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add more mob types

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This commit is contained in:
p2r3
2025-08-22 15:33:42 +03:00
parent 1c4e433a32
commit f366e7fdc6
5 changed files with 80 additions and 23 deletions
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73
src/procedures.c
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@@ -504,7 +504,7 @@ void spawnMob (uint8_t type, short x, uint8_t y, short z) {
player_data[j].client_fd,
65536 + i, // Try to avoid conflict with client file descriptors
recv_buffer, // The UUID doesn't matter, feed it garbage
type, x, y, z,
type, (double)x + 0.5f, y, (double)z + 0.5f,
// Face opposite of the player, as if looking at them when spawning
(player_data[j].yaw + 127) & 255, 0
);
@@ -520,7 +520,7 @@ void spawnMob (uint8_t type, short x, uint8_t y, short z) {
void handleServerTick (int64_t time_since_last_tick) {
// Send Keep Alive and Update Time packets to all in-game clients
world_time += 20 * time_since_last_tick / 1000000;
world_time = (world_time + 20 * time_since_last_tick / 1000000) % 24000;
for (int i = 0; i < MAX_PLAYERS; i ++) {
if (player_data[i].client_fd == -1) continue;
sc_keepAlive(player_data[i].client_fd);
@@ -540,33 +540,46 @@ void handleServerTick (int64_t time_since_last_tick) {
for (int i = 0; i < MAX_MOBS; i ++) {
if (mob_data[i].type == 0) continue;
uint8_t passive = (
mob_data[i].type == 25 || // Chicken
mob_data[i].type == 28 || // Cow
mob_data[i].type == 95 || // Pig
mob_data[i].type == 106 // Sheep
);
uint32_t r = fast_rand();
// Skip 50% of ticks randomly
if (r & 1) continue;
// Skip 25% of passive mob ticks randomly
if (passive && (r & 3)) continue;
// Find the player closest to this mob
uint16_t closest_x = 65535, closest_z = 65535;
PlayerData* closest_player;
uint32_t closest_dist = 65535;
for (int j = 0; j < MAX_PLAYERS; j ++) {
if (player_data[j].client_fd == -1) continue;
uint16_t dist_x = abs(mob_data[i].x - player_data[j].x);
uint16_t dist_z = abs(mob_data[i].z - player_data[j].z);
if (dist_x + dist_z < closest_x + closest_z) {
closest_x = dist_x;
closest_z = dist_z;
uint16_t curr_dist = (
abs(mob_data[i].x - player_data[j].x) +
abs(mob_data[i].z - player_data[j].z)
);
if (curr_dist < closest_dist) {
closest_dist = curr_dist;
closest_player = &player_data[j];
}
}
// Despawn mobs past a certain distance from nearest player
if (closest_x + closest_z > MOB_DESPAWN_DISTANCE) {
if (closest_dist > MOB_DESPAWN_DISTANCE) {
mob_data[i].type = 0;
continue;
}
// Move by one block on the X or Z axis
// Yaw is set to face in the direction of motion
short new_x = mob_data[i].x, new_z = mob_data[i].z;
uint8_t yaw;
uint8_t new_y = mob_data[i].y, yaw = 0;
if (passive) { // Passive mob movement handling
// Move by one block on the X or Z axis
// Yaw is set to face in the direction of motion
if ((r >> 2) & 1) {
if ((r >> 1) & 1) { new_x += 1; yaw = 192; }
else { new_x -= 1; yaw = 64; }
@@ -575,14 +588,42 @@ void handleServerTick (int64_t time_since_last_tick) {
else { new_z -= 1; yaw = 128; }
}
// Vary the yaw angle to look just a little less robotic
yaw += ((r >> 6) & 15) - 8;
yaw += ((r >> 7) & 31) - 16;
} else { // Hostile mob movement handling
// If we're already next to the player, hurt them and skip movement
if (closest_dist < 3) {
if (closest_player->health < 6) closest_player->health = 0;
else closest_player->health -= 6;
sc_damageEvent(closest_player->client_fd, closest_player->client_fd, D_generic);
sc_setHealth(closest_player->client_fd, closest_player->health, closest_player->hunger);
continue;
}
// Move towards the closest player on 8 axis
// The condition nesting ensures a correct yaw at 45 degree turns
if (closest_player->x < mob_data[i].x) {
new_x -= 1; yaw = 64;
if (closest_player->z < mob_data[i].z) { new_z -= 1; yaw += 32; }
else if (closest_player->z > mob_data[i].z) { new_z += 1; yaw -= 32; }
}
else if (closest_player->x > mob_data[i].x) {
new_x += 1; yaw = 192;
if (closest_player->z < mob_data[i].z) { new_z -= 1; yaw -= 32; }
else if (closest_player->z > mob_data[i].z) { new_z += 1; yaw += 32; }
} else {
if (closest_player->z < mob_data[i].z) { new_z -= 1; yaw = 128; }
else if (closest_player->z > mob_data[i].z) { new_z += 1; yaw = 0; }
}
}
// Check if the block we're moving into is passable:
// if yes, and the block below is solid, keep the same Y level;
// if yes, but the block below isn't solid, drop down one block;
// if not, go up by up to one block;
// if going up isn't possible, skip this iteration.
uint8_t new_y = mob_data[i].y;
uint8_t block = getBlockAt(new_x, new_y, new_z);
if (block != B_air) {
if (getBlockAt(new_x, new_y + 1, new_z) == B_air) new_y += 1;