Collision objects
Description
Collaboration diagram for Collision objects:
Classes | |
| class | chrono::collision::ChCAABBGenerator |
| Generator for Axis-Aligned Bounding Boxes. More... | |
| class | chrono::collision::ChCBroadphase |
| Class for performing broad-phase collision detection. More... | |
| class | chrono::collision::ChCNarrowphaseDispatch |
| Class for performing narrow-phase collision detection. More... | |
| struct | chrono::collision::ConvexModel |
| Class to encapsulate description of a convex collision shape. More... | |
| class | chrono::collision::ChCollisionModelParallel |
| Class for geometric model for collision detection. More... | |
| class | chrono::collision::ChCollisionSystemBulletParallel |
| Class for collision engine based on the spatial subdivision method. More... | |
| class | chrono::collision::ChCollisionSystemParallel |
| Class for collision engine based on the spatial subdivision method. More... | |
| class | chrono::ChContactContainerParallel |
| Class representing a container of many contacts, implemented as a linked list of contact tuples. More... | |
| class | chrono::collision::ConvexBase |
| Base class for convex contact shapes. More... | |
| class | chrono::collision::ConvexShape |
| Convex contact shape. More... | |
| class | chrono::collision::ConvexShapeSphere |
| Sphere contact shape. More... | |
| class | chrono::collision::ConvexShapeCustom |
| Custom contact shape. More... | |
| class | chrono::collision::ConvexShapeTetrahedron |
| Tetrahedron contact shape. More... | |
| class | chrono::collision::ConvexShapeTriangle |
| Triangle contact shape. More... | |
Functions | |
| template<class T > | |
| vec3 | chrono::collision::HashMin (const T &A, const real3 &inv_bin_size_vec) |
| Convert a position into a bin index ("lower" corner). | |
| template<class T > | |
| vec3 | chrono::collision::HashMax (const T &A, const real3 &inv_bin_size_vec) |
| Convert a position into a bin index ("upper" corner). | |
| CH_PARALLEL_API bool | chrono::collision::MPRContact (const ConvexBase *ShapeA, const ConvexBase *ShapeB, const real &envelope, real3 &returnNormal, real3 &point, real &depth) |
| CH_PARALLEL_API bool | chrono::collision::MPRCollision (const ConvexBase *ShapeA, const ConvexBase *ShapeB, real envelope, real3 &returnNormal, real3 &pointA, real3 &pointB, real &depth) |
| CH_PARALLEL_API void | chrono::collision::MPRGetPoints (const ConvexBase *ShapeA, const ConvexBase *ShapeB, const real &envelope, real3 &N, real3 p0, real3 &p1, real3 &p2) |
| CH_PARALLEL_API bool | chrono::collision::MPRSphereSphere (const ConvexBase *ShapeA, const ConvexBase *ShapeB, real3 &N, real &dist, real3 &p1, real3 &p2) |
| bool | chrono::collision::sphere_sphere (const real3 &pos1, const real &radius1, const real3 &pos2, const real &radius2, const real &separation, real3 &norm, real &depth, real3 &pt1, real3 &pt2, real &eff_radius) |
| Analytical sphere vs. sphere collision function. | |
| bool | chrono::collision::capsule_sphere (const real3 &pos1, const quaternion &rot1, const real &radius1, const real &hlen1, const real3 &pos2, const real &radius2, const real &separation, real3 &norm, real &depth, real3 &pt1, real3 &pt2, real &eff_radius) |
| Analytical capsule vs. sphere collision function. | |
| bool | chrono::collision::cylinder_sphere (const real3 &pos1, const quaternion &rot1, const real &radius1, const real &hlen1, const real3 &pos2, const real &radius2, const real &separation, real3 &norm, real &depth, real3 &pt1, real3 &pt2, real &eff_radius) |
| Analytical cylinder vs. sphere collision function. | |
| bool | chrono::collision::roundedcyl_sphere (const real3 &pos1, const quaternion &rot1, const real &radius1, const real &hlen1, const real &srad1, const real3 &pos2, const real &radius2, const real &separation, real3 &norm, real &depth, real3 &pt1, real3 &pt2, real &eff_radius) |
