void make_world(Map *map, int p, int q) {
int pad = 1;
for (int dx = -pad; dx < CHUNK_SIZE + pad; dx++) {
for (int dz = -pad; dz < CHUNK_SIZE + pad; dz++) {
int x = p * CHUNK_SIZE + dx;
int z = q * CHUNK_SIZE + dz;
float f = simplex2(x * 0.01, z * 0.01, 4, 0.5, 2);
float g = simplex2(-x * 0.01, -z * 0.01, 2, 0.9, 2);
int mh = g * 32 + 16;
int h = f * mh;
int w = 1;
int t = 12;
if (h <= t) {
h = t;
w = 2;
}
if (dx < 0 || dz < 0 || dx >= CHUNK_SIZE || dz >= CHUNK_SIZE) {
w = -1;
}
for (int y = 0; y < h; y++) {
map_set(map, x, y, z, w);
}
}
}
db_update_chunk(map, p, q);
}
/*
* maximize c^T x subject to Ax <= b and x >= 0
*/
void (simplex)(unsigned int D, unsigned int N, float x[N], const float c[N], const float b[D], const float A[D][N])
{
// 1. Step: slack variables
// max c^T x Ax + z = b x,z >= 0
float A2[D + 1][N + D + 1];
for (unsigned int i = 0; i < N + D + 1; i++) {
A2[0][i] = (i < N) ? -c[i] : 0.;
for (unsigned int j = 0; j < D; j++) {
if (i < N)
A2[1 + j][i] = A[j][i];
else if (i == N + D)
A2[1 + j][i] = b[j];
else
A2[1 + j][i] = (i - N == j) ? 1. : 0.;
}
}
simplex2(D, N + D, A2);
// extract results:
float x2[D + N];
solution(D, D + N, x2, A2);
for (unsigned int i = 0; i < N; i++)
x[i] = x2[i];
}
void make_world(Map *map, int p, int q) {
int pad = 1;
for (int dx = -pad; dx < CHUNK_SIZE + pad; dx++) {
for (int dz = -pad; dz < CHUNK_SIZE + pad; dz++) {
int x = p * CHUNK_SIZE + dx;
int z = q * CHUNK_SIZE + dz;
float f = simplex2(x * 0.01, z * 0.01, 4, 0.5, 2);
float g = simplex2(-x * 0.01, -z * 0.01, 2, 0.9, 2);
int mh = g * 32 + 16;
int h = f * mh;
int w = 1;
int t = 12;
if (h <= t) {
h = t;
w = 2;
}
if (dx < 0 || dz < 0 || dx >= CHUNK_SIZE || dz >= CHUNK_SIZE) {
w = -1;
}
for (int y = 0; y < h; y++) {
map_set(map, x, y, z, w);
}
if (w == 1) {
if (simplex2(-x * 0.1, z * 0.1, 4, 0.8, 2) > 0.6) {
map_set(map, x, h, z, 17);
}
if (simplex2(x * 0.05, -z * 0.05, 4, 0.8, 2) > 0.7) {
int w = 18 + simplex2(x * 0.1, z * 0.1, 4, 0.8, 2) * 7;
map_set(map, x, h, z, w);
}
}
for (int y = 64; y < 72; y++) {
if (simplex3(x * 0.01, y * 0.1, z * 0.01, 8, 0.5, 2) > 0.75) {
map_set(map, x, y, z, 16);
}
}
}
}
}
void create_world1(int p, int q, world_func func, void *arg) {
for (int dx = -CHUNK_PAD; dx < CHUNK_SIZE + CHUNK_PAD; dx++) {
for (int dz = -CHUNK_PAD; dz < CHUNK_SIZE + CHUNK_PAD; dz++) {
int flag = 1;
if (dx < 0 || dz < 0 || dx >= CHUNK_SIZE || dz >= CHUNK_SIZE) {
flag = -1;
}
int x = p * CHUNK_SIZE + dx;
int z = q * CHUNK_SIZE + dz;
float f = simplex2(x * 0.01, z * 0.01, 4, 0.5, 2);
float g = simplex2(-x * 0.01, -z * 0.01, 2, 0.9, 2);
int mh = g * 32 + 16;
int h = f * mh;
unsigned int material = M_GRASS;
int t = 12;
if (h <= t) {
h = t;
material = M_SAND;
}
int w = (W){.shape=flag*S_CUBE, .material=material, .color=0}.value;
// sand and grass terrain
for (int y = 0; y < h; y++) {
func(x, y, z, w, arg);
}
if (material == M_GRASS) {
if (SHOW_PLANTS) {
// grass
if (simplex2(-x * 0.1, z * 0.1, 4, 0.8, 2) > 0.6) {
func(x, h, z, (W){.shape=flag*S_PLANT,
.material=M_PLANT_GRASS, .color=0, .action=0}.value,
arg);
}
// flowers
if (simplex2(x * 0.05, -z * 0.05, 4, 0.8, 2) > 0.7) {
func(x, h, z, (W){.shape=flag*S_PLANT,
.material=(M_RED_FLOWER
+ M_FLOWER_COUNT * simplex2(x * 0.1, z * 0.1, 4, 0.8, 2)),
.color=0, .action=0}.value, arg);
}
void biome1(int x, int z, int flag, world_func func, void *arg) {
int lo = simplex2(x * 0.01, z * 0.01, 4, 0.5, 2) * 8 + 8;
int hi = simplex2(-x * 0.01, -z * 0.01, 4, 0.5, 2) * 32 + 32;
int lookup[] = {3, 6, 11, 12, 13};
for (int y = 0; y < lo; y++) {
func(x, y, z, 6 * flag, arg);
}
