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@zloop1982
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Last active August 29, 2015 14:20
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/*
Delta Compression (Round 2) by Glenn Fiedler.
This source code is placed in the public domain.
http://gafferongames.com/2015/03/14/the-networked-physics-data-compression-challenge/
*/
#include <stdint.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <math.h>
static const int NumCubes = 901;
template <typename T> const T & max( const T & a, const T & b )
{
return ( a > b ) ? a : b;
}
struct FrameCubeData
{
float orientation_x;
float orientation_y;
float orientation_z;
float orientation_w;
float position_x;
float position_y;
float position_z;
};
struct Frame
{
FrameCubeData cubes[NumCubes];
};
int main( int argc, char ** argv )
{
FILE * file = fopen( "delta_data_round_two.bin", "rb" );
if ( !file )
{
printf( "error: can't open file\n" );
return 1;
}
// count number of frames in file
fseek( file, 0L, SEEK_END );
uint64_t file_size = ftell( file );
fseek( file, 0L, SEEK_SET );
const int num_frames = (int) floor( double(file_size) / sizeof( Frame ) );
printf( "%d input frames\n", num_frames );
assert( num_frames > 6 );
// read in frames
Frame * frames = new Frame[num_frames];
uint64_t frames_read = fread( frames, sizeof( Frame ), num_frames, file );
assert( frames_read == num_frames );
fclose( file );
// output orientation, base orientation, and base base orientation to text file
FILE * output_file = fopen( "orientation_values.txt", "w" );
for ( int i = 6; i < num_frames; ++i )
{
const Frame & current = frames[i];
const Frame & base = frames[max(0,i-6)];
const Frame & base_base = frames[max(0,i-6*2)];
for ( int j = 0; j < NumCubes; ++j )
{
fprintf( output_file, "%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",
current.cubes[j].orientation_x,
current.cubes[j].orientation_y,
current.cubes[j].orientation_z,
current.cubes[j].orientation_w,
base.cubes[j].orientation_x,
base.cubes[j].orientation_y,
base.cubes[j].orientation_z,
base.cubes[j].orientation_w,
base_base.cubes[j].orientation_x,
base_base.cubes[j].orientation_y,
base_base.cubes[j].orientation_z,
base_base.cubes[j].orientation_w );
}
}
fclose( output_file );
// clean up everything
delete [] frames;
return 0;
}
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