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//
// Test_3x3getRot.cpp
// BulletTest
//
// Copyright (c) 2011 Apple Inc.
//
#include "LinearMath/btScalar.h"
#if defined(BT_USE_SSE_IN_API) || defined(BT_USE_NEON)
#include "Test_3x3getRot.h"
#include "vector.h"
#include "Utils.h"
#include "main.h"
#include <math.h>
#include <string.h>
#include <LinearMath/btMatrix3x3.h>
#define LOOPCOUNT 1000
#define ARRAY_SIZE 128
static inline btSimdFloat4 rand_f4(void)
{
return btAssign128(RANDF_m1p1, RANDF_m1p1, RANDF_m1p1, BT_NAN); // w channel NaN
}
static inline btSimdFloat4 qtNAN_f4(void)
{
return btAssign128(BT_NAN, BT_NAN, BT_NAN, BT_NAN);
}
static void M3x3getRot_ref(const btMatrix3x3 &m, btQuaternion &q)
{
btVector3 m_el[3] = {m[0], m[1], m[2]};
btScalar trace = m_el[0].x() + m_el[1].y() + m_el[2].z();
btScalar temp[4];
if (trace > btScalar(0.0))
{
btScalar s = btSqrt(trace + btScalar(1.0));
temp[3] = (s * btScalar(0.5));
s = btScalar(0.5) / s;
temp[0] = ((m_el[2].y() - m_el[1].z()) * s);
temp[1] = ((m_el[0].z() - m_el[2].x()) * s);
temp[2] = ((m_el[1].x() - m_el[0].y()) * s);
}
else
{
int i = m_el[0].x() < m_el[1].y() ? (m_el[1].y() < m_el[2].z() ? 2 : 1) : (m_el[0].x() < m_el[2].z() ? 2 : 0);
int j = (i + 1) % 3;
int k = (i + 2) % 3;
btScalar s = btSqrt(m_el[i][i] - m_el[j][j] - m_el[k][k] + btScalar(1.0));
temp[i] = s * btScalar(0.5);
s = btScalar(0.5) / s;
temp[3] = (m_el[k][j] - m_el[j][k]) * s;
temp[j] = (m_el[j][i] + m_el[i][j]) * s;
temp[k] = (m_el[k][i] + m_el[i][k]) * s;
}
q.setValue(temp[0], temp[1], temp[2], temp[3]);
}
static int operator!=(const btQuaternion &a, const btQuaternion &b)
{
if (fabs(a.x() - b.x()) +
fabs(a.y() - b.y()) +
fabs(a.z() - b.z()) +
fabs(a.w() - b.w()) >
FLT_EPSILON * 4)
return 1;
return 0;
}
int Test_3x3getRot(void)
{
// Init an array flanked by guard pages
btMatrix3x3 in1[ARRAY_SIZE];
btQuaternion out[ARRAY_SIZE];
btQuaternion out2[ARRAY_SIZE];
// Init the data
size_t i, j;
for (i = 0; i < ARRAY_SIZE; i++)
{
in1[i] = btMatrix3x3(rand_f4(), rand_f4(), rand_f4());
out[i] = btQuaternion(qtNAN_f4());
out2[i] = btQuaternion(qtNAN_f4());
M3x3getRot_ref(in1[i], out[i]);
in1[i].getRotation(out2[i]);
if (out[i] != out2[i])
{
vlog("Error - M3x3getRot result error! ");
vlog("failure @ %ld\n", i);
vlog(
"\ncorrect = (%10.7f, %10.7f, %10.7f, %10.7f) "
"\ntested = (%10.7f, %10.7f, %10.7f, %10.7f) \n",
out[i].x(), out[i].y(), out[i].z(), out[i].w(),
out2[i].x(), out2[i].y(), out2[i].z(), out2[i].w());
return -1;
}
}
uint64_t scalarTime, vectorTime;
uint64_t startTime, bestTime, currentTime;
bestTime = ~(bestTime & 0); //-1ULL;
scalarTime = 0;
for (j = 0; j < LOOPCOUNT; j++)
{
startTime = ReadTicks();
for (i = 0; i < ARRAY_SIZE; i++)
M3x3getRot_ref(in1[i], out[i]);
currentTime = ReadTicks() - startTime;
scalarTime += currentTime;
if (currentTime < bestTime)
bestTime = currentTime;
}
if (0 == gReportAverageTimes)
scalarTime = bestTime;
else
scalarTime /= LOOPCOUNT;
bestTime = ~(bestTime & 0); //-1ULL;
vectorTime = 0;
for (j = 0; j < LOOPCOUNT; j++)
{
startTime = ReadTicks();
for (i = 0; i < ARRAY_SIZE; i++)
{
in1[i].getRotation(out2[i]);
}
currentTime = ReadTicks() - startTime;
vectorTime += currentTime;
if (currentTime < bestTime)
bestTime = currentTime;
}
if (0 == gReportAverageTimes)
vectorTime = bestTime;
else
vectorTime /= LOOPCOUNT;
vlog("Timing:\n");
vlog("\t scalar\t vector\n");
vlog("\t%10.2f\t%10.2f\n", TicksToCycles(scalarTime) / ARRAY_SIZE, TicksToCycles(vectorTime) / ARRAY_SIZE);
return 0;
}
#endif //BT_USE_SSE
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