273 lines
9.8 KiB
C++
273 lines
9.8 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 "geometry.h"
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#include "accel.h"
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namespace embree
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{
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struct MotionDerivativeCoefficients;
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/*! Instanced acceleration structure */
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struct Instance : public Geometry
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{
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ALIGNED_STRUCT_(16);
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static const Geometry::GTypeMask geom_type = Geometry::MTY_INSTANCE;
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public:
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Instance (Device* device, Accel* object = nullptr, unsigned int numTimeSteps = 1);
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~Instance();
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private:
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Instance (const Instance& other) DELETED; // do not implement
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Instance& operator= (const Instance& other) DELETED; // do not implement
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private:
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LBBox3fa nonlinearBounds(const BBox1f& time_range_in,
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const BBox1f& geom_time_range,
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float geom_time_segments) const;
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BBox3fa boundSegment(size_t itime,
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BBox3fa const& obbox0, BBox3fa const& obbox1,
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BBox3fa const& bbox0, BBox3fa const& bbox1,
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float t_min, float t_max) const;
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/* calculates the (correct) interpolated bounds */
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__forceinline BBox3fa bounds(size_t itime0, size_t itime1, float f) const
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{
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if (unlikely(gsubtype == GTY_SUBTYPE_INSTANCE_QUATERNION))
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return xfmBounds(slerp(local2world[itime0], local2world[itime1], f),
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lerp(getObjectBounds(itime0), getObjectBounds(itime1), f));
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return xfmBounds(lerp(local2world[itime0], local2world[itime1], f),
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lerp(getObjectBounds(itime0), getObjectBounds(itime1), f));
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}
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public:
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virtual void setNumTimeSteps (unsigned int numTimeSteps) override;
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virtual void setInstancedScene(const Ref<Scene>& scene) override;
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virtual void setTransform(const AffineSpace3fa& local2world, unsigned int timeStep) override;
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virtual void setQuaternionDecomposition(const AffineSpace3ff& qd, unsigned int timeStep) override;
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virtual AffineSpace3fa getTransform(float time) override;
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virtual void setMask (unsigned mask) override;
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virtual void build() {}
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virtual void addElementsToCount (GeometryCounts & counts) const override;
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virtual void commit() override;
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public:
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/*! calculates the bounds of instance */
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__forceinline BBox3fa bounds(size_t i) const {
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assert(i == 0);
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if (unlikely(gsubtype == GTY_SUBTYPE_INSTANCE_QUATERNION))
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return xfmBounds(quaternionDecompositionToAffineSpace(local2world[0]),object->bounds.bounds());
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return xfmBounds(local2world[0],object->bounds.bounds());
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}
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/*! gets the bounds of the instanced scene */
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__forceinline BBox3fa getObjectBounds(size_t itime) const {
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return object->getBounds(timeStep(itime));
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}
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/*! calculates the bounds of instance */
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__forceinline BBox3fa bounds(size_t i, size_t itime) const {
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assert(i == 0);
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if (unlikely(gsubtype == GTY_SUBTYPE_INSTANCE_QUATERNION))
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return xfmBounds(quaternionDecompositionToAffineSpace(local2world[itime]),getObjectBounds(itime));
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return xfmBounds(local2world[itime],getObjectBounds(itime));
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}
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/*! calculates the linear bounds of the i'th primitive for the specified time range */
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__forceinline LBBox3fa linearBounds(size_t i, const BBox1f& dt) const {
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assert(i == 0);
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LBBox3fa lbbox = nonlinearBounds(dt, time_range, fnumTimeSegments);
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return lbbox;
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}
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/*! calculates the build bounds of the i'th item, if it's valid */
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__forceinline bool buildBounds(size_t i, BBox3fa* bbox = nullptr) const
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{
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assert(i==0);
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const BBox3fa b = bounds(i);
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if (bbox) *bbox = b;
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return isvalid(b);
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}
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/*! calculates the build bounds of the i'th item at the itime'th time segment, if it's valid */
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__forceinline bool buildBounds(size_t i, size_t itime, BBox3fa& bbox) const
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{
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assert(i==0);
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const LBBox3fa bounds = linearBounds(i,itime);
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bbox = bounds.bounds ();
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return isvalid(bounds);
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}
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/* gets version info of topology */
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unsigned int getTopologyVersion() const {
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return numPrimitives;
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}
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/* returns true if topology changed */
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bool topologyChanged(unsigned int otherVersion) const {
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return numPrimitives != otherVersion;
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}
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/*! check if the i'th primitive is valid between the specified time range */
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__forceinline bool valid(size_t i, const range<size_t>& itime_range) const
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{
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assert(i == 0);
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for (size_t itime = itime_range.begin(); itime <= itime_range.end(); itime++)
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if (!isvalid(bounds(i,itime))) return false;
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return true;
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}
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__forceinline AffineSpace3fa getLocal2World() const
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{
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if (unlikely(gsubtype == GTY_SUBTYPE_INSTANCE_QUATERNION))
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return quaternionDecompositionToAffineSpace(local2world[0]);
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return local2world[0];
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}
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__forceinline AffineSpace3fa getLocal2World(float t) const
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{
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float ftime; const unsigned int itime = timeSegment(t, ftime);
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if (unlikely(gsubtype == GTY_SUBTYPE_INSTANCE_QUATERNION))
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return slerp(local2world[itime+0],local2world[itime+1],ftime);
