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authorKarl Berry <karl@freefriends.org>2013-04-02 23:03:22 +0000
committerKarl Berry <karl@freefriends.org>2013-04-02 23:03:22 +0000
commit324efbd652f973cd70f42fe08c665c518995bcbe (patch)
tree818ae382dfa133f3dcceec8e12e4cbd42be8bcf4 /Build/source/utils/asymptote/triple.h
parentbbf699abe485e707133ff3ba502119f261f27269 (diff)
asy 2.21 sources (no runtime update)
git-svn-id: svn://tug.org/texlive/trunk@29618 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/utils/asymptote/triple.h')
-rw-r--r--Build/source/utils/asymptote/triple.h136
1 files changed, 136 insertions, 0 deletions
diff --git a/Build/source/utils/asymptote/triple.h b/Build/source/utils/asymptote/triple.h
index fde711bb5e3..62bda62d914 100644
--- a/Build/source/utils/asymptote/triple.h
+++ b/Build/source/utils/asymptote/triple.h
@@ -12,14 +12,35 @@
#include <cassert>
#include <iostream>
#include <cmath>
+#include <cstring>
#include "common.h"
#include "angle.h"
+#include "pair.h"
namespace camp {
typedef double Triple[3];
+class triple;
+
+bool isIdTransform3(const double* t);
+void copyTransform3(double*& d, const double* s);
+void multiplyTransform3(double*& t, const double* s, const double* r);
+
+void copyTriples(size_t n, Triple* d, const Triple* s);
+void transformTriples(const double* t, size_t n, Triple* d, const Triple* s);
+void transformshiftlessTriples(const double* t, size_t n, Triple* d, const Triple* s);
+void transformNormalsTriples(const double* t, size_t n, Triple* d, const Triple* s);
+void unitTriples(size_t n, Triple* d);
+
+void boundsTriples(double& x, double& y, double& z, double& X, double& Y, double& Z, size_t n, const Triple* v);
+
+void ratioTriples(pair &b, double (*m)(double, double), bool &first, size_t n, const Triple* v);
+
+void normalizeTriple(Triple v);
+void crossTriple(Triple n, const Triple u, const Triple v);
+
class triple : virtual public gc {
double x;
double y;
@@ -32,10 +53,122 @@ public:
virtual ~triple() {}
+ void set(double X, double Y=0.0, double Z=0.0) { x=X; y=Y; z=Z; }
+
double getx() const { return x; }
double gety() const { return y; }
double getz() const { return z; }
+ // transform by column-major matrix
+ friend triple operator* (const double* t, const triple& v)
+ {
+ if(t == NULL)
+ return v;
+
+ double f=t[3]*v.x+t[7]*v.y+t[11]*v.z+t[15];
+ if(f == 0.0)
+ reportError("division by 0 in transform of a triple");
+ f=1.0/f;
+
+ return triple((t[0]*v.x+t[4]*v.y+t[8]*v.z+t[12])*f,
+ (t[1]*v.x+t[5]*v.y+t[9]*v.z+t[13])*f,
+ (t[2]*v.x+t[6]*v.y+t[10]*v.z+t[14])*f);
+ }
+
+ friend triple multshiftless(const double* t, const triple& v)
+ {
+ if(t == NULL)
+ return v;
+
+ double f=t[3]*v.x+t[7]*v.y+t[11]*v.z+t[15];
+ if(f == 0.0)
+ reportError("division by 0 in shiftless transform of a triple");
+ f=1.0/f;
+
+ return triple((t[0]*v.x+t[4]*v.y+t[8]*v.z)*f,
+ (t[1]*v.x+t[5]*v.y+t[9]*v.z)*f,
+ (t[2]*v.x+t[6]*v.y+t[10]*v.z)*f);
+ }
+
+ friend void transformtriples(const double* t, size_t n, triple* d,
+ const triple* s)
+ {
+ if(n == 0 || d == NULL || s == NULL)
+ return;
+
+ if(isIdTransform3(t)) {
+ copytriples(n, d, s);
+ return;
+ }
+
+ for(size_t i=0; i < n; i++) {
+ const double& x = s[i].x;
+ const double& y = s[i].y;
+ const double& z = s[i].z;
+ double f=t[3]*x+t[7]*y+t[11]*z+t[15];
+ if(f == 0.0)
+ reportError("division by 0 in transformtriples");
+ f=1.0/f;
+ d[i].x=(t[0]*x+t[4]*y+t[8]*z+t[12])*f;
+ d[i].y=(t[1]*x+t[5]*y+t[9]*z+t[13])*f;
+ d[i].z=(t[2]*x+t[6]*y+t[10]*z+t[14])*f;
+ }
+ }
+
+ friend void copytriples(size_t n, triple* d, const triple* s)
+ {
+ if(d == NULL || s == NULL)
+ return;
+
+ for(size_t i=0; i < n; i++) d[i]=s[i];
+ }
+
+ friend void boundstriples(triple& Min, triple& Max, size_t n, const triple* v)
+ {
+ if(n==0 || v==NULL)
+ return;
+
+ double x,y,z;
+ double X,Y,Z;
+
+ X=x=v[0].getx();
+ Y=y=v[0].gety();
+ Z=z=v[0].getz();
+ for(size_t i=1; i < n; ++i) {
+ const double vx=v[i].getx();
+ x=fmin(x,vx); X=fmax(X,vx);
+ const double vy=v[i].gety();
+ y=fmin(y,vy); Y=fmax(Y,vy);
+ const double vz=v[i].getz();
+ z=fmin(z,vz); Z=fmax(Z,vz);
+ }
+
+ Min.set(x,y,z);
+ Max.set(X,Y,Z);
+ }
+
+ friend void ratiotriples(pair &b, double (*m)(double, double), bool &first,
+ size_t n, const triple* v)
+ {
+ if(n==0 || v==NULL)
+ return;
+
+ if(first) {
+ first=false;
+ const triple& v0=v[0];
+ b=pair(v0.x/v0.z,v0.y/v0.z);
+ }
+
+ double x=b.getx();
+ double y=b.gety();
+ for(size_t i=0; i < n; ++i) {
+ const triple& vi = v[i];
+ x=m(x,vi.x/vi.z);
+ y=m(y,vi.y/vi.z);
+ }
+ b=pair(x,y);
+ }
+
friend triple operator+ (const triple& z, const triple& w)
{
return triple(z.x + w.x, z.y + w.y, z.z + w.z);
@@ -184,6 +317,9 @@ inline triple perp(triple v, triple u)
return v-dot(v,u)*u;
}
+double xratio(const triple& v);
+double yratio(const triple& v);
+
} //namespace camp
GC_DECLARE_PTRFREE(camp::triple);