Hallo, ich benutze den Algorithmus, den ich gefunden habe, um Perlin Noise zu erzeugen. Was ich tun möchte, ist schärfere Kanten mit weniger Kurven Picture zu erstellen.Mach Perlin Noise mit scharfen Kanten
private static final double F2 = 0.5*(Math.sqrt(3.0)-1.0);
public float[][] generateSimplexNoise(int w, int h, double fre){
float [][]n = new float[w][h];
double f = fre /(float)w;
for(int i = 0; i < w ; i++){
for(int j = 0; j < h ; j++){
n[i][j] = (float) noise(i*f,j*f);
n[i][j] = (n[i][j]+1)/2; //CONVERTS TO 0-1 SCALE
}
}
return n;
}
// 2D simplex noise
public double noise(double xin, double yin) {
double n0, n1, n2; // Noise contributions from the three corners
// Skew the input space to determine which simplex cell we're in
double s = (xin+yin)*F2; // Hairy factor for 2D
int i = fastfloor(xin+s);
int j = fastfloor(yin+s);
double t = (i+j)*G2;
double X0 = i-t; // Unskew the cell origin back to (x,y) space
double Y0 = j-t;
double x0 = xin-X0; // The x,y distances from the cell origin
double y0 = yin-Y0;
// For the 2D case, the simplex shape is an equilateral triangle.
// Determine which simplex we are in.
int i1, j1; // Offsets for second (middle) corner of simplex in (i,j) coords
if(x0>y0) {i1=1; j1=0;} // lower triangle, XY order: (0,0)->(1,0)->(1,1)
else {i1=0; j1=1;} // upper triangle, YX order: (0,0)->(0,1)->(1,1)
// A step of (1,0) in (i,j) means a step of (1-c,-c) in (x,y), and
// a step of (0,1) in (i,j) means a step of (-c,1-c) in (x,y), where
// c = (3-sqrt(3))/6
double x1 = x0 - i1 + G2; // Offsets for middle corner in (x,y) unskewed coords
double y1 = y0 - j1 + G2;
double x2 = x0 - 1.0 + 2.0 * G2; // Offsets for last corner in (x,y) unskewed coords
double y2 = y0 - 1.0 + 2.0 * G2;
// Work out the hashed gradient indices of the three simplex corners
int ii = i & 255;
int jj = j & 255;
int gi0 = permMod12[ii+perm[jj]];
int gi1 = permMod12[ii+i1+perm[jj+j1]];
int gi2 = permMod12[ii+1+perm[jj+1]];
// Calculate the contribution from the three corners
double t0 = 0.5 - x0*x0-y0*y0;
if(t0<0) n0 = 0.0;
else {
t0 *= t0;
n0 = t0 * t0 * dot(grad3[gi0], x0, y0); // (x,y) of grad3 used for 2D gradient
}
double t1 = 0.5 - x1*x1-y1*y1;
if(t1<0) n1 = 0.0;
else {
t1 *= t1;
n1 = t1 * t1 * dot(grad3[gi1], x1, y1);
}
double t2 = 0.5 - x2*x2-y2*y2;
if(t2<0) n2 = 0.0;
else {
t2 *= t2;
n2 = t2 * t2 * dot(grad3[gi2], x2, y2);
}
// Add contributions from each corner to get the final noise value.
// The result is scaled to return values in the interval [-1,1].
return 65.0 * (n0 + n1 + n2);
}
Mit einem Geräusch niedriger als .25 klassifiziert der Block als Ziegel und alles über .25 wie Gras.
oben ist, was ich verwende, um die Geräusche zu erzeugen und zu einer 0-1 Skala umwandeln. Irgendwelche Ideen/Hilfe, um den Lärm weniger kurvig zu machen?
Von dem Tag-wiki: _Perlin Rauschen prozedural generiert ** ** Gradient Rausch_Misch (Hervorhebung von mir). Der Gradient macht das Aussehen glatt, und ich denke, es ist schwierig, es zu modifizieren, um dein Block-ähnliches Aussehen zu bekommen. – pingul