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/*
* Copyright 2015, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef PTC_ABC_INTERPOLATE_H
#define PTC_ABC_INTERPOLATE_H
#include <Alembic/Abc/ISampleSelector.h>
#include <Alembic/Abc/IScalarProperty.h>
#include <Alembic/Abc/TypedPropertyTraits.h>
#include <Alembic/Abc/ITypedArrayProperty.h>
#include <Alembic/Abc/ITypedScalarProperty.h>
#include <Alembic/Abc/TypedArraySample.h>
extern "C" {
#include "BLI_math.h"
#include "BLI_utildefines.h"
}
namespace PTC {
using namespace Alembic;
using namespace Abc;
using Alembic::Util::shared_ptr;
enum InterpolateSemanticDefault {
InterpolateSemanticDefault_None = 0,
};
enum InterpolateSemanticVector {
InterpolateSemanticVector_Linear = 0,
InterpolateSemanticVector_Slerp = 1,
};
/* linear blending for primitive types */
template <typename T>
BLI_INLINE T interpolate_sample(const T &val0, const T &val1, float t)
{
return val0 * (1.0f-t) + val1 * t;
}
/* vector semantics */
BLI_INLINE V3f interpolate_sample(const V3f &val0, const V3f &val1, float t, InterpolateSemanticVector semantic)
{
switch (semantic) {
case InterpolateSemanticVector_Linear:
return val0 * (1.0f-t) + val1 * t;
case InterpolateSemanticVector_Slerp:
V3f result;
interp_v3_v3v3_slerp_safe(result.getValue(), val0.getValue(), val1.getValue(), t);
return result;
}
return V3f(0.0f, 0.0f, 0.0f);
}
BLI_INLINE Quatf interpolate_sample(const Quatf &val0, const Quatf &val1, float t)
{
float qt0[4] = {val0.r, val0.v.x, val0.v.y, val0.v.z};
float qt1[4] = {val1.r, val1.v.x, val1.v.y, val1.v.z};
float result[4];
interp_qt_qtqt(result, qt0, qt1, t);
return Quatf(result[0], result[1], result[2], result[3]);
}
BLI_INLINE M44f interpolate_sample(const M44f &val0, const M44f &val1, float t)
{
float loc[3], quat[4], size[3];
float loc0[3], quat0[4], size0[3];
float loc1[3], quat1[4], size1[3];
mat4_decompose(loc0, quat0, size0, (float (*)[4])val0.getValue());
mat4_decompose(loc1, quat1, size1, (float (*)[4])val1.getValue());
/* linear interpolation for rotation and scale */
interp_v3_v3v3(loc, loc0, loc1, t);
/* use simpe nlerp instead of slerp. it's faster and almost the same */
interp_v4_v4v4(quat, quat0, quat1, t);
normalize_qt(quat);
interp_v3_v3v3(size, size0, size1, t);
M44f result;
loc_quat_size_to_mat4((float (*)[4])result.getValue(), loc, quat, size);
return result;
}
/* ------------------------------------------------------------------------- */
/* These wrapper types allow calling all the interpolate_sample variants without knowing the semantics type
* structs are required for this, since partial specialization does not work with functions.
