Fixes Issue #2085 (KHR_materials_emissive_strengh extension) (#2088)

* test-model appears as expected

* removed test resources

* fixed license headers

jme3-plugins/src/gltf/java/com/jme3/scene/plugins/gltf/CustomContentManager.java

@@ -58,6 +58,7 @@ public class CustomContentManager {
         defaultExtensionLoaders.put("KHR_lights_punctual", new LightsPunctualExtensionLoader());
         defaultExtensionLoaders.put("KHR_materials_unlit", new UnlitExtensionLoader());
         defaultExtensionLoaders.put("KHR_texture_transform", new TextureTransformExtensionLoader());
+        defaultExtensionLoaders.put("KHR_materials_emissive_strength", new PBREmissiveStrengthExtensionLoader());
     }
 
     void init(GltfLoader gltfLoader) {

jme3-plugins/src/gltf/java/com/jme3/scene/plugins/gltf/PBREmissiveStrengthExtensionLoader.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2023 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.scene.plugins.gltf;
+
+import com.jme3.asset.AssetKey;
+import com.jme3.plugins.json.JsonElement;
+import java.io.IOException;
+
+/**
+ * Extension loader for "KHR_materials_emissive_strength".
+ * 
+ * @author codex
+ */
+public class PBREmissiveStrengthExtensionLoader implements ExtensionLoader {
+    
+    private PBREmissiveStrengthMaterialAdapter materialAdapter = new PBREmissiveStrengthMaterialAdapter();
+    
+    @Override
+    public Object handleExtension(GltfLoader loader, String parentName, JsonElement parent, JsonElement extension, Object input) throws IOException {
+        MaterialAdapter adapter = materialAdapter;
+        AssetKey key = loader.getInfo().getKey();
+        //check for a custom adapter for emissive strength
+        if (key instanceof GltfModelKey) {
+            MaterialAdapter custom = ((GltfModelKey)key).getAdapterForMaterial("pbrEmissiveStrength");
+            if (custom != null) {
+                adapter = custom;
+            }
+        }        
+        adapter.init(loader.getInfo().getManager());
+        adapter.setParam("emissiveStrength", GltfUtils.getAsFloat(extension.getAsJsonObject(), "emissiveStrength"));
+        return adapter;
+    }
+    
+}

jme3-plugins/src/gltf/java/com/jme3/scene/plugins/gltf/PBREmissiveStrengthMaterialAdapter.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2023 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.scene.plugins.gltf;
+
+/**
+ * Adapter for converting GLTF emissive strength to JME emissive intensity.
+ * 
+ * @author codex
+ */
+public class PBREmissiveStrengthMaterialAdapter extends PBRMaterialAdapter {
+    
+    public PBREmissiveStrengthMaterialAdapter() {
+        super();
+        addParamMapping("emissiveStrength", "EmissiveIntensity");
+    }
+    
+}