sm64coopdx/src/pc/network/packets/packet_spawn_objects.c

#include <stdio.h>
#include "../network.h"
#include "object_fields.h"
#include "object_constants.h"
#include "src/game/object_helpers.h"
#include "behavior_data.h"
#include "behavior_table.h"
//#define DISABLE_MODULE_LOG 1
#include "pc/debuglog.h"

#define MAX_SPAWN_OBJECTS_PER_PACKET 8

#pragma pack(1)
struct SpawnObjectData {
    u8 parentId;
    u32 model;
    u16 behaviorId;
    s16 activeFlags;
    s32 rawData[80];
};

static u8 generate_parent_id(struct Object* objects[], u8 onIndex, bool sanitize) {
    struct Object* o = objects[onIndex];

    // special case if the parent is itself
    if (o->parentObj == o) { return (u8)-1; }

    if (onIndex == 0) {
        if (sanitize && o->parentObj->oSyncID == 0) {
            return (u8)-1;
        }
        assert(o->parentObj->oSyncID != 0);
        return (u8)o->parentObj->oSyncID;
    }

    for (u8 i = onIndex; i != (u8)-1; i--) {
        if (o->parentObj == objects[i]) { return i; }
    }

    assert(false);
}

void network_send_spawn_objects(struct Object* objects[], u32 models[], u8 objectCount) {
    network_send_spawn_objects_to(PACKET_DESTINATION_BROADCAST, objects, models, objectCount);
}

void network_send_spawn_objects_to(u8 sendToLocalIndex, struct Object* objects[], u32 models[], u8 objectCount) {
    assert(objectCount < MAX_SPAWN_OBJECTS_PER_PACKET);

    struct Packet p;
    packet_init(&p, PACKET_SPAWN_OBJECTS, true, true);
    packet_write(&p, &objectCount, sizeof(u8));

    for (u8 i = 0; i < objectCount; i++) {
        struct Object* o = objects[i];
        u32 model = models[i];
        u8 parentId = generate_parent_id(objects, i, true);
        u16 behaviorId = get_id_from_behavior(o->behavior);
        packet_write(&p, &parentId, sizeof(u8));
        packet_write(&p, &model, sizeof(u32));
        packet_write(&p, &behaviorId, sizeof(u16));
        packet_write(&p, &o->activeFlags, sizeof(s16));
        packet_write(&p, o->rawData.asU32, sizeof(s32) * 80);
        packet_write(&p, &o->header.gfx.scale[0], sizeof(f32));
        packet_write(&p, &o->header.gfx.scale[1], sizeof(f32));
        packet_write(&p, &o->header.gfx.scale[2], sizeof(f32));
    }

    if (sendToLocalIndex == PACKET_DESTINATION_BROADCAST) {
        network_send(&p);
    } else {
        network_send_to(sendToLocalIndex, &p);
    }
}

void network_receive_spawn_objects(struct Packet* p) {
    u8 objectCount = 0;

    packet_read(p, &objectCount, sizeof(u8));

    u8 reserveId = gNetworkLevelLoaded ? gNetworkPlayers[p->localIndex].globalIndex : 0;
    bool receivedReservedSyncObject = false;

    struct Object* spawned[MAX_SPAWN_OBJECTS_PER_PACKET] = { 0 };
    for (u8 i = 0; i < objectCount; i++) {
        struct SpawnObjectData data = { 0 };
        Vec3f scale = { 0 };
        packet_read(p, &data.parentId, sizeof(u8));
        packet_read(p, &data.model, sizeof(u32));
        packet_read(p, &data.behaviorId, sizeof(u16));
        packet_read(p, &data.activeFlags, sizeof(s16));
        packet_read(p, &data.rawData, sizeof(s32) * 80);
        packet_read(p, &scale[0], sizeof(f32));
        packet_read(p, &scale[1], sizeof(f32));
        packet_read(p, &scale[2], sizeof(f32));

        struct Object* parentObj = NULL;
        if (data.parentId == (u8)-1) {
            // this object is it's own parent, set it to a known object temporarily
            parentObj = gMarioStates[0].marioObj;
        } else {
            // this object has a known parent
            parentObj = (i == 0)
                      ? gSyncObjects[data.parentId].o
                      : spawned[data.parentId];
            if (parentObj == NULL) {
                // failed to find parent, make it it's own parent
                // may cause issues, but we want it to spawn!
                printf("ERROR: failed to find spawn object's parent (%d)!\n", data.parentId);
                parentObj = gMarioStates[0].marioObj;
                data.parentId = (u8)-1;
            }
        }

        if (parentObj == NULL) {
            printf("ERROR: failed to attach to mario!\n");
            return;
        }

        void* behavior = (void*)get_behavior_from_id(data.behaviorId);
        struct Object* o = spawn_object(parentObj, data.model, behavior);
        o->createdThroughNetwork = true;
        memcpy(o->rawData.asU32, data.rawData, sizeof(u32) * 80);

        o->header.gfx.scale[0] = scale[0];
        o->header.gfx.scale[1] = scale[1];
        o->header.gfx.scale[2] = scale[2];

        // correct the temporary parent with the object itself
        if (data.parentId == (u8)-1) { o->parentObj = o; }

        if (o->oSyncID != 0) {
            // check if they've allocated one of their reserved sync objects
            receivedReservedSyncObject = (o->oSyncID != 0 && gSyncObjects[o->oSyncID].reserved == reserveId);
            if (receivedReservedSyncObject || gNetworkLevelSyncing) {
                gSyncObjects[o->oSyncID].o = o;
                gSyncObjects[o->oSyncID].reserved = 0;
            }
        }

        spawned[i] = o;
    }

    // update their block of reserved ids
    if (gNetworkType == NT_SERVER && receivedReservedSyncObject) {
        network_send_reservation(p->localIndex);
    }
}