Added a setPixel function and replaced expression in setPixels with the new function

RayTracer/sampling/Image.cpp

 #include "Image.h"
 
+#include "../tools/Threadpool.h"
 #include "StratifiedSampler.h"
 
 namespace util {
@@ -9,10 +10,13 @@ Image::Image(int width, int height) : width(width), height(height) {
 		vec.insert(vec.end(), color);
 	}
 }
+void Image::setPixel(int x, int y, Vec3 color) {
+	vec[width * y + x] = color;
+}
 void Image::setPixels(std::shared_ptr<Sampler> sampler) {
 	for (int x = 0; x != width; x++) {
 		for (int y = 0; y != height; y++) {
-			vec[width * y + x] = sampler->color(x, y);
+			setPixel(x, y, sampler->color(x, y));
 		}
 	}
 }

RayTracer/sampling/Image.h

@@ -11,6 +11,7 @@ class Image {
    public:
 	Image(int width, int height);
 
+	void setPixel(int x, int y, Vec3 color);
 	void setPixels(std::shared_ptr<Sampler> sampler);
 
 	Vec3 operator[](const std::array<int, 2>& i) const;  // int x, int y
@@ -20,7 +21,7 @@ class Image {
 	const int height;
 
    private:
-	std::vector<util::Vec3> vec;
+	std::vector<Vec3> vec;
 };
 
 Image raytrace(const cam::CamObs& cam, const std::shared_ptr<Sampler>& sampler,