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multi-threaded chunk loading

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onezplpl 2024-07-13 17:02:49 -04:00
parent 186ea5f204
commit 7b9de49502
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4 changed files with 73 additions and 58 deletions
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14
const.h
View file

@ -4,21 +4,19 @@
typedef struct Vertex {
vec3 pos;
} Vertex;
} Vertex;
typedef struct VertexI {
int pos[3];
} VertexI;
} VertexI;
typedef struct Vertex2 {
vec2 pos;
} Vertex2;
#define CHUNK_LENGTH 16
#define CHUNK_RADIUS_H 4//8
#define CHUNK_RADIUS_V 4 //4
#define CHUNK_LENGTH 8
#define CHUNK_RADIUS_H 16 // 8
#define CHUNK_RADIUS_V 8 // 4
#define TEXT_GAP_H 1 / 3.0
#define TEXT_GAP_V 1 / 1.0
@ -28,7 +26,7 @@ typedef struct Vertex2 {
#define CHUNK_ALL CHUNK_DIAMETER_H *CHUNK_DIAMETER_H *CHUNK_DIAMETER_V
#define BLOCK_ALL CHUNK_LENGTH *CHUNK_LENGTH *CHUNK_LENGTH
#define CBLOCK_ALL BLOCK_ALL *CHUNK_ALL
#define CBUF_ALL 25
#define CBUF_ALL 10
#define CTRI_ALL CBLOCK_ALL * 18 * sizeof(Vertex)

