Hi, does anyone knwo why the camera shakes when it get closer to the car?
ps: Im using as a base the TestVehicle example…
Thanks… 
package principal;
import java.util.HashMap;
import com.jme.bounding.BoundingBox;
import com.jme.bounding.BoundingSphere;
import com.jme.input.ChaseCamera;
import com.jme.input.InputHandler;
import com.jme.input.KeyInput;
import com.jme.input.action.InputAction;
import com.jme.input.action.InputActionEvent;
import com.jme.input.thirdperson.ThirdPersonMouseLook;
import com.jme.math.FastMath;
import com.jme.math.Vector3f;
import com.jme.renderer.ColorRGBA;
import com.jme.scene.Node;
import com.jme.scene.shape.Box;
import com.jme.scene.shape.Cylinder;
import com.jme.scene.state.MaterialState;
import com.jmex.physics.DynamicPhysicsNode;
import com.jmex.physics.Joint;
import com.jmex.physics.JointAxis;
import com.jmex.physics.StaticPhysicsNode;
import com.jmex.physics.material.Material;
import com.jmex.physics.util.SimplePhysicsGame;
public class Teste extends SimplePhysicsGame {
private ChaseCamera chaser;
private Box carro;
@Override
protected void simpleUpdate() {
super.simpleUpdate();
chaser.update(tpf);
}
private void buildChaseCamera() {
Vector3f targetOffset = new Vector3f();
targetOffset.y = ((BoundingBox) carro.getWorldBound()).yExtent * 3f;
HashMap<String, Object> props = new HashMap<String, Object>();
props.put(ThirdPersonMouseLook.PROP_MAXROLLOUT, "6");
props.put(ThirdPersonMouseLook.PROP_MINROLLOUT, "3");
props.put(ThirdPersonMouseLook.PROP_MAXASCENT, ""+45 * FastMath.DEG_TO_RAD);
props.put(ChaseCamera.PROP_INITIALSPHERECOORDS, new Vector3f(5, 0, 30 * FastMath.DEG_TO_RAD));
props.put(ChaseCamera.PROP_TARGETOFFSET, targetOffset);
chaser = new ChaseCamera(cam, carro, props);
chaser.setMaxDistance(8);
chaser.setMinDistance(2);
}
protected void simpleInitGame() {
gerarChao();
gerarObstaculos();
final DynamicPhysicsNode chassis = getPhysicsSpace()
.createDynamicNode();
carro = new Box("Chassis", Vector3f.ZERO, .5f, 1f, .5f);
carro.setModelBound(new BoundingBox());
carro.updateModelBound();
carro.setLocalTranslation(0f, .7f, 0f);
chassis.attachChild(carro);
chassis.setLocalScale(new Vector3f(1, 0.3f, 1));
chassis.generatePhysicsGeometry();
chassis.setMaterial(Material.IRON);
chassis.setMass(100);
rootNode.attachChild(chassis);
MaterialState roda = display.getRenderer().createMaterialState();
roda.setDiffuse(ColorRGBA.black);
roda.setSpecular(ColorRGBA.gray);
roda.setShininess(10f);
buildChaseCamera();
for (int i = 0; i < 4; i++) {
DynamicPhysicsNode tire = getPhysicsSpace().createDynamicNode();
tire.setMaterial(Material.RUBBER);
Cylinder roda2 = new Cylinder("roda", 10, 25, 1, 1, true);
roda2.setModelBound(new BoundingSphere());
roda2.updateModelBound();
roda2.setRenderState(roda);
tire.attachChild(roda2);
tire.setLocalScale(0.3f);
tire.getLocalTranslation().set((0.5f - (i & 1)), 0,
(1 - (i & 2)) * 0.5f);
tire.generatePhysicsGeometry();
tire.computeMass();
tire.setMass(50);
rootNode.attachChild(tire);
Joint joint = getPhysicsSpace().createJoint();
joint.attach(chassis, tire);
joint.setAnchor(tire.getLocalTranslation());
final JointAxis axis1 = joint.createRotationalAxis();
axis1.setDirection(new Vector3f(0, 1, 0));
if (i == 2 || i == 0) {
axis1.setPositionMinimum(-0.5f);
axis1.setPositionMaximum(0.5f);
} else {
axis1.setPositionMinimum(-0f);
axis1.setPositionMaximum(0f);
}
axis1.setAvailableAcceleration(100);
axis1.setDesiredVelocity(0);
final JointAxis axis2 = joint.createRotationalAxis();
axis2.setDirection(new Vector3f(0, 0, 1));
axis2.setAvailableAcceleration(100);
axis2.setRelativeToSecondObject(true);
if ((i & 1) == 0) {
input.addAction(new SteerAction(axis1, 10),
InputHandler.DEVICE_KEYBOARD, KeyInput.KEY_J,
InputHandler.AXIS_NONE, false);
input.addAction(new SteerAction(axis1, -10),
InputHandler.DEVICE_KEYBOARD, KeyInput.KEY_G,
InputHandler.AXIS_NONE, false);
}
input.addAction(new SteerAction(axis2, 20),
InputHandler.DEVICE_KEYBOARD, KeyInput.KEY_Y,
InputHandler.AXIS_NONE, false);
input.addAction(new SteerAction(axis2, -20),
InputHandler.DEVICE_KEYBOARD, KeyInput.KEY_H,
InputHandler.AXIS_NONE, false);
}
fpsNode.setCullMode(Node.CULL_ALWAYS);
}
private void gerarObstaculos() {
final DynamicPhysicsNode chassis = getPhysicsSpace()
.createDynamicNode();
Box caixa;
caixa = new Box("aaa", Vector3f.ZERO, .5f, 1f, .5f);
caixa.setLocalTranslation(0f, 5f, 0f);
chassis.attachChild(caixa);
chassis.setLocalScale(new Vector3f(1, 0.3f, 1));
chassis.generatePhysicsGeometry();
chassis.setMaterial(Material.IRON);
chassis.setMass(100);
rootNode.attachChild(chassis);
}
private void gerarChao() {
final StaticPhysicsNode staticNode = getPhysicsSpace()
.createStaticNode();
Box chao;
chao = new Box("chao", new Vector3f(0, -1, 0), 50f, .2f, 50f);
MaterialState redgreen = display.getRenderer().createMaterialState();
redgreen.setDiffuse(ColorRGBA.red);
redgreen.setShininess(10f);
chao.setRenderState(redgreen);
staticNode.attachChild(chao);
staticNode.generatePhysicsGeometry();
staticNode.setMaterial(Material.CONCRETE);
rootNode.attachChild(staticNode);
}
public static void main(String[] args) {
Teste app = new Teste();
app.setDialogBehaviour(ALWAYS_SHOW_PROPS_DIALOG);
app.start();
}
private static class SteerAction extends InputAction {
private final JointAxis axis1;
private float velocity;
public SteerAction(JointAxis axis1, float velocity) {
this.axis1 = axis1;
this.velocity = velocity;
}
public void performAction(InputActionEvent evt) {
if (evt.getTriggerPressed()) {
axis1.setDesiredVelocity(velocity);
} else {
axis1.setDesiredVelocity(0);
}
}
}
}