/**
Draws a VerticalGradient onto a CFbsBitmap from top/color aLo to bottom/aHi
*/
void CTe_graphicsperformanceSuiteStepBase::VerticalGradientAlphaL(CFbsBitmap* aBitmap, TRgb aLo, TRgb aHi)
{
const TSize size = aBitmap->SizeInPixels();
const TDisplayMode mode = aBitmap->DisplayMode();
const TInt scanLineLength = CFbsBitmap::ScanLineLength(size.iWidth, mode);
HBufC8* buffer = HBufC8::NewL(scanLineLength);
CleanupStack::PushL(buffer);
TPtr8 des = buffer->Des();
des.SetLength(scanLineLength);
for(TInt i=0; i<size.iHeight; i++)
{
TRgb color = InterpolateColour(aLo, aHi, i, size.iHeight);
switch(mode)
{
case EGray256:
{
TUint8 g = color.Gray256();
TUint8* p = (TUint8*)des.Ptr();
for(TInt j=0; j<size.iWidth; j++)
{
p[j] = g;
}
}
break;
case EColor64K:
{
TUint16 g = color._Color64K();
TUint16* p = (TUint16*)des.Ptr();
for(TInt j=0; j<size.iWidth/2; j++)
{
p[j] = g;
}
}
break;
case EColor16MU:
{
TUint32 rgba = color._Color16MU();
TUint32* p = (TUint32*)des.Ptr();
for(TInt j=0; j<(size.iWidth/4); j++)
{
p[j] = rgba;
}
}
break;
case EColor16MA:
{
TUint32 rgba = color._Color16MA();
TUint32* p = (TUint32*)des.Ptr();
for(TInt j=0; j<(size.iWidth/4); j++)
{
p[j] = rgba;
}
}
break;
case EColor16MAP:
{
TUint32 rgba = color._Color16MAP();
TUint32* p = (TUint32*)des.Ptr();
for(TInt j=0; j<(size.iWidth/4); j++)
{
p[j] = rgba;
}
}
break;
default:
ASSERT(EFalse);
break;
}
aBitmap->SetScanLine(des, i);
}
CleanupStack::PopAndDestroy(buffer);
}
//-----------------------------------------------------------------------
void MapSplatter::BuildPoint(ColourValue& out, int x, int z, Real& alpha1,
Real& alpha2, Real& alpha3, Real& alpha4)
{
// Init the colour
alpha1 = 0.0f;
alpha2 = 0.0f;
alpha3 = 0.0f;
alpha4 = 0.0f;
#define SNOW 0
#define SAND 1
#define GRASS 2
#define ROCK 3
// Ask for the current height value and the 8 surrounding values
Real height[9];
if ( x == 0 )
{
x = 1;
}
else if (x == int (mWidth))
{
x = mWidth - 1;
}
if ( z == 0 )
{
z = 1;
}
else if (z == int (mHeight))
{
z = mHeight - 1;
}
// /*
// h1
// h0*---*---*h2
// |0 /|2 /|
// | / | / |
// |/ 1|/ 3|
// h3*---h4--*h5
// |7 /|4 /|
// | / | / |
// |/ 6|/ 5|
// h6*---*--*h8
// h7
// */
height[0] = MapUtil::getSingleton().getHeight( x - 1, z - 1 ); // Top-Left
height[1] = MapUtil::getSingleton().getHeight( x, z - 1 ); // Top-Center
height[2] = MapUtil::getSingleton().getHeight( x + 1, z - 1 ); // Top-Right
height[3] = MapUtil::getSingleton().getHeight( x - 1, z ); // Left
height[4] = MapUtil::getSingleton().getHeight( x, z ); // Current Point
height[5] = MapUtil::getSingleton().getHeight( x + 1, z ); // Right
height[6] = MapUtil::getSingleton().getHeight( x - 1, z + 1 ); // Bottom-Left
height[7] = MapUtil::getSingleton().getHeight( x, z + 1 ); // Bottom-Center
height[8] = MapUtil::getSingleton().getHeight( x + 1, z + 1 ); // Bottom-Right
// Weight( pt1 , pt2 ) = 1 - DistanceSquared(pt1,pt2) / (1.75)^2
//The sloppy test
Real sloppy[8];
const Real dx = MapUtil::getSingleton().scale.x;
const Real dz = MapUtil::getSingleton().scale.z;
const Real inv_dxdz = 1.0 / (dx+dz);
const Real inv_dx = 1.0 / dx;
const Real inv_dz = 1.0 / dz;
sloppy[0] = Math::Abs ( height[0] - height[4] ) * inv_dxdz;
