Add intensity from emissioProfile to material and skysphere

RayTracer/material/BackgroundMaterial.cpp

@@ -11,8 +11,8 @@ BackgroundMaterial::BackgroundMaterial(
 }
 BackgroundMaterial::BackgroundMaterial(
     const std::shared_ptr<util::Sampler>& texture,
-    const util::Image& distribution)
-    : emission_profile({texture, distribution}) {
+    const util::Image& distribution, float intensity)
+    : emission_profile({texture, distribution, intensity}) {
 }
 BackgroundMaterial::BackgroundMaterial(const util::Vec3& albedo)
     : emission_profile({std::make_shared<Constant>(albedo)}) {

RayTracer/material/BackgroundMaterial.h

@@ -8,7 +8,7 @@ class BackgroundMaterial : public Material {
    public:
 	BackgroundMaterial(const std::shared_ptr<util::Sampler>& texture);
 	BackgroundMaterial(const std::shared_ptr<util::Sampler>& texture,
-	                   const util::Image& distribution);
+	                   const util::Image& distribution, float intensity = 1);
 	BackgroundMaterial(const util::Vec3& albedo);
 
 	util::Vec3 albedo(const std::pair<float, float>& uv) const override;

RayTracer/shape/SkySphere.cpp

@@ -11,7 +11,7 @@ SkySphere::SkySphere(const std::shared_ptr<util::Sampler>& sampler)
     : Sphere(1000, std::make_shared<material::BackgroundMaterial>(sampler)) {
 }
 SkySphere::SkySphere(const std::shared_ptr<util::Sampler>& sampler,
-                     util::Image& distribution)
+                     util::Image& distribution, float intensity)
     : Sphere(1000, std::make_shared<material::BackgroundMaterial>(sampler)) {
 	for (int x = 0; x < distribution.width; x++) {
 		for (int y = 0; y < distribution.height; y++) {
@@ -22,8 +22,8 @@ SkySphere::SkySphere(const std::shared_ptr<util::Sampler>& sampler,
 			distribution.setPixel(x, y, color);
 		}
 	}
-	material =
-	    std::make_shared<material::BackgroundMaterial>(sampler, distribution);
+	material = std::make_shared<material::BackgroundMaterial>(
+	    sampler, distribution, intensity);
 }
 // This intersect method rightly flips the normal.But the normal is never used
 // for non scatter materials, so we do not flip the normal

RayTracer/shape/SkySphere.h

@@ -10,7 +10,7 @@ class SkySphere : public Sphere {
    public:
 	SkySphere(const std::shared_ptr<util::Sampler>& sampler);
 	SkySphere(const std::shared_ptr<util::Sampler>& sampler,
-	          util::Image& distribution);
+	          util::Image& distribution, float intensity = 1);
 	float lightPdf(const util::SurfacePoint& p,
 	               const util::Vec3& dl_out) const override;
 	// We should have to flip the normal, but it does not matter