noisef.cpp

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// $Id: noisef.cpp 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
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              respective authors. See AUTHORS file for details.

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----------------------------------

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 */

#include "camtypes.h"
#include "noisef.h"
#include "vector3d.h"
//#include "errors.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "bitmpinf.h"
//#include "bitmap.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "macros.h"
#include "noisebas.h"
//#include "app.h" - in camtypes.h [AUTOMATICALLY REMOVED]

CC_IMPLEMENT_DYNCREATE(NoiseFractalFill,CCObject);

/********************************************************************************************

    NoiseFractalFill::NoiseFractalFill()
    
    Author:    Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:   16/01/97
    Purpose:   A noise based fill. Really simply defined as the projection of a 3d noise
               function onto a surface.
               For documentation, see Docs\Specs\Textures\Phase1 Spec v1,2 and 3 .doc

********************************************************************************************/

NoiseFractalFill::NoiseFractalFill()
{
}


/********************************************************************************************

>   BOOL NoiseFractalFill::DoFill(double scale, 
                                  double tuber, 
                                  double sweepr, 
                                  KernelBitmap *pBitmap) const
    
    Author:    Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:   16/01/97
    Purpose:   A noise based fill. Really simply defined as the projection of a 3d noise
               function on a torus of given swept radius and tube radius.

********************************************************************************************/
/*
BOOL NoiseFractalFill::DoFill(double scale, 
                              double tuber, 
                              double sweepr, 
                              KernelBitmap *pBitmap) const
{
    // go get the noise manager
    NoiseMan* pNoiseMan = GetApplication()->GetNoiseManager();
    if (pNoiseMan==NULL)
        return FALSE;

    BitmapInfo Info;
    pBitmap->ActualBitmap->GetInfo(&Info);

    INT32 Width  = Info.PixelWidth;
    INT32 Height = Info.PixelHeight;
    
    double n;
    INT32 i,j;
    BYTE cn;
    Vector3D p;

    double theta,phi,sin_phi,cos_phi;

    double vstep = XS_2PI/Height;
    double ustep = XS_2PI/Width;
    double ls = 1.0/scale;

    for (j=0; j<Height; j++)
    {
        phi = j*vstep;
        
        sin_phi = sin(phi);
        cos_phi = cos(phi);

        for (i=0; i<Width; i++)
        {
            theta = i*ustep;

            p.x = sweepr + tuber*cos(theta);
            p.y =          tuber*sin(theta);

            p.z = p.x*sin_phi;
            p.x = p.x*cos_phi;

            p.x *= 8.0;

            // translate into the positive octant
            p.x += sweepr+tuber;
            p.y += tuber;
            p.z += sweepr+tuber;

            // find the noise value at this position
            n = pNoiseMan->NOISE1D(p*ls);
            // turn this into a grey scale
            cn = (BYTE)(n*255.0+0.5);
            // and place it in the bitmap
            pBitmap->PlotPixel(i,j,cn);
        }
    }
    
    return TRUE;
}
*/

/*

BOOL NoiseFractalFill::DoFill(double scale, 
                              double tuber, 
                              double sweepr, 
                              KernelBitmap *pBitmap) const
{
    double      ustep,vstep,ls,n,s,c;
    Vector3D    p;
    BYTE        cn;
    BitmapInfo  Info;
    INT32       Width,Height,i,j;

    // go get the noise manager
    NoiseMan* pNoiseMan = GetApplication()->GetNoiseManager();
    if (pNoiseMan==NULL)
        return FALSE;

    pBitmap->ActualBitmap->GetInfo(&Info);

    Width  = Info.PixelWidth;
    Height = Info.PixelHeight;

    ustep = 1.0/(double)Width;
    vstep = 1.0/(double)Height;
       ls = 1.0/scale;
      p.z = 0.0;

    for (j=0; j<Height; j++)
    {
        p.y = j*vstep*100.0;
        s = sin(2.0*p.y*XS_2PI);
        for (i=0; i<Width; i++)
        {
            p.x = i*ustep*100.0;
            c = s*cos(2.0*p.x*XS_2PI);
            // find the noise value at this position
            n = pNoiseMan->NOISE1D(p*ls);
            // turn this into a grey scale
            cn = (BYTE)(128+n*c*127.0+0.5);
            // and place it in the bitmap
            pBitmap->PlotPixel(i,j,cn);
        }
    }

    return TRUE;
}

*/

/********************************************************************************************

>   BOOL NoiseFractalFill::DoFill(double scale, 
                                  double tuber, 
                                  double sweepr, 
                                  KernelBitmap *pBitmap) const
    
    Author:    Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:   16/01/97
    Purpose:   A noise based fill. This version uses 2d noise built from an array of random
               numbers which are spline interpolated and wrapped at the edges. This is
               dirtier and quicker than the 3d version and is less succeptable to warping
               yet still manages to tile.
    
********************************************************************************************/

BOOL NoiseFractalFill::DoFill(double scale, 
                              UINT32 seed,
                              KernelBitmap *pBitmap) const
{
    double      ustep,vstep,ustart,vstart;
    double      n;
    Vector3D    p;
    BYTE        cn;
    BitmapInfo  Info;
    INT32       Width,Height,i,j;

    // go get the noise manager
    NoiseMan* pNoiseMan = GetApplication()->GetNoiseManager();
    if (pNoiseMan==NULL)
        return FALSE;

    // set the random number generator.
    pNoiseMan->SEEDTABLE(seed);

    pBitmap->ActualBitmap->GetInfo(&Info);

    Width  = Info.PixelWidth;
    Height = Info.PixelHeight;

    ustep = 1.0/(double)Width;
    vstep = 1.0/(double)Height;
    vstart = vstep/2.0;

    p.z = 0.0;
    for (j=0; j<Height; j++)
    {
        p.y = vstart;
        ustart = ustep/2.0;
        for (i=0; i<Width; i++)
        {
            p.x = ustart;
            // find the noise value at this position
            n = pNoiseMan->NOISE1D(p, scale);
            // turn this into a grey scale
            cn = (BYTE)(n*255.0+0.5);
            // and place it in the bitmap
            pBitmap->PlotPixel(i,j,cn);
            ustart += ustep;
        }
        vstart += vstep;
    }

/*  double ng2 = ustep/2.0;
    double ng1 = 1.0 - ng2;

    double n0,n1;
    double t;
    
    vstart = vstep + vstep/2.0;
    for (j=1; j<Height-1; j++)
    {
        p.y = vstart;
        p.x = ng1;
        n0  = pNoiseMan->NOISE1D(p);
        p.x = ng2;
        n1  = pNoiseMan->NOISE1D(p);

        t = 1.0/3.0;
        n = n0 + t*(n1-n0);
        cn = (BYTE)(n*255.0+0.5);
        pBitmap->PlotPixel(Width-1,j,cn);

        t = 2.0/3.0;
        n = n0 + t*(n1-n0);
        cn = (BYTE)(n*255.0+0.5);
        pBitmap->PlotPixel(0,j,cn);
        
        vstart += vstep;
    }
*/
    return TRUE;
}
    

---