Add firestorm spell

src/main/java/electroblob/wizardry/registry/Spells.java

@@ -244,6 +244,7 @@ public final class Spells {
 
 	public static final Spell stormcloud = placeholder();
 
+	public static final Spell firestorm = placeholder();
 	public static final Spell zombie_apocalypse = placeholder();
 
 	@SubscribeEvent
@@ -451,6 +452,7 @@ public final class Spells {
 
 		registry.register(new Stormcloud());
 
+		registry.register(new Firestorm());
 		registry.register(new ZombieApocalypse());
 
 	}

src/main/java/electroblob/wizardry/spell/Firestorm.java

@@ -0,0 +1,111 @@
+package electroblob.wizardry.spell;
+
+import electroblob.wizardry.client.DrawingUtils;
+import electroblob.wizardry.item.SpellActions;
+import electroblob.wizardry.registry.WizardryItems;
+import electroblob.wizardry.util.BlockUtils;
+import electroblob.wizardry.util.BlockUtils.SurfaceCriteria;
+import electroblob.wizardry.util.EntityUtils;
+import electroblob.wizardry.util.ParticleBuilder;
+import electroblob.wizardry.util.ParticleBuilder.Type;
+import electroblob.wizardry.util.SpellModifiers;
+import net.minecraft.entity.EntityLiving;
+import net.minecraft.entity.EntityLivingBase;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.init.Blocks;
+import net.minecraft.util.EnumFacing;
+import net.minecraft.util.EnumHand;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.world.World;
+
+import javax.annotation.Nullable;
+
+public class Firestorm extends SpellAreaEffect {
+
+	public Firestorm(){
+		super("firestorm", SpellActions.POINT_DOWN, false);
+		this.soundValues(1.5f, 1.0f, 0);
+		this.alwaysSucceed(true);
+		addProperties(BURN_DURATION);
+	}
+
+	@Override
+	public boolean cast(World world, EntityPlayer caster, EnumHand hand, int ticksInUse, SpellModifiers modifiers){
+		burnNearbyBlocks(world, new Vec3d(caster.posX, caster.getEntityBoundingBox().minY, caster.posZ), caster, modifiers);
+		return super.cast(world, caster, hand, ticksInUse, modifiers);
+	}
+
+	@Override
+	public boolean cast(World world, EntityLiving caster, EnumHand hand, int ticksInUse, EntityLivingBase target, SpellModifiers modifiers){
+		burnNearbyBlocks(world, caster.getPositionVector(), caster, modifiers);
+		return super.cast(world, caster, hand, ticksInUse, target, modifiers);
+	}
+
+	@Override
+	public boolean cast(World world, double x, double y, double z, EnumFacing direction, int ticksInUse, int duration, SpellModifiers modifiers){
+		burnNearbyBlocks(world, new Vec3d(x, y, z), null, modifiers);
+		return super.cast(world, x, y, z, direction, ticksInUse, duration, modifiers);
+	}
+
+	@Override
+	protected boolean affectEntity(World world, Vec3d origin, @Nullable EntityLivingBase caster, EntityLivingBase target, int targetCount, int ticksInUse, SpellModifiers modifiers){
+		target.setFire(getProperty(BURN_DURATION).intValue());
+		return true;
+	}
+
+	@Override
+	protected void spawnParticleEffect(World world, Vec3d origin, double radius, @Nullable EntityLivingBase caster, SpellModifiers modifiers){
+
+		for(int i=0; i<100; i++){
+			double speed = (world.rand.nextBoolean() ? 1 : -1) * (0.1 + 0.05 * world.rand.nextDouble());
+			ParticleBuilder.create(Type.MAGIC_FIRE)
+					.pos(origin.x, origin.y + world.rand.nextDouble() * 3, origin.z)
+					.vel(0, 0, 0)
+					.scale(2)
+					.time(40 + world.rand.nextInt(10))
+					.spin(world.rand.nextDouble() * (radius - 0.5) + 0.5, speed)
+					.spawn(world);
+		}
+
+		for(int i=0; i<60; i++){
+			double speed = (world.rand.nextBoolean() ? 1 : -1) * (0.05 + 0.02 * world.rand.nextDouble());
+			float r = world.rand.nextFloat();
+			ParticleBuilder.create(Type.CLOUD)
+					.pos(origin.x, origin.y + world.rand.nextDouble() * 2.5, origin.z)
+					.clr(DrawingUtils.mix(DrawingUtils.mix(0xffbe00, 0xff3600, r/0.6f), 0x222222, (r - 0.6f)/0.4f))
+					.spin(r * (radius - 1) + 0.5, speed)
+					.spawn(world);
+		}
+	}
+
+	private void burnNearbyBlocks(World world, Vec3d origin, @Nullable EntityLivingBase caster, SpellModifiers modifiers){
+
+		if(!world.isRemote && EntityUtils.canDamageBlocks(caster, world)){
+
+			double radius = getProperty(EFFECT_RADIUS).floatValue() * modifiers.get(WizardryItems.blast_upgrade);
+
+			for(int i = -(int)radius; i <= (int)radius; i++){
+				for(int j = -(int)radius; j <= (int)radius; j++){
+
+					BlockPos pos = new BlockPos(origin).add(i, 0, j);
+
+					Integer y = BlockUtils.getNearestSurface(world, new BlockPos(pos), EnumFacing.UP, (int)radius, true, SurfaceCriteria.NOT_AIR_TO_AIR);
+
+					if(y != null){
+
+						pos = new BlockPos(pos.getX(), y, pos.getZ());
+
+						double dist = origin.distanceTo(new Vec3d(origin.x + i, y, origin.z + j));
+
+						// Randomised with weighting so that the nearer the block the more likely it is to be set alight.
+						if(y != -1 && world.rand.nextInt((int)(dist * 2) + 1) < radius && dist < radius && dist > 1.5){
+							world.setBlockState(pos, Blocks.FIRE.getDefaultState());
+						}
+					}
+				}
+			}
+		}
+	}
+
+}

src/main/java/electroblob/wizardry/util/BlockUtils.java

@@ -460,7 +460,7 @@ public final class BlockUtils {
 				|| world.isSideSolid(pos, side) && world.isAirBlock(pos.offset(side)));
 
 		/** Surface criterion which defines a surface as the boundary between any non-air block and an air block.
-		 * Used for particles. */
+		 * Used for particles, and is also good for placing fire. */
 		// Was getNearestFloorLevelC
 		SurfaceCriteria NOT_AIR_TO_AIR = basedOn(World::isAirBlock).flip();