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Added initial hit support with mini explosions and debris...
asteroids aren't broken up yet.
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+405
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10 files changed

+405
-5
lines changed

‎sigem/assets/Textures/white-puff256.png‎

34.4 KB
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‎sigem/src/main/java/sigem/es/ObjectType.java‎

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Original file line numberDiff line numberDiff line change
@@ -50,8 +50,10 @@ public class ObjectType implements EntityComponent {
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public static final String TYPE_SHIP = "ship";
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public static final String TYPE_PLANET = "planet";
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public static final String TYPE_ASTEROID = "asteroid";
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public static final String TYPE_ASTEROID_CHUNK = "asteroidChunk";
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public static final String TYPE_THRUST = "thrust";
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public static final String TYPE_MISSILE = "missile";
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public static final String TYPE_PLASMA_EXPLOSION = "plasmaExplosion";
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private int type;
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‎sigem/src/main/java/sigem/sim/AsteroidHitListener.java‎

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/*
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* $Id$
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*
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* Copyright (c) 2019, Simsilica, LLC
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package sigem.sim;
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import java.util.Random;
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import org.slf4j.*;
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import com.simsilica.es.*;
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import com.simsilica.mathd.*;
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import com.simsilica.sim.*;
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import sigem.es.*;
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/**
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* Checks for missile-asteroid hits or high energy asteroid
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* hits and implements asteroid damage.
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*
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* @author Paul Speed
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*/
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public class AsteroidHitListener extends AbstractGameSystem
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implements ContactListener {
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static Logger log = LoggerFactory.getLogger(AsteroidHitListener.class);
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private EntityData ed;
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private GameEntities gameEntities;
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private Random rand = new Random(0);
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public AsteroidHitListener() {
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}
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@Override
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protected void initialize() {
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this.ed = getSystem(EntityData.class, true);
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this.gameEntities = getSystem(GameEntities.class, true);
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getSystem(CollisionSystem.class).addContactListener(this);
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}
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@Override
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protected void terminate() {
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getSystem(CollisionSystem.class).removeContactListener(this);
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}
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@Override
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public void newContact( Contact c ) {
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ObjectType type1 = ed.getComponent(c.b1.bodyId, ObjectType.class);
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ObjectType type2 = ed.getComponent(c.b2.bodyId, ObjectType.class);
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String t1 = type1.getTypeName(ed);
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String t2 = type2.getTypeName(ed);
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if( !ObjectType.TYPE_ASTEROID.equals(t1) && !ObjectType.TYPE_ASTEROID.equals(t2) ) {
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// Neither side is an asteroid... nothing to do
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return;
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}
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// If either side is a chunk then we'll negate the energy
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if( ObjectType.TYPE_ASTEROID_CHUNK.equals(t1) || ObjectType.TYPE_ASTEROID_CHUNK.equals(t2) ) {
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c.energy = 0;
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return;
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}
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log.info("contact:" + c + " types:" + t1 + ", " + t2);
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if( ObjectType.TYPE_MISSILE.equals(t1) ) {
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// Blow up b2
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missileHit(c.b1, c.b2, c);
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} else if( ObjectType.TYPE_MISSILE.equals(t2) ) {
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// Blow up b1
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missileHit(c.b2, c.b1, c);
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}
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}
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protected void missileHit( Body missile, Body asteroid, Contact contact ) {
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EntityId shooter = ed.getComponent(missile.bodyId, CreatedBy.class).getCreatorId();
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log.info("Shooter:" + shooter + " name:" + ed.getComponent(shooter, Name.class));
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ed.removeEntity(missile.bodyId);
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gameEntities.createExplosion(missile.pos, 1);
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// Create some asteroid debris
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int count = rand.nextInt(3) + 3;
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for( int i = 0; i < count; i++ ) {
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double x = rand.nextDouble() * 2 - 1;
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double z = rand.nextDouble() * 2 - 1;
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Vec3d dir = new Vec3d(x, 0, z);
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double size = 0.2 + rand.nextDouble() * 0.4;
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EntityId chunk = gameEntities.createAsteroidChunk(missile.pos, dir,
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new Vec3d(rand.nextDouble() + 1, rand.nextDouble(), 0),
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size);
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}
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if( asteroid.radius <= 1 ) {
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// Just gone
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ed.removeEntity(asteroid.bodyId);
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return;
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}
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// Else we need to break it up
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}
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}

