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LEFTONE/core/loworld/generator.c

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#include "./generator.h"
#include <stdbool.h>
#include <stdint.h>
#include <msgpack.h>
#include "util/chaos/xorshift.h"
#include "util/math/algorithm.h"
#include "util/memory/memory.h"
#include "util/mpkutil/get.h"
#include "./chunk.h"
#include "./poolset.h"
#include "./template.h"
struct loworld_generator_t {
/* injected deps */
const loworld_poolset_t* pools;
/* parameters */
uint64_t seed;
};
#define LOWORLD_GENERATOR_BLOCK_SIZE 8
static uint64_t loworld_generator_rand_(
const loworld_generator_t* gen, int32_t x, int32_t y) {
assert(gen != NULL);
const uint64_t ux = (uint64_t) x - INT32_MIN;
const uint64_t uy = (uint64_t) y - INT32_MIN;
/* multiply prime numbers */
return ux*400206850629133 + uy*890206850629189 + gen->seed;
}
static loworld_chunk_biome_t loworld_generator_decide_chunk_biome_(
const loworld_generator_t* gen, int32_t x, int32_t y) {
assert(gen != NULL);
static const loworld_chunk_biome_t base_biomes[] = {
LOWORLD_CHUNK_BIOME_CAVIAS_CAMP,
LOWORLD_CHUNK_BIOME_LABORATORY,
};
static const size_t base_biomes_length =
sizeof(base_biomes)/sizeof(base_biomes[0]);
/* random seed which depends the block */
uint64_t bs = loworld_generator_rand_(gen, x/LOWORLD_GENERATOR_BLOCK_SIZE, y);
const loworld_chunk_biome_t base =
base_biomes[(bs = chaos_xorshift(bs))%base_biomes_length];
uint64_t fx = x + (y == 0? 0: loworld_generator_rand_(gen, 0, y));
fx = MATH_ABS(fx)%LOWORLD_GENERATOR_BLOCK_SIZE;
if (fx == 0) return LOWORLD_CHUNK_BIOME_METAPHYSICAL_GATE;
if (fx == LOWORLD_GENERATOR_BLOCK_SIZE/2) {
switch (base) {
case LOWORLD_CHUNK_BIOME_CAVIAS_CAMP:
return LOWORLD_CHUNK_BIOME_BOSS_THEISTS_CHILD;
case LOWORLD_CHUNK_BIOME_LABORATORY:
return x%2?
LOWORLD_CHUNK_BIOME_BOSS_BIG_WARDER:
LOWORLD_CHUNK_BIOME_BOSS_GREEDY_SCIENTIST;
default: ;
}
}
return base;
}
static void loworld_generator_generate_for_metaphysical_gate_(
const loworld_generator_t* gen, loworld_chunk_t* chunk) {
assert(gen != NULL);
assert(chunk != NULL);
const loworld_template_building_param_t param = {
.target = chunk,
.pools = gen->pools,
.seed = loworld_generator_rand_(gen, chunk->pos.x, chunk->pos.y),
};
loworld_template_metaphysical_gate_build_chunk(&param);
}
static void loworld_generator_generate_for_cavias_camp_(
const loworld_generator_t* gen, loworld_chunk_t* chunk) {
assert(gen != NULL);
assert(chunk != NULL);
static void (*funcs[])(const loworld_template_building_param_t* p) = {
loworld_template_open_space_build_chunk,
loworld_template_broken_open_space_build_chunk,
loworld_template_passage_build_chunk,
loworld_template_broken_passage_build_chunk,
};
static const size_t funcs_len = sizeof(funcs)/sizeof(funcs[0]);
uint64_t s = loworld_generator_rand_(gen, chunk->pos.x, chunk->pos.y);
const uint64_t r = (s = chaos_xorshift(s))%funcs_len;
const loworld_template_building_param_t param = {
.target = chunk,
.pools = gen->pools,
.seed = chaos_xorshift(s),
};
return funcs[r](&param);
}
static void loworld_generator_generate_for_laboratory_(
const loworld_generator_t* gen, loworld_chunk_t* chunk) {
assert(gen != NULL);
assert(chunk != NULL);
static void (*funcs[])(const loworld_template_building_param_t* p) = {
loworld_template_passage_build_chunk,
loworld_template_broken_passage_build_chunk,
