1 files changed, 101 insertions, 0 deletions
diff --git a/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ParticlesModifier.java b/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ParticlesModifier.java
new file mode 100644
index 0000000..5a61eb6
--- /dev/null
+++ b/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ParticlesModifier.java
@@ -0,0 +1,101 @@
+package com.jme3.scene.plugins.blender.modifiers;
+
+import com.jme3.effect.ParticleEmitter;
+import com.jme3.effect.shapes.EmitterMeshVertexShape;
+import com.jme3.effect.shapes.EmitterShape;
+import com.jme3.material.Material;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.Mesh;
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.exceptions.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.Pointer;
+import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.blender.materials.MaterialHelper;
+import com.jme3.scene.plugins.blender.particles.ParticlesHelper;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * This modifier allows to add particles to the object.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class ParticlesModifier extends Modifier {
+	private static final Logger LOGGER = Logger.getLogger(MirrorModifier.class.getName());
+	
+	/** Loaded particles emitter. */
+	private ParticleEmitter particleEmitter;
+	
+	/**
+	 * This constructor reads the particles system structure and stores it in
+	 * order to apply it later to the node.
+	 * 
+	 * @param modifierStructure
+	 *            the structure of the modifier
+	 * @param blenderContext
+	 *            the blender context
+	 * @throws BlenderFileException
+	 *             an exception is throw wneh there are problems with the
+	 *             blender file
+	 */
+	public ParticlesModifier(Structure modifierStructure, BlenderContext blenderContext) throws BlenderFileException {
+		if(this.validate(modifierStructure, blenderContext)) {
+			Pointer pParticleSystem = (Pointer) modifierStructure.getFieldValue("psys");
+			if (pParticleSystem.isNotNull()) {
+				ParticlesHelper particlesHelper = blenderContext.getHelper(ParticlesHelper.class);
+				Structure particleSystem = pParticleSystem.fetchData(blenderContext.getInputStream()).get(0);
+				particleEmitter = particlesHelper.toParticleEmitter(particleSystem, blenderContext);
+			}
+		}
+	}
+
+	@Override
+	public Node apply(Node node, BlenderContext blenderContext) {
+		if(invalid) {
+			LOGGER.log(Level.WARNING, "Particles modifier is invalid! Cannot be applied to: {0}", node.getName());
+			return node;
+		}
+		
+		MaterialHelper materialHelper = blenderContext.getHelper(MaterialHelper.class);
+		ParticleEmitter emitter = particleEmitter.clone();
+
+		// veryfying the alpha function for particles' texture
+		Integer alphaFunction = MaterialHelper.ALPHA_MASK_HYPERBOLE;
+		char nameSuffix = emitter.getName().charAt(emitter.getName().length() - 1);
+		if (nameSuffix == 'B' || nameSuffix == 'N') {
+			alphaFunction = MaterialHelper.ALPHA_MASK_NONE;
+		}
+		// removing the type suffix from the name
+		emitter.setName(emitter.getName().substring(0, emitter.getName().length() - 1));
+
+		// applying emitter shape
+		EmitterShape emitterShape = emitter.getShape();
+		List<Mesh> meshes = new ArrayList<Mesh>();
+		for (Spatial spatial : node.getChildren()) {
+			if (spatial instanceof Geometry) {
+				Mesh mesh = ((Geometry) spatial).getMesh();
+				if (mesh != null) {
+					meshes.add(mesh);
+					Material material = materialHelper.getParticlesMaterial(
+							((Geometry) spatial).getMaterial(), alphaFunction, blenderContext);
+					emitter.setMaterial(material);// TODO: divide into several pieces
+				}
+			}
+		}
+		if (meshes.size() > 0 && emitterShape instanceof EmitterMeshVertexShape) {
+			((EmitterMeshVertexShape) emitterShape).setMeshes(meshes);
+		}
+
+		node.attachChild(emitter);
+		return node;
+	}
+
+	@Override
+	public String getType() {
+		return Modifier.PARTICLE_MODIFIER_DATA;
+	}
+}