a69cc9f13d
Since Embree v3.13.0 supports AARCH64, switch back to the
official repo instead of using Embree-aarch64.
`thirdparty/embree/patches/godot-changes.patch` should now contain
an accurate diff of the changes done to the library.
(cherry picked from commit 767e374dce)
145 lines
6.2 KiB
C++
145 lines
6.2 KiB
C++
// Copyright 2009-2021 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "../common/ray.h"
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#include "curve_intersector_precalculations.h"
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namespace embree
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{
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namespace isa
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{
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template<int M>
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struct LineIntersectorHitM
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{
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__forceinline LineIntersectorHitM() {}
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__forceinline LineIntersectorHitM(const vfloat<M>& u, const vfloat<M>& v, const vfloat<M>& t, const Vec3vf<M>& Ng)
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: vu(u), vv(v), vt(t), vNg(Ng) {}
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__forceinline void finalize() {}
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__forceinline Vec2f uv (const size_t i) const { return Vec2f(vu[i],vv[i]); }
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__forceinline float t (const size_t i) const { return vt[i]; }
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__forceinline Vec3fa Ng(const size_t i) const { return Vec3fa(vNg.x[i],vNg.y[i],vNg.z[i]); }
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__forceinline Vec2vf<M> uv() const { return Vec2vf<M>(vu,vv); }
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__forceinline vfloat<M> t () const { return vt; }
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__forceinline Vec3vf<M> Ng() const { return vNg; }
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public:
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vfloat<M> vu;
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vfloat<M> vv;
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vfloat<M> vt;
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Vec3vf<M> vNg;
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};
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template<int M>
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struct FlatLinearCurveIntersector1
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{
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typedef CurvePrecalculations1 Precalculations;
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template<typename Ray, typename Epilog>
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static __forceinline bool intersect(const vbool<M>& valid_i,
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Ray& ray,
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IntersectContext* context,
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const LineSegments* geom,
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const Precalculations& pre,
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const Vec4vf<M>& v0i, const Vec4vf<M>& v1i,
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const Epilog& epilog)
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{
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/* transform end points into ray space */
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vbool<M> valid = valid_i;
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vfloat<M> depth_scale = pre.depth_scale;
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LinearSpace3<Vec3vf<M>> ray_space = pre.ray_space;
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const Vec3vf<M> ray_org ((Vec3fa)ray.org);
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const Vec4vf<M> v0 = enlargeRadiusToMinWidth<M>(context,geom,ray_org,v0i);
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const Vec4vf<M> v1 = enlargeRadiusToMinWidth<M>(context,geom,ray_org,v1i);
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Vec4vf<M> p0(xfmVector(ray_space,v0.xyz()-ray_org), v0.w);
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Vec4vf<M> p1(xfmVector(ray_space,v1.xyz()-ray_org), v1.w);
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/* approximative intersection with cone */
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const Vec4vf<M> v = p1-p0;
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const Vec4vf<M> w = -p0;
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const vfloat<M> d0 = madd(w.x,v.x,w.y*v.y);
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const vfloat<M> d1 = madd(v.x,v.x,v.y*v.y);
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const vfloat<M> u = clamp(d0*rcp(d1),vfloat<M>(zero),vfloat<M>(one));
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const Vec4vf<M> p = madd(u,v,p0);
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const vfloat<M> t = p.z;
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const vfloat<M> d2 = madd(p.x,p.x,p.y*p.y);
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const vfloat<M> r = p.w;
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const vfloat<M> r2 = r*r;
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valid &= (d2 <= r2) & (vfloat<M>(ray.tnear()) <= t) & (t <= vfloat<M>(ray.tfar));
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if (EMBREE_CURVE_SELF_INTERSECTION_AVOIDANCE_FACTOR != 0.0f)
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valid &= t > float(EMBREE_CURVE_SELF_INTERSECTION_AVOIDANCE_FACTOR)*r*depth_scale; // ignore self intersections
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if (unlikely(none(valid))) return false;
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/* ignore denormalized segments */
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const Vec3vf<M> T = v1.xyz()-v0.xyz();
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valid &= (T.x != vfloat<M>(zero)) | (T.y != vfloat<M>(zero)) | (T.z != vfloat<M>(zero));
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if (unlikely(none(valid))) return false;
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/* update hit information */
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LineIntersectorHitM<M> hit(u,zero,t,T);
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return epilog(valid,hit);
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}
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};
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template<int M, int K>
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struct FlatLinearCurveIntersectorK
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{
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typedef CurvePrecalculationsK<K> Precalculations;
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template<typename Epilog>
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static __forceinline bool intersect(const vbool<M>& valid_i,
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RayK<K>& ray, size_t k,
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IntersectContext* context,
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const LineSegments* geom,
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const Precalculations& pre,
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const Vec4vf<M>& v0i, const Vec4vf<M>& v1i,
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const Epilog& epilog)
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{
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/* transform end points into ray space */
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vbool<M> valid = valid_i;
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vfloat<M> depth_scale = pre.depth_scale[k];
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LinearSpace3<Vec3vf<M>> ray_space = pre.ray_space[k];
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const Vec3vf<M> ray_org(ray.org.x[k],ray.org.y[k],ray.org.z[k]);
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const Vec3vf<M> ray_dir(ray.dir.x[k],ray.dir.y[k],ray.dir.z[k]);
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const Vec4vf<M> v0 = enlargeRadiusToMinWidth<M>(context,geom,ray_org,v0i);
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const Vec4vf<M> v1 = enlargeRadiusToMinWidth<M>(context,geom,ray_org,v1i);
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Vec4vf<M> p0(xfmVector(ray_space,v0.xyz()-ray_org), v0.w);
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Vec4vf<M> p1(xfmVector(ray_space,v1.xyz()-ray_org), v1.w);
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/* approximative intersection with cone */
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const Vec4vf<M> v = p1-p0;
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const Vec4vf<M> w = -p0;
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const vfloat<M> d0 = madd(w.x,v.x,w.y*v.y);
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const vfloat<M> d1 = madd(v.x,v.x,v.y*v.y);
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const vfloat<M> u = clamp(d0*rcp(d1),vfloat<M>(zero),vfloat<M>(one));
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const Vec4vf<M> p = madd(u,v,p0);
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const vfloat<M> t = p.z;
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const vfloat<M> d2 = madd(p.x,p.x,p.y*p.y);
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const vfloat<M> r = p.w;
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const vfloat<M> r2 = r*r;
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valid &= (d2 <= r2) & (vfloat<M>(ray.tnear()[k]) <= t) & (t <= vfloat<M>(ray.tfar[k]));
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if (EMBREE_CURVE_SELF_INTERSECTION_AVOIDANCE_FACTOR != 0.0f)
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valid &= t > float(EMBREE_CURVE_SELF_INTERSECTION_AVOIDANCE_FACTOR)*r*depth_scale; // ignore self intersections
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if (unlikely(none(valid))) return false;
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/* ignore denormalized segments */
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const Vec3vf<M> T = v1.xyz()-v0.xyz();
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valid &= (T.x != vfloat<M>(zero)) | (T.y != vfloat<M>(zero)) | (T.z != vfloat<M>(zero));
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if (unlikely(none(valid))) return false;
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/* update hit information */
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LineIntersectorHitM<M> hit(u,zero,t,T);
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return epilog(valid,hit);
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}
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};
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}
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}
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