cloudy-raytracer/shader/cloudshader.h

#ifndef CG1_TRACER_CLOUDSHADER_H
#define CG1_TRACER_CLOUDSHADER_H

#include "scene/scene.h"
#include "shader.h"
#include "primitive/primitive.h"
#include "common/noise/worleynoise.h"

int const NOISE_SIZE = 32;

struct CloudSettings
{
    int densitySamples = 100;
    float scale = 1;
    float densityTreshold = 0.55f;
    float densityIntensity = 2.5f;
    float densityAbsorption = 1;
    Color cloudColor = Color(0.7f, 0.7f, 0.7f);
    Color wispyColor = Color(0.9f, 0.9f, 0.9f);
    float wispyIntensity = 0.3f;
};

class CloudShader : public Shader
{
public:
    CloudShader(CloudSettings const &settings = CloudSettings());

    // Shader functions
    Color shade(Scene const &scene, Ray const &ray) const;

private:
    CloudSettings settings;


    bool isTransparent() const;

    Noise cloudNoise;

    float getCloudDensity(Vector3d point) const;

    float fitToNoise(float point) const;
};


#endif //CG1_TRACER_CLOUDSHADER_H