367 lines
9.7 KiB
C++
367 lines
9.7 KiB
C++
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#ifndef __DSC_H
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#define __DSC_H
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typedef unsigned long DWORD;
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typedef unsigned char BYTE;
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class Vector;
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class Vector4;
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class Point2d;
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class hEntity;
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class hParam;
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class Quaternion {
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public:
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// a + (vx)*i + (vy)*j + (vz)*k
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double w, vx, vy, vz;
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static const Quaternion IDENTITY;
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static Quaternion From(double w, double vx, double vy, double vz);
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static Quaternion From(hParam w, hParam vx, hParam vy, hParam vz);
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static Quaternion From(Vector u, Vector v);
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static Quaternion From(Vector axis, double dtheta);
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Quaternion Plus(Quaternion b);
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Quaternion Minus(Quaternion b);
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Quaternion ScaledBy(double s);
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double Magnitude(void);
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Quaternion WithMagnitude(double s);
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// Call a rotation matrix [ u' v' n' ]'; this returns the first and
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// second rows, where that matrix is generated by this quaternion
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Vector RotationU(void);
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Vector RotationV(void);
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Vector RotationN(void);
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Vector Rotate(Vector p);
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Quaternion ToThe(double p);
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Quaternion Inverse(void);
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Quaternion Times(Quaternion b);
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};
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class Vector {
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public:
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double x, y, z;
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static Vector From(double x, double y, double z);
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static Vector From(hParam x, hParam y, hParam z);
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static Vector AtIntersectionOfPlanes(Vector n1, double d1,
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Vector n2, double d2);
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static Vector AtIntersectionOfLines(Vector a0, Vector a1,
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Vector b0, Vector b1,
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bool *skew,
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double *pa=NULL, double *pb=NULL);
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static Vector AtIntersectionOfPlaneAndLine(Vector n, double d,
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Vector p0, Vector p1,
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bool *parallel);
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static Vector AtIntersectionOfPlanes(Vector na, double da,
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Vector nb, double db,
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Vector nc, double dc, bool *parallel);
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static void ClosestPointBetweenLines(Vector pa, Vector da,
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Vector pb, Vector db,
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double *ta, double *tb);
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double Element(int i);
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bool Equals(Vector v, double tol=LENGTH_EPS);
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bool EqualsExactly(Vector v);
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Vector Plus(Vector b);
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Vector Minus(Vector b);
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Vector Negated(void);
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Vector Cross(Vector b);
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double DirectionCosineWith(Vector b);
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double Dot(Vector b);
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Vector Normal(int which);
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Vector RotatedAbout(Vector orig, Vector axis, double theta);
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Vector RotatedAbout(Vector axis, double theta);
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Vector DotInToCsys(Vector u, Vector v, Vector n);
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Vector ScaleOutOfCsys(Vector u, Vector v, Vector n);
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double DistanceToLine(Vector p0, Vector dp);
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bool OnLineSegment(Vector a, Vector b, double tol=LENGTH_EPS);
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Vector ClosestPointOnLine(Vector p0, Vector dp);
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double Magnitude(void);
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double MagSquared(void);
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Vector WithMagnitude(double s);
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Vector ScaledBy(double s);
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Vector ProjectInto(hEntity wrkpl);
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Vector ProjectVectorInto(hEntity wrkpl);
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double DivPivoting(Vector delta);
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Vector ClosestOrtho(void);
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void MakeMaxMin(Vector *maxv, Vector *minv);
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static bool BoundingBoxesDisjoint(Vector amax, Vector amin,
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Vector bmax, Vector bmin);
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static bool BoundingBoxIntersectsLine(Vector amax, Vector amin,
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Vector p0, Vector p1, bool segment);
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bool OutsideAndNotOn(Vector maxv, Vector minv);
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Vector InPerspective(Vector u, Vector v, Vector n,
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Vector origin, double cameraTan);
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Point2d Project2d(Vector u, Vector v);
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Point2d ProjectXy(void);
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Vector4 Project4d(void);
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};
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class Vector4 {
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public:
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double w, x, y, z;
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static Vector4 From(double w, double x, double y, double z);
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static Vector4 From(double w, Vector v3);
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static Vector4 Blend(Vector4 a, Vector4 b, double t);
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Vector4 Plus(Vector4 b);
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Vector4 Minus(Vector4 b);
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Vector4 ScaledBy(double s);
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Vector PerspectiveProject(void);
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};
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class Point2d {
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public:
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double x, y;
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static Point2d From(double x, double y);
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Point2d Plus(Point2d b);
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Point2d Minus(Point2d b);
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Point2d ScaledBy(double s);
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double DivPivoting(Point2d delta);
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double Dot(Point2d p);
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double DistanceTo(Point2d p);
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double DistanceToLine(Point2d p0, Point2d dp, bool segment);
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double Magnitude(void);
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double MagSquared(void);
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Point2d WithMagnitude(double v);
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Point2d Normal(void);
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bool Equals(Point2d v, double tol=LENGTH_EPS);
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};
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// A simple list
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template <class T>
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class List {
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public:
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T *elem;
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int n;
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int elemsAllocated;
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void AllocForOneMore(void) {
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if(n >= elemsAllocated) {
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elemsAllocated = (elemsAllocated + 32)*2;
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elem = (T *)MemRealloc(elem, elemsAllocated*sizeof(elem[0]));
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}
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}
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void Add(T *t) {
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AllocForOneMore();
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elem[n++] = *t;
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}
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void AddToBeginning(T *t) {
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AllocForOneMore();
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memmove(elem+1, elem, n*sizeof(elem[0]));
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n++;
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elem[0] = *t;
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}
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T *First(void) {
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return (n == 0) ? NULL : &(elem[0]);
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}
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T *NextAfter(T *prev) {
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if(!prev) return NULL;
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if(prev - elem == (n - 1)) return NULL;
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return prev + 1;
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}
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void ClearTags(void) {
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int i;
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for(i = 0; i < n; i++) {
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elem[i].tag = 0;
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}
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}
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void Clear(void) {
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if(elem) MemFree(elem);
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elem = NULL;
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n = elemsAllocated = 0;
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}
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void RemoveTagged(void) {
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int src, dest;
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dest = 0;
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for(src = 0; src < n; src++) {
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if(elem[src].tag) {
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// this item should be deleted
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} else {
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if(src != dest) {
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elem[dest] = elem[src];
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}
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dest++;
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}
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}
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n = dest;
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// and elemsAllocated is untouched, because we didn't resize
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}
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void Reverse(void) {
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int i;
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for(i = 0; i < (n/2); i++) {
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SWAP(T, elem[i], elem[(n-1)-i]);
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}
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}
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};
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// A list, where each element has an integer identifier. The list is kept
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// sorted by that identifier, and items can be looked up in log n time by
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// id.