65
cubes.c
View file

@ -12,15 +12,15 @@ struct args {
};
void gen_face(Vertex *cube, int i, int x, int y, int z, int x2, int y2, int z2,
int j, int is_text, Chunk dat) {
int j, int is_text, Chunk dat, int ci) {
VertexI a = {{x, y, z}};
Vertex a2 = {{x, y, z}};
if (is_text) {
a.pos[i]--;
int exists = 0;
exists = (cube_exists(x, y, z, dat) !=
cube_exists(a.pos[0], a.pos[1], a.pos[2], dat));
exists = (cube_exists(x, y, z, dat, ci) !=
cube_exists(a.pos[0], a.pos[1], a.pos[2], dat, ci));
a2.pos[0] = exists ? TEXT_GAP_H * i : -1.0;
a2.pos[1] = exists ? TEXT_GAP_V * i : -1.0;
@ -55,17 +55,21 @@ void *gen_chunk(void *args) {
struct args args2 = ((struct args *)args)[0];
int i = args2.i;
int a = args2.a % CHUNK_DIAMETER_H;
int a2 = args2.a;
int x2 = args2.pos.pos[0];
int y2 = args2.pos.pos[1];
int z2 = args2.pos.pos[2];
Vertex *cube = args2.cube;
int is_text = args2.is_text;
Chunk chunk =
fetch_chunk(x2 / CHUNK_LENGTH, y2 / CHUNK_LENGTH, z2 / CHUNK_LENGTH);
printf("progress on this thread (%i / %i)\n", args2.a, CHUNK_ALL);
purge_chunks(a % CHUNK_DIAMETER_H);
Chunk chunk = fetch_chunk(x2 / CHUNK_LENGTH, y2 / CHUNK_LENGTH,
z2 / CHUNK_LENGTH, a);
printf("progress on this thread (%i / %i)\n", a2, CHUNK_ALL);
purge_chunks();
for (int y4 = 0; y4 < CHUNK_LENGTH; y4++) {
for (int x4 = 0; x4 < CHUNK_LENGTH; x4++) {
@ -75,9 +79,9 @@ void *gen_chunk(void *args) {
int x3 = x2 + x4;
int z3 = z2 + z4;
gen_face(cube, 0, x3, y3, z3, x4, y4, z4, i, is_text, chunk);
gen_face(cube, 1, x3, y3, z3, x4, y4, z4, i + 6, is_text, chunk);
gen_face(cube, 2, x3, y3, z3, x4, y4, z4, i + 12, is_text, chunk);
gen_face(cube, 0, x3, y3, z3, x4, y4, z4, i, is_text, chunk, a );
gen_face(cube, 1, x3, y3, z3, x4, y4, z4, i + 6, is_text, chunk, a );
gen_face(cube, 2, x3, y3, z3, x4, y4, z4, i + 12, is_text, chunk, a);
i += 18;
}
}
@ -92,38 +96,39 @@ void gen_cubes(Vertex *cube, int x, int y, int z, int is_text) {
y *= CHUNK_LENGTH;
z *= CHUNK_LENGTH;
pthread_t thread_id[24];
for (int y2 = y - CHUNK_RADIUS_H * CHUNK_LENGTH;
y2 <= y + CHUNK_RADIUS_H * CHUNK_LENGTH; y2 += CHUNK_LENGTH) {
struct args args[CHUNK_DIAMETER_H];
pthread_t thread_id[CHUNK_DIAMETER_H];
for (int y2 = y - CHUNK_RADIUS_V * CHUNK_LENGTH;
y2 <= y + CHUNK_RADIUS_V * CHUNK_LENGTH; y2 += CHUNK_LENGTH) {
for (int x2 = x - CHUNK_RADIUS_H * CHUNK_LENGTH;
x2 <= x + CHUNK_RADIUS_H * CHUNK_LENGTH; x2 += CHUNK_LENGTH) {
for (int z2 = z - CHUNK_RADIUS_V * CHUNK_LENGTH;
z2 <= z + CHUNK_RADIUS_V * CHUNK_LENGTH; z2 += CHUNK_LENGTH) {
for (int z2 = z - CHUNK_RADIUS_H * CHUNK_LENGTH;
z2 <= z + CHUNK_RADIUS_H * CHUNK_LENGTH; z2 += CHUNK_LENGTH) {
VertexI pos = {{x2, y2, z2}};
struct args args = {cube, pos, is_text, a, i};
int a2 = a % CHUNK_DIAMETER_H;
args[a2].cube = cube;
args[a2].pos = pos;
args[a2].is_text = is_text;
args[a2].a = a;
args[a2].i = i;
gen_chunk((void *)&args);
/*gen_chunk((void *)&args); */
pthread_create(&(thread_id[a2]), NULL, gen_chunk,
(void *)&(args[a2]));
i += CHUNK_LENGTH * CHUNK_LENGTH * CHUNK_LENGTH * 18;
/* buggy
pthread_create(&(thread_id[i]), NULL, gen_chunk, (void *)&args);
if (i == 23) {
for (int k = 0; k < 24; k++) {
pthread_join((thread_id[k]), NULL);
}
i = 0;
} else {
i++;
}
*/
a++;
}
for (int k = 0; k < CHUNK_DIAMETER_H; k++) {
pthread_join((thread_id[k]), NULL);
}
}
}
}

