Examples with Element org.eaxy.Element used on opensource projects

Example 1 with Element

use of org.eaxy.Element in project Terasology by MovingBlocks.

the class ColladaLoader method parseSource.

private Source parseSource(Element sourceElement) throws ColladaParseException {
    Source source = new Source();
    ElementSet accessorSet = sourceElement.find("technique_common", "accessor");
    if (1 != accessorSet.size()) {
        throw new ColladaParseException("Found " + accessorSet.size() + " accessor sets for sourceElement id=" + sourceElement.id() + " name=" + sourceElement.name());
    }
    Element accessor = accessorSet.first();
    String accessorCount = accessor.attr("count");
    source.count = Integer.parseInt(accessorCount);
    String accessorStride = accessor.attr("stride");
    if (null != accessorStride) {
        source.stride = Integer.parseInt(accessorStride);
    }
    String accessorSource = accessor.attr("source");
    source.accessorSource = accessorSource;
    ElementSet paramSet = accessor.find("param");
    int paramSize = paramSet.size();
    source.parameterNames = new String[paramSize];
    source.parameterTypes = new String[paramSize];
    for (int i = 0; i < paramSize; i++) {
        Element param = paramSet.get(i);
        source.parameterNames[i] = param.attr("name");
        source.parameterTypes[i] = param.attr("type");
    }
    Element objectArray = sourceElement.select(accessorSource);
    if (null == objectArray) {
        throw new ColladaParseException("Unable to find id " + accessorSource + " for float array in sourceElement id=" + sourceElement.id() + " name=" + sourceElement.name());
    }
    String arraySizeString = objectArray.attr("count");
    int arraySize = Integer.parseInt(arraySizeString);
    String objectArrayDataString = objectArray.text().trim();
    // TODO: we should really parse each parameter type, but we'll assume they are homogeneneous for now
    if (("float".equalsIgnoreCase(source.parameterTypes[0])) || ("float4x4".equalsIgnoreCase(source.parameterTypes[0]))) {
        source.floatValues = new float[arraySize];
        String[] floatStrings = getItemsInString(objectArrayDataString);
        if (floatStrings.length != arraySize) {
            throw new ColladaParseException("Expected float array size " + arraySize + " but was " + floatStrings.length + " for sourceElement id=" + sourceElement.id() + " name=" + sourceElement.name());
        }
        for (int i = 0; i < floatStrings.length; i++) {
            String floatString = floatStrings[i];
            source.floatValues[i] = Float.parseFloat(floatString);
        }
    } else if ("name".equalsIgnoreCase(source.parameterTypes[0])) {
        source.nameValues = new String[arraySize];
        String[] nameStrings = getItemsInString(objectArrayDataString);
        if (nameStrings.length != arraySize) {
            throw new ColladaParseException("Expected name array size " + arraySize + " but was " + nameStrings.length + " for sourceElement id=" + sourceElement.id() + " name=" + sourceElement.name());
        }
        for (int i = 0; i < nameStrings.length; i++) {
            source.nameValues[i] = nameStrings[i];
        }
    } else {
        throw new ColladaParseException("Unsupported parameter type " + source.parameterTypes[0]);
    }
    return source;
}

Example 2 with Element

use of org.eaxy.Element in project Terasology by MovingBlocks.

the class ColladaLoader method createMD5Joint.

