// Copyright 2009-2020 Intel Corporation
// SPDX-License-Identifier: Apache-2.0

#pragma once

#include "quadv.h"
#include "quad_intersector_moeller.h"
#include "quad_intersector_pluecker.h"

namespace embree
{
  namespace isa
  {
    /*! Intersects M quads with 1 ray */
    template<int M, bool filter>
    struct QuadMvIntersector1Moeller
    {
      typedef QuadMv<M> Primitive;
      typedef QuadMIntersector1MoellerTrumbore<M,filter> Precalculations;
        
      /*! Intersect a ray with the M quads and updates the hit. */
      static __forceinline void intersect(const Precalculations& pre, RayHit& ray, IntersectContext* context, const Primitive& quad)
      {
        STAT3(normal.trav_prims,1,1,1);
        pre.intersect(ray,context,quad.v0,quad.v1,quad.v2,quad.v3,quad.geomID(),quad.primID());
      }
        
      /*! Test if the ray is occluded by one of M quads. */
      static __forceinline bool occluded(const Precalculations& pre, Ray& ray, IntersectContext* context, const Primitive& quad)
      {
        STAT3(shadow.trav_prims,1,1,1);
        return pre.occluded(ray,context, quad.v0,quad.v1,quad.v2,quad.v3,quad.geomID(),quad.primID());
      }
      
      static __forceinline bool pointQuery(PointQuery* query, PointQueryContext* context, const Primitive& quad)
      {
        return PrimitivePointQuery1<Primitive>::pointQuery(query, context, quad);
      }
    };

    /*! Intersects M triangles with K rays. */
    template<int M, int K, bool filter>
    struct QuadMvIntersectorKMoeller
    {
      typedef QuadMv<M> Primitive;
      typedef QuadMIntersectorKMoellerTrumbore<M,K,filter> Precalculations;

      /*! Intersects K rays with M triangles. */
      static __forceinline void intersect(const vbool<K>& valid_i, Precalculations& pre, RayHitK<K>& ray, IntersectContext* context, const QuadMv<M>& quad)
      {
        for (size_t i=0; i<QuadMv<M>::max_size(); i++)
        {
          if (!quad.valid(i)) break;
          STAT3(normal.trav_prims,1,popcnt(valid_i),K);
          const Vec3vf<K> p0 = broadcast<vfloat<K>>(quad.v0,i);
          const Vec3vf<K> p1 = broadcast<vfloat<K>>(quad.v1,i);
          const Vec3vf<K> p2 = broadcast<vfloat<K>>(quad.v2,i);
          const Vec3vf<K> p3 = broadcast<vfloat<K>>(quad.v3,i);
          pre.intersectK(valid_i,ray,p0,p1,p2,p3,IntersectKEpilogM<M,K,filter>(ray,context,quad.geomID(),quad.primID(),i));
        }
      }

      /*! Test for K rays if they are occluded by any of the M triangles. */
      static __forceinline vbool<K> occluded(const vbool<K>& valid_i, Precalculations& pre, RayK<K>& ray, IntersectContext* context, const QuadMv<M>& quad)
      {
        vbool<K> valid0 = valid_i;

        for (size_t i=0; i<QuadMv<M>::max_size(); i++)
        {
          if (!quad.valid(i)) break;
          STAT3(shadow.trav_prims,1,popcnt(valid0),K);
          const Vec3vf<K> p0 = broadcast<vfloat<K>>(quad.v0,i);
          const Vec3vf<K> p1 = broadcast<vfloat<K>>(quad.v1,i);
          const Vec3vf<K> p2 = broadcast<vfloat<K>>(quad.v2,i);
          const Vec3vf<K> p3 = broadcast<vfloat<K>>(quad.v3,i);
          if (pre.intersectK(valid0,ray,p0,p1,p2,p3,OccludedKEpilogM<M,K,filter>(valid0,ray,context,quad.geomID(),quad.primID(),i)))
            break;
        }
        return !valid0;
      }
      
      /*! Intersect a ray with M triangles and updates the hit. */
      static __forceinline void intersect(Precalculations& pre, RayHitK<K>& ray, size_t k, IntersectContext* context, const QuadMv<M>& quad)
      {
        STAT3(normal.trav_prims,1,1,1);
        pre.intersect1(ray,k,context,quad.v0,quad.v1,quad.v2,quad.v3,quad.geomID(),quad.primID());
      }

      /*! Test if the ray is occluded by one of the M triangles. */
      static __forceinline bool occluded(Precalculations& pre, RayK<K>& ray, size_t k, IntersectContext* context, const QuadMv<M>& quad)
      {
        STAT3(shadow.trav_prims,1,1,1);
        return pre.occluded1(ray,k,context,quad.v0,quad.v1,quad.v2,quad.v3,quad.geomID(),quad.primID());
      }
    };

