dchip.chipmunk

Undocumented in source.

Members

Aliases

cpcalloc alias cpcalloc = calloc: Chipmunk calloc() alias.
cpfree alias cpfree = free: Chipmunk free() alias.
cprealloc alias cprealloc = realloc: Chipmunk realloc() alias.

Classes

DChipError class DChipError: Throw when an internal library condition is unsatisfied. Continuing the use of the library after this error is thrown will lead to undefined behavior.

Functions

QHullPartition int QHullPartition(cpVect* verts, int count, cpVect a, cpVect b, cpFloat tol): Undocumented in source. Be warned that the author may not have intended to support it.
QHullReduce int QHullReduce(cpFloat tol, cpVect* verts, int count, cpVect a, cpVect pivot, cpVect b, cpVect* result): Undocumented in source. Be warned that the author may not have intended to support it.
SWAP void SWAP(cpVect a, cpVect b): Avoid bringing in std.algorithm.
cpAreaForCircle cpFloat cpAreaForCircle(cpFloat r1, cpFloat r2): Calculate area of a hollow circle. @c r1 and @c r2 are the inner and outer diameters. A solid circle has an inner diameter of 0.
cpAreaForPoly cpFloat cpAreaForPoly(int numVerts, cpVect* verts): Calculate the signed area of a polygon. A Clockwise winding gives positive area. This is probably backwards from what you expect, but matches Chipmunk's the winding for poly shapes.
cpAreaForSegment cpFloat cpAreaForSegment(cpVect a, cpVect b, cpFloat r): Calculate the area of a fattened (capsule shaped) line segment.
cpAssertHard void cpAssertHard(E condition, string expr, Args args): Throw a DChipError if condition is false.
cpAssertSoft void cpAssertSoft(E condition, string expr, Args args): If the CHIP_ENABLE_WARNINGS version is set, throw a DChipError if condition is false.
cpAssertWarn void cpAssertWarn(E condition, string expr, Args args): If the CHIP_ENABLE_WARNINGS version is set, print a warning to stderr if condition is false.
cpCentroidForPoly cpVect cpCentroidForPoly(int numVerts, cpVect* verts): Calculate the natural centroid of a polygon.
cpConvexHull int cpConvexHull(int count, cpVect* verts, cpVect* result, int* first, cpFloat tol): Calculate the convex hull of a given set of points. Returns the count of points in the hull. @c result must be a pointer to a @c cpVect array with at least @c count elements. If @c result is @c NULL, then @c verts will be reduced instead. @c first is an optional pointer to an integer to store where the first vertex in the hull came from (i.e. vertsfirst == result[0]) @c tol is the allowed amount to shrink the hull when simplifying it. A tolerance of 0.0 creates an exact hull. QuickHull seemed like a neat algorithm, and efficient-ish for large input sets. My implementation performs an in place reduction using the result array as scratch space.
cpInitChipmunk deprecated void cpInitChipmunk(): @deprecated
cpLoopIndexes void cpLoopIndexes(cpVect* verts, int count, int* start, int* end): Undocumented in source. Be warned that the author may not have intended to support it.
cpMomentForBox cpFloat cpMomentForBox(cpFloat m, cpFloat width, cpFloat height): Calculate the moment of inertia for a solid box.
cpMomentForBox2 cpFloat cpMomentForBox2(cpFloat m, cpBB box): Calculate the moment of inertia for a solid box.
cpMomentForCircle cpFloat cpMomentForCircle(cpFloat m, cpFloat r1, cpFloat r2, cpVect offset): Calculate the moment of inertia for a circle. @c r1 and @c r2 are the inner and outer diameters. A solid circle has an inner diameter of 0.
cpMomentForPoly cpFloat cpMomentForPoly(cpFloat m, int numVerts, cpVect* verts, cpVect offset): Calculate the moment of inertia for a solid polygon shape assuming it's center of gravity is at it's centroid. The offset is added to each vertex.
cpMomentForSegment cpFloat cpMomentForSegment(cpFloat m, cpVect a, cpVect b): Calculate the moment of inertia for a line segment. Beveling radius is not supported.
cpRecenterPoly void cpRecenterPoly(int numVerts, cpVect* verts): Center the polygon on the origin. (Subtracts the centroid of the polygon from each vertex)

Manifest constants

CP_BUFFER_BYTES enum CP_BUFFER_BYTES;: Allocated size for various Chipmunk buffers.
CP_VERSION_MAJOR enum CP_VERSION_MAJOR;: Chipmunk 6.2.1
CP_VERSION_MINOR enum CP_VERSION_MINOR;: Undocumented in source.
CP_VERSION_RELEASE enum CP_VERSION_RELEASE;: Undocumented in source.
cpVersionString enum cpVersionString;: Version string.

dchip.chipmunk

Members

Aliases

Classes

Functions

Manifest constants

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