surface_material.h

#pragma once
 
#include <complex>
#include <cgv/media/color.h>
 
#include "lib_begin.h"
 
namespace cgv {
    namespace media { 
        namespace illum {

enum BrdfType {
    BT_LAMBERTIAN = 0,      // use lambertian for diffuse part
    BT_OREN_NAYAR = 1,      // use oren nayar for diffuse part
    BT_STRAUSS_DIFFUSE = 2, // use diffuse part of strauss model for diffuse part
                            // reserve one more diffuse models for future use
    BT_PHONG = 4,           // shininess in range [1,128] is computed roughness
    BT_BLINN = 8,           // shininess in range [1,128] is computed roughness
    BT_COOK_TORRANCE = 12,
    BT_STRAUSS = 16
};

struct CGV_API surface_material {
    using color_type = cgv::rgb;
    BrdfType brdf_type = BrdfType(BT_STRAUSS_DIFFUSE + BT_STRAUSS);
    color_type diffuse_reflectance = { 0.5f };
    float roughness = 0.5f;
    float metalness = 0.0f;
    float ambient_occlusion = 1.0f;
    color_type emission = { 0.0f };
    float transparency = 0.0f;
    std::complex<float> propagation_slow_down = { 1.5f, 0.0f };
    float roughness_anisotropy = 0.0f;
    float roughness_orientation = 0.0f;
    color_type specular_reflectance = { 1.0f };
};
 
        }
    }
}
 
#include <cgv/config/lib_end.h>