void CScratchPadGraph::AddVerticalLine( float flTime, float flMinValue, float flMaxValue, const CSPColor &vColor )
{
Vector v1 = GetSamplePosition( flTime, flMinValue );
Vector v2 = GetSamplePosition( flTime, flMaxValue );
m_pPad->DrawLine(
CSPVert( v1, vColor ),
CSPVert( v2, vColor ) );
}
void CScratchPadGraph::AddSample( LineID iLine, float flTime, float flValue )
{
CScratchPadGraph::CLineInfo *pInfo = &m_LineInfos[iLine];
UpdateTicksAndStuff( flTime, flValue );
if ( !pInfo->m_bFirst )
{
// Draw a line from the last value to the current one.
Vector vStart = GetSamplePosition( pInfo->m_flLastTime, pInfo->m_flLastValue );
Vector vEnd = GetSamplePosition( flTime, flValue );
m_pPad->DrawLine(
CSPVert( vStart, pInfo->m_vColor ),
CSPVert( vEnd, pInfo->m_vColor )
);
}
pInfo->m_flLastTime = flTime;
pInfo->m_flLastValue = flValue;
pInfo->m_bFirst = false;
}
int YsWavFile::GetSignedValue(int atTimeStep,int channel) const
{
const size_t sampleIdx=GetSamplePosition(atTimeStep);
const size_t unitSize=GetUnitSize();
if(sampleIdx+unitSize<=sizeInBytes && 0<=channel && channel<GetNumChannel())
{
int rawSignedValue=0;
size_t offset=sampleIdx+channel*BytePerSample();
switch(BitPerSample())
{
case 8:
if(YSTRUE==isSigned)
{
rawSignedValue=dat[offset];
if(128<=rawSignedValue)
{
rawSignedValue-=256;
}
}
else
{
rawSignedValue=dat[offset]-128;
}
break;
case 16:
// Assume little endian
rawSignedValue=dat[offset]+256*dat[offset+1];
if(YSTRUE==isSigned)
{
if(32768<=rawSignedValue)
{
rawSignedValue-=65536;
}
}
else
{
rawSignedValue-=32768;
}
break;
}
return rawSignedValue;
}
return 0;
}
void CScratchPadGraph::UpdateTicksAndStuff( float flTime, float flValue )
{
if ( flTime > m_flHighestTime )
{
// Update the left part of the time axis.
Vector vStart = GetSamplePosition( m_flHighestTime, m_flValueOrigin );
Vector vEnd = GetSamplePosition( flTime, m_flValueOrigin );
m_pPad->DrawLine(
CSPVert( vStart, m_vTimeLineColor ),
CSPVert( vEnd, m_vTimeLineColor )
);
m_flHighestTime = flTime;
}
if ( flValue > m_flHighestValue )
{
// Update the left part of the time axis.
Vector vStart = GetSamplePosition( m_flTimeOrigin, m_flHighestValue );
Vector vEnd = GetSamplePosition( m_flTimeOrigin, flValue );
m_pPad->DrawLine(
CSPVert( vStart, m_vValueLineColor ),
CSPVert( vEnd, m_vValueLineColor )
);
// Extend the lines attached to the time labels.
for ( int i=0; i < m_nTimeLabelsDrawn; i++ )
{
float flTime = m_flTimeOrigin + m_nTimeLabelsDrawn * m_flTimeLabelEveryNSeconds;
m_pPad->DrawLine(
CSPVert((const Vector&) GetSamplePosition( flTime, m_flHighestValue )),
CSPVert((const Vector&) GetSamplePosition( flTime, flValue ) )
);
}
m_flHighestValue = flValue;
}
// More text labels?
int iHighestTextLabel = (int)ceil( (flTime - m_flTimeOrigin) / m_flTimeLabelEveryNSeconds + 0.5f );
while ( m_nTimeLabelsDrawn < iHighestTextLabel )
{
CTextParams params;
float flTime = m_flTimeOrigin + m_nTimeLabelsDrawn * m_flTimeLabelEveryNSeconds;
params.m_bSolidBackground = true;
params.m_vPos = GetSamplePosition( flTime, m_flValueOrigin-5 );
params.m_bTwoSided = true;
char str[512];
Q_snprintf( str, sizeof( str ), "time: %.2f", flTime );
m_pPad->DrawText( str, params );
// Now draw the vertical line for the value..
m_pPad->DrawLine(
CSPVert( (const Vector&)GetSamplePosition( flTime, m_flValueOrigin ) ),
CSPVert( (const Vector&)GetSamplePosition( flTime, m_flHighestValue ) )
);
m_nTimeLabelsDrawn++;
}
}
