#include "shading_utils.h"

surface lm_bake (float Ka = 0.2, Kd = 0.5, Ks = 0.5;
           string bakefile = "";
           float roughness = 0.1;
           )
 {
  normal Nn = normalize(N);
  vector V = normalize(-I);
  
  extern point P;


  color env = 0;
  color lambert = 0;
  color occ = 0;
  color shadowfactor = 0;
  //float shadow;




// ENV ILLUMINANCE LOOP
illuminance( "env", P,Nn, PI/2 )
  {    
    env += Cs * Cl * normalize(L).Nn; 
    bake( concat(bakefile,"_env.bake&binary"), s, t, env );
  }

// SUN ILLUMINANCE LOOP
illuminance("sun", P, Nn, PI/2 )
  {
    
    lambert += Cl * normalize(L).Nn;
    bake( concat(bakefile,"_diff.bake&binary"), s, t, lambert ); 
  }

// OCCLUSION ILLUMINANCE LOOP
illuminance("occlusion", P, Nn, PI/2 )
  {
    
    occ += Cl;
    bake( concat(bakefile,"_occ.bake&binary"), s, t, occ ); 
  }

// SHADOW ILLUMINANCE LOOP
illuminance("sun", P, Nn, PI/2 )
  {
    
    shadowfactor += Cl;
    bake( concat(bakefile,"_shadow.bake&binary"), s, t, shadowfactor ); 
  }



color spec = specular(Nn, V, roughness);
bake( concat(bakefile,"_spec.bake&binary"), s, t, spec );
bake( concat(bakefile,"_shading.bake&binary"), s, t, (Ka * env + Kd * lambert) );

//float aov_shadow  = computeShadowValue(N);
//bake( concat(bakefile,"_shadow.bake&binary"), s, t, aov_shadow );

Ci = (Cs * (Ka * env + Kd * lambert) + 1 * Ks * spec);


}