From 94217187eb2785939458f08d96c7b1b9e55439ab Mon Sep 17 00:00:00 2001
From: Julian T <julian@jtle.dk>
Date: Sun, 17 Jan 2021 00:09:15 +0100
Subject: Minor changed and draft for random sampling

---
 src/core/common.hpp   |  2 +-
 src/core/random.hpp   | 20 ++++++++++++++++++++
 src/core/spectrum.hpp |  2 +-
 src/core/vector.cpp   | 14 ++++++++++++++
 src/core/vector.hpp   | 17 +++++++++++++++++
 5 files changed, 53 insertions(+), 2 deletions(-)
 create mode 100644 src/core/random.hpp

(limited to 'src/core')

diff --git a/src/core/common.hpp b/src/core/common.hpp
index a3e682e..7965815 100644
--- a/src/core/common.hpp
+++ b/src/core/common.hpp
@@ -5,6 +5,6 @@
 
 #define ZERO_APPROX 1e-6
 
-#define INFINITY std::numeric_limits<double>::infinity()
+#define INFTY std::numeric_limits<double>::infinity()
 
 #endif
diff --git a/src/core/random.hpp b/src/core/random.hpp
new file mode 100644
index 0000000..bc6a173
--- /dev/null
+++ b/src/core/random.hpp
@@ -0,0 +1,20 @@
+#ifndef RANDOM_H
+#define RANDOM_H
+
+#include <random>
+
+// TODO think more about
+class Random {
+    public:
+        Random(int seed = 0) : m_gen(seed), m_dist(0, 1) {}
+
+        inline double getDouble() {
+            return m_dist(m_gen);
+        };
+
+    private:
+        std::minstd_rand m_gen;
+        std::uniform_real_distribution<double> m_dist;
+};
+
+#endif
diff --git a/src/core/spectrum.hpp b/src/core/spectrum.hpp
index de9355d..2a293fa 100644
--- a/src/core/spectrum.hpp
+++ b/src/core/spectrum.hpp
@@ -16,7 +16,7 @@ public:
     Spectrum operator*(const Spectrum &o) const;
     Spectrum operator/(const Spectrum &o) const;
 
-    Spectrum clamp(double low = 0, double high = INFINITY) const;
+    Spectrum clamp(double low = 0, double high = INFTY) const;
 
     double R() const { return c[0]; }
     double G() const { return c[1]; }
diff --git a/src/core/vector.cpp b/src/core/vector.cpp
index 51d8e2e..c790741 100644
--- a/src/core/vector.cpp
+++ b/src/core/vector.cpp
@@ -1,8 +1,22 @@
 #include "vector.hpp"
 
+#include <cmath>
 #include <math.h>
 #include <stdexcept>
 
+Vec2d::Vec2d() {
+    set(0, 0);
+}
+
+Vec2d::Vec2d(double x, double y) {
+    set(x, y);
+}
+
+void Vec2d::set(double x, double y) {
+    m_x = x;
+    m_y = y;
+}
+
 Vec3d::Vec3d() {
     set(0, 0, 0);
 }
diff --git a/src/core/vector.hpp b/src/core/vector.hpp
index 20e8210..adc0bae 100644
--- a/src/core/vector.hpp
+++ b/src/core/vector.hpp
@@ -2,12 +2,29 @@
 #define VECTOR_H
 
 #include <iostream>
+#include <math.h>
+
+class Vec2d {
+    public:
+        Vec2d();
+        Vec2d(double x, double y);
+
+        void set(double x, double y);
+
+        double m_x, m_y, m_z;
+};
 
 class Vec3d {
     public:
         Vec3d();
         Vec3d(double x, double y, double z);
 
+        static inline Vec3d FromSpherical(double sinTheta, double cosTheta, double phi) {
+            return Vec3d(sinTheta * std::cos(phi),
+                    sinTheta * std::sin(phi),
+                    cosTheta);
+        }
+
         void set(double x, double y, double z);
         void normalize();
 
-- 
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