ld58/code/game/impl/npc.c

#include "game/npc.h"
#include "game/world.h"
#include "core/types.h"

#include <stdio.h>

void updateNPC(F32 delta, NPC *npc, World *world) {
  switch (npc->mode) {
    case NPC_ACTION_WAITING:
      npc->waitTime+=delta;
      if(npc->waitTime > npc->maxWaitTime) {
        npc->mode = NPC_ACTION_WALKING;
        U32 next = npc->targetNavNode == 100 ? 20 : 100;
        npc->targetNavNode = next; // TODO RANDOM
        printf("Starting to nav path\n");
        npc->path = Nav_Path(world->navMesh, npc->currentNavNode, npc->targetNavNode);
        printf("done\n");
        npc->walkTimer = 0;
        printf("%.*s started walking to %d\n", Sv(npc->name), npc->targetNavNode);
      }
    break;
    case NPC_ACTION_WALKING:
      npc->walkTimer+=delta;
      if(npc->walkTimer >= NPC_SPEED){
        npc->walkTimer = 0;
        if(npc->path.nodeCount == npc->pathIndex+1){
          printf("Finished! so I'm waiting\n");
          npc->mode = NPC_ACTION_WAITING;
          npc->maxWaitTime = 20; // TODO RANDOM
          npc->waitTime = 0;
          npc->pathIndex = 0;
          return;
        }
        npc->pathIndex+=1;
        npc->currentNavNode = npc->path.indexes[npc->pathIndex];
      }
      NavNode cNav = world->navMesh->nodes[npc->currentNavNode];
      NavNode tNav = world->navMesh->nodes[npc->pathIndex];
      npc->collision.pos.x = cNav.pos.x * (1 - npc->walkTimer/NPC_SPEED) + tNav.pos.x * npc->walkTimer/NPC_SPEED;
      npc->collision.pos.y = cNav.pos.y * (1 - npc->walkTimer/NPC_SPEED) + tNav.pos.y * npc->walkTimer/NPC_SPEED;
    break;
  }
}

void updateNPCs(F32 delta, World *world) {
  for(U32 i = 0; i < world->npcCount; i++) {
    updateNPC(delta, &world->npcs[i], world);
  }
}