Added fun depth shader

shader/depthshader.cpp

@@ -0,0 +1,12 @@
+#include "depthshader.h"
+
+Color DepthShader::shade(const Scene &scene, const Ray &ray) const
+{
+    float brightness = exp(-ray.length * 0.1f);
+    return brightness * nearColor + (1 - brightness) * farColor;
+}
+
+DepthShader::DepthShader(const Color &nearColor, const Color &farColor) : nearColor(nearColor), farColor(farColor)
+{
+
+}

shader/depthshader.h

@@ -0,0 +1,21 @@
+#ifndef CG1_TRACER_DEPTHSHADER_H
+#define CG1_TRACER_DEPTHSHADER_H
+
+
+#include "shader/shader.h"
+
+class DepthShader : public Shader {
+
+public:
+    DepthShader(Color const &nearColor = Color(1, 1, 1), Color const &farColor = Color(0, 0, 0));
+
+    // Shader functions
+    Color shade(Scene const &scene, Ray const &ray) const override;
+
+private:
+    Color nearColor;
+    Color farColor;
+};
+
+
+#endif //CG1_TRACER_DEPTHSHADER_H