Crushing immovable objects since 2011
http://www.iforce2d.net/forums/
What's the problem? The RUBELoader project up on github should work for you out-of-the-box.dimecoin wrote: I played around with the java/libgdx loaders for a couple hours, but haven't had much luck.
The readme shows that you only need two lines to instantiate things. Not sure where you are getting tripped up. The test class does some verification and example rendering to show a possible implementation method.dimecoin wrote: For gdx-rube I had quite a time getting it compiled, I don't think it works with latest libgdx? I got it compiled and would load a scene and could add my own bodies to it's world, but couldn't see any objects from the .json file.
For RubeLoader it seems... quite involved? Or I'm understanding it wrong. The bootstrap is ~1K lines of code (actually, more like 500, but still?): https://github.com/tescott/RubeLoader/t ... udios/rube
I've updated RUBEloader to allow you to add things to a pre-existing world. You now also have the ability to load in separate RUBE .json files into a single scene.dimecoin wrote: 1) Both seem to create their own Box World. What if I have my own world and just want to load models from a scene? For example, say I have an existing box2d world and just want to load a 'car' model?
I have no plans to support a .JAR file at the current time.dimecoin wrote:
2) Neither have pre built .jars? Not the end of the world, but seems like an extra step
cvayer and I started working on RUBELoader back around January timeframe. He then went in a different direction than where I wanted to take things. He's got integrated atlas support. I don't. I also wanted to include the box2dcontrollers project as part of RUBEloader so we ended up diverging a bit in our approach.dimecoin wrote: 3) What is the difference between the two (gdx-rube and RubeLoader)?
Hi tescott, thanks for the reply (and keeping runtimes up to date!tescott wrote: The readme shows that you only need two lines to instantiate things. Not sure where you are getting tripped up. The test class does some verification and example rendering to show a possible implementation method.
). I'm just trying to load the car from the test examples into my own world and verify it though the debug renderer.Code: Select all
RubeSceneLoader loader = new RubeSceneLoader(myBoxWorld);
RubeScene scene = loader.loadScene(Gdx.files.internal("res/rubes/car.json"));
createFloor(); // Creates static box across bottom.Code: Select all
import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.Body;
import com.badlogic.gdx.physics.box2d.BodyDef;
import com.badlogic.gdx.physics.box2d.BodyDef.BodyType;
import com.badlogic.gdx.physics.box2d.Box2DDebugRenderer;
import com.badlogic.gdx.physics.box2d.Fixture;
import com.badlogic.gdx.physics.box2d.FixtureDef;
import com.badlogic.gdx.physics.box2d.PolygonShape;
import com.badlogic.gdx.physics.box2d.World;
import com.gushikustudios.rube.RubeScene;
import com.gushikustudios.rube.loader.RubeSceneLoader;
public class TestScreen implements ApplicationListener {
float BOX2D_MAX_STEP = 0.20f;
float BOX2D_STEP = 1 / 60f;
float WORLD_TO_BOX = 0.01f;
float BOX_TO_WORLD = 100f;
private OrthographicCamera camera;
private World boxWorld;
private Box2DDebugRenderer box2dDebugRenderer;
private Matrix4 box2dMatrix;