| Analytical rounded cylinder vs. sphere collision function. | |
| bool | chrono::collision::box_sphere (const real3 &pos1, const quaternion &rot1, const real3 &hdims1, const real3 &pos2, const real &radius2, const real &separation, real3 &norm, real &depth, real3 &pt1, real3 &pt2, real &eff_radius) |
| Analytical box vs. sphere collision function. | |
| bool | chrono::collision::roundedbox_sphere (const real3 &pos1, const quaternion &rot1, const real3 &hdims1, const real &srad1, const real3 &pos2, const real &radius2, const real &separation, real3 &norm, real &depth, real3 &pt1, real3 &pt2, real &eff_radius) |
| Analytical rounded box vs. sphere collision function. | |
| bool | chrono::collision::face_sphere (const real3 &A1, const real3 &B1, const real3 &C1, const real3 &pos2, const real &radius2, const real &separation, real3 &norm, real &depth, real3 &pt1, real3 &pt2, real &eff_radius) |
| Analytical triangle face vs. sphere collision function. | |
| int | chrono::collision::capsule_capsule (const real3 &pos1, const quaternion &rot1, const real &radius1, const real &hlen1, const real3 &pos2, const quaternion &rot2, const real &radius2, const real &hlen2, const real &separation, real3 *norm, real *depth, real3 *pt1, real3 *pt2, real *eff_radius) |
| Analytical capsule vs. capsule collision function. | |
| int | chrono::collision::box_capsule (const real3 &pos1, const quaternion &rot1, const real3 &hdims1, const real3 &pos2, const quaternion &rot2, const real &radius2, const real &hlen2, const real &separation, real3 *norm, real *depth, real3 *pt1, real3 *pt2, real *eff_radius) |
| Analytical box vs. capsule collision function. | |
| int | chrono::collision::box_box (const real3 &pos1, const quaternion &rot1, const real3 &hdims1, const real3 &pos2, const quaternion &rot2, const real3 &hdims2, real3 *norm, real *depth, real3 *pt1, real3 *pt2, real *eff_radius) |
| Analytical box vs. box collision function (not yet completed). | |
| bool | chrono::collision::RCollision (const ConvexBase *shapeA, const ConvexBase *shapeB, real separation, real3 *ct_norm, real3 *ct_pt1, real3 *ct_pt2, real *ct_depth, real *ct_eff_rad, int &nC) |
| Dispatcher for analytic collision functions. More... | |
| void | chrono::collision::SetDefaultEdgeRadius (real radius) |
| Set the fictitious radius of curvature used for collision with a corner or an edge. | |
| real | chrono::collision::GetDefaultEdgeRadius () |
| Return the fictitious radius of curvature used for collisions with a corner or an edge. | |
| real3 | chrono::collision::face_normal (const real3 &A, const real3 &B, const real3 &C) |
| This utility function returns the normal to the triangular face defined by the vertices A, B, and C. More... | |
| bool | chrono::collision::snap_to_face (const real3 &A, const real3 &B, const real3 &C, const real3 &P, real3 &res) |
| This utility function takes the location 'P' and snaps it to the closest point on the triangular face with given vertices (A, B, and C). More... | |
| uint | chrono::collision::snap_to_cylinder (const real &rad, const real &hlen, real3 &loc) |
| This utility function snaps the specified location to a point on a cylinder with given radius and half-length. More... | |
| uint | chrono::collision::snap_to_box (const real3 &hdims, real3 &loc) |
| This utility function snaps the specified location to a point on a box with given half-dimensions. More... | |
| real3 | chrono::collision::box_farthest_corner (const real3 &hdims, const real3 &dir) |
| This utility function returns the corner of a box of given dimensions that if farthest in the direction 'dir', which is assumed to be given in the frame of the box. | |
| real3 | chrono::collision::box_closest_corner (const real3 &hdims, const real3 &dir) |
| This utility function returns the corner of a box of given dimensions that if closest in the direction 'dir', which is assumed to be given in the frame of the box. | |
