ld58/code/game/impl/npc.c

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

void UpdateNPC(F32 delta, NPC *npc, World *world) {
  for(U32 i = 0; i < world->portalCount; i++) {
    if(AABB_Collide(world->portals[0].box, npc->collision)) {
      npc->currentArea = world->portals[0].area;
    }
  }
  switch (npc->mode) {
    case NPC_ACTION_WAITING:
      npc->waitTime+=delta;
      if(npc->waitTime > npc->maxWaitTime) {
        npc->mode = NPC_ACTION_WALKING;
        // TODO change targets to poi's rather than just random nodes
        // TODO choose either global POI's or use NPC custom poi if
        // customPOI is true
        do {
          npc->targetNavNode = Random_U32(&world->random, 0, world->navMesh->nodeCount);
        } while(npc->targetNavNode == npc->currentNavNode);
        npc->path = Nav_Path(world->navMesh, npc->currentNavNode, npc->targetNavNode);
        npc->walkTimer = 0;
      }
    break;
    case NPC_ACTION_WALKING:
      npc->walkTimer+=delta;
      if(npc->walkTimer >= NPC_SPEED){
        npc->walkTimer = 0;
        if(npc->path.nodeCount == npc->pathIndex+1){
          npc->mode = NPC_ACTION_WAITING;
          npc->maxWaitTime = Random_F32(&world->random, 20, 140);
          npc->waitTime = 0;
          npc->currentNavNode = npc->targetNavNode;
          npc->pathIndex = 0;
          return;
        }
        npc->currentNavNode = npc->path.indexes[npc->pathIndex];
        npc->pathIndex+=1;
      }
      NavNode cNav = world->navMesh->nodes[npc->currentNavNode];
      NavNode tNav = world->navMesh->nodes[npc->path.indexes[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 NPCDraw(D_Context *draw, NPC *npc)
{
  G_Outfit *outfit = &npc->outfit;

  R2f pframe = D_AnimationFrame(&outfit->state);

  for (U32 it = 0; it < G_OUTFIT_COMPONENT_COUNT; ++it)
  {
    U32 flipped = (outfit->dir & G_OUTFIT_DIR_FLIPPED) != 0;
    U32 dir = (outfit->dir & ~G_OUTFIT_DIR_FLIPPED);

    U32 tid = outfit->e[dir].e[it];
    if (tid != 0)
    {
      U32 flags = D_RECT_UV_ASPECT | (flipped ? D_RECT_FLIP_X : 0);
      D_Rect(draw, npc->collision.pos.x, npc->collision.pos.y, .texture = tid, .uv = pframe, .flags = flags);
    }
  }
}