sloppy[1] = Math::Abs ( height[1] - height[4] ) * inv_dz;
sloppy[2] = Math::Abs ( height[2] - height[4] ) * inv_dxdz;
sloppy[3] = Math::Abs ( height[3] - height[4] ) * inv_dx;
sloppy[4] = Math::Abs ( height[5] - height[4] ) * inv_dx;
sloppy[5] = Math::Abs ( height[6] - height[4] ) * inv_dxdz;
sloppy[6] = Math::Abs ( height[7] - height[4] ) * inv_dz;
sloppy[7] = Math::Abs ( height[8] - height[4] ) * inv_dxdz;
out = ColourValue(0.0f, 0.0f, 0.0f, 0.0f);
for ( uint i = 0; i < 7; i++ )
{
if ( height[i] < matHeight[0] )
{
if ( sloppy[i] < 0.2f )
{
// grass-grass
InterpolateColour( out, 1.0f, GRASS, GRASS );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 1.0f, GRASS, GRASS );
}
if ( sloppy[i] >= 0.15f && sloppy[i] < 0.4f )
{
// sand-grass
InterpolateColour( out, 0.25f, SAND, GRASS );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 0.25f, SAND, GRASS );
}
if ( sloppy[i] >= 0.3f && sloppy[i] < 0.65f )
{
// sand-sand
InterpolateColour( out, 1.0f, SAND, SAND );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 1.0f, SAND, SAND );
}
if ( sloppy[i] >= 0.55f && sloppy[i] < 0.75f )
{
// sand-rock
InterpolateColour( out, 0.75f, SAND, ROCK );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 0.75f, SAND, ROCK );
}
if ( sloppy[i] >= 0.70 )
{
// rock-rock
InterpolateColour( out, 1.0, ROCK, ROCK );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 1.0f, ROCK, ROCK );
}
}
else if ( height[i] < matHeight[1] )
{
if ( sloppy[i] < 0.15 )
{
// grass-snow
InterpolateColour( out, 0.25f, GRASS, SNOW );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 0.25f, GRASS, SNOW );
}
if ( sloppy[i] >= 0.10 && sloppy[i] < 0.45 )
{
// snow-sand
InterpolateColour( out, 0.65f, SNOW, SAND );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 0.65f, SNOW, SAND );
}
if ( sloppy[i] >= 0.25f && sloppy[i] < 0.65f )
{
// snow-rock
InterpolateColour( out, 0.5, SNOW, ROCK );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 0.5f, SNOW, ROCK );
}
if ( sloppy[i] >= 0.50f && sloppy[i] < 0.75f )
{
// snow-rock
InterpolateColour( out, 0.75f, SNOW, ROCK );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 0.75f, SNOW, ROCK );
}
if ( sloppy[i] >= 0.70 )
{
// rock-rock
InterpolateColour( out, 1.0f, ROCK, ROCK );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 1.0f, ROCK, ROCK );
}
}
else
{
if ( sloppy[i] < 0.15f )
{
// snow-snow
InterpolateColour( out, 1.0f, SNOW, SNOW );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 1.0f, 0, 0 );
}
if ( sloppy[i] >= 0.1f && sloppy[i] < 0.45f )
{
// snow-sand
InterpolateColour( out, 0.35f, SNOW, SAND );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 0.35f, 0, 1 );
}
if ( sloppy[i] >= 0.25f && sloppy[i] < 0.65f )
{
// snow-rock
InterpolateColour( out, 0.5f, SNOW, ROCK );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 0.5f, 0, 3 );
}
if ( sloppy[i] >= 0.5f && sloppy[i] < 0.75f )
{
// snow-rock
InterpolateColour( out, 0.75f, SNOW, ROCK );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 0.75f, 0, 3 );
}
if ( sloppy[i] >= 0.7f )
{
// rock-rock
InterpolateColour( out, 1.0f, ROCK, ROCK );
InterpolateAlpha( alpha1, alpha2, alpha3, alpha4, 1.0f, 3, 3 );
}
}
}
}