| uint | chrono::collision::box_closest_feature (const real3 &dir) |
| This utility function returns a code that indicates the closest feature of a box in the specified direction. More... | |
| bool | chrono::collision::box_intersects_box (const real3 &hdims1, const real3 &hdims2, const real3 &pos, const quaternion &rot, real3 &dir) |
| This function returns a boolean indicating whether or not a box1 with dimensions hdims1 intersects a second box with the dimensions hdims2. More... | |
| real3 | chrono::collision::GetSupportPoint_Sphere (const real &radius, const real3 &n) |
| Support point for a sphere (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Triangle (const real3 *t, const real3 &n) |
| Support point for a triangle (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Box (const real3 &B, const real3 &n) |
| Support point for a box (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Ellipsoid (const real3 &B, const real3 &n) |
| Support point for an ellipsoid (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Cylinder (const real3 &B, const real3 &n) |
| Support point for a cylinder (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Plane (const real3 &B, const real3 &n) |
| Support point for a plane (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Cone (const real3 &B, const real3 &n) |
| Support point for a cone (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Seg (const real B, const real3 &n) |
| Support point for a line segment (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Capsule (const real2 &B, const real3 &n) |
| Support point for a capsule (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Disk (const real &B, const real3 &n) |
| Support point for a disk (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Rect (const real3 &B, const real3 &n) |
| Support point for a rectangle (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_RoundedBox (const real4 &B, const real3 &n) |
| Support point for a rounded box, i.e. a sphere-swept box (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_RoundedCylinder (const real4 &B, const real3 &n) |
| Support point for a rounded cylinder, i.e. a sphere-swept cylinder (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_RoundedCone (const real4 &B, const real3 &n) |
| Support point for a rounded cone, i.e. a sphere-swept cone (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Convex (const int size, const real3 *convex_data, const real3 &n) |
| Support point for a gneric convex sphae (for GJK and MPR). | |
| real3 | chrono::collision::GetSupportPoint_Tetrahedron (const uvec4 indices, const real3 *nodes, const real3 &n) |
| Support point for a tetrahedron (for GJK and MPR). | |
| real3 | chrono::collision::GetCenter_Sphere () |
| real3 | chrono::collision::GetCenter_Triangle (const real3 *t) |
| real3 | chrono::collision::GetCenter_Box () |
| real3 | chrono::collision::GetCenter_Ellipsoid () |
| real3 | chrono::collision::GetCenter_Cylinder () |
| real3 | chrono::collision::GetCenter_Plane () |
| real3 | chrono::collision::GetCenter_Cone (const real3 &B) |
| real3 | chrono::collision::GetCenter_Convex (const int size, const real3 *convex_data) |
| real3 | chrono::collision::GetCenter_Tetrahedron (const uvec4 indices, const real3 *nodes) |
| real3 | chrono::collision::SupportVertNoMargin (const chrono::collision::ConvexBase *Shape, const real3 &nv, const real &envelope) |
| real3 | chrono::collision::LocalSupportVert (const chrono::collision::ConvexBase *Shape, const real3 &n, const real &envelope) |
| real3 | chrono::collision::TransformSupportVert (const chrono::collision::ConvexBase *Shape, const real3 &n, const real &envelope) |
Function Documentation
◆ box_closest_feature()
| uint chrono::collision::box_closest_feature | ( | const real3 & | dir | ) |
This utility function returns a code that indicates the closest feature of a box in the specified direction.
