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adding some documentation about the VerletShapes

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This commit is contained in:
Andrew Meadows 2014-06-18 14:17:12 -07:00
parent 96eebec0fc
commit 3791b4712b
2 changed files with 22 additions and 5 deletions
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20
libraries/shared/src/VerletCapsuleShape.h
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@ -15,11 +15,23 @@
#include "CapsuleShape.h"
// The VerletCapsuleShape is similar to a regular CapsuleShape, except it keeps pointers
// to its endpoints which are owned by some other data structure. This allows it to
// participate in a verlet integration engine.
// The VerletCapsuleShape is similar to a regular CapsuleShape, except it keeps a pointer
// to its endpoints which are owned by some other data structure (a verlet simulation system).
// This makes it easier for the points to be moved around by constraints in the system
// as well as collisions with the shape, however it has some drawbacks:
//
// Although the true_halfHeight of the VerletCapsuleShape is considered a constant
// (1) The Shape::_translation and ::_rotation data members are not used (wasted)
//
// (2) A VerletShape doesn't own the points that it uses, so you must be careful not to
// leave dangling pointers around.
//
// (3) Some const methods of VerletCapsuleShape are much more expensive than you might think.
// For example getHalfHeight() and setHalfHeight() methods must do extra computation. In
// particular setRotation() is significantly more expensive than for the CapsuleShape.
// Not too expensive to use when setting up shapes, but you woudln't want to use it deep
// down in a hot simulation loop, such as when processing collision results. Best to
// just let the verlet simulation do its thing and not try to constantly force a rotation.
class VerletCapsuleShape : public CapsuleShape {
public:
VerletCapsuleShape(glm::vec3* startPoint, glm::vec3* endPoint);

7
libraries/shared/src/VerletSphereShape.h
View file

@ -17,8 +17,13 @@
// The VerletSphereShape is similar to a regular SphereShape, except it keeps a pointer
// to its center which is owned by some other data structure (a verlet simulation system).
// This makes it easier for the points to be moved around by constraints in the system
// as well as collisions with the shape.
// as well as collisions with the shape, however it has some drawbacks:
//
// (1) The Shape::_translation data member is not used (wasted)
//
// (2) A VerletShape doesn't own the points that it uses, so you must be careful not to
// leave dangling pointers around.
class VerletSphereShape : public SphereShape {
public:
VerletSphereShape(glm::vec3* centerPoint);