Merge pull request #1 from milmana/dev

Dev

.vscode/settings.json

@@ -0,0 +1,48 @@
+{
+    "files.associations": {
+        "array": "cpp",
+        "atomic": "cpp",
+        "bit": "cpp",
+        "*.tcc": "cpp",
+        "cctype": "cpp",
+        "clocale": "cpp",
+        "cmath": "cpp",
+        "compare": "cpp",
+        "concepts": "cpp",
+        "cstdarg": "cpp",
+        "cstddef": "cpp",
+        "cstdint": "cpp",
+        "cstdio": "cpp",
+        "cstdlib": "cpp",
+        "cwchar": "cpp",
+        "cwctype": "cpp",
+        "deque": "cpp",
+        "string": "cpp",
+        "unordered_map": "cpp",
+        "vector": "cpp",
+        "exception": "cpp",
+        "algorithm": "cpp",
+        "functional": "cpp",
+        "iterator": "cpp",
+        "memory": "cpp",
+        "memory_resource": "cpp",
+        "numeric": "cpp",
+        "random": "cpp",
+        "string_view": "cpp",
+        "system_error": "cpp",
+        "tuple": "cpp",
+        "type_traits": "cpp",
+        "utility": "cpp",
+        "initializer_list": "cpp",
+        "iosfwd": "cpp",
+        "iostream": "cpp",
+        "istream": "cpp",
+        "limits": "cpp",
+        "new": "cpp",
+        "numbers": "cpp",
+        "ostream": "cpp",
+        "stdexcept": "cpp",
+        "streambuf": "cpp",
+        "typeinfo": "cpp"
+    }
+}

Makefile

@@ -0,0 +1,3 @@
+all:
+	g++ main.cc
+	./a.out

README.md

@@ -1,2 +1,5 @@
 # raytrace
 ray tracing and other graphical stuff
+
+# textbook
+[Ray Tracing in One Weekend](https://raytracing.github.io/)

main.cc

@@ -0,0 +1,23 @@
+#include <iostream>
+#include <vector>
+#include <tuple>
+
+#include "raytrace.hh"
+
+int main(int argc, char **argv) {
+
+    auto vec = vec3<double>{1., 2., 3.};
+    std::cout << vec << std::endl;
+
+    auto orig = vec3<double>{15., 16., 17.};
+    auto dir = vec3<double>{21., 22., 23.};
+    ray3 ray{orig, dir};
+    std::cout << ray << std::endl;
+    std::cout << vec * .001 << std::endl;
+    std::cout << .2 * vec << std::endl;
+
+    std::cout << ray(100) << std::endl;
+
+    return 0;
+
+}

raytrace.hh

@@ -0,0 +1,71 @@
+#include <iostream>
+#include <vector>
+
+template <typename T>
+struct vec3 {
+
+    std::vector<T> val;
+
+    vec3() { val = {0., 0., 0.};  }
+    vec3(T x, T y, T z) { val = {x,y,z}; }
+
+};
+
+template <typename T>
+vec3<T> operator*(const vec3<T>& lhs, const vec3<T> &rhs) { 
+    return {lhs.val[0] * rhs.val[0], lhs.val[1] * rhs.val[1], lhs.val[2] * rhs.val[2]}; 
+}
+
+template <typename T>
+vec3<T> operator*(const vec3<T>& lhs, const T& rhs) { 
+    return {lhs.val[0] * rhs, lhs.val[1] * rhs, lhs.val[2] * rhs}; 
+}
+
+template <typename T>
+vec3<T> operator*(const T& lhs, const vec3<T>& rhs) { 
+    return {lhs * rhs.val[0], lhs * rhs.val[1], lhs * rhs.val[2]}; 
+}
+
+template <typename T>
+vec3<T> operator+(const vec3<T>& lhs, const vec3<T>& rhs) { 
+    return {lhs.val[0] + rhs.val[0], lhs.val[1] + rhs.val[1], lhs.val[2] + rhs.val[2]}; 
+}
+
+template <typename T>
+vec3<T> operator+(const vec3<T>& lhs, const T& rhs) { 
+    return {lhs.val[0] + rhs, lhs.val[1] + rhs, lhs.val[2] + rhs}; 
+}
+
+template <typename T>
+vec3<T> operator+(const T& lhs, const vec3<T>& rhs) { 
+    return {lhs + rhs.val[0], lhs + rhs.val[1], lhs + rhs.val[2]}; 
+}
+
+template<typename T>
+std::ostream &operator<<(std::ostream &os, const vec3<T> &v)
+{
+    return os << "(" << v.val[0] << "," << v.val[1] << "," << v.val[2] << ")";
+}
+
+template <typename T>
+struct ray3 {
+
+    // p = a + tb
+    // a := origin
+    // b := direction
+
+    vec3<T> a, b;
+
+    ray3 (vec3<T> orig, vec3<T> dir) {
+        a = orig;
+        b = dir;
+    }
+
+    vec3<T> operator()(const T t) { return a + t*b;  }
+};
+
+template<typename T>
+std::ostream &operator<<(std::ostream &os, const ray3<T> &v)
+{
+    return os << "[" << v.a << "; " << v.b << "]";
+}