//-----------------------------------------------------------------------------
// Purpose: Retrieve sprite object and set it up for rendering
// Input : *pSpriteModel -
// frame -
// rendermode -
// Output : CEngineSprite
//-----------------------------------------------------------------------------
CEngineSprite *Draw_SetSpriteTexture( const model_t *pSpriteModel, int frame, int rendermode )
{
CEngineSprite *psprite;
IMaterial *material;
psprite = ( CEngineSprite * )modelinfo->GetModelExtraData( pSpriteModel );
Assert( psprite );
material = psprite->GetMaterial();
if( !material )
return NULL;
CMatRenderContextPtr pRenderContext( materials );
if ( ShouldDrawInWireFrameMode() || r_DrawBeams.GetInt() == 2 )
{
if ( !g_pBeamWireframeMaterial )
g_pBeamWireframeMaterial = materials->FindMaterial( "shadertest/wireframevertexcolor", TEXTURE_GROUP_OTHER );
pRenderContext->Bind( g_pBeamWireframeMaterial, NULL );
return psprite;
}
psprite->SetFrame( frame );
psprite->SetRenderMode( rendermode );
pRenderContext->Bind( material );
return psprite;
}
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
int CSpriteTrail::DrawModel( int flags )
{
VPROF_BUDGET( "CSpriteTrail::DrawModel", VPROF_BUDGETGROUP_PARTICLE_RENDERING );
// Must have at least one point
if ( m_nStepCount < 1 )
return 1;
//See if we should draw
if ( !IsVisible() || ( m_bReadyToDraw == false ) )
return 0;
CEngineSprite *pSprite = Draw_SetSpriteTexture( GetModel(), m_flFrame, GetRenderMode() );
if ( pSprite == NULL )
return 0;
// Specify all the segments.
CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
CBeamSegDraw segDraw;
segDraw.Start( pRenderContext, m_nStepCount + 1, pSprite->GetMaterial() );
// Setup the first point, always emanating from the attachment point
TrailPoint_t *pLast = GetTrailPoint( m_nStepCount-1 );
TrailPoint_t currentPoint;
currentPoint.m_flDieTime = gpGlobals->curtime + m_flLifeTime;
ComputeScreenPosition( ¤tPoint.m_vecScreenPos );
currentPoint.m_flTexCoord = pLast->m_flTexCoord + currentPoint.m_vecScreenPos.DistTo(pLast->m_vecScreenPos) * m_flTextureRes;
currentPoint.m_flWidthVariance = 0.0f;
#if SCREEN_SPACE_TRAILS
VMatrix viewMatrix;
materials->GetMatrix( MATERIAL_VIEW, &viewMatrix );
viewMatrix = viewMatrix.InverseTR();
#endif
TrailPoint_t *pPrevPoint = NULL;
float flTailAlphaDist = m_flMinFadeLength;
for ( int i = 0; i <= m_nStepCount; ++i )
{
// This makes it so that we're always drawing to the current location
TrailPoint_t *pPoint = (i != m_nStepCount) ? GetTrailPoint(i) : ¤tPoint;
float flLifePerc = (pPoint->m_flDieTime - gpGlobals->curtime) / m_flLifeTime;
flLifePerc = clamp( flLifePerc, 0.0f, 1.0f );
BeamSeg_t curSeg;
curSeg.m_vColor.x = (float) m_clrRender->r / 255.0f;
curSeg.m_vColor.y = (float) m_clrRender->g / 255.0f;
curSeg.m_vColor.z = (float) m_clrRender->b / 255.0f;
float flAlphaFade = flLifePerc;
if ( flTailAlphaDist > 0.0f )
{
if ( pPrevPoint )
{
float flDist = pPoint->m_vecScreenPos.DistTo( pPrevPoint->m_vecScreenPos );
flTailAlphaDist -= flDist;
}
if ( flTailAlphaDist > 0.0f )
{
float flTailFade = Lerp( (m_flMinFadeLength - flTailAlphaDist) / m_flMinFadeLength, 0.0f, 1.0f );
if ( flTailFade < flAlphaFade )
{
flAlphaFade = flTailFade;
}
}
}
curSeg.m_flAlpha = ( (float) GetRenderBrightness() / 255.0f ) * flAlphaFade;
#if SCREEN_SPACE_TRAILS
curSeg.m_vPos = viewMatrix * pPoint->m_vecScreenPos;
#else
curSeg.m_vPos = pPoint->m_vecScreenPos;
#endif
if ( m_flEndWidth >= 0.0f )
{
curSeg.m_flWidth = Lerp( flLifePerc, m_flEndWidth.Get(), m_flStartWidth.Get() );
}
else
{
curSeg.m_flWidth = m_flStartWidth.Get();
}
curSeg.m_flWidth += pPoint->m_flWidthVariance;
if ( curSeg.m_flWidth < 0.0f )
{
curSeg.m_flWidth = 0.0f;
}
curSeg.m_flTexCoord = pPoint->m_flTexCoord;
segDraw.NextSeg( &curSeg );
// See if we're done with this bad boy
if ( pPoint->m_flDieTime <= gpGlobals->curtime )
{
// Push this back onto the top for use
++m_nFirstStep;
--i;
--m_nStepCount;
}
pPrevPoint = pPoint;
}
segDraw.End();
return 1;
}
//-----------------------------------------------------------------------------
// Purpose:
// Input : noise_divisions -
// *prgNoise -
// *spritemodel -
// frame -
// rendermode -
// source -
// delta -
// flags -
// *color -
// fadescale -
//-----------------------------------------------------------------------------
void DrawSegs( int noise_divisions, float *prgNoise, const model_t* spritemodel,
float frame, int rendermode, const Vector& source, const Vector& delta,
float startWidth, float endWidth, float scale, float freq, float speed, int segments,
int flags, float* color, float fadeLength, float flHDRColorScale )
{
int i, noiseIndex, noiseStep;
float div, length, fraction, factor, vLast, vStep, brightness;
Assert( fadeLength >= 0.0f );
CEngineSprite *pSprite = Draw_SetSpriteTexture( spritemodel, frame, rendermode );
if ( !pSprite )
return;
if ( segments < 2 )
return;
IMaterial *pMaterial = pSprite->GetMaterial( (RenderMode_t)rendermode );
if( pMaterial )
{
static unsigned int nHDRColorScaleCache = 0;
IMaterialVar *pHDRColorScaleVar = pMaterial->FindVarFast( "$hdrcolorscale", &nHDRColorScaleCache );
if( pHDRColorScaleVar )
{
pHDRColorScaleVar->SetFloatValue( flHDRColorScale );
}
}
length = VectorLength( delta );
float flMaxWidth = MAX(startWidth, endWidth) * 0.5f;
div = 1.0 / (segments-1);
if ( length*div < flMaxWidth * 1.414 )
{
// Here, we have too many segments; we could get overlap... so lets have less segments
segments = (int)(length / (flMaxWidth * 1.414)) + 1;
if ( segments < 2 )
{
segments = 2;
}
}
if ( segments > noise_divisions ) // UNDONE: Allow more segments?
