160 lines
3.8 KiB
C++
160 lines
3.8 KiB
C++
// This file is part of FexTracker and (C) 2006 by Hajo Krabbenhöft (tentacle)
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// All rights reserved but the aegisub project is allowed to use it.
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// FexTrackerMovement.cpp
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//
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#include "StdAfx.h"
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#include "stdio.h"
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void FexTracker::InfluenceFeatures( int Frame, float x, float y, float off )
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{
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for( int i=0;i<nFeatures;i++ )
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{
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if( Frame < lFeatures[i].StartTime ) continue;
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int FeatureFrame = Frame - lFeatures[i].StartTime;
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if( lFeatures[i].Pos.size() < FeatureFrame ) continue; //feature was lost
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vec2 p = lFeatures[i].Pos[ FeatureFrame ];
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float dist = sqrtf( (p.x-x)*(p.x-x)+(p.y-y)*(p.y-y) );
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float infl = 1/(dist+1);
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if( infl < 0.1 ) continue;
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lFeatures[i].Influence += infl * off;
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if( lFeatures[i].Influence<0 ) lFeatures[i].Influence = 0;
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if( lFeatures[i].Influence>1 ) lFeatures[i].Influence = 1;
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}
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}
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#define VEC2LEN(a) sqrtf( (a).x*(a).x+(a).y*(a).y )
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FexMovement* FexTracker::GetMovement()
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{
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FILE *log = fopen( "movementlog.txt", "wt" );
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int i;
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for( i=0;i<nFeatures;i++ )
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{
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if( lFeatures[i].Influence>0.01 )
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fprintf( log, "Feature(%.2f): %d - %d\n", lFeatures[i].Influence, lFeatures[i].StartTime, lFeatures[i].StartTime+lFeatures[i].Pos.size() );
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}
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FexMovement *m = new FexMovement();
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FexMovementFrame f;
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float FirstInfluenceSum = 0;
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vec2 FirstPos;
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FirstPos.x = FirstPos.y = 0;
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for( i=0;i<nFeatures;i++ )
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{
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if( 0 < lFeatures[i].StartTime ) continue;
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if( lFeatures[i].Pos.size() <= 0 ) continue;
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vec2 p = lFeatures[i].Pos[ 0 ];
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FirstPos.x += p.x * lFeatures[i].Influence;
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FirstPos.y += p.y * lFeatures[i].Influence;
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FirstInfluenceSum += lFeatures[i].Influence;
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}
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FirstPos.x /= FirstInfluenceSum;
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FirstPos.y /= FirstInfluenceSum;
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float FirstLen = 1;
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vec2* MidOffset = (vec2*) new vec2[nFeatures];
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float* MidOffsetLen = (float*) new float[nFeatures];
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for( int Frame = 0; Frame < CurFrame; Frame ++ )
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{
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//set feature offset
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for( i=0;i<nFeatures;i++ )
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{
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if( Frame == lFeatures[i].StartTime )
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{
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MidOffset[i].x = FirstPos.x - lFeatures[i].Pos[0].x;
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MidOffset[i].y = FirstPos.y - lFeatures[i].Pos[0].y;
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//realOffLen / MidOffLen = FirstLen
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// => MidOffLen /= FirstLen;
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MidOffset[i].x /= FirstLen;
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MidOffset[i].y /= FirstLen;
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MidOffsetLen[i] = VEC2LEN( MidOffset[i] );
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}
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}
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//accumulate position
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float NextLen = 0;
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float NextInfluenceSum = 0;
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vec2 NextPos;
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NextPos.x = NextPos.y = 0;
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for( i=0;i<nFeatures;i++ )
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{
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if( Frame < lFeatures[i].StartTime ) continue;
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int FeatureFrame = Frame - lFeatures[i].StartTime;
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if( lFeatures[i].Pos.size() <= FeatureFrame ) continue; //feature was lost
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vec2 p = lFeatures[i].Pos[ FeatureFrame ];
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NextPos.x += (p.x+MidOffset[i].x*FirstLen) * lFeatures[i].Influence;
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NextPos.y += (p.y+MidOffset[i].y*FirstLen) * lFeatures[i].Influence;
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NextInfluenceSum += lFeatures[i].Influence;
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}
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if( NextInfluenceSum > 0.01 )
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{
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NextPos.x /= NextInfluenceSum;
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NextPos.y /= NextInfluenceSum;
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}
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else
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NextPos = FirstPos; //take over last one
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for( i=0;i<nFeatures;i++ )
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{
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if( Frame < lFeatures[i].StartTime ) continue;
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int FeatureFrame = Frame - lFeatures[i].StartTime;
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if( lFeatures[i].Pos.size() <= FeatureFrame ) continue; //feature was lost
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vec2 p = lFeatures[i].Pos[ FeatureFrame ];
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vec2 realMidOff;
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realMidOff.x = NextPos.x-p.x;
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realMidOff.y = NextPos.y-p.y;
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float realMidOffLen = VEC2LEN( realMidOff );
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NextLen += realMidOffLen/MidOffsetLen[i] *lFeatures[i].Influence;
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}
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if( NextInfluenceSum > 0.01 )
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{
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NextLen /= NextInfluenceSum;
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}
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else
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NextLen = FirstLen; //take over last one
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f.Pos = NextPos;
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f.Rot.x = 0;
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f.Rot.y = 0;
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f.Rot.z = 0;
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f.Scale.x = NextLen;
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f.Scale.y = NextLen;
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m->Frames.Add( f );
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FirstPos = NextPos;
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FirstLen = NextLen;
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}
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delete []MidOffset;
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delete []MidOffsetLen;
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fclose( log );
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return m;
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}
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