResourceReloader
     public void render(MatrixStack matrices, VertexConsumerProvider vertices, Spell spell, Caster<?> caster, int light, float limbAngle, float limbDistance, float tickDelta, float animationProgress, float headYaw, float headPitch) {
         var renderer = getRenderer(spell);
         if (renderer != null) {
+            MinecraftClient.getInstance().getBufferBuilders().getEntityVertexConsumers().draw();
             renderer.render(matrices, vertices, spell, caster, light, limbAngle, limbDistance, tickDelta, animationProgress, headYaw, headPitch);
         }
     }

src/main/java/com/minelittlepony/unicopia/entity/mob/CastSpellEntity.java

@@ -37,6 +37,7 @@ public class CastSpellEntity extends LightEmittingEntity implements Caster<CastS
 
     public CastSpellEntity(EntityType<?> type, World world) {
         super(type, world);
+        ignoreCameraFrustum = true;
     }
 
     @Override

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

@@ -5,6 +5,7 @@ import java.util.Optional;
 import com.minelittlepony.common.util.animation.MotionCompositor;
 import com.minelittlepony.unicopia.ability.magic.SpellPredicate;
 import com.minelittlepony.unicopia.ability.magic.spell.AbstractDisguiseSpell;
+import com.minelittlepony.unicopia.client.render.spell.DarkVortexSpellRenderer;
 
 import net.minecraft.util.math.Vec3d;
 
@@ -62,6 +63,7 @@ public class PlayerCamera extends MotionCompositor {
     public double calculateFieldOfView(double fov) {
         fov += player.getMagicalReserves().getExertion().get() / 5F;
         fov += getEnergyAddition();
+        fov += DarkVortexSpellRenderer.getCameraDistortion();
 
         return fov;
     }