‎sigem/src/main/java/sigem/sim/Body.java‎

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@@ -38,6 +38,8 @@
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import java.util.concurrent.atomic.AtomicLong;
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import com.google.common.base.MoreObjects;
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import com.simsilica.es.EntityId;
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import com.simsilica.mathd.*;
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@@ -98,4 +100,17 @@ public void integrate( double stepTime ) {
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// other things know where the object is for real
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bounds.setCenter(pos);
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}
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@Override
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public String toString() {
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return MoreObjects.toStringHelper(getClass().getSimpleName())
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.add("bodyId", bodyId)
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.add("pos", pos)
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.add("velocity", velocity)
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.add("acceleration", acceleration)
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.add("radius", radius)
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.add("invMass", invMass)
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.add("driver", driver)
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.toString();
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}
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}

‎sigem/src/main/java/sigem/sim/CollisionSystem.java‎

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@@ -64,9 +64,19 @@ public class CollisionSystem extends AbstractGameSystem
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private SafeArrayList<Body> bodies = new SafeArrayList<>(Body.class);
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private SafeArrayList<ContactListener> listeners = new SafeArrayList<>(ContactListener.class);
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public CollisionSystem() {
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}
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public void addContactListener( ContactListener l ) {
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listeners.add(l);
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}
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public void removeContactListener( ContactListener l ) {
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listeners.remove(l);
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}
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@Override
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protected void initialize() {
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this.ed = getSystem(EntityData.class);
@@ -78,6 +88,12 @@ protected void initialize() {
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protected void terminate() {
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getSystem(SimplePhysics.class).removePhysicsListener(this);
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}
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protected void fireNewContact( Contact c ) {
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for( ContactListener l : listeners.getArray() ) {
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l.newContact(c);
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}
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}
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@Override
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public void beginFrame( SimTime time ) {
@@ -136,6 +152,14 @@ public void endFrame( SimTime time ) {
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contact.energy = energy;
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//log.info("speed1:" + speed1 + " speed2:" + speed2 + " energy:" + energy);
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// Notiy the listeners about the contact... this gives
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// them a chance to adjust contact parameters before
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// we deal with energy
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fireNewContact(contact);
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if( contact.energy == 0 ) {
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continue;
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}
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// We want the collisions to be elastic... if we only
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// use the exact energy it will only be enough to stop
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// the objects, not separate them with a bounce.
@@ -181,6 +205,14 @@ private Contact checkContact( Body b1, Body b2 ) {
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c.cn.y = 0; // just in case
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c.cn.divideLocal(dist);
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c.pen = dist - b1.radius - b2.radius;
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if( c.pen < 0 ) {
210+
// Put the contact point halfway between the bounaries
211+
c.cp = b1.pos.add(c.cn.mult(b1.radius + c.pen * 0.5));
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} else {
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// Put the conact point on b1's surface
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c.cp = b1.pos.add(c.cn.mult(b1.radius));
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}
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return c;
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}

‎sigem/src/main/java/sigem/sim/Contact.java‎

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package sigem.sim;
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import com.google.common.base.MoreObjects;
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import com.simsilica.mathd.*;
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/**
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this.b1 = b1;
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this.b2 = b2;
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}
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@Override
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public String toString() {
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return MoreObjects.toStringHelper(getClass().getSimpleName())
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.add("b1", b1)
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.add("b2", b2)
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.add("pen", pen)
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.add("cp", cp)
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.add("cn", cn)
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.add("energy", energy)
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.toString();
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}
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}

‎sigem/src/main/java/sigem/sim/ContactListener.java‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,47 @@
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/*
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* $Id$
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*
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* Copyright (c) 2019, Simsilica, LLC
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* All rights reserved.
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*
7+
* Redistribution and use in source and binary forms, with or without
8+
* modification, are permitted provided that the following conditions
9+
* are met:
10+
*
11+
* 1. Redistributions of source code must retain the above copyright
12+
* notice, this list of conditions and the following disclaimer.
13+
*
14+
* 2. Redistributions in binary form must reproduce the above copyright
15+
* notice, this list of conditions and the following disclaimer in
16+
* the documentation and/or other materials provided with the
17+
* distribution.
18+
*
19+
* 3. Neither the name of the copyright holder nor the names of its
20+
* contributors may be used to endorse or promote products derived
21+
* from this software without specific prior written permission.
22+
*
23+
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24+
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25+
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
26+
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
27+
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
28+
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29+
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30+
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31+
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
32+
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33+
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
34+
* OF THE POSSIBILITY OF SUCH DAMAGE.
35+
*/
36+
37+
package sigem.sim;
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39+
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/**
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* Notified about contacts produced by the collision system.
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*
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* @author Paul Speed
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*/
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public interface ContactListener {
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public void newContact( Contact c );
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}

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