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template <class T, class H>
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class IdList {
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public:
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T *elem;
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int n;
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int elemsAllocated;
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H AddAndAssignId(T *t) {
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int i;
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DWORD id = 0;
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for(i = 0; i < n; i++) {
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id = max(id, elem[i].h.v);
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}
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t->h.v = (id + 1);
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Add(t);
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return t->h;
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}
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void Add(T *t) {
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if(n >= elemsAllocated) {
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elemsAllocated = (elemsAllocated + 32)*2;
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elem = (T *)MemRealloc(elem, elemsAllocated*sizeof(elem[0]));
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}
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int first = 0, last = n;
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// We know that we must insert within the closed interval [first,last]
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while(first != last) {
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int mid = (first + last)/2;
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H hm = elem[mid].h;
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if(hm.v > t->h.v) {
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last = mid;
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} else if(hm.v < t->h.v) {
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first = mid + 1;
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} else {
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dbp("can't insert in list; is handle %d not unique?", t->h.v);
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oops();
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}
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}
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int i = first;
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memmove(elem+i+1, elem+i, (n-i)*sizeof(elem[0]));
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elem[i] = *t;
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n++;
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}
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T *FindById(H h) {
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T *t = FindByIdNoOops(h);
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if(!t) {
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dbp("failed to look up item %08x, searched %d items", h.v, n);
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oops();
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}
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return t;
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}
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T *FindByIdNoOops(H h) {
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int first = 0, last = n-1;
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while(first <= last) {
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int mid = (first + last)/2;
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H hm = elem[mid].h;
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if(hm.v > h.v) {
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last = mid-1; // and first stays the same
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} else if(hm.v < h.v) {
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first = mid+1; // and last stays the same
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} else {
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return &(elem[mid]);
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}
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}
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return NULL;
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}
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T *First(void) {
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return (n == 0) ? NULL : &(elem[0]);
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}
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T *NextAfter(T *prev) {
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if(!prev) return NULL;
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if(prev - elem == (n - 1)) return NULL;
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return prev + 1;
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}
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void ClearTags(void) {
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int i;
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for(i = 0; i < n; i++) {
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elem[i].tag = 0;
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}
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}
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void Tag(H h, int tag) {
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int i;
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for(i = 0; i < n; i++) {
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if(elem[i].h.v == h.v) {
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elem[i].tag = tag;
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}
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}
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}
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void RemoveTagged(void) {
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int src, dest;
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dest = 0;
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for(src = 0; src < n; src++) {
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if(elem[src].tag) {
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// this item should be deleted
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} else {
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if(src != dest) {
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elem[dest] = elem[src];
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}
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dest++;
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}
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}
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n = dest;
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// and elemsAllocated is untouched, because we didn't resize
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}
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void RemoveById(H h) {
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ClearTags();
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FindById(h)->tag = 1;
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RemoveTagged();
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}
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void MoveSelfInto(IdList<T,H> *l) {
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memcpy(l, this, sizeof(*this));
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elemsAllocated = n = 0;
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elem = NULL;
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}
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void DeepCopyInto(IdList<T,H> *l) {
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l->elem = (T *)MemAlloc(elemsAllocated * sizeof(elem[0]));
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memcpy(l->elem, elem, elemsAllocated * sizeof(elem[0]));
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l->elemsAllocated = elemsAllocated;
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l->n = n;
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}
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void Clear(void) {
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elemsAllocated = n = 0;
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if(elem) MemFree(elem);
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elem = NULL;
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}
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};
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class NameStr {
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public:
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char str[64];
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inline void strcpy(char *in) {
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memcpy(str, in, min(strlen(in)+1, sizeof(str)));
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str[sizeof(str)-1] = '\0';
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}
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};
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#endif
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