Function b2CreateShapeInternal

external/box2d/Box2D/src/shape.c:59–161

}

static b2Shape* b2CreateShapeInternal( b2World* world, b2Body* body, b2Transform transform, const b2ShapeDef* def,
									   const void* geometry, b2ShapeType shapeType )
{
	int shapeId = b2AllocId( &world->shapeIdPool );

	if ( shapeId == world->shapes.count )
	{
		b2ShapeArray_Push( &world->shapes, ( b2Shape ){ 0 } );
	}
	else
	{
		B2_ASSERT( world->shapes.data[shapeId].id == B2_NULL_INDEX );
	}

	b2Shape* shape = b2ShapeArray_Get( &world->shapes, shapeId );

	switch ( shapeType )
	{
		case b2_capsuleShape:
			shape->capsule = *(const b2Capsule*)geometry;
			break;

		case b2_circleShape:
			shape->circle = *(const b2Circle*)geometry;
			break;

		case b2_polygonShape:
			shape->polygon = *(const b2Polygon*)geometry;
			break;

		case b2_segmentShape:
			shape->segment = *(const b2Segment*)geometry;
			break;

		case b2_chainSegmentShape:
			shape->chainSegment = *(const b2ChainSegment*)geometry;
			break;

		default:
			B2_ASSERT( false );
			break;
	}

	shape->id = shapeId;
	shape->bodyId = body->id;
	shape->type = shapeType;
	shape->density = def->density;
	shape->friction = def->material.friction;
	shape->restitution = def->material.restitution;
	shape->rollingResistance = def->material.rollingResistance;
	shape->tangentSpeed = def->material.tangentSpeed;
	shape->userMaterialId = def->material.userMaterialId;
	shape->filter = def->filter;
	shape->userData = def->userData;
	shape->customColor = def->material.customColor;
	shape->enlargedAABB = false;
	shape->enableSensorEvents = def->enableSensorEvents;
	shape->enableContactEvents = def->enableContactEvents;