private float boxStep;
private int velocityIterations = 8, positionIterations = 3;
public static void main (String[] arg) {
LwjglApplicationConfiguration cfg = new LwjglApplicationConfiguration();
cfg.title = "Test Screen";
new LwjglApplication(new TestScreen(), cfg);
}
@Override
public void create () {
camera = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
box2dDebugRenderer = new Box2DDebugRenderer();
box2dMatrix = new Matrix4(camera.combined);
boxWorld = new com.badlogic.gdx.physics.box2d.World(new Vector2(0, -10), true);
RubeSceneLoader loader = new RubeSceneLoader(boxWorld);
RubeScene scene = loader.loadScene(Gdx.files.internal("res/rubes/car.json"));
createFloor();
scene.printStats();
Gdx.app.log("boxWorld Body Count", "" + boxWorld.getBodyCount());
}
@Override
public void dispose () {
}
@Override
public void pause () {
}
@Override
public void render () {
// boxStep += delta;
boxStep += Gdx.graphics.getDeltaTime();
if (boxStep >= BOX2D_MAX_STEP) {
boxStep = BOX2D_STEP;
}
while (boxStep >= BOX2D_STEP) {
boxWorld.step(BOX2D_STEP, velocityIterations, positionIterations);
boxStep -= BOX2D_STEP;
}
box2dMatrix.set(camera.combined);
box2dMatrix.scale(BOX_TO_WORLD, BOX_TO_WORLD, 1f);
box2dDebugRenderer.render(boxWorld, box2dMatrix);
}
@Override
public void resize (int arg0, int arg1) {
}
@Override
public void resume () {
}
public void createFloor () {
BodyDef bodyDef = new BodyDef();
bodyDef.type = BodyType.StaticBody;
Body body = boxWorld.createBody(bodyDef);
PolygonShape rectangle = new PolygonShape();
float width = Gdx.graphics.getWidth();
float height = 20;
rectangle.setAsBox(width * WORLD_TO_BOX, height / 2 * WORLD_TO_BOX);
FixtureDef fixtureDef = new FixtureDef();
fixtureDef.shape = rectangle;
fixtureDef.density = 0.5f;
fixtureDef.friction = 0.4f;
fixtureDef.restitution = 0.6f;
Fixture fixture = body.createFixture(fixtureDef);
rectangle.dispose();
}
}
Code: Select all
{
"activeScript" : "for (int n = 0; n< 8; n++)\n\tgetFixture(\"fixture\"+n).setName(\"playerfoot\"+n);\n",
"metaworld" :
{
"allowSleep" : true,
"autoClearForces" : true,
"continuousPhysics" : true,
"gravity" :
{
"x" : 0,
"y" : -10.0
},
"metabody" :
[
{
"angle" : 0,
"angularVelocity" : 0,
"awake" : true,
"fixture" :
[
{
"density" : 1,
"friction" : 0.2000000029802322,
"id" : 9,
"name" : "playerfoot1",
"shapes" :
[
{
"type" : "line"
}
],
"vertices" :
{
"x" : [ -4.119325637817383, 9.119326591491699 ],
"y" : [ 0.06462776660919189, 0.06462776660919189 ]
}
}
],
"id" : 5,
"linearVelocity" : 0,
"name" : "ground",
"position" :
{
"x" : 0.002097775693982840,
"y" : 0.0008306311792694032
},
"type" : "static"
},
{
"angle" : 0,
"angularVelocity" : 0,
"awake" : true,
"fixture" :
[
{
"density" : 1,
"friction" : 0.2000000029802322,
"id" : 10,
"name" : "antenna2",
"shapes" :
[
{
"type" : "polygon"
}
],
"vertices" :
{
"x" :
[
-0.01557338237762451,
0.01557314395904541,
0.01557314395904541,
-0.01557338237762451
],
"y" :
[
-0.1605185270309448,
-0.1605185270309448,
0.2251464128494263,
0.2251464128494263
]
}
}
],
"id" : 6,
"linearVelocity" : 0,
"massData-I" : 0.0001624017459107563,
"massData-center" :
{
"x" : -1.192092895507812e-07,
"y" : 0.03231394290924072
},
"massData-mass" : 0.01201212313026190,
"name" : "antenna2",
"position" :
{
"x" : -1.805367946624756,
"y" : 1.814880132675171
},
"type" : "dynamic"
