/**
* @brief Calculated the new height level when something falls down from a certain position.
* @param[in] map Pointer to client or server side routing table (clMap, svMap)
* @param[in] pos Position in the map to start the fall (starting height is the z-value in this position)
* @param[in] actorSize Give the field size of the actor (e.g. for 2x2 units) to check linked fields as well.
* @return New z (height) value.
* @return 0xFF if an error occurred.
*/
pos_t Grid_Fall (const routing_t *map, const actorSizeEnum_t actorSize, const pos3_t pos)
{
int z = pos[2], base, diff;
qboolean flier = qfalse; /** @todo if an actor can fly, then set this to true. */
/* Is z off the map? */
if (z >= PATHFINDING_HEIGHT) {
Com_DPrintf(DEBUG_PATHING, "Grid_Fall: z (height) out of bounds): z=%i max=%i\n", z, PATHFINDING_HEIGHT);
return 0xFF;
}
/* If we can fly, then obviously we won't fall. */
if (flier)
return z;
/* Easy math- get the floor, integer divide by CELL_HEIGHT, add to z.
* If z < 0, we are going down.
* If z >= CELL_HEIGHT, we are going up.
* If 0 <= z <= CELL_HEIGHT, then z / 16 = 0, no change. */
base = RT_FLOOR(map, actorSize, pos[0], pos[1], z);
/* Hack to deal with negative numbers- otherwise rounds toward 0 instead of down. */
diff = base < 0 ? (base - (CELL_HEIGHT - 1)) / CELL_HEIGHT : base / CELL_HEIGHT;
z += diff;
/* The tracing code will set locations without a floor to -1. Compensate for that. */
if (z < 0)
z = 0;
else if (z >= PATHFINDING_HEIGHT)
z = PATHFINDING_HEIGHT - 1;
return z;
}
/**
* @brief Returns the height of the floor in a cell.
* @param[in] map Pointer to client or server side routing table (clMap, svMap)
* @param[in] actorSize width of the actor in cells
* @param[in] pos Position in the map to check the height
* @return The actual model height of the cell's floor.
*/
int Grid_Floor (const routing_t *map, const actorSizeEnum_t actorSize, const pos3_t pos)
{
/* max 8 levels */
if (pos[2] >= PATHFINDING_HEIGHT) {
Com_Printf("Grid_Floor: Warning: z level is bigger than %i: %i\n",
(PATHFINDING_HEIGHT - 1), pos[2]);
}
return QuantToModel(RT_FLOOR(map, actorSize, pos[0], pos[1], pos[2] & (PATHFINDING_HEIGHT - 1)));
}
/**
* @brief evaluate access state for given position for given routing data
* @param routes routing data
* @param pos position to evaluate
* @return access state as enum value for later rendering
*/
static EAccessState evaluateAccessState (const routing_t routes[ACTOR_MAX_SIZE], const pos3_t pos, const int actorSize)
{
const int height = QuantToModel(RT_CEILING(routes, actorSize, pos[0], pos[1], pos[2] & (PATHFINDING_HEIGHT - 1))
- RT_FLOOR(routes, actorSize, pos[0], pos[1], pos[2] & (PATHFINDING_HEIGHT - 1)));
if (height >= PLAYER_STANDING_HEIGHT)
return ACC_STAND;
else if (height >= PLAYER_CROUCHING_HEIGHT)
return ACC_CROUCH;
else
return ACC_DISABLED;
}