{
segments = noise_divisions;
}
div = 1.0 / (segments-1);
length *= 0.01;
// UNDONE: Expose texture length scale factor to control "fuzziness"
if ( flags & FBEAM_NOTILE )
{
// Don't tile
vStep = div;
}
else
{
// Texture length texels per space pixel
vStep = length*div;
}
// UNDONE: Expose this paramter as well(3.5)? Texture scroll rate along beam
vLast = fmod(freq*speed,1); // Scroll speed 3.5 -- initial texture position, scrolls 3.5/sec (1.0 is entire texture)
if ( flags & FBEAM_SINENOISE )
{
if ( segments < 16 )
{
segments = 16;
div = 1.0 / (segments-1);
}
scale *= 100;
length = segments * (1.0/10);
}
else
{
scale *= length;
}
// Iterator to resample noise waveform (it needs to be generated in powers of 2)
noiseStep = (int)((float)(noise_divisions-1) * div * 65536.0f);
noiseIndex = 0;
if ( flags & FBEAM_SINENOISE )
{
noiseIndex = 0;
}
brightness = 1.0;
if ( flags & FBEAM_SHADEIN )
{
brightness = 0;
}
// What fraction of beam should be faded
Assert( fadeLength >= 0.0f );
float fadeFraction = fadeLength/ delta.Length();
// BUGBUG: This code generates NANs when fadeFraction is zero! REVIST!
fadeFraction = clamp(fadeFraction,1.e-6f,1.f);
// Choose two vectors that are perpendicular to the beam
Vector perp1;
ComputeBeamPerpendicular( delta, &perp1 );
// Specify all the segments.
CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
CBeamSegDraw segDraw;
segDraw.Start( pRenderContext, segments, NULL );
for ( i = 0; i < segments; i++ )
{
Assert( noiseIndex < (noise_divisions<<16) );
BeamSeg_t curSeg;
curSeg.m_flAlpha = 1;
fraction = i * div;
// Fade in our out beam to fadeLength
if ( (flags & FBEAM_SHADEIN) && (flags & FBEAM_SHADEOUT) )
{
if (fraction < 0.5)
{
brightness = 2*(fraction/fadeFraction);
}
else
{
brightness = 2*(1.0 - (fraction/fadeFraction));
}
}
else if ( flags & FBEAM_SHADEIN )
{
brightness = fraction/fadeFraction;
}
else if ( flags & FBEAM_SHADEOUT )
{
brightness = 1.0 - (fraction/fadeFraction);
}
// clamps
if (brightness < 0 )
{
brightness = 0;
}
else if (brightness > 1)
{
brightness = 1;
}
VectorScale( *((Vector*)color), brightness, curSeg.m_vColor );
// UNDONE: Make this a spline instead of just a line?
VectorMA( source, fraction, delta, curSeg.m_vPos );
// Distort using noise
if ( scale != 0 )
{
factor = prgNoise[noiseIndex>>16] * scale;
if ( flags & FBEAM_SINENOISE )
{
float s, c;
SinCos( fraction*M_PI*length + freq, &s, &c );
VectorMA( curSeg.m_vPos, factor * s, CurrentViewUp(), curSeg.m_vPos );
// Rotate the noise along the perpendicluar axis a bit to keep the bolt from looking diagonal
VectorMA( curSeg.m_vPos, factor * c, CurrentViewRight(), curSeg.m_vPos );
}
else
{
VectorMA( curSeg.m_vPos, factor, perp1, curSeg.m_vPos );
}
}
// Specify the next segment.
if( endWidth == startWidth )
{
curSeg.m_flWidth = startWidth * 2;
}
else
{
curSeg.m_flWidth = ((fraction*(endWidth-startWidth))+startWidth) * 2;
}
curSeg.m_flTexCoord = vLast;
segDraw.NextSeg( &curSeg );
vLast += vStep; // Advance texture scroll (v axis only)
noiseIndex += noiseStep;
}
