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package fr.umlv.java.wallj.block;
import fr.umlv.java.wallj.board.TileVec2;
import fr.umlv.java.wallj.context.Context;
import fr.umlv.java.wallj.context.Updateables;
import fr.umlv.java.wallj.event.BombExplosionEvent;
import fr.umlv.java.wallj.event.Event;
import fr.umlv.java.wallj.event.Events;
import org.jbox2d.common.Vec2;
import org.jbox2d.dynamics.BodyType;
import org.jbox2d.dynamics.Fixture;
import java.awt.*;
import java.util.Objects;
import java.util.stream.Stream;
/**
* A garbage block.
*
* @author Pacien TRAN-GIRARD
*/
public class GarbageBlock extends JBoxBlock {
private static final Color COLOR = new Color(102, 51, 0);
private static final int STOP_RAYCAST = 0;
private static final float EXPLOSION_RANGE = 20f * TileVec2.TILE_DIM;
GarbageBlock(Vec2 pos) {
super(BlockType.GARBAGE, BodyType.DYNAMIC, SolidDef.circleShape(), pos);
}
@Override
public Stream<Event> update(Context context) {
return Updateables.updateAll(context,
this::handleExplosionBlasts,
this::paint);
}
private Stream<Event> handleExplosionBlasts(Context context) {
Events.filter(context.getEvents(), BombExplosionEvent.class).forEach(explosion -> {
Vec2 source = explosion.getSource().toVec2();
context.getGame().getCurrentStage().getWorld().raycast((fixture, point, normal, fraction) -> {
if (isSelf(fixture)) getBody().applyForceToCenter(computeBlastForce(source));
return STOP_RAYCAST;
}, source, getPos());
});
return Stream.empty();
}
private Stream<Event> paint(Context context) {
context.getGraphicsContext().paintCircle(COLOR, getPos(), TileVec2.TILE_DIM);
return Stream.empty();
}
private boolean isSelf(Fixture fixture) {
for (Fixture self = getBody().getFixtureList(); self != null; self = self.getNext())
if (Objects.equals(fixture, self))
return true;
return false;
}
private Vec2 computeBlastForce(Vec2 source) {
Vec2 diff = getPos().sub(source);
float dist = diff.normalize();
return diff.mul(EXPLOSION_RANGE / dist);
}
}
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