From 31f4244352b5e68eed770090419541d469f7f999 Mon Sep 17 00:00:00 2001
From: Jaron Kent-Dobias <jaron@kent-dobias.com>
Date: Fri, 6 Jul 2018 14:51:29 -0400
Subject: split up some files

---
 lib/orthogonal.h | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 107 insertions(+), 9 deletions(-)

(limited to 'lib/orthogonal.h')

diff --git a/lib/orthogonal.h b/lib/orthogonal.h
index 60d5f49..0b2fdd5 100644
--- a/lib/orthogonal.h
+++ b/lib/orthogonal.h
@@ -1,24 +1,122 @@
 
+#pragma once
+
 #include <stdlib.h>
 #include <gsl/gsl_rng.h>
 #include <gsl/gsl_randist.h>
-#include <math.h>
+#include <cmath>
 
 #include "types.h"
 
-void vector_replace(q_t n, double *v1, const double *v2);
+template <q_t q, class T>
+struct orthogonal_t { T *x; };
+
+template <q_t q, class T>
+void init(orthogonal_t <q, T> *ptr) {
+  ptr->x = (T *)calloc(q * q, sizeof(T));
+
+  for (q_t i = 0; i < q; i++) {
+    ptr->x[q * i + i] = (T)1;
+  }
+}
+
+template <q_t q, class T>
+orthogonal_t <q, T> copy (orthogonal_t <q, T> m) {
+  orthogonal_t <q, T> m_copy;
+  m_copy.x = (T *)calloc(q * q, sizeof(T));
+
+  for (q_t i = 0; i < q * q; i++) {
+    m_copy.x[i] = m.x[i];
+  }
+
+  return m_copy;
+}
+
+template <q_t q, class T>
+void free_spin (orthogonal_t <q, T> m) {
+  free(m.x);
+}
+
+template <q_t q, class T>
+vector_t <q, T> act (orthogonal_t <q, T> m, vector_t <q, T> v) {
+  vector_t <q, T> v_rot;
+  v_rot.x = (T *)calloc(q, sizeof(T));
+
+  for (q_t i = 0; i < q; i++) {
+    for (q_t j = 0; j < q; j++) {
+      v_rot.x[i] += m.x[q * i + j] * v.x[j];
+    }
+  }
+
+  return v_rot;
+}
+
+template <q_t q, class T>
+orthogonal_t <q, T> act (orthogonal_t <q, T> m1, orthogonal_t <q, T> m2) {
+  orthogonal_t <q, T> m2_rot;
+  m2_rot.x = (T *)calloc(q * q, sizeof(T));
+
+  for (q_t i = 0; i < q; i++) {
+    for (q_t j = 0; j < q; j++) {
+      for (q_t k = 0; k < q; k++) {
+        m2_rot.x[i * q + j] += m1.x[i * q + j] * m2.x[j * q + k];
+      }
+    }
+  }
+
+  return m2_rot;
+}
+
+template <q_t q, class T>
+vector_t <q, T> act_inverse (orthogonal_t <q, T> m, vector_t <q, T> v) {
+  vector_t <q, T> v_rot;
+  v_rot.x = (T *)calloc(q, sizeof(T));
+
+  for (q_t i = 0; i < q; i++) {
+    for (q_t j = 0; j < q; j++) {
+      v_rot.x[i] += m.x[q * j + i] * v.x[j];
+    }
+  }
+
+  return v_rot;
+}
+
+template <q_t q, class T>
+orthogonal_t <q, T> act_inverse (orthogonal_t <q, T> m1, orthogonal_t <q, T> m2) {
+  orthogonal_t <q, T> m2_rot;
+  m2_rot.x = (T *)calloc(q * q, sizeof(T));
 
-void vector_add(q_t n, double *v1, const double *v2);
+  for (q_t i = 0; i < q; i++) {
+    for (q_t j = 0; j < q; j++) {
+      for (q_t k = 0; k < q; k++) {
+        m2_rot.x[i * q + j] += m1.x[j * q + i] * m2.x[j * q + k];
+      }
+    }
+  }
 
-void vector_subtract(q_t n, double *v1, const double *v2);
+  return m2_rot;
+}
 
-double *vector_rotate(q_t n, const double *rot, const double *vec);
+template <q_t q>
+void generate_rotation (gsl_rng *r, orthogonal_t <q, double> *ptr) {
+  double *v = (double *)malloc(q * sizeof(double));
+  double v2 = 0;
 
-double *vector_rotate_inverse(q_t n, const double *rot, const double *vec);
+  for (q_t i = 0; i < q; i++) {
+    v[i] = gsl_ran_ugaussian(r);
+    v2 += v[i] * v[i];
+  }
 
-double vector_dot(q_t n, const double *v1, const double *v2);
+  ptr->x = (double *)calloc(q * q, sizeof(double));
+  
+  for (q_t i = 0; i < q; i++) {
+    ptr->x[q * i + i] = 1.0;
+    for (q_t j = 0; j < q; j++) {
+      ptr->x[q * i + j] -= 2 * v[i] * v[j] / v2;
+    }
+  }
 
-double *orthogonal_rotate(q_t n, const double *m1, const double *m2);
+  free(v);
+}
 
-double *gen_rot(gsl_rng *r, q_t n);
 
-- 
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