The direction 'dir' is assumed to be given in the frame of the box. The return code encodes the box axes that define the closest feature:
- first bit (least significant) corresponds to x-axis
- second bit corresponds to y-axis
- third bit corresponds to z-axis
Therefore: code = 0 indicates a degenerate direction (within a threshold) code = 1 or code = 2 or code = 4 indicates a face code = 3 or code = 5 or code = 6 indicates an edge code = 7 indicates a corner
◆ box_intersects_box()
| bool chrono::collision::box_intersects_box | ( | const real3 & | hdims1, |
| const real3 & | hdims2, | ||
| const real3 & | pos, | ||
| const quaternion & | rot, | ||
| real3 & | dir | ||
| ) |
This function returns a boolean indicating whether or not a box1 with dimensions hdims1 intersects a second box with the dimensions hdims2.
The check is performed in the local frame of box1. The transform from the other box is given through 'pos' and 'rot'. If an intersection exists, the direction of smallest intersection is returned in 'dir'.
This check is performed by testing 15 possible separating planes between the two boxes (Gottschalk, Lin, Manocha - Siggraph96).
◆ face_normal()
This utility function returns the normal to the triangular face defined by the vertices A, B, and C.
The face is assumed to be non-degenerate. Note that order of vertices is important!
◆ RCollision()
| CH_PARALLEL_API bool chrono::collision::RCollision | ( | const ConvexBase * | shapeA, |
| const ConvexBase * | shapeB, | ||
| real | separation, | ||
| real3 * | ct_norm, | ||
| real3 * | ct_pt1, | ||
| real3 * | ct_pt2, | ||
| real * | ct_depth, | ||
| real * | ct_eff_rad, | ||
| int & | nC | ||
| ) |
Dispatcher for analytic collision functions.
- Parameters
-
shapeA first candidate shape shapeB second candidate shape separation maximum separation [out] ct_norm contact normal (per contact pair) [out] ct_pt1 point on shape1 (per contact pair) [out] ct_pt2 point on shape2 (per contact pair) [out] ct_depth penetration depth (per contact pair) [out] ct_eff_rad effective contact radius (per contact pair) [out] nC number of contacts found
◆ snap_to_box()
This utility function snaps the specified location to a point on a box with given half-dimensions.
The in/out location is assumed to be specified in the frame of the box (which is therefore assumed to be an AABB centered at the origin). The return code indicates the box axes that caused snapping.
- first bit (least significant) corresponds to x-axis
- second bit corresponds to y-axis
- third bit corresponds to z-axis
Therefore: code = 0 indicates an interior point code = 1 or code = 2 or code = 4 indicates snapping to a face code = 3 or code = 5 or code = 6 indicates snapping to an edge code = 7 indicates snapping to a corner
◆ snap_to_cylinder()
| uint chrono::collision::snap_to_cylinder | ( | const real & | rad, |
| const real & | hlen, | ||
| real3 & | loc | ||
| ) |
This utility function snaps the specified location to a point on a cylinder with given radius and half-length.
The in/out location is assumed to be specified in the frame of the cylinder (in this frame the cylinder is assumed to be centered at the origin and aligned with the Y axis). The return code indicates the feature of the cylinder that caused snapping. code = 0 indicates and interior point code = 1 indicates snapping to one of the cylinder caps code = 2 indicates snapping to the cylinder side code = 3 indicates snapping to one of the cylinder edges
◆ snap_to_face()
| bool chrono::collision::snap_to_face | ( | const real3 & | A, |
| const real3 & | B, | ||
| const real3 & | C, | ||
| const real3 & | P, | ||
| real3 & | res | ||
| ) |
This utility function takes the location 'P' and snaps it to the closest point on the triangular face with given vertices (A, B, and C).
The result is returned in 'res'. Both 'P' and 'res' are assumed to be specified in the same frame as the face vertices. This function returns 'true' if the result is on an edge of this face and 'false' if the result is inside the triangle. Code from Ericson, "Real-time collision detection", 2005, pp. 141
