If the kinetic energy after impact is the same as before impact, it is an elastic collision. Such a system is an idealization and cannot occur in reality, due to the second law of thermodynamics.ĭeflection happens when an object hits a plane surface. no energy is released as sound, heat, etc.), the collision is said to be perfectly elastic. And if all of the total kinetic energy is conserved (i.e.The sound of the bat hitting the ball represents the loss of energy. An example of this is a baseball bat hitting a baseball - the kinetic energy of the bat is transferred to the ball, greatly increasing the ball's velocity. the objects continue moving afterwards), the collision is said to be elastic. If most of the kinetic energy is conserved (i.e.This is by design, for the safety of the occupants and bystanders should a crash occur - the frame of the car absorbs the energy of the crash instead. An example of such a collision is a car crash, as cars crumple inward when crashing, rather than bouncing off of each other.
Vector 2d line collision full#
or absorbed by the objects themselves), the collision is said to be inelastic such collisions involve objects coming to a full stop. If most or all of the total kinetic energy is lost ( dissipated as heat, sound, etc.In physics, collisions can be classified by the change in the total kinetic energy of the system before and after the collision: A ship collision accurately involves at least two moving maritime vessels hitting each other the related term, allision, describes when a moving ship strikes a stationary object (often, but not always, another ship).A mid-air collision occurs between airplanes.A traffic collision involves at least one automobile.Some colloquial uses of the word collision are the following: When an astronomical object merges with a black hole, they are considered to collide.When a boxer throws a punch, their fist is said to collide with the opponents body.When a cat strides across a lawn, each contact that its paws make with the ground is considered a collision, as well as each brush of its fur against a blade of grass.When an insect lands on a plant's leaf, its legs are said to collide with the leaf.Some examples of physical interactions that scientists would consider collisions are the following:
Although the most common use of the word collision refers to incidents in which two or more objects collide with great force, the scientific use of the term implies nothing about the magnitude of the force. In physics, a collision is any event in which two or more bodies exert forces on each other in a relatively short time. ( July 2022) ( Learn how and when to remove this template message) Please help improve this article if you can. The first examples uses boost::get.This article may require cleanup to meet Wikipedia's quality standards.
Vector 2d line collision manual#
boost::variant comes in as, if there is an intersection, it is either a point or a segment.Īs explained in the boost manual pages for boost::variant, there are two ways to access the variants. The result type can be specified through the placeholder type specifier auto, but you must anyway know that the result type is a boost::optional >, in order to unpack the point or segment.īoost::optional comes in as there might be no intersection. In the first two examples we intersect a segment and a line. The following examples demonstrate the most common use of intersection() functions with the 2D and 3D Linear Kernel.
Note that the return type for Bbox_3 - Bbox_3 is Bbox_3 and not Iso_cuboid_3.
Overloads are also provided for the type Bbox_3, for all intersections existing with the type Iso_cuboid_3. Point_3, or Segment_3, or Triangle_3, or std::vector Īdditional overloads are provided for the type Point_3 combined with any other type with the result type being boost::optional >. Point_3, or Segment_3, or Triangle_3, or std::vector It is equivalent to boost::optional >, the last column in the table providing the template parameter pack. The return type of intersecting two objects of the types Type1 and Type2 can be specified through the placeholder type specifier auto. Note that the return type for Bbox_2 - Bbox_2 is Bbox_2 and not Iso_rectangle_2. Overloads are also provided for the type Bbox_2, for all intersections existing with the type Iso_rectangle_2. Point_2, or Segment_2, or Triangle_2, or std::vectorĪdditional overloads are provided for the type Point_2 combined with any other type with the result type being boost::optional >.
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