float compute_height_field(int x, int y)
{
float ht = AVG_GROUND;
#if 1
float weight=0;
int o;
weight = (float) stb_linear_remap(stb_perlin_noise3(x/256.0f,y/256.0f,100,256,256,256), -1.5, 1.5, -4.0f, 5.0f);
weight = stb_clamp(weight,0,1);
for (o=0; o < 8; ++o) {
float scale = (float) (1 << o);
float ns = stb_perlin_noise3(x/scale, y/scale, o*2.0f, 256,256,256), heavier;
float sign = (ns < 0 ? -1.0f : 1.0f);
ns = (float) fabs(ns);
heavier = ns*ns*ns*ns*4;
ht += scale/2 * stb_lerp(weight, ns, heavier);
}
#else
if (x >= 10 && x <= 50 && y >= 30 && y <= 70) {
ht += x;
}
if (x >= 110 && x <= 150 && y >= 30 && y <= 70) {
ht += y;
}
#endif
return ht;
}
int main(int argc, char** argv)
{
enum IrradiantStatus
{
IRRADIANTSTATUS_BAD,
IRRADIANTSTATUS_OK = 2,
IRRADIANTSTATUS_GOOD
};
char const* name = "Irradiant";
printf("Hello, world from %s", name);
if (argc > 1)
printf(" and %s", argv[1]);
printf("!\n");
for (int i = 0; i < 3; ++i)
printf("static_increment: %d\n", static_increment());
if (argc > 3)
printf("Sum: %d\n", add(atoi(argv[2]), atoi(argv[3])));
float x = 3.14159, y = 13.37, z = 42.42;
printf("Perlin noise at (%f, %f, %f): %f\n", x, y, z, stb_perlin_noise3(x, y, z, 0, 0, 0));
printf("Irradiant status: %d\n", IRRADIANTSTATUS_GOOD);
return 0;
}
scalar Perlin(Vecf3 const& pos, Veci3 const& wrap)
{
return stb_perlin_noise3(pos.x(),pos.y(),pos.z(),wrap.x(),wrap.y(),wrap.z());
}
