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Added color levels filter. Some bug fixed.

This commit is contained in:
Paolo Cignoni 2008-07-15 22:29:38 +00:00
parent 38323a3c48
commit b9263267ec
1 changed files with 42 additions and 0 deletions
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42
vcg/complex/trimesh/update/color.h
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@ -511,6 +511,48 @@ static float ValuePow(float value, float exponent)
{
return powf(value, exponent);
}
static int Levels(UpdateMeshType &m, float gamma, float in_min, float in_max, float out_min, float out_max, unsigned char rgbMask, const bool ProcessSelected=false)
{
int counter=0;
VertexIterator vi;
for(vi=m.vert.begin();vi!=m.vert.end();++vi) //scan all the vertex...
{
if(!(*vi).IsD()) //if it has not been deleted...
{
if(!ProcessSelected || (*vi).IsS()) //if this vertex has been selected, do transormation
{
(*vi).C() = ColorLevels((*vi).C(), gamma, in_min, in_max, out_min, out_max, rgbMask);
++counter;
}
}
}
return counter;
}
enum rgbChMask {ALL_CHANNELS = 7, RED_CHANNEL = 4, GREEN_CHANNEL = 2, BLUE_CHANNEL = 1, NO_CHANNELS = 0 };
static Color4b ColorLevels(Color4b c, float gamma, float in_min, float in_max, float out_min, float out_max, unsigned char rgbMask)
{
unsigned char r = c[0], g = c[1], b = c[2];
if(rgbMask & RED_CHANNEL) r = ValueLevels(c[0], gamma, in_min, in_max, out_min, out_max);
if(rgbMask & GREEN_CHANNEL) g = ValueLevels(c[1], gamma, in_min, in_max, out_min, out_max);
if(rgbMask & BLUE_CHANNEL) b = ValueLevels(c[2], gamma, in_min, in_max, out_min, out_max);
return Color4b(r, g, b, 255);
}
static int ValueLevels(int value, float gamma, float in_min, float in_max, float out_min, float out_max)
{
float fvalue = value/255.0f;
// normalize
fvalue = math::Clamp<float>(fvalue - in_min, 0.0f, 1.0f) / math::Clamp<float>(in_max - in_min, 1.0f/255.0f, 1.0f);
// transform gamma
fvalue = pow(fvalue,1/gamma);
// rescale range
fvalue = fvalue * (out_max - out_min) + out_min;
//back in interval [0,255] and clamp
return math::Clamp<int>((int)(fvalue * 255), 0, 255);
}
static int Colourisation(UpdateMeshType &m, Color4b c, float intensity, const bool ProcessSelected=false)
{