Link preview camera to player movement

docs/PORTING.md

@@ -306,6 +306,12 @@ screens while Explore mode is active. Movement, jump, and sneak now move the
 remote camera even though Minecraft suspends normal gameplay key states while
 a GUI is open.
 
+Version 0.2.16.8 links Explore mode to real player movement in the current
+dimension. Entering Explore anchors the source player and destination camera;
+walking, jumping, falling, or being moved shifts the snapshot camera by the
+same displacement while the book remains open and normal collision still
+applies.
+
 The preview code is separated behind a renderer interface and uses an isolated
 Ponder level populated from server-authoritative destination snapshots.
 

gradle.properties

@@ -35,7 +35,7 @@ mod_name=Rivencraft
 # The license of the mod. Review your options at https://choosealicense.com/. All Rights Reserved is the default.
 mod_license=LGPL-3.0-or-later
 # The mod version. Rivencraft uses the x.y.z.b policy documented in README.md.
-mod_version=0.2.16.7
+mod_version=0.2.16.8
 immersive_portals_version=6.0.7
 # The group ID for the mod. It is only important when publishing as an artifact to a Maven repository.
 # This should match the base package used for the mod sources.

src/main/java/net/dnorberg/rivencraft/client/preview/ImmersivePortalsDestinationPreviewRenderer.java

@@ -24,6 +24,8 @@ public final class ImmersivePortalsDestinationPreviewRenderer implements Destina
     private final Minecraft minecraft = Minecraft.getInstance();
     private LinkPreviewPayload destination;
     private Vec3 cameraPosition;
+    private Vec3 explorationPlayerOrigin;
+    private Vec3 explorationCameraOrigin;
     private float yaw;
     private float pitch;
     private int ticks;
@@ -48,17 +50,8 @@ public final class ImmersivePortalsDestinationPreviewRenderer implements Destina
         if (!exploring || cameraPosition == null) {
             return;
         }
-        double forward = (movingForward ? 1.0D : 0.0D) - (movingBackward ? 1.0D : 0.0D);
+        if (minecraft.player != null && explorationPlayerOrigin != null && explorationCameraOrigin != null) {
-        double strafe = (movingRight ? 1.0D : 0.0D) - (movingLeft ? 1.0D : 0.0D);
+            cameraPosition = explorationCameraOrigin.add(minecraft.player.position().subtract(explorationPlayerOrigin));
-        double vertical = (movingUp ? 1.0D : 0.0D) - (movingDown ? 1.0D : 0.0D);
-        double radians = Math.toRadians(yaw);
-        Vec3 motion = new Vec3(
-                -Math.sin(radians) * forward + Math.cos(radians) * strafe,
-                vertical,
-                Math.cos(radians) * forward + Math.sin(radians) * strafe
-        );
-        if (motion.lengthSqr() > 0.0D) {
-            cameraPosition = cameraPosition.add(motion.normalize().scale(0.22D));
         }
     }
 
@@ -128,7 +121,18 @@ public final class ImmersivePortalsDestinationPreviewRenderer implements Destina
 
     @Override public boolean supportsExploration() { return true; }
     @Override public boolean isExploring() { return exploring; }
-    @Override public void setExploring(boolean exploring) { this.exploring = exploring; }
+    @Override
+    public void setExploring(boolean exploring) {
+        this.exploring = exploring;
+        if (exploring && minecraft.player != null) {
+            explorationPlayerOrigin = minecraft.player.position();
+            explorationCameraOrigin = cameraPosition;
+        } else {
+            clearMovement();
+            explorationPlayerOrigin = null;
+            explorationCameraOrigin = null;
+        }
+    }
 