for (int y = lo; y < hi; y++) {
int i = simplex3(-x * 0.01, -y * 0.01, -z * 0.01, 4, 0.5, 2) * 10;
int w = lookup[i % 5];
if (simplex3(x * 0.01, y * 0.01, z * 0.01, 4, 0.5, 2) > 0.5) {
func(x, y, z, w * flag, arg);
}
}
if (SHOW_CLOUDS) {
for (int y = 64; y < 72; y++) {
if (simplex3(
x * 0.01, y * 0.1, z * 0.01, 8, 0.5, 2) > 0.75)
{
func(x, y, z, 16 * flag, arg);
}
}
}
}
void create_world2(int p, int q, world_func func, void *arg) {
int pad = 1;
for (int dx = -pad; dx < CHUNK_SIZE + pad; dx++) {
for (int dz = -pad; dz < CHUNK_SIZE + pad; dz++) {
int flag = 1;
if (dx < 0 || dz < 0 || dx >= CHUNK_SIZE || dz >= CHUNK_SIZE) {
flag = -1;
}
int x = p * CHUNK_SIZE + dx;
int z = q * CHUNK_SIZE + dz;
int i = simplex2(-x * 0.001, -z * 0.001, 8, 0.5, 2) * 2;
if (i == 0) biome0(x, z, flag, func, arg);
else biome1(x, z, flag, func, arg);
}
}
}
void make_world(Map *map, int p, int q) {
int pad = 1;
for (int dx = -pad; dx < CHUNK_SIZE + pad; dx++) {
for (int dz = -pad; dz < CHUNK_SIZE + pad; dz++) {
int x = p * CHUNK_SIZE + dx;
int z = q * CHUNK_SIZE + dz;
float f = simplex2(x * 0.01, z * 0.01, 4, 0.5, 2);
float g = simplex2(-x * 0.01, -z * 0.01, 2, 0.9, 2);
int mh = g * 32 + 16;
int h = f * mh;
int w = 1;
int t = 12;
if (h <= t) {
h = t;
w = 2;
}
if (dx < 0 || dz < 0 || dx >= CHUNK_SIZE || dz >= CHUNK_SIZE) {
w = -1;
}
// sand and grass terrain
for (int y = 0; y < h; y++) {
map_set(map, x, y, z, w);
}
// TODO: w = -1 if outside of chunk
if (w == 1) {
// grass
if (simplex2(-x * 0.1, z * 0.1, 4, 0.8, 2) > 0.6) {
map_set(map, x, h, z, 17);
}
// flowers
if (simplex2(x * 0.05, -z * 0.05, 4, 0.8, 2) > 0.7) {
int w = 18 + simplex2(x * 0.1, z * 0.1, 4, 0.8, 2) * 7;
map_set(map, x, h, z, w);
}
// trees
int ok = 1;
if (dx - 4 < 0 || dz - 4 < 0 ||
dx + 4 >= CHUNK_SIZE || dz + 4 >= CHUNK_SIZE)
{
ok = 0;
}
if (ok && simplex2(x, z, 6, 0.5, 2) > 0.84) {
for (int y = h + 3; y < h + 8; y++) {
for (int ox = -3; ox <= 3; ox++) {
for (int oz = -3; oz <= 3; oz++) {
int d = (ox * ox) + (oz * oz) +
(y - (h + 4)) * (y - (h + 4));
if (d < 11) {
map_set(map, x + ox, y, z + oz, 15);
}
}
}
}
for (int y = h; y < h + 7; y++) {
map_set(map, x, y, z, 5);
}
}
}
// clouds
for (int y = 64; y < 72; y++) {
if (simplex3(x * 0.01, y * 0.1, z * 0.01, 8, 0.5, 2) > 0.75) {
map_set(map, x, y, z, 16);
}
}
}
}
}
void biome0(int x, int z, int flag, world_func func, void *arg) {
float f = simplex2(x * 0.01, z * 0.01, 4, 0.5, 2);
float g = simplex2(-x * 0.01, -z * 0.01, 2, 0.9, 2);
int mh = g * 32 + 16;
int h = f * mh;
int w = 1;
int t = 12;
if (h <= t) {
h = t;
w = 2;
}
// sand and grass terrain
for (int y = 0; y < h; y++) {
func(x, y, z, w * flag, arg);
}
if (w == 1) {
if (SHOW_PLANTS) {
// grass
if (simplex2(-x * 0.1, z * 0.1, 4, 0.8, 2) > 0.6) {
func(x, h, z, 17 * flag, arg);
}
// flowers
if (simplex2(x * 0.05, -z * 0.05, 4, 0.8, 2) > 0.7) {
int w = 18 + simplex2(x * 0.1, z * 0.1, 4, 0.8, 2) * 7;
func(x, h, z, w * flag, arg);
}
}
// trees
int ok = 0;//SHOW_TREES;
// if (dx - 4 < 0 || dz - 4 < 0 ||
// dx + 4 >= CHUNK_SIZE || dz + 4 >= CHUNK_SIZE)
// {
// ok = 0;
// }
if (ok && simplex2(x, z, 6, 0.5, 2) > 0.84) {
for (int y = h + 3; y < h + 8; y++) {
for (int ox = -3; ox <= 3; ox++) {
for (int oz = -3; oz <= 3; oz++) {
int d = (ox * ox) + (oz * oz) +
(y - (h + 4)) * (y - (h + 4));
if (d < 11) {
func(x + ox, y, z + oz, 15, arg);
}
}
}
}
for (int y = h; y < h + 7; y++) {
func(x, y, z, 5, arg);
}
}
}
// clouds
if (SHOW_CLOUDS) {
for (int y = 64; y < 72; y++) {
if (simplex3(
x * 0.01, y * 0.1, z * 0.01, 8, 0.5, 2) > 0.75)
{
func(x, y, z, 16 * flag, arg);
}
}
}
}