private MD5Joint createMD5Joint(Element jointNodeElement) throws ColladaParseException {
    MD5Joint md5Joint = new MD5Joint();
    ElementSet matrixSet = jointNodeElement.find("matrix");
    if (1 == matrixSet.size()) {
        Element matrix = matrixSet.first();
        String floatStringArray = matrix.text();
        String[] floatStrings = getItemsInString(floatStringArray);
        if (floatStrings.length != 16) {
            throw new ColladaParseException("Found float list of " + floatStrings.length + " instead of 16 for joint matrix sets for element " + jointNodeElement.id());
        }
        float[] matrixDataArray = new float[16];
        for (int i = 0; i < floatStrings.length; i++) {
            String floatString = floatStrings[i];
            matrixDataArray[i] = Float.parseFloat(floatString);
        }
        Quat4f[] jointMatrix = quad4fArrayFromFloat16ArrayData(matrixDataArray);
        Vector3f[] positionVectorArray = positionFromFloat16ArrayData(matrixDataArray);
        md5Joint.position = positionVectorArray[0];
        md5Joint.orientation = jointMatrix[0];
    } else if (1 < matrixSet.size()) {
        throw new ColladaParseException("Found " + matrixSet.size() + " joint matrix sets for element " + jointNodeElement.id());
    // } else {
    // TODO: Might be translation, rotation pairs instead of a matrix
    // Or might be an unused joint node
    // throw new ColladaParseException("Found " + matrixSet.size() + " joint matrix sets for element " + jointNodeElement.id());
    }
    // boolean isJointNode;
    // String jointType = jointNodeElement.attr("type");
    // if ("JOINT".equals(jointType)) {
    // isJointNode = true;
    // } else if ("NODE".equals(jointType)) {
    // isJointNode = false;
    // } else {
    // throw new ColladaParseException("Found unknown node type of " + jointType + " for joint matrix sets" + errorLocation);
    // }
    md5Joint.element = jointNodeElement;
    md5Joint.name = jointNodeElement.id();
    md5Joint.childList = new ArrayList<>();
    return md5Joint;
}

Example 3 with Element

use of org.eaxy.Element in project Terasology by MovingBlocks.

the class ColladaLoader method parseSkeletalMeshData.

