public static float getYRotationAngle(GVRSceneObject rotatingObject, GVRCameraRig targetObject) {
return (float)
Math.toDegrees(
Math.atan2(
targetObject.getTransform().getPositionX()
- rotatingObject.getTransform().getPositionX(),
targetObject.getTransform().getPositionZ()
- rotatingObject.getTransform().getPositionZ()));
}
public static double distance(GVRSceneObject object, GVRCameraRig gvrCameraRig) {
return Math.sqrt(
Math.pow(
object.getTransform().getPositionX() - gvrCameraRig.getTransform().getPositionX(),
2)
+ Math.pow(
object.getTransform().getPositionY() - gvrCameraRig.getTransform().getPositionY(),
2)
+ Math.pow(
object.getTransform().getPositionZ() - gvrCameraRig.getTransform().getPositionZ(),
2));
}
public static float[] calculatePointBetweenTwoObjects(
GVRSceneObject object, GVRCameraRig gvrCameraRig, float desiredDistance) {
float[] point = new float[3];
float ratio = desiredDistance / (float) distance(object, gvrCameraRig);
point[0] =
(1 - ratio) * gvrCameraRig.getTransform().getPositionX()
+ (ratio) * object.getTransform().getPositionX();
point[1] =
(1 - ratio) * gvrCameraRig.getTransform().getPositionY()
+ (ratio) * object.getTransform().getPositionY();
point[2] =
(1 - ratio) * gvrCameraRig.getTransform().getPositionZ()
+ (ratio) * object.getTransform().getPositionZ();
return point;
}
@Override
public void onInit(GVRContext gvrContext) throws IOException {
mAnimationEngine = gvrContext.getAnimationEngine();
mMainScene =
gvrContext.getNextMainScene(
new Runnable() {
@Override
public void run() {
for (GVRAnimation animation : mAnimations) {
animation.start(mAnimationEngine);
}
mAnimations = null;
}
});
// Apply frustum culling
mMainScene.setFrustumCulling(true);
GVRCameraRig mainCameraRig = mMainScene.getMainCameraRig();
mainCameraRig.getLeftCamera().setBackgroundColor(Color.BLACK);
mainCameraRig.getRightCamera().setBackgroundColor(Color.BLACK);
mainCameraRig.getTransform().setPosition(0.0f, 0.0f, 0.0f);
// Model with texture
GVRSceneObject astroBoyModel = gvrContext.getAssimpModel("astro_boy.dae");
// Model with color
GVRSceneObject benchModel = gvrContext.getAssimpModel("bench.dae");
ModelPosition astroBoyModelPosition = new ModelPosition();
astroBoyModelPosition.setPosition(0.0f, -0.4f, -0.5f);
astroBoyModel.getTransform().setScale(3, 3, 3);
astroBoyModel
.getTransform()
.setPosition(astroBoyModelPosition.x, astroBoyModelPosition.y, astroBoyModelPosition.z);
astroBoyModel.getTransform().setRotationByAxis(180.0f, 0.0f, 1.0f, 0.0f);
ModelPosition benchModelPosition = new ModelPosition();
benchModelPosition.setPosition(0.0f, -4.0f, -30.0f);
benchModel
.getTransform()
.setPosition(benchModelPosition.x, benchModelPosition.y, benchModelPosition.z);
benchModel.getTransform().setRotationByAxis(180.0f, 0.0f, 1.0f, 0.0f);
mMainScene.addSceneObject(astroBoyModel);
mMainScene.addSceneObject(benchModel);
rotateModel(astroBoyModel, 10f, astroBoyModelPosition);
}