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Attempt to fix a ray-tracing issue.

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This commit is contained in:
asofold 2015-03-07 03:07:48 +01:00
parent 0932edd6ee
commit d564cf17e9
2 changed files with 24 additions and 15 deletions
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19
NCPCore/src/main/java/fr/neatmonster/nocheatplus/utilities/RayTracing.java
View File

@ -21,6 +21,9 @@ public abstract class RayTracing {
/** Current block. */
protected int blockX, blockY, blockZ;
/** End block. */
protected int endBlockX, endBlockY, endBlockZ;
/** Offset within current block. */
protected double oX, oY, oZ;
@ -67,6 +70,9 @@ public abstract class RayTracing {
blockX = Location.locToBlock(x0);
blockY = Location.locToBlock(y0);
blockZ = Location.locToBlock(z0);
endBlockX = Location.locToBlock(x1);
endBlockY = Location.locToBlock(y1);
endBlockZ = Location.locToBlock(z1);
oX = (double) (x0 - blockX);
oY = (double) (y0 - blockY);
oZ = (double) (z0 - blockZ);
@ -74,11 +80,11 @@ public abstract class RayTracing {
step = 0;
}
private static final double tDiff(final double dTotal, final double offset){
private static final double tDiff(final double dTotal, final double offset, final int block, final int endBlock){
if (dTotal > 0.0){
if (offset >= 1.0) {
// Static block change (e.g. diagonal move).
return 0.0;
return block == endBlock ? Double.MAX_VALUE : 0.0;
} else {
return (1.0 - offset) / dTotal;
}
@ -86,7 +92,7 @@ public abstract class RayTracing {
else if (dTotal < 0.0){
if (offset <= 0.0) {
// Static block change (e.g. diagonal move).
return 0.0;
return block == endBlock ? Double.MAX_VALUE : 0.0;
} else {
return offset / -dTotal;
}
@ -107,9 +113,9 @@ public abstract class RayTracing {
boolean changed;
while (1.0 - t > tol){
// Determine smallest time to block edge.
tX = tDiff(dX, oX);
tY = tDiff(dY, oY);
tZ = tDiff(dZ, oZ);
tX = tDiff(dX, oX, blockX, endBlockX);
tY = tDiff(dY, oY, blockY, endBlockY);
tZ = tDiff(dZ, oZ, blockZ, endBlockZ);
tMin = Math.min(tX, Math.min(tY, tZ));
if (tMin == Double.MAX_VALUE) {
// All differences are 0 (no progress).
@ -186,6 +192,7 @@ public abstract class RayTracing {
break;
}
}
// TODO: Catch special case with going beyond coordinates.
}
/**

20
NCPPlugin/src/test/java/fr/neatmonster/nocheatplus/test/TestRayTracing.java
View File

@ -14,6 +14,8 @@ import fr.neatmonster.nocheatplus.utilities.build.BuildParameters;
public class TestRayTracing {
// TODO: Add a test that fails if going beyond target block coordinate.
protected static final Random random = new Random(System.nanoTime() + 13391);
protected static double maxFactor = 9.0;
@ -90,9 +92,9 @@ public class TestRayTracing {
step = 0;
}
// private boolean ignEdge(double offset, double dTotal){
// return offset == 1 && dTotal > 0 || offset == 0 && dTotal < 0;
// }
// private boolean ignEdge(double offset, double dTotal){
// return offset == 1 && dTotal > 0 || offset == 0 && dTotal < 0;
// }
@Override
protected boolean step(int blockX, int blockY, int blockZ, double oX, double oY, double oZ, double dT) {
@ -102,13 +104,13 @@ public class TestRayTracing {
if (dT < 0.0){
doFail("dT < 0 at t = " + StringUtil.fdec3.format(t), coords);
}
// TODO: Check if this check makes sense at all (dT=0 happens during multi-transitions.)l.
// if (dT == 0.0 && 1.0 - (t + dT) > tol){
// if (!ignEdge(oX, dX) && !ignEdge(oY, dY) && !ignEdge(oZ, dZ)){
// doFail("Premature dT = 0 at t = " + StringUtil.fdec3.format(t), coords);
// }
// }
// if (dT == 0.0 && 1.0 - (t + dT) > tol){
// if (!ignEdge(oX, dX) && !ignEdge(oY, dY) && !ignEdge(oZ, dZ)){
// doFail("Premature dT = 0 at t = " + StringUtil.fdec3.format(t), coords);
// }
// }
checkOffset(oX, "x");
checkOffset(oY, "y");