/* tests for the new dvec format */
static void testDvec (void)
{
short dv1 = 0x0724;
CU_ASSERT_EQUAL(getDVdir(dv1), 0x07);
CU_ASSERT_EQUAL(getDVflags(dv1), 0x02);
CU_ASSERT_EQUAL(getDVz(dv1), 0x04);
short dv2 = makeDV(6, 3);
CU_ASSERT_EQUAL(dv2, 0x0603);
dv2 = setDVz(dv2, 4);
CU_ASSERT_EQUAL(dv2, 0x0604);
}
/**
* @brief Checks if we can walk in the given direction
* First test for opening height availability. Then test for stepup compatibility. Last test for fall.
* @note Fliers use this code only when they are walking.
* @param[in] path Pointer to client or server side pathing table (clPathMap, svPathMap)
* @return false if we can't fly there
*/
bool Step::checkWalkingDirections (const pathing_t *path)
{
int nx, ny, nz;
int passageHeight;
/** @todo falling_height should be replaced with an arbitrary max falling height based on the actor. */
const int fallingHeight = PATHFINDING_MAX_FALL;/**<This is the maximum height that an actor can fall. */
const int stepupHeight = routing.getStepupHeight(actorSize, fromPos[0], fromPos[1], fromPos[2], dir); /**< The actual stepup height without the level flags */
int heightChange;
/** @todo actor_stepup_height should be replaced with an arbitrary max stepup height based on the actor. */
int actorStepupHeight = PATHFINDING_MAX_STEPUP;
/* This is the standard passage height for all units trying to move horizontally. */
passageHeight = routing.getConn(actorSize, fromPos, dir);
if (passageHeight < actorHeight) {
#if 0
/** I know this code could be streamlined, but until I understand it myself, plz leave it like it is !*/
int dvFlagsNew = 0;
if (!crouchingState /* not in std crouch mode */
&& passageHeight >= actorCrouchedHeight) { /* and passage is tall enough for crouching ? */
/* we should try autocrouching */
int dvFlagsOld = getDVflags(RT_AREA_POS(path, fromPos, crouchingState));
int toHeight = routing.getCeiling(actorSize, toPos) - routing.getFloor(actorSize, toPos);
int tuCr = Grid_GetTUsForDirection(dir, 1); /* 1 means crouched */
int newTUs = 0;
if (toHeight >= actorHeight) { /* can we stand in the new cell ? */
if ((dvFlagsOld & DV_FLAG_AUTOCROUCH) /* already in auto-crouch mode ? */
|| (dvFlagsOld & DV_FLAG_AUTOCROUCHED)) {
dvFlagsNew |= DV_FLAG_AUTOCROUCHED; /* keep that ! */
newTUs = tuCr + TU_CROUCH; /* TUs for crouching plus getting up */
}
else {
dvFlagsNew |= DV_FLAG_AUTODIVE;
newTUs = tuCr + 2 * TU_CROUCH; /* TUs for crouching plus getting down and up */
}
}
else { /* we can't stand there */
if (dvFlagsOld & DV_FLAG_AUTOCROUCHED) {
dvFlagsNew |= DV_FLAG_AUTOCROUCHED; /* keep that ! */
newTUs = tuCr; /* TUs just for crouching */
}
else {
dvFlagsNew |= DV_FLAG_AUTOCROUCH; /* get down ! */
newTUs = tuCr + TU_CROUCH; /* TUs for crouching plus getting down */
}
}
}
else
#endif
return false; /* Passage is not tall enough. */
}
/* If we are moving horizontally, use the stepup requirement of the floors.
* The new z coordinate may need to be adjusted from stepup.
* Also, actor_stepup_height must be at least the cell's positive stepup value to move that direction. */
/* If the actor cannot reach stepup, then we can't go this way. */
if (actorStepupHeight < stepupHeight) {
return false; /* Actor cannot stepup high enough. */
}
nx = toPos[0];
ny = toPos[1];
nz = toPos[2];
if (routing.isStepUpLevel(actorSize, fromPos, dir) && toPos[2] < PATHFINDING_HEIGHT - 1) {
toPos[2]++;
/**
* @note If you need to know about how pathfinding works, you need to understand the
* following brief. It may cause nausea, but is an important concept.
*
* @brief OK, now some crazy tests:
* Because of the grid based nature of this game, each cell can have at most only ONE
* floor that can be stood upon. If an actor can walk down a slope that is in the
* same level, and actor should be able to walk on (and not fall into) the slope that
* decends a game level. BUT it is possible for an actor to be able to crawl under a
* floor that can be stood on, with this opening being in the same cell as the floor.
* SO to prevent any conflicts, we will move down a floor under the following conditions:
* - The STEPDOWN flag is set
* - The floor in the immediately adjacent cell is lower than the current floor, but not
* more than CELL_HEIGHT units (in QUANT units) below the current floor.
* - The actor's stepup value is at least the inverse stepup value. This is the stepup
* FROM the cell we are moving towards back into the cell we are starting in. This
* ensures that the actor can actually WALK BACK.
* If the actor does not have a high enough stepup but meets all the other requirements to
* descend the level, the actor will move into a fall state, provided that there is no
* floor in the adjacent cell.
*
* This will prevent actors from walking under a floor in the same cell in order to fall
* to the floor beneath. They will need to be able to step down into the cell or will
* not be able to use the opening.
*/
} else if (routing.isStepDownLevel(actorSize, fromPos, dir) && toPos[2] > 0
&& actorStepupHeight >= routing.getStepupHeight(actorSize, nx, ny, nz - 1, dir ^ 1)) {
toPos[2]--; /* Stepping down into lower cell. */
}
heightChange = routing.getFloor(actorSize, toPos) - routing.getFloor(actorSize, fromPos) + (toPos[2] - fromPos[2]) * CELL_HEIGHT;
/* If the actor tries to fall more than falling_height, then prohibit the move. */
if (heightChange < -fallingHeight && !hasLadderSupport) {
return false; /* Too far a drop without a ladder. */
}
/* If we are walking normally, we can fall if we move into a cell that does not
* have its STEPDOWN flag set and has a negative floor:
* Set heightChange to 0.
* The actor enters the cell.
* The actor will be forced to fall (dir 13) from the destination cell to the cell below. */
if (routing.getFloor(actorSize, toPos) < 0) {
/* We cannot fall if STEPDOWN is defined. */
if (routing.isStepDownLevel(actorSize, fromPos, dir)) {
return false; /* There is stepdown from here. */
}
heightChange = 0;
toPos[2]--;
}
return true;
}
