commit 7e9c50b764e850da9277812b42ebea67bba2cd27
Author: Jean-Michel Gorius <jean-michel.gorius@protonmail.com>
Date:   Thu Nov 10 21:17:15 2022 +0100

    Initial commit

diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..9b3aa8b
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1 @@
+BasedOnStyle: LLVM
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d0f11d4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+build/
+
+*.ppm
+
+.clangd/
+.cache/
+.vs/
+.vscode/
+
+compile_flags.txt
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..6c1673f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# Ray tracing in one week-end
+
+C implementation of the [*Ray tracing in one week-end*](https://raytracing.github.io/) series by Peter Shirley.
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..8848b68
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+CC=${CC:-"gcc"}
+CFLAGS=${CFLAGS:-"-Wall -Wextra -std=c18 -g"}
+LDFLAGS=${LDFLAGS:-""}
+MAIN_FILE=${MAIN_FILE:-"main.c"}
+
+# Write out compile_flags.txt for clangd
+echo "${CFLAGS}" | tr ' ' '\n' > compile_flags.txt
+
+mkdir -p build
+
+${CC} ${CFLAGS} ${MAIN_FILE} -o build/raytracer ${LDFLAGS}
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..0ff2659
--- /dev/null
+++ b/main.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+
+int main(void) {
+  const int image_width = 256;
+  const int image_height = 256;
+
+  printf("P3\n%u %u\n255\n", image_width, image_height);
+
+  for(int j = image_height - 1; j >= 0; --j) {
+    for(int i = 0; i < image_width; ++i) {
+        double r = (double)(i) / (image_width - 1);
+        double g = (double)(j) / (image_height - 1);
+        double b = 0.25;
+
+        int ir = (int)(255.999 * r);
+        int ig = (int)(255.999 * g);
+        int ib = (int)(255.999 * b);
+
+        printf("%d %d %d\n", ir, ig, ib);
+    }
+  }
+
+  return 0;
+}