I was just wondering if anyone found a way of correcting this so I don't have to reinvent the wheel.
I found that if one uses a lighter color for the spec color that the problem is not as noticeable. Like this
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SpecularColor [ 0.180 0.170 0.155 ]Here is the program that does this. It looks and works a lot like nm16 because I used it as a template. I only built it with linux. It builds on Windows but doesn't work. I also recolored my oceans slightly so you may not get the same affect when combined with a unaltered texture. Build it with
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g++ -O3 bmng-spec5.cpp -o bmng-specCode: Select all
bmng-spec5 4096 4096 < testa.rgb > spec-testa.ppmAgain this DOES NOT work with Windows.
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#include <iostream>
#include <cstdio>
#include <stdio.h>
using namespace std;
int start = 2;
int change = 1;
unsigned char readRGB(FILE *in)
{
unsigned char c[1];
fread(c, 1, 1, in);
//fscanf(stdin, %s, &c );
return c[0];
}
unsigned char* readRowRGB(FILE* in, int width)
{
unsigned char* row = new unsigned char[width * 3];
for (int i = 0; i < width * 3; i++)
row[i] = readRGB(in);
return row;
}
int main(int argc, char* argv[])
{
if (argc < 3)
{
cerr << "Usage: bmng-fix <width> <height> \n";
return 1;
}
int width = 0;
int height = 0;
if (sscanf(argv[1], " %d", &width) != 1 ||
sscanf(argv[2], " %d", &height) != 1)
{
cerr << "Bad image dimensions.\n";
return 1;
}
fprintf(stdout, "P6\n");
fprintf(stdout, "%d %d\n255\n", width, height);
unsigned char** samples = new unsigned char*[height];
unsigned char* rgb = new unsigned char[width * 3];
for (int i = 0; i < start - 1; i++)
samples[i] = readRowRGB(stdin, width);
for (int y = 0; y < height; y++)
{
if (y % 100 == 0)
cerr << '[' << y << ']';
if (y > change)
delete[] samples[y - change - 1];
if (y < height - change)
samples[y + change] = readRowRGB(stdin, width);
for (int x = 0; x < width; x++)
{
unsigned char r;
unsigned char g;
unsigned char b;
r = samples[y][x * 3 + 0];
g = samples[y][x * 3 + 1];
b = samples[y][x * 3 + 2];
if ( r <= 0x08 )
r = 0xff,
g = 0xff,
b = 0xff;
else
r = 0x00,
g = 0x00,
b = 0x00;
rgb[x * 3 + 0] = (unsigned char) (r);
rgb[x * 3 + 1] = (unsigned char) (g);
rgb[x * 3 + 2] = (unsigned char) (b);
}
fwrite(rgb, width, 3, stdout);
}
return 0;
}
I'm also trying some other things because this does not include rivers and a lot of the small lakes.
Good Luck,
cartrite
It's hard to believe that you are unaware that I have extracted practically all Celestia data files (except the stars) of the official distribution from scientific catalogs via PERL scripts in the past 
Yet ... these VT textures did it in.