},
{
"angle" : 0,
"angularVelocity" : 0,
"awake" : true,
"fixture" :
[
{
"density" : 1.250,
"filter-categoryBits" : 8,
"friction" : 0.9800000190734863,
"id" : 19,
"name" : "playerfoot4",
"shapes" :
[
{
"radius" : 0.1042968779802322,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ -0.1802209466695786 ],
"y" : [ 0.1802209317684174 ]
}
},
{
"density" : 1.250,
"filter-categoryBits" : 8,
"friction" : 0.9800000190734863,
"id" : 12,
"name" : "playerfoot2",
"shapes" :
[
{
"radius" : 0.1042968779802322,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ -1.924221670890347e-08 ],
"y" : [ 0.2548708915710449 ]
}
},
{
"density" : 1.250,
"filter-categoryBits" : 8,
"friction" : 0.9800000190734863,
"id" : 18,
"name" : "playerfoot6",
"shapes" :
[
{
"radius" : 0.1042968779802322,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ 0.1802209168672562 ],
"y" : [ 0.1802209615707397 ]
}
},
{
"density" : 1.250,
"filter-categoryBits" : 8,
"friction" : 0.9800000190734863,
"id" : 11,
"name" : "fixture1",
"shapes" :
[
{
"radius" : 0.1042968779802322,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ 0.2548708915710449 ],
"y" : [ -5.247950321063399e-05 ]
}
},
{
"density" : 1.250,
"filter-categoryBits" : 8,
"friction" : 0.9800000190734863,
"id" : 13,
"name" : "playerfoot0",
"shapes" :
[
{
"radius" : 0.1042968779802322,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ -0.2548708915710449 ],
"y" : [ 0.0 ]
}
},
{
"density" : 1.250,
"filter-categoryBits" : 8,
"friction" : 0.9800000190734863,
"id" : 15,
"name" : "playerfoot3",
"shapes" :
[
{
"radius" : 0.1042968779802322,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ -5.246026194072329e-05 ],
"y" : [ -0.2548708915710449 ]
}
},
{
"density" : 1.250,
"filter-categoryBits" : 8,
"friction" : 0.9800000190734863,
"id" : 1,
"name" : "playerfoot7",
"shapes" :
[
{
"radius" : 0.1042968779802322,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ -0.1802580207586288 ],
"y" : [ -0.1801838576793671 ]
}
},
{
"density" : 1.250,
"filter-categoryBits" : 8,
"friction" : 0.9800000190734863,
"id" : 14,
"name" : "playerfoot5",
"shapes" :
[
{
"radius" : 0.1042968779802322,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ 0.1801838427782059 ],
"y" : [ -0.180258035659790 ]
}
}
],
"id" : 7,
"linearVelocity" : 0,
"massData-I" : 0.02405765838921070,
"massData-center" :
{
"x" : -1.583783705427777e-05,
"y" : -6.561058853549184e-06
},
"massData-mass" : 0.3417373895645142,
"name" : "playerlower",
"position" :
{
"x" : 1.279839158058167,
"y" : 2.483422040939331
},
"type" : "dynamic"
},
{
"angle" : 0,
"angularVelocity" : 0,
"awake" : true,
"fixture" :
[
{
"density" : 1,
"friction" : 0.2000000029802322,
"id" : 8,
"name" : "antenna1",
"shapes" :
[
{
"type" : "polygon"
}
],
"vertices" :
{
"x" :
[
-0.01943159103393555,
0.0194314718246460,
0.0194314718246460,
-0.01943159103393555
],
"y" :
[
-0.2002876996994019,
-0.2002876996994019,
0.2002875804901123,
0.2002875804901123
]
}
}
],
"id" : 4,
"linearVelocity" : 0,
"massData-I" : 0.0002101245918311179,
"massData-center" :
{
"x" : -5.960464477539062e-08,
"y" : -5.960464477539062e-08
},
"massData-mass" : 0.01556758210062981,
"name" : "antenna1",
"position" :
{
"x" : -1.805551290512085,
"y" : 1.473527073860168
},
"type" : "dynamic"
},
{
"angle" : 0,
"angularVelocity" : 0,
"awake" : true,
"fixture" :
[
{
"density" : 4.0,
