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added new Perlin coloring function 

New function ot mix two input colors according to perlin noise
This commit is contained in:
Marco Callieri 2016-07-14 18:37:08 +02:00
parent 59ffcd0e55
commit bdec7f527c
1 changed files with 28 additions and 1 deletions
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29
vcg/complex/algorithms/update/color.h
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@ -368,7 +368,6 @@ Note: The faux bit is used to color polygonal faces uniformly
} }
/*! \brief Perlin Noise. /*! \brief Perlin Noise.
\return the number of changed vertexes (the selected ones)
Simple Perlin noise. To make things weirder each color band can have its own offset and frequency. Simple Perlin noise. To make things weirder each color band can have its own offset and frequency.
Period is expressed in absolute terms. Period is expressed in absolute terms.
@ -396,6 +395,34 @@ static void PerVertexPerlinNoise(MeshType& m, CoordType period, CoordType offset
} }
/*! \brief Perlin Color mixing.
Simple Perlin color mixing. Color 1 and 2 are mixed according the perlin noise function, with period and offset.
*/
static void PerVertexPerlinColoring(MeshType& m, Scalarm period, CoordType offset = CoordType(0, 0, 0), Color4b color1 = Color4b(0, 0, 0, 255), Color4b color2 = Color4b(255, 255, 255, 255), bool onSelected = false)
{
RequirePerVertexColor(m);
CoordType p;
for (VertexIterator vi = m.vert.begin(); vi != m.vert.end(); ++vi)
if (!(*vi).IsD())
if ((!onSelected) || ((*vi).IsS()))
{
// perlin noise is defined in 022
p = (vi->P() / period) + offset;
double factor = (math::Perlin::Noise(p[0], p[1], p[2]) + 1.0) / 2.0;
int rr = (color1[0] * factor) + (color2[0] * (1.0 - factor));
int gg = (color1[1] * factor) + (color2[1] * (1.0 - factor));
int bb = (color1[2] * factor) + (color2[2] * (1.0 - factor));
int aa = (color1[3] * factor) + (color2[3] * (1.0 - factor));
(*vi).C() = Color4b(rr, gg, bb, aa);
}
}
/*! \brief Simple Noise adding function. /*! \brief Simple Noise adding function.
It simply add signed noise to the color of the mesh. The noise has uniform distribution and the amplitude is +/-2^(noisebits-1). It simply add signed noise to the color of the mesh. The noise has uniform distribution and the amplitude is +/-2^(noisebits-1).
*/ */