46
gen.c
View file

@ -5,6 +5,7 @@
Chunk *chunks = NULL;
int lastI = 0;
int seed = 69420;
double interpolate(double a0, double a1, double w) {
return (a1 - a0) * (3.0 - w * 2.0) * w * w + a0;
@ -13,10 +14,8 @@ double interpolate(double a0, double a1, double w) {
int hash_combine(int a, int b) { return b + 0x9e3779b9 + (a << 6) + (a >> 2); }
Vertex2 perlin_grad(int x, int y) {
srand(x);
int x_hash = rand();
srand(y);
int y_hash = rand();
int x_hash = hash_combine(x, seed);
int y_hash = hash_combine(seed, y);
double random = hash_combine(x_hash, y_hash) * (M_PI / ~(~0u >> 1));
Vertex2 out = {cos(random), sin(random)};
@ -58,16 +57,19 @@ double perlin_calc(double x, double y, double s) {
return value;
}
Chunk fetch_chunk(int x, int y, int z) {
Chunk fetch_chunk(int x, int y, int z, int ci) {
if (chunks == NULL) {
chunks = calloc(CBUF_ALL, sizeof(Chunk));
chunks = calloc(CBUF_ALL * CHUNK_DIAMETER_H, sizeof(Chunk));
}
Chunk *chunks2 = &chunks[CBUF_ALL * ci];
Chunk chunk;
int i, j;
for (j = 0; j < CBUF_ALL; j++) {
i = (j + lastI) % CBUF_ALL;
chunk = chunks[i];
chunk = chunks2[i];
if (chunk.x == x && chunk.y == y && chunk.z == z && chunk.exists) {
// lastI = i;
return chunk;
@ -76,7 +78,7 @@ Chunk fetch_chunk(int x, int y, int z) {
for (j = CBUF_ALL - 1; j >= 0; j--) {
i = j;
chunk = chunks[i];
chunk = chunks2[i];
if (!chunk.exists)
break;
}
@ -97,8 +99,10 @@ Chunk fetch_chunk(int x, int y, int z) {
int x3 = x2 + x * CHUNK_LENGTH;
for (int z2 = 0; z2 < CHUNK_LENGTH; z2++) {
int z3 = z2 + z * CHUNK_LENGTH;
double hp = (perlin_calc(x3, z3, 256.0) * 128.0);
int h = hp + 64;
double hp = perlin_calc(x3, z3, 128.0);
hp = ((hp > 0.0) ? -1.0 : 1.0) * (pow(fabs(hp),0.7));
hp *= 32.0;
int h = hp + 32;
for (int y2 = 0; y2 < CHUNK_LENGTH; y2++) {
int y3 = y2 + y * CHUNK_LENGTH;
@ -108,22 +112,30 @@ Chunk fetch_chunk(int x, int y, int z) {
}
}
chunks[i] = chunk;
chunks2[i] = chunk;
return chunk;
}
void purge_chunks() {
void purge_chunks(int ci) {
/*
free(chunks);
chunks = calloc(CBUF_ALL, sizeof(Chunk));
*/
if (chunks == NULL) {
chunks = calloc(CBUF_ALL * CHUNK_DIAMETER_H, sizeof(Chunk));
}
memset(&chunks[CBUF_ALL * ci], 0, sizeof(Chunk) * CBUF_ALL);
}
int cube_exists(int x, int y, int z, Chunk dat) {
if (x < 0 || y < 0 || z < 0) return 0;
int cube_exists(int x, int y, int z, Chunk dat, int ci) {
if (x < 0 || y < 0 || z < 0)
return 0;
if (dat.exists == 0 || dat.x != (x / CHUNK_LENGTH) || dat.y != (y / CHUNK_LENGTH) || dat.z != (z / CHUNK_LENGTH) )
dat =
fetch_chunk((x / CHUNK_LENGTH), (y / CHUNK_LENGTH), (z / CHUNK_LENGTH));
if (dat.exists == 0 || dat.x != (x / CHUNK_LENGTH) ||
dat.y != (y / CHUNK_LENGTH) || dat.z != (z / CHUNK_LENGTH))
dat = fetch_chunk((x / CHUNK_LENGTH), (y / CHUNK_LENGTH),
(z / CHUNK_LENGTH), ci);
int h = dat.blocks[(y % CHUNK_LENGTH) + (z % CHUNK_LENGTH) * CHUNK_LENGTH +
(x % CHUNK_LENGTH) * CHUNK_LENGTH * CHUNK_LENGTH];

6
gen.h
View file

@ -1,5 +1,5 @@
#include "const.h"
int cube_exists(int x, int y, int z, Chunk dat);
Chunk fetch_chunk(int x, int y, int z);
void purge_chunks();
int cube_exists(int x, int y, int z, Chunk dat, int ci);
Chunk fetch_chunk(int x, int y, int z, int ci);
void purge_chunks(int ci);