/**
* Get the relative size of a prop.
*
* @param spatial which prop (not null)
* @return the prop's size relative to standard (>0)
*/
public float getRelativeSize(Spatial spatial) {
assert spatial != null;
float result = spatial.getWorldScale().x;
result *= scene.getScaleFactor();
return result;
}
/**
* Generate a collision shape for a prop.
*
* @param propType the type of the prop (not null)
* @param relativeSize the prop's size relative to standard (>0)
* @param parts (not null)
* @return a new instance
*/
private CollisionShape createShape(String propType, float relativeSize, List<Spatial> parts) {
assert propType != null;
assert relativeSize > 0f : relativeSize;
assert parts != null;
assert !parts.isEmpty();
if ("barrel".equals(propType)) {
/*
* Generate a cylindrical shape aligned with the Y-axis.
*/
float halfHeight = 0.5f * relativeSize; // meters
float radius = 0.472f * relativeSize; // meters
Vector3f halfExtents = new Vector3f(radius, halfHeight, radius);
float scaleFactor = scene.getScaleFactor();
halfExtents.divideLocal(scaleFactor);
CollisionShape shape = new CylinderCollisionShape(halfExtents, PhysicsSpace.AXIS_Y);
return shape;
}
/*
* Generate a compound shape composed of GImpact shapes,
* one for each geometry.
*/
CompoundCollisionShape shape = new CompoundCollisionShape();
for (Spatial part : parts) {
Geometry geometry = (Geometry) part;
Mesh mesh = geometry.getMesh();
CollisionShape partShape = new GImpactCollisionShape(mesh);
Vector3f scale = part.getWorldScale();
partShape.setScale(scale);
shape.addChildShape(partShape, Vector3f.ZERO);
}
return shape;
}
/**
* Duplicate a prop. Duplicating differs from cloning because the duplicate gets a unique name and
* any descendants of the duplicate get renamed to match. Besides, cloning doesn't work well on
* physics controls.
*
* @param originalProp which prop to duplicate (not null)
* @return the new prop
*/
public Node duplicate(Spatial originalProp) {
String name = originalProp.getName();
logger.log(Level.INFO, "duplicating prop {0}", MyString.quote(name));
String propType = SpatialProperties.getPrefixType(originalProp);
float relativeSize = originalProp.getWorldScale().x;
Vector3f centerLocation = MySpatial.getWorldLocation(originalProp);
Quaternion orientation = MySpatial.getWorldOrientation(originalProp);
Node result = add(propType, relativeSize, centerLocation, orientation);
return result;
}