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Code Issues

(svn r11738) -Codechange: Refactor realistic acceleration's curve counting to use DirDiffs instead of local tables, and remove an unnecessary loop.

release/0.6
peter1138 2008-01-01 18:12:17 +00:00
parent 24784b7e0d
commit 47d23eb003
1 changed files with 16 additions and 41 deletions
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57
src/train_cmd.cpp
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@ -258,30 +258,6 @@ void TrainConsistChanged(Vehicle* v)
TrainCargoChanged(v);
}
/* These two arrays are used for realistic acceleration. XXX: How should they
* be interpreted? */
static const byte _curve_neighbours45[8][2] = {
{7, 1},
{0, 2},
{1, 3},
{2, 4},
{3, 5},
{4, 6},
{5, 7},
{6, 0},
};
static const byte _curve_neighbours90[8][2] = {
{6, 2},
{7, 3},
{0, 4},
{1, 5},
{2, 6},
{3, 7},
{4, 0},
{5, 1},
};
enum AccelType {
AM_ACCEL,
AM_BRAKE
@ -322,39 +298,38 @@ static int GetTrainAcceleration(Vehicle *v, bool mode)
int pos = 0;
int lastpos = -1;
for (const Vehicle *u = v; u->Next() != NULL; u = u->Next(), pos++) {
Direction dir = u->direction;
Direction ndir = u->Next()->direction;
int i;
Direction this_dir = u->direction;
Direction next_dir = u->Next()->direction;
for (i = 0; i < 2; i++) {
if ( _curve_neighbours45[dir][i] == ndir) {
curvecount[i]++;
if (lastpos != -1) {
numcurve++;
sum += pos - lastpos;
if (pos - lastpos == 1) {
max_speed = 88;
}
DirDiff dirdiff = DirDifference(this_dir, next_dir);
if (dirdiff == DIRDIFF_SAME) continue;
if (dirdiff == DIRDIFF_45LEFT) curvecount[0]++;
if (dirdiff == DIRDIFF_45RIGHT) curvecount[1]++;
if (dirdiff == DIRDIFF_45LEFT || dirdiff == DIRDIFF_45RIGHT) {
if (lastpos != -1) {
numcurve++;
sum += pos - lastpos;
if (pos - lastpos == 1) {
max_speed = 88;
}
lastpos = pos;
}
lastpos = pos;
}
/*if we have a 90 degree turn, fix the speed limit to 60 */
if (_curve_neighbours90[dir][0] == ndir ||
_curve_neighbours90[dir][1] == ndir) {
if (dirdiff == DIRDIFF_90LEFT || dirdiff == DIRDIFF_90RIGHT) {
max_speed = 61;
}
}
if (numcurve > 0) sum /= numcurve;
if ((curvecount[0] != 0 || curvecount[1] != 0) && max_speed > 88) {
int total = curvecount[0] + curvecount[1];
if (curvecount[0] == 1 && curvecount[1] == 1) {
max_speed = absolute_max_speed;
} else if (total > 1) {
if (numcurve > 0) sum /= numcurve;
max_speed = 232 - (13 - Clamp(sum, 1, 12)) * (13 - Clamp(sum, 1, 12));
}
}