Color3 getDiffuse(const Vector3& lightDir , const Vector3& normal ,
const Color3& lightIntensity , const Color3& diffuse)
{
Real coe = std::max(0.0 , lightDir ^ normal);
Color3 res = (lightIntensity | diffuse) * coe;
res.clamp();
return res;
}
Color3 getSpecular(const Vector3& reflecDir , const Vector3& visionDir ,
const Color3& lightIntensity , const Color3& specular)
{
Real coe = std::max(0.0 , reflecDir ^ visionDir);
coe = pow(coe , specularCoefficient);
Color3 res = (lightIntensity | specular) * coe;
res.clamp();
return res;
}
Color3 getPhong(const Vector3& p , const Vector3& visionDir ,
const Vector3& normal , const Vector3& lightSourcePos ,
const Color3& lightIntensity , Geometry* obj , const Real& directCoe)
{
Vector3 lightDir = lightSourcePos - p;
lightDir.normalize();
Vector3 reflecDir = normal * ((normal ^ lightDir) * 2.0) - lightDir;
reflecDir.normalize();
Color3 diffuseIntensity = getDiffuse(lightDir , normal ,
lightIntensity , obj->get_diffuse_color(p));
Color3 specularIntensity = getSpecular(reflecDir , visionDir ,
lightIntensity , obj->get_material().specular);
Color3 ambientIntensity = getAmbient(lightIntensity , obj->get_material().ambient);
Color3 res = (diffuseIntensity + specularIntensity) * directCoe + ambientIntensity;
res.clamp();
return res;
}
Color3 getAmbient(const Color3& lightIntensity , const Color3& ambient)
{
Color3 res = (lightIntensity | ambient);
res.clamp();
return res;
}
