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This commit is contained in:
Hudson Riggs
2026-02-12 15:51:25 -05:00
parent d4114eb6c6
commit 0127c1d0c7
5 changed files with 135 additions and 87 deletions
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75
tools/java/BaseVehicleConstraintPatch.java
View File

@@ -20,8 +20,13 @@ import org.objectweb.asm.tree.MethodNode;
public final class BaseVehicleConstraintPatch {
private static final String TARGET_NAME = "addPointConstraint";
private static final String CONSTRAINT_CHANGED_NAME = "constraintChanged";
private static final String IS_ENTER_BLOCKED_NAME = "isEnterBlocked";
private static final String IS_ENTER_BLOCKED2_NAME = "isEnterBlocked2";
private static final String CLINIT_NAME = "<clinit>";
private static final String VOID_NOARG_DESC = "()V";
private static final String ENTER_BLOCKED_DESC = "(Lzombie/characters/IsoGameCharacter;I)Z";
private static final String EXIT_BLOCKED_DESC = "(Lzombie/characters/IsoGameCharacter;I)Z";
private static final String EXIT_BLOCKED2_DESC = "(I)Z";
private static final String PATCH_LOG_LINE = "[Landtrain][BaseVehiclePatch] BaseVehicle override enabled";
private static final String BREAK_DESC_OBJECT_BOOL = "(ZLjava/lang/Boolean;)V";
private static final String BREAK_DESC_PRIMITIVE_BOOL = "(ZZ)V";
@@ -31,6 +36,11 @@ public final class BaseVehicleConstraintPatch {
private static final String HELPER_METHOD = "resolveConstraintDriver";
private static final String HELPER_DESC =
"(Lzombie/vehicles/BaseVehicle;)Lzombie/characters/IsoGameCharacter;";
private static final String HELPER_ENTER_BLOCKED = "isEnterBlockedLandtrain";
private static final String HELPER_ENTER_BLOCKED_DESC =
"(Lzombie/vehicles/BaseVehicle;Lzombie/characters/IsoGameCharacter;I)Z";
private static final String HELPER_ENTER_BLOCKED2 = "isEnterBlocked2Landtrain";
private static final String HELPER_ENTER_BLOCKED2_DESC = "(Lzombie/vehicles/BaseVehicle;I)Z";
private BaseVehicleConstraintPatch() {
}
@@ -51,6 +61,8 @@ public final class BaseVehicleConstraintPatch {
int removedCalls = 0;
int inspectedAddPointMethods = 0;
int patchedConstraintDriverCalls = 0;
int patchedEnterBlockedCalls = 0;
int patchedEnterBlocked2Calls = 0;
for (MethodNode method : classNode.methods) {
if (TARGET_NAME.equals(method.name) && isTargetAddPointConstraint(method.desc)) {
@@ -59,6 +71,22 @@ public final class BaseVehicleConstraintPatch {
} else if (CONSTRAINT_CHANGED_NAME.equals(method.name)
&& VOID_NOARG_DESC.equals(method.desc)) {
patchedConstraintDriverCalls += patchConstraintChangedDriverCalls(method);
} else if (IS_ENTER_BLOCKED_NAME.equals(method.name)
&& ENTER_BLOCKED_DESC.equals(method.desc)) {
patchedEnterBlockedCalls += patchEnterBlockedCall(
method,
"isExitBlocked",
EXIT_BLOCKED_DESC,
HELPER_ENTER_BLOCKED,
HELPER_ENTER_BLOCKED_DESC);
} else if (IS_ENTER_BLOCKED2_NAME.equals(method.name)
&& ENTER_BLOCKED_DESC.equals(method.desc)) {
patchedEnterBlocked2Calls += patchEnterBlockedCall(
method,
"isExitBlocked2",
EXIT_BLOCKED2_DESC,
HELPER_ENTER_BLOCKED2,
HELPER_ENTER_BLOCKED2_DESC);
}
}
@@ -75,6 +103,14 @@ public final class BaseVehicleConstraintPatch {
"Expected to patch at least 1 constraintChanged getDriver call, patched "
+ patchedConstraintDriverCalls);
}
if (patchedEnterBlockedCalls < 1) {
throw new IllegalStateException(
"Expected to patch isEnterBlocked call, patched " + patchedEnterBlockedCalls);
}
if (patchedEnterBlocked2Calls < 1) {
throw new IllegalStateException(
"Expected to patch isEnterBlocked2 call, patched " + patchedEnterBlocked2Calls);
}
if (!ensureClassInitLog(classNode)) {
throw new IllegalStateException("Failed to inject BaseVehicle class-init debug log");
}
@@ -89,6 +125,10 @@ public final class BaseVehicleConstraintPatch {
+ removedCalls
+ ", constraint driver hooks: "
+ patchedConstraintDriverCalls
+ ", enter-block hooks: "
+ patchedEnterBlockedCalls
+ "/"
+ patchedEnterBlocked2Calls
+ ", class-init debug log: enabled");
}
@@ -158,6 +198,41 @@ public final class BaseVehicleConstraintPatch {
return patched;
}
private static int patchEnterBlockedCall(
MethodNode method,
String targetCallName,
String targetCallDesc,
String helperMethod,
String helperDesc) {
int patched = 0;
InsnList insns = method.instructions;
for (AbstractInsnNode node = insns.getFirst(); node != null; ) {
AbstractInsnNode next = node.getNext();
if (!(node instanceof MethodInsnNode call)) {
node = next;
continue;
}
if (!BASE_VEHICLE_OWNER.equals(call.owner)
|| !targetCallName.equals(call.name)
|| !targetCallDesc.equals(call.desc)) {
node = next;
continue;
}
MethodInsnNode replacement =
new MethodInsnNode(
Opcodes.INVOKESTATIC,
HELPER_OWNER,
helperMethod,
helperDesc,
false);
insns.set(call, replacement);
patched++;
node = next;
}
return patched;
}
private static boolean ensureClassInitLog(ClassNode classNode) {
MethodNode clinit = null;
for (MethodNode method : classNode.methods) {