     @Override
     public void rotate(double deltaX, double deltaY) {
@@ -143,12 +147,25 @@ public final class ImmersivePortalsDestinationPreviewRenderer implements Destina
         if (!exploring) {
             return false;
         }
-        if (minecraft.options.keyUp.matches(keyCode, scanCode)) movingForward = true;
+        if (minecraft.options.keyUp.matches(keyCode, scanCode)) {
-        else if (minecraft.options.keyDown.matches(keyCode, scanCode)) movingBackward = true;
+            movingForward = true;
-        else if (minecraft.options.keyLeft.matches(keyCode, scanCode)) movingLeft = true;
+            minecraft.options.keyUp.setDown(true);
-        else if (minecraft.options.keyRight.matches(keyCode, scanCode)) movingRight = true;
+        } else if (minecraft.options.keyDown.matches(keyCode, scanCode)) {
-        else if (minecraft.options.keyJump.matches(keyCode, scanCode)) movingUp = true;
+            movingBackward = true;
-        else if (minecraft.options.keyShift.matches(keyCode, scanCode)) movingDown = true;
+            minecraft.options.keyDown.setDown(true);
+        } else if (minecraft.options.keyLeft.matches(keyCode, scanCode)) {
+            movingLeft = true;
+            minecraft.options.keyLeft.setDown(true);
+        } else if (minecraft.options.keyRight.matches(keyCode, scanCode)) {
+            movingRight = true;
+            minecraft.options.keyRight.setDown(true);
+        } else if (minecraft.options.keyJump.matches(keyCode, scanCode)) {
+            movingUp = true;
+            minecraft.options.keyJump.setDown(true);
+        } else if (minecraft.options.keyShift.matches(keyCode, scanCode)) {
+            movingDown = true;
+            minecraft.options.keyShift.setDown(true);
+        }
         else return false;
         return true;
     }
@@ -156,12 +173,25 @@ public final class ImmersivePortalsDestinationPreviewRenderer implements Destina
     @Override
     public boolean keyReleased(int keyCode, int scanCode) {
         boolean handled = true;
-        if (minecraft.options.keyUp.matches(keyCode, scanCode)) movingForward = false;
+        if (minecraft.options.keyUp.matches(keyCode, scanCode)) {
-        else if (minecraft.options.keyDown.matches(keyCode, scanCode)) movingBackward = false;
+            movingForward = false;
-        else if (minecraft.options.keyLeft.matches(keyCode, scanCode)) movingLeft = false;
+            minecraft.options.keyUp.setDown(false);
-        else if (minecraft.options.keyRight.matches(keyCode, scanCode)) movingRight = false;
+        } else if (minecraft.options.keyDown.matches(keyCode, scanCode)) {
-        else if (minecraft.options.keyJump.matches(keyCode, scanCode)) movingUp = false;
+            movingBackward = false;
-        else if (minecraft.options.keyShift.matches(keyCode, scanCode)) movingDown = false;
+            minecraft.options.keyDown.setDown(false);
+        } else if (minecraft.options.keyLeft.matches(keyCode, scanCode)) {
+            movingLeft = false;
+            minecraft.options.keyLeft.setDown(false);
+        } else if (minecraft.options.keyRight.matches(keyCode, scanCode)) {
+            movingRight = false;
+            minecraft.options.keyRight.setDown(false);
+        } else if (minecraft.options.keyJump.matches(keyCode, scanCode)) {
+            movingUp = false;
+            minecraft.options.keyJump.setDown(false);
+        } else if (minecraft.options.keyShift.matches(keyCode, scanCode)) {
+            movingDown = false;
+            minecraft.options.keyShift.setDown(false);
+        }
         else handled = false;
         return handled;
     }
@@ -173,12 +203,20 @@ public final class ImmersivePortalsDestinationPreviewRenderer implements Destina
         movingRight = false;
         movingUp = false;
         movingDown = false;
+        minecraft.options.keyUp.setDown(false);
+        minecraft.options.keyDown.setDown(false);
+        minecraft.options.keyLeft.setDown(false);
+        minecraft.options.keyRight.setDown(false);
+        minecraft.options.keyJump.setDown(false);
+        minecraft.options.keyShift.setDown(false);
     }
 
     @Override
     public void resetView() {
         exploring = false;
         clearMovement();
+        explorationPlayerOrigin = null;
+        explorationCameraOrigin = null;
         if (destination != null) {
             cameraPosition = Vec3.atCenterOf(destination.origin()).add(0.0D, 2.0D, ORBIT_RADIUS);
             yaw = destination.yaw();