Animationsübergänge weiter verbessert

blight-editor/src/main/java/de/blight/editor/state/AnimPreviewState.java

@@ -18,6 +18,9 @@ import com.jme3.anim.AnimClip;
 import com.jme3.anim.AnimComposer;
 import com.jme3.anim.SkinningControl;
 import com.jme3.anim.tween.action.Action;
+import com.jme3.anim.tween.action.BlendAction;
+import com.jme3.anim.tween.action.BlendableAction;
+import com.jme3.anim.tween.action.LinearBlendSpace;
 import com.jme3.app.Application;
 import com.jme3.app.SimpleApplication;
 import com.jme3.app.state.BaseAppState;
@@ -86,6 +89,11 @@ public class AnimPreviewState extends BaseAppState {
     private float transitionElapsed = 0.15f;
     private static final float TRANSITION_DURATION = 0.15f;
 
+    private LinearBlendSpace blendSpace     = null;
+    private String           pendingClipName = null;
+    private float            blendElapsed   = 0f;
+    private static final float BLEND_DURATION = TRANSITION_DURATION; // Pose- und Offset-Blend synchron
+
     private Node          axesNode;
 
     public AnimPreviewState(SharedInput input) { this.input = input; }
@@ -208,6 +216,14 @@ public class AnimPreviewState extends BaseAppState {
             try { currentAction.setSpeed(input.animPreviewSpeed); } catch (Exception ignored) {}
         }
 
+        // Blend voranschreiten: BlendWeight 0→1 über BLEND_DURATION
+        if (pendingClipName != null && blendSpace != null && currentModel != null) {
+            blendElapsed += tpf;
+            float bt = Math.min(1f, blendElapsed / BLEND_DURATION);
+            blendSpace.setValue(bt);
+            if (bt >= 1f) finishBlend();
+        }
+
         // Loop-Steuerung: AnimComposer spielt einmal ab – wir starten manuell neu
         if (currentClipName != null && currentModel != null && currentAction != null) {
             AnimComposer ac = findControl(currentModel, AnimComposer.class);
@@ -425,8 +441,6 @@ public class AnimPreviewState extends BaseAppState {
 
     private void playClip(String clipName) {
         if (currentModel == null) return;
-        currentAction   = null;
-        currentClipName = null;
         // Offset für diesen Clip aus der Map lesen (wird von EditorApp befüllt)
         float[] off = input.animPreviewClipOffsets.get(clipName);
         if (off != null && off.length >= 3) {
@@ -443,6 +457,45 @@ public class AnimPreviewState extends BaseAppState {
         // SkinningControls auf dem gesamten Modell aktivieren – AnimComposer und
         // SkinningControl sitzen oft auf verschiedenen Geschwisterknoten.
         setSkinningEnabled(currentModel, true);
+
+        // Wenn schon ein Clip läuft: Freeze-Pose einfrieren + BlendAction.
+        // blend.setTransitionLength(0) verhindert den internen 0.4s-Cross-Fade der
+        // BlendableAction, der sonst parallel zu unserem blendSpace.setValue läuft
+        // und ein "hin und her" erzeugt.
+        AnimComposer ac = findControl(currentModel, AnimComposer.class);
+        SkinningControl sc = findControl(currentModel, SkinningControl.class);
+        if (ac != null && sc != null && ac.getAnimClipsNames().contains(clipName)
+                && (currentClipName != null || pendingClipName != null)) {
+            AnimClip freeze = buildFreezeClip(sc.getArmature());
+            if (freeze != null) {
+                try {
+                    if (ac.hasAnimClip("__freeze__")) ac.removeAnimClip(ac.getAnimClip("__freeze__"));
+                    ac.addAnimClip(freeze);
+                    if (ac.hasAction("__blend__")) ac.removeAction("__blend__");
+                    LinearBlendSpace space = new LinearBlendSpace(0f, 1f);
+                    space.setValue(0f);
+                    BlendAction blend = ac.actionBlended("__blend__", space, "__freeze__", clipName);
+                    blend.clearSpeedFactors();   // N/0=Infinity für length=0 Freeze-Clip vermeiden
+                    blend.setTransitionLength(0.0); // keinen 2. internen Cross-Fade doppelt laufen lassen
+                    ac.getLayer(AnimComposer.DEFAULT_LAYER).setCurrentAction(blend);
+                    blendSpace      = space;
+                    pendingClipName = clipName;
+                    blendElapsed    = 0f;
+                    currentAction   = blend;
+                    currentClipName = null;
+                    return;
+                } catch (Exception e) {
+                    LOG.warn("[AnimPreview] BlendAction fehlgeschlagen, direktes Wechseln: {}", e.getMessage());
+                    blendSpace      = null;
+                    pendingClipName = null;
+                }
+            }
+        }
+
+        currentAction   = null;
+        currentClipName = null;
+        pendingClipName = null;
+        blendSpace      = null;
         playOnSpatial(currentModel, clipName);
     }
 
@@ -1151,6 +1204,51 @@ public class AnimPreviewState extends BaseAppState {
         return clip;
     }
 
+    @SuppressWarnings("rawtypes")
+    private static AnimClip buildFreezeClip(com.jme3.anim.Armature arm) {
+        int n = arm.getJointCount();
+        if (n == 0) return null;
+        AnimClip clip = new AnimClip("__freeze__");
+        com.jme3.anim.AnimTrack[] tracks = new com.jme3.anim.AnimTrack[n];
+        for (int i = 0; i < n; i++) {
+            com.jme3.anim.Joint j = arm.getJoint(i);
+            com.jme3.math.Transform lt = j.getLocalTransform();
+            tracks[i] = new com.jme3.anim.TransformTrack(
+                j, new float[]{0f},
+                new com.jme3.math.Vector3f[]{lt.getTranslation().clone()},
+                new com.jme3.math.Quaternion[]{lt.getRotation().clone()},
+                new com.jme3.math.Vector3f[]{lt.getScale().clone()});
+        }
+        clip.setTracks(tracks);
+        return clip;
+    }
+
+    private void finishBlend() {
+        String clipName = pendingClipName;
+        float elapsed   = blendElapsed;
+        pendingClipName = null;
+        blendSpace      = null;
+        if (currentModel == null || clipName == null) return;
+        AnimComposer ac = findControl(currentModel, AnimComposer.class);
+        if (ac == null) return;
+        if (ac.hasAction("__blend__")) ac.removeAction("__blend__");
+        try {
+            // transitionLength=0 verhindert den Default-0.4s-Cross-Fade nach dem Blend
+            Action next = ac.action(clipName);
+            if (next instanceof BlendableAction ba) ba.setTransitionLength(0.0);
+            currentAction   = ac.setCurrentAction(clipName);
+            currentClipName = clipName;
+            if (currentAction != null) {
+                currentAction.setSpeed(input.animPreviewSpeed);
+                input.animPreviewCurrentClipDuration = (float) currentAction.getLength();
+                double len = currentAction.getLength();
+                if (len > 0.01 && elapsed > 0) ac.setTime(elapsed % len);
+            }
+        } catch (Exception e) {
+            LOG.warn("[AnimPreview] Direkt-Wechsel nach Blend fehlgeschlagen: {}", e.getMessage());
+        }
+    }
+
     private static final String[] MODEL_SAVE_ROOTS = {
         null,  // ASSET_ROOT (src) – wird durch ASSET_ROOT ersetzt
         "blight-assets/bin/main",