initial commit

1 files changed, 34 insertions, 0 deletions

diff --git a/color.h b/color.h
new file mode 100644
index 0000000..1a16571
--- /dev/null
+++ b/color.h
@@ -0,0 +1,34 @@
+#ifndef COLOR_H
+#define COLOR_H
+
+#include "vec3.h"
+
+#include <algorithm>
+#include <iostream>
+
+#define GAMMA_CORRECT
+
+using color = vec3;
+
+void write_color(std::ostream& out, const color& pixel_color) {
+    auto r = pixel_color.x();
+    auto g = pixel_color.y();
+    auto b = pixel_color.z();
+
+#ifdef GAMMA_CORRECT
+    if (r > 0) r = sqrt(r);
+    if (g > 0) g = sqrt(g);
+    if (b > 0) b = sqrt(b);
+#endif
+
+    // Translate the [0,1] component values to the byte range [0,255].
+    int rbyte = static_cast<int>(255.999 * std::clamp(r, 0.0, 1.0));
+    int gbyte = static_cast<int>(255.999 * std::clamp(g, 0.0, 1.0));
+    int bbyte = static_cast<int>(255.999 * std::clamp(b, 0.0, 1.0));
+
+    // Write out the pixel color components.
+    out << rbyte << ' ' << gbyte << ' ' << bbyte << '\n';
+}
+
+#endif
+