Box2d example -- demo3 bicycle

Package COM. cvte. game; import COM. badlogic. GDX. applicationadapter; import COM. badlogic. GDX. GDX; import COM. badlogic. GDX. input. keys; import COM. badlogic. GDX. inputprocessor; import COM. badlogic. GDX. graphics. gl20; import COM. badlogic. GDX. graphics. orthographiccamera; 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. circleshape; import COM. badlogic. GDX. physics. box2d. edgeshape; import COM. badlogic. GDX. physics. box2d. fixturedef; import COM. badlogic. GDX. physics. box2d. world; import COM. badlogic. GDX. physics. box2d. joints. distancejoint; import COM. badlogic. GDX. physics. box2d. joints. extends; public class demo3 extends applicationadapter implements inputprocessor {Private Static final float pxtm = 80; protected orthographiccamera mcamera; private extends mrenderer; private world mworld; private body mbodya; private body mbodyb; private distancejoint mdistancejoint; @ overridepublic void create () {float camerawidth = GDX. graphics. getwidth ()/pxtm; float cameraheight = GDX. graphics. getheight ()/pxtm; mcamera = new orthographiccamera (camerawidth, cameraheight); mcamera. position. set (camerawidth/2, cameraheight/2, 0); mcamera. update (); mrenderer = new box2ddebugrenderer (); mworld = New World (New vector2 (0,-10), true ); /// ground // {// bodydef BD = new bodydef (); // BD. type = bodytype. staticbody; // BD. position. set (toworldsize (0), toworldsize (20); // edgeshape = new edgeshape (); // edgeshape. set (New vector2 (toworldsize (0), toworldsize (0), new vector2 (toworldsize (GDX. graphics. getwidth (), toworldsize (0); // fixturedef FD = new fixturedef (); // FD. shape = edgeshape; // body ground = mworld. createbody (BD); // ground. createfixture (FD); //} // wall {bodydef BD = new bodydef (); BD. type = bodytype. staticbody; edgeshape = new edgeshape (); fixturedef FD = new fixturedef (); FD. shape = edgeshape; body box = mworld. createbody (BD); edgeshape. set (New vector2 (toworldsize (0), toworldsize (0), new vector2 (toworldsize (GDX. graphics. getwidth (), toworldsize (0); box. createfixture (FD); edgeshape. set (New vector2 (toworldsize (GDX. graphics. getwidth (), toworldsize (0), new vector2 (toworldsize (GDX. graphics. getwidth (), toworldsize (GDX. graphics. getheight (); box. createfixture (FD); edgeshape. set (New vector2 (toworldsize (GDX. graphics. getwidth (), toworldsize (GDX. graphics. getheight (), new vector2 (0, toworldsize (GDX. graphics. getheight (); box. createfixture (FD); edgeshape. set (New vector2 (toworldsize (0), toworldsize (GDX. graphics. getheight (), new vector2 (0, toworldsize (0); box. createfixture (FD);} // ball {bodydef BD = new bodydef (); BD. type = bodytype. dynamicbody; BD. position. set (toworldsize (400), toworldsize (800); circleshape = new circleshape (); circleshape. setradius (toworldsize (20); fixturedef FD = new fixturedef (); FD. shape = circleshape; FD. density = 1; FD. restitution = 1; body ball = mworld. createbody (BD); ball. createfixture (FD);} createbodies (); createdistancejoint (); GDX. input. setinputprocessor (this) ;}@ overridepublic void dispose () {mrenderer. dispose (); mworld. dispose (); mcamera = NULL ;}@ overridepublic void render () {GDX. GL. glclearcolor (1, 1, 1, 1); GDX. GL. glclear (gl1_gl _ color_buffer_bit); mworld. STEP (GDX. app. getgraphics (). getdeltatime (), 6, 2); mrenderer. render (mworld, mcamera. combined);} private float toworldsize (float POS) {return (POS/pxtm);}/*** create two rigid bodies for joint connection */private void createbodies () {vector2 POSA = new vector2 (toworldsize (100), toworldsize (100); vector2 POSB = new vector2 (toworldsize (200), toworldsize (100 )); {bodydef BD = new bodydef (); BD. type = bodytype. dynamicbody; BD. position. set (POSA. x, POSA. y); circleshape = new circleshape (); circleshape. setradius (toworldsize (30); fixturedef FD = new fixturedef (); FD. shape = circleshape; FD. density = 1; FD. friction = 0.5f; FD. restitution = 0; mbodya = mworld. createbody (BD); mbodya. createfixture (FD) ;}{ bodydef BD = new bodydef (); BD. type = bodytype. dynamicbody; BD. position. set (POSB. x, POSB. y); circleshape = new circleshape (); circleshape. setradius (toworldsize (15); fixturedef FD = new fixturedef (); FD. shape = circleshape; FD. density = 1; FD. friction = 0.5f; FD. restitution = 0; mbodyb = mworld. createbody (BD); mbodyb. createfixture (FD) ;}}/*** create distance joint */private void createdistancejoint () {distancejointdef djd = new distancejointdef (); djd. initialize (mbodya, mbodyb, mbodya. getposition (), mbodyb. getposition (); djd. collideconnected = true; mdistancejoint = (distancejoint) mworld. createjoint (djd) ;}@ overridepublic Boolean keydown (INT keycode) {If (keycode = keys. left) {mbodya. setangularvelocity (2f);} else if (keycode = keys. right) {mbodya. setangularvelocity (-2f);} return false ;}@ overridepublic Boolean keyup (INT keycode) {return false ;}@ overridepublic Boolean keytyped (char character) {return false ;} @ overridepublic Boolean touchdown (INT screenx, int screeny, int pointer, int button) {return false ;}@ overridepublic Boolean touchup (INT screenx, int screeny, int pointer, int button) {return false ;}@ overridepublic Boolean touchdragged (INT screenx, int screeny, int pointer) {return false ;}@ overridepublic Boolean mousemoved (INT screenx, int screeny) {return false ;} @ overridepublic Boolean scrolled (INT amount) {return false ;}}

Box2d example -- demo3 bicycle