From 2d4671d5469116b05709bb1acb614d784d339964 Mon Sep 17 00:00:00 2001
From: Keuin <keuinx@gmail.com>
Date: Fri, 15 Apr 2022 14:06:27 +0800
Subject: Make ray3::decay_ distinguishable between different color channels.

---
 bitmap.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'bitmap.h')

diff --git a/bitmap.h b/bitmap.h
index 64f69a6..a544b03 100644
--- a/bitmap.h
+++ b/bitmap.h
@@ -123,6 +123,11 @@ pixel<T> operator*(S scale, const pixel <T> &pixel) {
     return ::pixel < T > {.r=(T) (pixel.r * scale), .g=(T) (pixel.g * scale), .b=(T) (pixel.b * scale)};
 }
 
+template<typename S, typename T>
+pixel<T> operator*(const vec3<S> &scale, const pixel <T> &pixel) {
+    return ::pixel < T > {.r=(T) (pixel.r * scale.x), .g=(T) (pixel.g * scale.y), .b=(T) (pixel.b * scale.z)};
+}
+
 // Mix two colors a and b. Returns a*u + b*v
 template<typename T>
 inline pixel<T> mix(const pixel<T> &a, const pixel<T> &b, double u, double v) {
-- 
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