From b50f9b36b1fe99d33016ca643c97d81ea679d3e2 Mon Sep 17 00:00:00 2001
From: Jiri Pittner <jiri@pittnerovi.com>
Date: Thu, 28 Oct 2021 18:14:07 +0200
Subject: [PATCH] Initialization of Vec3, MAt3, and Quaternion from
 brace-enclosed list

---
 quaternion.h | 1 +
 t.cc         | 8 ++++++++
 vecmat3.h    | 2 ++
 3 files changed, 11 insertions(+)

diff --git a/quaternion.h b/quaternion.h
index ab0333b..46a1fe3 100644
--- a/quaternion.h
+++ b/quaternion.h
@@ -40,6 +40,7 @@ public:
 	T q[4];
 	//methods
 	Quaternion(void) {};
+	Quaternion(const T (&a)[4]) {memcpy(q,a,4*sizeof(T));};
 	Quaternion(const T x, const T u=0, const T v=0, const T w=0) {q[0]=x; q[1]=u; q[2]=v; q[3]=w;}; //quaternion from real(s)
 	Quaternion(const std::complex<T> &rhs) {q[0]=rhs.real(); q[1]=rhs.imag(); q[2]=0; q[3]=0;} //quaternion from complex
 	explicit Quaternion(const T* x, const int shift=1) {q[0]=0; memcpy(q+shift,x,(4-shift)*sizeof(T));} //for shift=1 quaternion from xyz vector
diff --git a/t.cc b/t.cc
index 192f138..017e0e8 100644
--- a/t.cc
+++ b/t.cc
@@ -2298,8 +2298,16 @@ if(1)
 {
 NRVec<int> v({1,2,3,4});
 cout <<v;
+v.resize(0);
+cout<<v;
 NRMat<int> m({{1,2,3},{4,5,6}});
 cout<<m;
+Vec3<double> x({1,2,3});
+cout<<x<<endl;
+Mat3<double> y({{1,2,3},{4,5,6},{7,8,9}});
+cout <<y<<endl;
+Quaternion<double> q({1,2,3,4});
+cout<<q<<endl;
 }
 
 
diff --git a/vecmat3.h b/vecmat3.h
index 81e016b..b18ebc5 100644
--- a/vecmat3.h
+++ b/vecmat3.h
@@ -50,6 +50,7 @@ public:
 	Vec3(void) {};
 	Vec3(const T x, const T u=0, const T v=0) {q[0]=x; q[1]=u; q[2]=v;}; //Vec3 from real(s)
 	Vec3(const T* x) {memcpy(q,x,3*sizeof(T));} 
+	Vec3(const T (&a)[3]) {memcpy(q,a,3*sizeof(T));};
 	
 	//get pointer to data transparently
 	inline operator const T*() const {return q;};
@@ -98,6 +99,7 @@ public:
 	T q[3][3];
 	//
 	Mat3(void) {};
+	Mat3(const T (&a)[3][3]) {memcpy(q,a,3*3*sizeof(T));}
 	Mat3(const T x) {memset(q,0,9*sizeof(T)); q[0][0]=q[1][1]=q[2][2]=x;}; //scalar matrix
 	Mat3(const T* x) {memcpy(q,x,9*sizeof(T));} 
 	Mat3(const T x00, const T x01,const T x02,const T x10,const T x11,const T x12,const T x20,const T x21,const T x22)