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package com.jme3.scene.plugins.blender.modifiers;
import com.jme3.math.Vector3f;
import com.jme3.scene.Geometry;
import com.jme3.scene.Mesh;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import com.jme3.scene.VertexBuffer.Type;
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.objects.ObjectHelper;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* This modifier allows to array modifier to the object.
*
* @author Marcin Roguski (Kaelthas)
*/
/*package*/ class MirrorModifier extends Modifier {
private static final Logger LOGGER = Logger.getLogger(MirrorModifier.class.getName());
/** Parameters of the modifier. */
private Map<String, Object> modifierData = new HashMap<String, Object>();
/**
* This constructor reads mirror data from the modifier structure. The
* stored data is a map of parameters for mirror modifier. No additional data
* is loaded.
* When the modifier is applied it is necessary to get the newly created node.
*
* @param objectStructure
* the structure of the object
* @param modifierStructure
* the structure of the modifier
* @param blenderContext
* the blender context
* @throws BlenderFileException
* this exception is thrown when the blender file is somehow
* corrupted
*/
public MirrorModifier(Structure modifierStructure, BlenderContext blenderContext) {
if(this.validate(modifierStructure, blenderContext)) {
modifierData.put("flag", modifierStructure.getFieldValue("flag"));
modifierData.put("tolerance", modifierStructure.getFieldValue("tolerance"));
Pointer pMirrorOb = (Pointer) modifierStructure.getFieldValue("mirror_ob");
if (pMirrorOb.isNotNull()) {
modifierData.put("mirrorob", pMirrorOb);
}
}
}
@Override
public Node apply(Node node, BlenderContext blenderContext) {
if(invalid) {
LOGGER.log(Level.WARNING, "Mirror modifier is invalid! Cannot be applied to: {0}", node.getName());
return node;
}
int flag = ((Number) modifierData.get("flag")).intValue();
float[] mirrorFactor = new float[]{
(flag & 0x08) != 0 ? -1.0f : 1.0f,
(flag & 0x10) != 0 ? -1.0f : 1.0f,
(flag & 0x20) != 0 ? -1.0f : 1.0f
};
float[] center = new float[]{0.0f, 0.0f, 0.0f};
Pointer pObject = (Pointer) modifierData.get("mirrorob");
if (pObject != null) {
Structure objectStructure;
try {
objectStructure = pObject.fetchData(blenderContext.getInputStream()).get(0);
ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
Node object = (Node) objectHelper.toObject(objectStructure, blenderContext);
if (object != null) {
Vector3f translation = object.getWorldTranslation();
center[0] = translation.x;
center[1] = translation.y;
center[2] = translation.z;
}
} catch (BlenderFileException e) {
LOGGER.log(Level.SEVERE, "Cannot load mirror''s reference object. Cause: {0}", e.getLocalizedMessage());
}
}
float tolerance = ((Number) modifierData.get("tolerance")).floatValue();
boolean mirrorU = (flag & 0x01) != 0;
boolean mirrorV = (flag & 0x02) != 0;
// boolean mirrorVGroup = (flag & 0x20) != 0;
List<Geometry> geometriesToAdd = new ArrayList<Geometry>();
for (int mirrorIndex = 0; mirrorIndex < 3; ++mirrorIndex) {
if (mirrorFactor[mirrorIndex] == -1.0f) {
for (Spatial spatial : node.getChildren()) {
if (spatial instanceof Geometry) {
Mesh mesh = ((Geometry) spatial).getMesh();
Mesh clone = mesh.deepClone();
// getting buffers
FloatBuffer position = mesh.getFloatBuffer(Type.Position);
FloatBuffer bindPosePosition = mesh.getFloatBuffer(Type.BindPosePosition);
FloatBuffer clonePosition = clone.getFloatBuffer(Type.Position);
FloatBuffer cloneBindPosePosition = clone.getFloatBuffer(Type.BindPosePosition);
FloatBuffer cloneNormals = clone.getFloatBuffer(Type.Normal);
FloatBuffer cloneBindPoseNormals = clone.getFloatBuffer(Type.BindPoseNormal);
IntBuffer cloneIndexes = (IntBuffer) clone.getBuffer(Type.Index).getData();
// modyfying data
for (int i = mirrorIndex; i < clonePosition.limit(); i += 3) {
float value = clonePosition.get(i);
float d = center[mirrorIndex] - value;
if (Math.abs(d) <= tolerance) {
clonePosition.put(i, center[mirrorIndex]);
cloneBindPosePosition.put(i, center[mirrorIndex]);
position.put(i, center[mirrorIndex]);
bindPosePosition.put(i, center[mirrorIndex]);
} else {
clonePosition.put(i, value + 2.0f * d);
cloneBindPosePosition.put(i, value + 2.0f * d);
}
cloneNormals.put(i, -cloneNormals.get(i));
cloneBindPoseNormals.put(i, -cloneNormals.get(i));
//modifying clone indexes
int vertexIndex = (i - mirrorIndex) / 3;
if (vertexIndex % 3 == 0 && vertexIndex<cloneIndexes.limit()) {
int index = cloneIndexes.get(vertexIndex + 2);
cloneIndexes.put(vertexIndex + 2, cloneIndexes.get(vertexIndex + 1));
cloneIndexes.put(vertexIndex + 1, index);
}
}
if (mirrorU) {
FloatBuffer cloneUVs = (FloatBuffer) clone.getBuffer(Type.TexCoord).getData();
for (int i = 0; i < cloneUVs.limit(); i += 2) {
cloneUVs.put(i, 1.0f - cloneUVs.get(i));
}
}
if (mirrorV) {
FloatBuffer cloneUVs = (FloatBuffer) clone.getBuffer(Type.TexCoord).getData();
for (int i = 1; i < cloneUVs.limit(); i += 2) {
cloneUVs.put(i, 1.0f - cloneUVs.get(i));
}
}
Geometry geometry = new Geometry(null, clone);
geometry.setMaterial(((Geometry) spatial).getMaterial());
geometriesToAdd.add(geometry);
}
}
// adding meshes to node
for (Geometry geometry : geometriesToAdd) {
node.attachChild(geometry);
}
geometriesToAdd.clear();
}
}
return node;
}
@Override
public String getType() {
return Modifier.MIRROR_MODIFIER_DATA;
}
}
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