    /*! Intersects M quads with 1 ray */
    template<int M, bool filter>
    struct QuadMvIntersector1Pluecker
    {
      typedef QuadMv<M> Primitive;
      typedef QuadMIntersector1Pluecker<M,filter> Precalculations;
        
      /*! Intersect a ray with the M quads and updates the hit. */
      static __forceinline void intersect(const Precalculations& pre, RayHit& ray, IntersectContext* context, const Primitive& quad)
      {
        STAT3(normal.trav_prims,1,1,1);
        pre.intersect(ray,context,quad.v0,quad.v1,quad.v2,quad.v3,quad.geomID(),quad.primID());
      }
        
      /*! Test if the ray is occluded by one of M quads. */
      static __forceinline bool occluded(const Precalculations& pre, Ray& ray, IntersectContext* context, const Primitive& quad)
      {
        STAT3(shadow.trav_prims,1,1,1);
        return pre.occluded(ray,context, quad.v0,quad.v1,quad.v2,quad.v3,quad.geomID(),quad.primID());
      }
      
      static __forceinline bool pointQuery(PointQuery* query, PointQueryContext* context, const Primitive& quad)
      {
        return PrimitivePointQuery1<Primitive>::pointQuery(query, context, quad);
      }
    };

    /*! Intersects M triangles with K rays. */
    template<int M, int K, bool filter>
    struct QuadMvIntersectorKPluecker
    {
      typedef QuadMv<M> Primitive;
      typedef QuadMIntersectorKPluecker<M,K,filter> Precalculations;

      /*! Intersects K rays with M triangles. */
      static __forceinline void intersect(const vbool<K>& valid_i, Precalculations& pre, RayHitK<K>& ray, IntersectContext* context, const QuadMv<M>& quad)
      {
        for (size_t i=0; i<QuadMv<M>::max_size(); i++)
        {
          if (!quad.valid(i)) break;
          STAT3(normal.trav_prims,1,popcnt(valid_i),K);
          const Vec3vf<K> p0 = broadcast<vfloat<K>>(quad.v0,i);
          const Vec3vf<K> p1 = broadcast<vfloat<K>>(quad.v1,i);
          const Vec3vf<K> p2 = broadcast<vfloat<K>>(quad.v2,i);
          const Vec3vf<K> p3 = broadcast<vfloat<K>>(quad.v3,i);
          pre.intersectK(valid_i,ray,p0,p1,p2,p3,IntersectKEpilogM<M,K,filter>(ray,context,quad.geomID(),quad.primID(),i));
        }
      }

      /*! Test for K rays if they are occluded by any of the M triangles. */
      static __forceinline vbool<K> occluded(const vbool<K>& valid_i, Precalculations& pre, RayK<K>& ray, IntersectContext* context, const QuadMv<M>& quad)
      {
        vbool<K> valid0 = valid_i;

        for (size_t i=0; i<QuadMv<M>::max_size(); i++)
        {
          if (!quad.valid(i)) break;
          STAT3(shadow.trav_prims,1,popcnt(valid0),K);
          const Vec3vf<K> p0 = broadcast<vfloat<K>>(quad.v0,i);
          const Vec3vf<K> p1 = broadcast<vfloat<K>>(quad.v1,i);
          const Vec3vf<K> p2 = broadcast<vfloat<K>>(quad.v2,i);
          const Vec3vf<K> p3 = broadcast<vfloat<K>>(quad.v3,i);
          if (pre.intersectK(valid0,ray,p0,p1,p2,p3,OccludedKEpilogM<M,K,filter>(valid0,ray,context,quad.geomID(),quad.primID(),i)))
            break;
        }
        return !valid0;
      }
      
      /*! Intersect a ray with M triangles and updates the hit. */
      static __forceinline void intersect(Precalculations& pre, RayHitK<K>& ray, size_t k, IntersectContext* context, const QuadMv<M>& quad)
      {
        STAT3(normal.trav_prims,1,1,1);
        pre.intersect1(ray,k,context,quad.v0,quad.v1,quad.v2,quad.v3,quad.geomID(),quad.primID());
      }

      /*! Test if the ray is occluded by one of the M triangles. */
      static __forceinline bool occluded(Precalculations& pre, RayK<K>& ray, size_t k, IntersectContext* context, const QuadMv<M>& quad)
      {
        STAT3(shadow.trav_prims,1,1,1);
        return pre.occluded1(ray,k,context,quad.v0,quad.v1,quad.v2,quad.v3,quad.geomID(),quad.primID());
      }
    };
  }
}