loworld_template_stairs_build_chunk,
};
static const size_t funcs_len = sizeof(funcs)/sizeof(funcs[0]);
uint64_t s = loworld_generator_rand_(gen, chunk->pos.x, chunk->pos.y);
const uint64_t r = (s = chaos_xorshift(s))%funcs_len;
const loworld_template_building_param_t param = {
.target = chunk,
.pools = gen->pools,
.seed = chaos_xorshift(s),
};
return funcs[r](&param);
}
static void loworld_generator_generate_for_boss_theists_child_(
const loworld_generator_t* gen, loworld_chunk_t* chunk) {
assert(gen != NULL);
assert(chunk != NULL);
const loworld_template_building_param_t param = {
.target = chunk,
.pools = gen->pools,
.seed = loworld_generator_rand_(gen, chunk->pos.x, chunk->pos.y),
};
loworld_template_boss_theists_child_build_chunk(&param);
}
static void loworld_generator_generate_for_boss_big_warder_(
const loworld_generator_t* gen, loworld_chunk_t* chunk) {
assert(gen != NULL);
assert(chunk != NULL);
const loworld_template_building_param_t param = {
.target = chunk,
.pools = gen->pools,
.seed = loworld_generator_rand_(gen, chunk->pos.x, chunk->pos.y),
};
loworld_template_boss_big_warder_build_chunk(&param);
}
static void loworld_generator_generate_for_boss_greedy_scientist_(
const loworld_generator_t* gen, loworld_chunk_t* chunk) {
assert(gen != NULL);
assert(chunk != NULL);
const loworld_template_building_param_t param = {
.target = chunk,
.pools = gen->pools,
.seed = loworld_generator_rand_(gen, chunk->pos.x, chunk->pos.y),
};
loworld_template_boss_greedy_scientist_build_chunk(&param);
}
loworld_generator_t* loworld_generator_new(
const loworld_poolset_t* pools, uint64_t seed) {
assert(pools != NULL);
loworld_generator_t* gen = memory_new(sizeof(*gen));
*gen = (typeof(*gen)) {
.pools = pools,
};
loworld_generator_randomize(gen, seed);
return gen;
}
void loworld_generator_delete(loworld_generator_t* gen) {
assert(gen != NULL);
memory_delete(gen);
}
void loworld_generator_randomize(loworld_generator_t* gen, uint64_t seed) {
assert(gen != NULL);
gen->seed = seed;
}
void loworld_generator_generate(
const loworld_generator_t* gen, loworld_chunk_t* chunk) {
assert(gen != NULL);
assert(chunk != NULL);
chunk->biome =
loworld_generator_decide_chunk_biome_(gen, chunk->pos.x, chunk->pos.y);
switch (chunk->biome) {
case LOWORLD_CHUNK_BIOME_METAPHYSICAL_GATE:
loworld_generator_generate_for_metaphysical_gate_(gen, chunk);
break;
case LOWORLD_CHUNK_BIOME_CAVIAS_CAMP:
loworld_generator_generate_for_cavias_camp_(gen, chunk);
break;
case LOWORLD_CHUNK_BIOME_LABORATORY:
loworld_generator_generate_for_laboratory_(gen, chunk);
break;
case LOWORLD_CHUNK_BIOME_BOSS_THEISTS_CHILD:
loworld_generator_generate_for_boss_theists_child_(gen, chunk);
break;
case LOWORLD_CHUNK_BIOME_BOSS_BIG_WARDER:
loworld_generator_generate_for_boss_big_warder_(gen, chunk);
break;
case LOWORLD_CHUNK_BIOME_BOSS_GREEDY_SCIENTIST:
loworld_generator_generate_for_boss_greedy_scientist_(gen, chunk);
break;
}
}
void loworld_generator_pack(
const loworld_generator_t* gen, msgpack_packer* packer) {
assert(gen != NULL);
assert(packer != NULL);
msgpack_pack_uint64(packer, gen->seed);
}
bool loworld_generator_unpack(
loworld_generator_t* gen, const msgpack_object* obj) {
assert(gen != NULL);
assert(obj != NULL);
uint64_t seed;
if (!mpkutil_get_uint64(obj, &seed)) return false;
loworld_generator_randomize(gen, seed);
return true;
}