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Simplified checkIfWallsBetween calculation.

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This commit is contained in:
MobiusDev 2016-02-16 07:56:21 +00:00
parent 81be59fcd2
commit 654b5748d3
1 changed files with 15 additions and 23 deletions
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36
trunk/java/com/l2jmobius/gameserver/data/xml/impl/WallData.java
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@ -119,31 +119,23 @@ public class WallData implements IXmlReader
for (WallHolder wall : allWalls)
{
boolean intersectFace = false;
for (int i = 0; i < 2; i++)
// lower part of the multiplier fraction, if it is 0 we avoid an error and also know that the lines are parallel
final int denominator = ((ty - y) * (wall.getPoint1X() - wall.getPoint2X())) - ((tx - x) * (wall.getPoint1Y() - wall.getPoint2Y()));
if (denominator == 0)
{
// lower part of the multiplier fraction, if it is 0 we avoid an error and also know that the lines are parallel
final int denominator = ((ty - y) * (wall.getPoint1X() - wall.getPoint2X())) - ((tx - x) * (wall.getPoint1Y() - wall.getPoint2Y()));
if (denominator == 0)
{
continue;
}
continue;
}
// multipliers to the equations of the lines. If they are lower than 0 or bigger than 1, we know that segments don't intersect
final float multiplier1 = (float) (((wall.getPoint2X() - wall.getPoint1X()) * (y - wall.getPoint1Y())) - ((wall.getPoint2Y() - wall.getPoint1Y()) * (x - wall.getPoint1X()))) / denominator;
final float multiplier2 = (float) (((tx - x) * (y - wall.getPoint1Y())) - ((ty - y) * (x - wall.getPoint1X()))) / denominator;
if ((multiplier1 >= 0) && (multiplier1 <= 1) && (multiplier2 >= 0) && (multiplier2 <= 1))
// multipliers to the equations of the lines. If they are lower than 0 or bigger than 1, we know that segments don't intersect
final float multiplier1 = (float) (((wall.getPoint2X() - wall.getPoint1X()) * (y - wall.getPoint1Y())) - ((wall.getPoint2Y() - wall.getPoint1Y()) * (x - wall.getPoint1X()))) / denominator;
final float multiplier2 = (float) (((tx - x) * (y - wall.getPoint1Y())) - ((ty - y) * (x - wall.getPoint1X()))) / denominator;
if ((multiplier1 >= 0) && (multiplier1 <= 1) && (multiplier2 >= 0) && (multiplier2 <= 1))
{
final int intersectZ = Math.round(z + (multiplier1 * (tz - z)));
// now checking if the resulting point is between door's min and max z
if ((intersectZ > wall.getZMin()) && (intersectZ < wall.getZMax()))
{
final int intersectZ = Math.round(z + (multiplier1 * (tz - z)));
// now checking if the resulting point is between door's min and max z
if ((intersectZ > wall.getZMin()) && (intersectZ < wall.getZMax()))
{
if (intersectFace)
{
return true;
}
intersectFace = true;
}
return true;
}
}
}