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return lerp(local2world[itime+0],local2world[itime+1],ftime);
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}
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__forceinline AffineSpace3fa getWorld2Local() const {
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return world2local0;
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}
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__forceinline AffineSpace3fa getWorld2Local(float t) const {
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return rcp(getLocal2World(t));
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}
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template<int K>
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__forceinline AffineSpace3vf<K> getWorld2Local(const vbool<K>& valid, const vfloat<K>& t) const
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{
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if (unlikely(gsubtype == GTY_SUBTYPE_INSTANCE_QUATERNION))
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return getWorld2LocalSlerp<K>(valid, t);
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return getWorld2LocalLerp<K>(valid, t);
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}
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private:
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template<int K>
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__forceinline AffineSpace3vf<K> getWorld2LocalSlerp(const vbool<K>& valid, const vfloat<K>& t) const
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{
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vfloat<K> ftime;
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const vint<K> itime_k = timeSegment<K>(t, ftime);
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assert(any(valid));
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const size_t index = bsf(movemask(valid));
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const int itime = itime_k[index];
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if (likely(all(valid, itime_k == vint<K>(itime)))) {
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return rcp(slerp(AffineSpace3vff<K>(local2world[itime+0]),
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AffineSpace3vff<K>(local2world[itime+1]),
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ftime));
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}
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else {
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AffineSpace3vff<K> space0,space1;
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vbool<K> valid1 = valid;
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while (any(valid1)) {
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vbool<K> valid2;
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const int itime = next_unique(valid1, itime_k, valid2);
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space0 = select(valid2, AffineSpace3vff<K>(local2world[itime+0]), space0);
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space1 = select(valid2, AffineSpace3vff<K>(local2world[itime+1]), space1);
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}
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return rcp(slerp(space0, space1, ftime));
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}
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}
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template<int K>
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__forceinline AffineSpace3vf<K> getWorld2LocalLerp(const vbool<K>& valid, const vfloat<K>& t) const
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{
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vfloat<K> ftime;
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const vint<K> itime_k = timeSegment<K>(t, ftime);
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assert(any(valid));
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const size_t index = bsf(movemask(valid));
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const int itime = itime_k[index];
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if (likely(all(valid, itime_k == vint<K>(itime)))) {
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return rcp(lerp(AffineSpace3vf<K>((AffineSpace3fa)local2world[itime+0]),
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AffineSpace3vf<K>((AffineSpace3fa)local2world[itime+1]),
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ftime));
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} else {
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AffineSpace3vf<K> space0,space1;
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vbool<K> valid1 = valid;
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while (any(valid1)) {
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vbool<K> valid2;
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const int itime = next_unique(valid1, itime_k, valid2);
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space0 = select(valid2, AffineSpace3vf<K>((AffineSpace3fa)local2world[itime+0]), space0);
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space1 = select(valid2, AffineSpace3vf<K>((AffineSpace3fa)local2world[itime+1]), space1);
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}
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return rcp(lerp(space0, space1, ftime));
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}
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}
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public:
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Accel* object; //!< pointer to instanced acceleration structure
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AffineSpace3ff* local2world; //!< transformation from local space to world space for each timestep (either normal matrix or quaternion decomposition)
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AffineSpace3fa world2local0; //!< transformation from world space to local space for timestep 0
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};
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namespace isa
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{
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struct InstanceISA : public Instance
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{
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InstanceISA (Device* device)
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: Instance(device) {}
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PrimInfo createPrimRefArray(mvector<PrimRef>& prims, const range<size_t>& r, size_t k, unsigned int geomID) const
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{
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assert(r.begin() == 0);
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assert(r.end() == 1);
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PrimInfo pinfo(empty);
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BBox3fa b = empty;
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if (!buildBounds(0,&b)) return pinfo;
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// const BBox3fa b = bounds(0);
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// if (!isvalid(b)) return pinfo;
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const PrimRef prim(b,geomID,unsigned(0));
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pinfo.add_center2(prim);
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prims[k++] = prim;
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return pinfo;
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}
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PrimInfo createPrimRefArrayMB(mvector<PrimRef>& prims, size_t itime, const range<size_t>& r, size_t k, unsigned int geomID) const
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{
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assert(r.begin() == 0);
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assert(r.end() == 1);
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PrimInfo pinfo(empty);
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BBox3fa b = empty;
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if (!buildBounds(0,&b)) return pinfo;
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// if (!valid(0,range<size_t>(itime))) return pinfo;
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// const PrimRef prim(linearBounds(0,itime).bounds(),geomID,unsigned(0));
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const PrimRef prim(b,geomID,unsigned(0));
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pinfo.add_center2(prim);
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prims[k++] = prim;
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return pinfo;
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}
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PrimInfoMB createPrimRefMBArray(mvector<PrimRefMB>& prims, const BBox1f& t0t1, const range<size_t>& r, size_t k, unsigned int geomID) const
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{
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assert(r.begin() == 0);
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assert(r.end() == 1);
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PrimInfoMB pinfo(empty);
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if (!valid(0, timeSegmentRange(t0t1))) return pinfo;
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const PrimRefMB prim(linearBounds(0,t0t1),this->numTimeSegments(),this->time_range,this->numTimeSegments(),geomID,unsigned(0));
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pinfo.add_primref(prim);
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prims[k++] = prim;
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return pinfo;
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}
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};
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}
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DECLARE_ISA_FUNCTION(Instance*, createInstance, Device*);
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}
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