"friction" : 1,
"id" : 4,
"name" : "rearwheel",
"shapes" :
[
{
"radius" : 0.4391508996486664,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ 0.0 ],
"y" : [ 0.0 ]
}
}
],
"id" : 2,
"linearVelocity" : 0,
"massData-I" : 0.2336872369050980,
"massData-mass" : 2.423468828201294,
"name" : "rearwheel",
"position" :
{
"x" : -1.281174421310425,
"y" : 0.4994073510169983
},
"type" : "dynamic"
},
{
"angle" : 0,
"angularVelocity" : 0,
"awake" : true,
"fixture" :
[
{
"density" : 4.0,
"friction" : 1,
"id" : 2,
"name" : "frontwheel",
"shapes" :
[
{
"radius" : 0.4391508996486664,
"type" : "circle"
}
],
"vertices" :
{
"x" : [ 0.0 ],
"y" : [ 0.0 ]
}
}
],
"id" : 1,
"linearVelocity" : 0,
"massData-I" : 0.2336872369050980,
"massData-mass" : 2.423468828201294,
"name" : "frontwheel",
"position" :
{
"x" : 1.646994829177856,
"y" : 0.4994073510169983
},
"type" : "dynamic"
},
{
"angle" : 0,
"angularVelocity" : 0,
"awake" : true,
"fixture" :
[
{
"density" : 0.750,
"friction" : 0.8000000119209290,
"id" : 6,
"name" : "carlower",
"restitution" : 0.1000000014901161,
"shapes" :
[
{
"type" : "polygon"
}
],
"vertices" :
{
"x" :
[
2.391760110855103,
2.371400117874146,
2.033610105514526,
-1.823310017585754,
-2.200170040130615,
-2.240900039672852,
-2.064899921417236,
2.104389905929565
],
"y" :
[
-0.2876459956169128,
0.1395390033721924,
0.2991139888763428,
0.5205680131912231,
0.334744006395340,
-0.2985900044441223,
-0.3891539871692657,
-0.3894709944725037
]
}
},
{
"density" : 0.750,
"friction" : 0.8000000119209290,
"id" : 7,
"name" : "carupper",
"restitution" : 0.1000000014901161,
"shapes" :
[
{
"type" : "polygon"
}
],
"vertices" :
{
"x" :
[
1.208260059356689,
0.6846150159835815,
0.419759988784790,
-0.4459980130195618,
-0.7959259748458862,
-1.103929996490479,
-1.367390036582947
],
"y" :
[
0.3468869924545288,
0.8653119802474976,
0.9186699986457825,
1.001880049705505,
0.9778829813003540,
0.8607249855995178,
0.4947359859943390
]
}
}
],
"id" : 3,
"linearVelocity" : 0,
"massData-I" : 5.389615058898926,
"massData-center" :
{
"x" : -0.06040599942207336,
"y" : 0.1643623560667038
},
"massData-mass" : 3.529048681259155,
"name" : "car",
"position" :
{
"x" : 0.02885369956493378,
"y" : 0.7808920145034790
},
"type" : "dynamic"
},
{
"angle" : 0,
"angularVelocity" : 0,
"awake" : true,
"fixedRotation" : true,
"fixture" :
[
{
"density" : 1.789999961853027,
"friction" : 0.250,
"id" : 23,
"name" : "playerupper",
"shapes" :
[
{
"type" : "polygon"
}
],
"vertices" :
{
"x" :
[
0.3002238869667053,
0.3002237379550934,
0.2154128700494766,
-0.2113303095102310,
-0.3002237379550934,
-0.3002237081527710,
-0.2218291610479355,
0.2283110022544861
],
"y" :
[
-0.4160324931144714,
0.3051185309886932,
0.4533979892730713,
0.4528201818466187,
0.3051185309886932,
-0.4160327315330505,
-0.5100000500679016,
-0.5108833909034729
]
}
}
],
"id" : 8,
"linearVelocity" : 0,
"massData-I" : 0.001082192873582244,
"massData-center" :
{
"x" : 0.0003362183924764395,
"y" : -0.03289639577269554
},
"massData-mass" : 0.9999140501022339,
"name" : "playerupper",
"position" :
{
"x" : 1.279839158058167,
"y" : 3.114712476730347
},
"type" : "dynamic"
}
],
"metaimage" :
[
{
"body" : 3,
"center" :
{
"x" : 0.01010882854461670,
"y" : 0.2893288135528564
},
"file" : "images/carbody.png",
"filter" : 1,
"id" : 3,
"name" : "carbody",
"opacity" : 0.50,
"renderOrder" : 1,