51
tools/java/LandtrainConstraintAuthHelper.java
View File

@@ -1,10 +1,12 @@
package zombie.vehicles;
import java.util.HashSet;
import java.util.Set;
import zombie.characters.IsoGameCharacter;
/**
* Resolves the effective driver for constraint auth in chained towing.
* For middle vehicles in a chain, prefer the front/lead driver's authority.
* For middle vehicles in a chain, scan through links so long trains still resolve authority.
*/
public final class LandtrainConstraintAuthHelper {
private LandtrainConstraintAuthHelper() {
@@ -15,24 +17,49 @@ public final class LandtrainConstraintAuthHelper {
return null;
}
IsoGameCharacter driver = vehicle.getDriver();
if (driver != null) {
return driver;
}
IsoGameCharacter driver = findDriverAlongChain(vehicle, true);
if (driver != null) return driver;
return findDriverAlongChain(vehicle, false);
}
BaseVehicle front = vehicle.getVehicleTowedBy();
if (front != null) {
driver = front.getDriver();
private static IsoGameCharacter findDriverAlongChain(BaseVehicle start, boolean towardFront) {
BaseVehicle cursor = start;
Set<Integer> visited = new HashSet<>();
while (cursor != null) {
int id = cursor.getId();
if (!visited.add(id)) {
// Safety: malformed link graph; stop scanning.
return null;
}
IsoGameCharacter driver = cursor.getDriver();
if (driver != null) {
return driver;
}
}
BaseVehicle rear = vehicle.getVehicleTowing();
if (rear != null) {
return rear.getDriver();
cursor = towardFront ? cursor.getVehicleTowedBy() : cursor.getVehicleTowing();
}
return null;
}
public static boolean isEnterBlockedLandtrain(
BaseVehicle vehicle, IsoGameCharacter chr, int seat) {
if (isVehicleBeingTowedInLandtrain(vehicle)) {
return true;
}
return vehicle != null && vehicle.isExitBlocked(chr, seat);
}
public static boolean isEnterBlocked2Landtrain(BaseVehicle vehicle, int seat) {
if (isVehicleBeingTowedInLandtrain(vehicle)) {
return true;
}
return vehicle != null && vehicle.isExitBlocked2(seat);
}
private static boolean isVehicleBeingTowedInLandtrain(BaseVehicle vehicle) {
return vehicle != null && vehicle.getVehicleTowedBy() != null;
}
}