// --- Methods inherited from Texmap ---
RGBA Planet::EvalColor(ShadeContext& sc) {
float d, x, y, z;
RGBA color;
// After being evaluated, if a map or material has a non-zero gbufID,
// it should call ShadeContext::SetGBuffer() to store it into
// the shade context.
if (gbufID)
sc.SetGBufferID(gbufID);
// Use the XYZGen instance to get a transformed point from the
// ShadeContext.
Point3 p, dp;
xyzGen->GetXYZ(sc, p, dp);
if (size == 0.0f)
size = 0.0001f;
x = p.x/size;
y = p.y/size;
z = p.z/size;
d = NoiseFunc(x, y, z);
if (d < land) {
float frac;
int index;
d = d/land*3.0f;
index = (int)d;
frac = d-(float)index;
if (index < 2)
color = (1.0f-frac)*col[index]+frac*col[index+1];
else {
if (blend)
color = (1.0f-frac)*col[2]+frac*col[3];
else
color = col[2];
}
}
else {
float divfac, frac;
int index;
divfac = 1.0f-land;
if (divfac==0.0) divfac = .000001f;
d = (d-land)/divfac*5;
index = (int)d;
frac = d-(float)index;
if (index < 4)
color = (1.0f-frac)*col[index+3]+frac*col[index+4];
else
color = col[7];
}
return color;
}
float Gradient::gradFunc(float u, float v) {
float a;
if (type==GRAD_LINEAR) {
a = v;
} else {
u-=0.5f;
v-=0.5f;
a = (float)sqrt(u*u+v*v)*2.0f;
if (a>1.0f) a = 1.0f;
}
if (amount!=0.0f) {
a += amount*NoiseFunc(Point3(u*size1+1.0f,v*size1+1.0f,phase));
if (a<0.0f) a = 0.0f;
if (a>1.0f) a = 1.0f;
}
// a = (a*a*(3-2*a));
return a;
}
void ClassicNoise::Generate(QImage *image)
{
double x;
double y;
double z = time;
double c;
double cmin = 1000.0;
double cmax = -1000.0;
uint8_t color = 0;
uint32_t color32 = 0;
time += 0.1;
int width = image->width();
int height = image->height();
for (int iy = 0; iy < height; iy++) {
y = static_cast<double>(iy) / 10.0;
for (int ix = 0; ix < width; ix++) {
x = static_cast<double>(ix) / 10.0;
c = NoiseFunc(x, y, z);
cmin = c < cmin ? c : cmin;
cmax = c > cmax ? c : cmax;
color = (((c + 1.0) / 2.0) * 255);
color32 = 0x00000000
| (color << 16)
| (color << 8)
| (color);
image->setPixel(QPoint(ix, iy), color32);
}
}
// qDebug("func: %f - %f\n", cmin, cmax);
}
float Planet::BumpFunc(Point3 p) {
float f = NoiseFunc(p.x,p.y,p.z);
return (f<land)?land:f;
}