"scale" : 2.507289886474609
},
{
"body" : 1,
"center" :
{
"x" : -0.001794457435607910,
"y" : -0.004129886627197266
},
"file" : "images/carwheel.png",
"filter" : 1,
"id" : 2,
"name" : "frontwheel",
"opacity" : 1,
"scale" : 1
},
{
"body" : 2,
"center" :
{
"x" : -0.001794457435607910,
"y" : -0.004129886627197266
},
"file" : "images/carwheel.png",
"filter" : 1,
"id" : 1,
"name" : "rearwheel",
"opacity" : 1,
"scale" : 1
}
],
"metajoint" :
[
{
"anchorA" :
{
"x" : -1.310029983520508,
"y" : -0.3029899895191193
},
"anchorB" :
{
"x" : -0.000221252441406250,
"y" : 0
},
"bodyA" : 3,
"bodyB" : 2,
"collideConnected" : false,
"enableMotor" : true,
"id" : 1,
"localAxisA" :
{
"x" : 0,
"y" : 1
},
"maxMotorTorque" : 1,
"motorSpeed" : 0,
"name" : "rearwheel",
"springDampingRatio" : 0.07500000298023224,
"springFrequency" : 4.0,
"type" : "wheel"
},
{
"anchorA" :
{
"x" : -1.834210038185120,
"y" : 0.4997670054435730
},
"anchorB" :
{
"x" : 0.0001915524917421862,
"y" : -0.1928684562444687
},
"bodyA" : 3,
"bodyB" : 4,
"collideConnected" : false,
"enableLimit" : true,
"enableMotor" : false,
"id" : 3,
"lowerLimit" : -0.4363323152065277,
"maxMotorTorque" : 0,
"motorSpeed" : 0,
"name" : "antennapivot1",
"referenceAngle" : 0,
"type" : "revolute",
"upperLimit" : 0.4363323152065277
},
{
"anchorA" :
{
"x" : 1.618139982223511,
"y" : -0.3086310029029846
},
"anchorB" :
{
"x" : 0.001029968261718750,
"y" : 0
},
"bodyA" : 3,
"bodyB" : 1,
"collideConnected" : false,
"enableMotor" : true,
"id" : 2,
"localAxisA" :
{
"x" : 0,
"y" : 1
},
"maxMotorTorque" : 1,
"motorSpeed" : 0,
"name" : "frontwheel",
"springDampingRatio" : 0.07500000298023224,
"springFrequency" : 4.0,
"type" : "wheel"
},
{
"anchorA" :
{
"x" : -2.409670114517212,
"y" : 0.8091080188751221
},
"anchorB" :
{
"x" : 0.001631259918212891,
"y" : 0.1164729595184326
},
"bodyA" : 3,
"bodyB" : 4,
"collideConnected" : false,
"dampingRatio" : 0.6999999880790710,
"frequency" : 5.0,
"id" : 5,
"length" : 0.5768910050392151,
"name" : "antennaspring1",
"type" : "distance"
},
{
"anchorA" :
{
"x" : 0.0003599907504394650,
"y" : 0.1867433339357376
},
"anchorB" :
{
"x" : 0.0001534871698822826,
"y" : -0.1545725017786026
},
"bodyA" : 4,
"bodyB" : 6,
"collideConnected" : false,
"enableLimit" : true,
"enableMotor" : false,
"id" : 4,
"lowerLimit" : -0.4363323152065277,
"maxMotorTorque" : 0,
"motorSpeed" : 0,
"name" : "antennapivot2",
"referenceAngle" : 0,
"type" : "revolute",
"upperLimit" : 0.4363323152065277
},
{
"anchorA" :
{
"x" : 0,
"y" : -0.7027311325073242
},
"anchorB" : 0,
"bodyA" : 8,
"bodyB" : 7,
"collideConnected" : false,
"enableMotor" : false,
"id" : 7,
"localAxisA" :
{
"x" : 0,
"y" : 1
},
"maxMotorTorque" : 0,
"motorSpeed" : 0,
"name" : "playerfoot",
"springDampingRatio" : 0.8000000119209290,
"springFrequency" : 4.0,
"type" : "wheel"
},
{
"anchorA" :
{
"x" : -0.5752646923065186,
"y" : 0.4278329610824585
},
"anchorB" :
{
"x" : -0.0003728568553924561,
"y" : 0.0870840996503830
},
"bodyA" : 4,
"bodyB" : 6,
"collideConnected" : false,
"dampingRatio" : 0.6999999880790710,
"frequency" : 5.0,
"id" : 6,
"length" : 0.5768910050392151,
"name" : "antennaspring2",
"type" : "distance"
}
],
"positionIterations" : 3,
"stepsPerSecond" : 60.0,
"subStepping" : false,
"velocityIterations" : 8,
"warmStarting" : true
}
}
Anyone have a raw/export .json I could use to test with?