*/
/* forward declaration */
template <typename ArraySampleT, typename SemanticT>
BLI_INLINE shared_ptr<ArraySampleT> interpolate_sample(const ArraySampleT &val0, const ArraySampleT &val1, float t, SemanticT semantic);
template <typename T, typename SemanticT>
struct InterpolateSampleCaller {
BLI_INLINE T call(const T &val0, const T &val1, float t, SemanticT semantic)
{
return interpolate_sample(val0, val1, t, semantic);
}
};
template <typename T>
struct InterpolateSampleCaller<T, InterpolateSemanticDefault> {
BLI_INLINE T call(const T &val0, const T &val1, float t, InterpolateSemanticDefault)
{
return interpolate_sample(val0, val1, t);
}
};
/* ------------------------------------------------------------------------- */
/* Scalar Properties */
template <typename PropT, typename SemanticT>
typename PropT::value_type abc_interpolate_sample_linear(const PropT &prop, chrono_t time, SemanticT semantic)
{
typedef typename PropT::value_type value_type;
ISampleSelector ss0(time, ISampleSelector::kFloorIndex);
ISampleSelector ss1(time, ISampleSelector::kCeilIndex);
index_t index0 = ss0.getIndex(prop.getTimeSampling(), prop.getNumSamples());
index_t index1 = ss1.getIndex(prop.getTimeSampling(), prop.getNumSamples());
if (index0 == index1) {
/* no interpolation needed */
return prop.getValue(ss0);
}
else {
chrono_t time0 = prop.getTimeSampling()->getSampleTime(index0);
chrono_t time1 = prop.getTimeSampling()->getSampleTime(index1);
float t = (time1 > time0) ? (time - time0) / (time1 - time0) : 0.0f;
return InterpolateSampleCaller<value_type, SemanticT>::call(prop.getValue(ss0), prop.getValue(ss1), t, semantic);
}
}
template <typename PropT>
typename PropT::value_type abc_interpolate_sample_linear(const PropT &prop, chrono_t time)
{
return abc_interpolate_sample_linear(prop, time, InterpolateSemanticDefault_None);
}
/* Array Properties */
template <typename ArraySampleT, typename SemanticT>
BLI_INLINE shared_ptr<ArraySampleT> interpolate_array_sample(const ArraySampleT &val0, const ArraySampleT &val1, float t, SemanticT semantic)
{
typedef ArraySampleT sample_type;
typedef shared_ptr<ArraySampleT> sample_ptr_type;
typedef typename ArraySampleT::value_type value_type;
size_t size0 = val0.size();
size_t size1 = val1.size();
size_t maxsize = size0 > size1 ? size0 : size1;
size_t minsize = size0 < size1 ? size0 : size1;
const value_type *data0 = val0.get();
const value_type *data1 = val1.get();
value_type *result = new value_type[maxsize];
value_type *data = result;
for (size_t i = 0; i < minsize; ++i) {
*data = InterpolateSampleCaller<value_type, SemanticT>::call(*data0, *data1, t, semantic);
++data;
++data0;
++data1;
}
if (size0 > minsize) {
for (size_t i = minsize; i < size0; ++i) {
*data = *data0;
++data;
++data0;
}
}
else if (size1 > minsize) {
for (size_t i = minsize; i < size1; ++i) {
*data = *data1;
++data;
++data1;
}
}
return sample_ptr_type(new sample_type(result, maxsize));
}
template <typename TraitsT, typename SemanticT>
shared_ptr<typename ITypedArrayProperty<TraitsT>::sample_type> abc_interpolate_sample_linear(const ITypedArrayProperty<TraitsT> &prop, chrono_t time, SemanticT semantic)
{
ISampleSelector ss0(time, ISampleSelector::kFloorIndex);
ISampleSelector ss1(time, ISampleSelector::kCeilIndex);
index_t index0 = ss0.getIndex(prop.getTimeSampling(), prop.getNumSamples());
index_t index1 = ss1.getIndex(prop.getTimeSampling(), prop.getNumSamples());
if (index0 == index1) {
/* no interpolation needed */
return prop.getValue(ss0);
}
else {
chrono_t time0 = prop.getTimeSampling()->getSampleTime(index0);
chrono_t time1 = prop.getTimeSampling()->getSampleTime(index1);
float t = (time1 > time0) ? (time - time0) / (time1 - time0) : 0.0f;
return interpolate_array_sample(*prop.getValue(ss0), *prop.getValue(ss1), t, semantic);
}
}
template <typename TraitsT>
shared_ptr<typename ITypedArrayProperty<TraitsT>::sample_type> abc_interpolate_sample_linear(const ITypedArrayProperty<TraitsT> &prop, chrono_t time)
{
return abc_interpolate_sample_linear(prop, time, InterpolateSemanticDefault_None);
}
} /* namespace PTC */
#endif /* PTC_ABC_INTERPOLATE_H */
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