protected void parseSkeletalMeshData(Element rootElement) throws ColladaParseException {
    List<MD5Joint> md5JointList = new ArrayList<>();
    List<MD5Mesh> md5MeshList = new ArrayList<>();
    skeletonBuilder = new SkeletalMeshDataBuilder();
    // TODO: we need a better way to construct the parent/child nodes, especially for the non-joint nodes
    // MAYBE we can construct all of the nodes up-front, and then fill in the missing data for the ones of type JOINT later
    // And only keep the MD5 nodes in the final list if they are used?
    Map<String, MD5Joint> md5JointBySidMap = new HashMap<>();
    MD5Joint parentMD5Joint = null;
    ElementSet nodeParentSet = rootElement.find("library_visual_scenes", "visual_scene", "node");
    for (Element element : nodeParentSet) {
        createMd5JointForElementAndParent(md5JointBySidMap, element, parentMD5Joint);
    }
    ElementSet controllerSet = rootElement.find("library_controllers", "controller");
    for (Element controller : controllerSet) {
        ElementSet skinSet = controller.find("skin");
        if (1 != skinSet.size()) {
            throw new ColladaParseException("Found " + skinSet.size() + " skin sets for controller id=" + controller.id() + " name=" + controller.name());
        }
        Element skin = skinSet.first();
        ElementSet jointsSet = skin.find("joints");
        if (1 != jointsSet.size()) {
            throw new ColladaParseException("Found " + jointsSet.size() + " joints sets for controller id=" + controller.id() + " name=" + controller.name());
        }
        Element joints = jointsSet.first();
        ElementSet vertexWeightsSet = skin.find("vertex_weights");
        if (1 != vertexWeightsSet.size()) {
            throw new ColladaParseException("Found " + vertexWeightsSet.size() + " vertex weights sets for controller id=" + controller.id() + " name=" + controller.name());
        }
        Element vertexWeights = vertexWeightsSet.first();
        String vertexWeightsCountString = vertexWeights.attr("count");
        int vertexWeightsCount = Integer.parseInt(vertexWeightsCountString);
        String[] jointNameArray = null;
        float[] inverseBindMatrixArray;
        Quat4f[] rotationArray;
        ElementSet jointsInputSet = joints.find("input");
        List<Input> inputList = parseInputs(jointsInputSet);
        for (Input jointsInput : inputList) {
            if ("JOINT".equals(jointsInput.semantic)) {
                Element jointNameSourceElement = skin.select(jointsInput.sourceName);
                Source jointNameSource = parseSource(jointNameSourceElement);
                jointNameArray = jointNameSource.nameValues;
            }
            if ("INV_BIND_MATRIX".equals(jointsInput.semantic)) {
                Element jointMatrixSourceElement = skin.select(jointsInput.sourceName);
                Source jointMatrixSource = parseSource(jointMatrixSourceElement);
                inverseBindMatrixArray = jointMatrixSource.floatValues;
                rotationArray = quad4fArrayFromFloat16ArrayData(inverseBindMatrixArray);
            }
        }
        List<MD5Weight> md5WeightList = Lists.newArrayList();
        float[] weightsArray = null;
        ElementSet vertexWeightsInputSet = vertexWeights.find("input");
        List<Input> vertexWeightsInputList = parseInputs(vertexWeightsInputSet);
        // TODO: for now, assume the offsets will always perfectly match the sorted-by-offset list indexes
        Collections.sort(vertexWeightsInputList, (i1, i2) -> i1.offset - i2.offset);
        for (int i = 0; i < vertexWeightsInputList.size(); i++) {
            Input input = vertexWeightsInputList.get(i);
            if (input.offset != i) {
                throw new ColladaParseException("vertex weights input list offset does not match list index for vertex weights input " + input + " for controller id=" + controller.id() + " name=" + controller.name());
            }
        }
        for (Input vertexWeightsInput : vertexWeightsInputList) {
            // }
            if ("WEIGHT".equals(vertexWeightsInput.semantic)) {
                Element jointMatrixSourceElement = skin.select(vertexWeightsInput.sourceName);
                Source weightsArraySource = parseSource(jointMatrixSourceElement);
                weightsArray = weightsArraySource.floatValues;
            }
        }
        ElementSet vertexWeightsVCountDataSet = vertexWeights.find("vcount");
        if (1 != vertexWeightsVCountDataSet.size()) {
            throw new ColladaParseException("Found " + vertexWeightsVCountDataSet.size() + " vertex weights vcount sets for controller id=" + controller.id() + " name=" + controller.name());
        }
        Element vertexWeightsVCountData = vertexWeightsVCountDataSet.first();
        String vertexWeightsVCountString = vertexWeightsVCountData.text();
        String[] vertexWeightsVCountStrings = getItemsInString(vertexWeightsVCountString);
        if (vertexWeightsVCountStrings.length != vertexWeightsCount) {
            throw new ColladaParseException("Expected " + vertexWeightsCount + " but was " + vertexWeightsVCountStrings.length + " for controller id=" + controller.id() + " name=" + controller.name());
        }
        ElementSet vertexWeightsVDataSet = vertexWeights.find("v");
        if (1 != vertexWeightsVDataSet.size()) {
            throw new ColladaParseException("Found " + vertexWeightsVDataSet.size() + " vertex weights v sets for controller id=" + controller.id() + " name=" + controller.name());
        }
        Element vertexWeightsVData = vertexWeightsVDataSet.first();
        String vertexWeightsVDataString = vertexWeightsVData.text();
        String[] vertexWeightsVStrings = getItemsInString(vertexWeightsVDataString);
        // if (vertexWeightsVStrings.length != (vertexWeightsCount * vertexWeightsInputList.size())) {
        // throw new ColladaParseException("Expected " + vertexWeightsCount + " * input count of "
        // + vertexWeightsInputList.size() + " but was "
        // + vertexWeightsVStrings.length + " for controller id=" + controller.id() + " name=" + controller.name());
        // }
        // TODO: these aren't actually needed once we are populating MD5Weight records
        String[] vertexWeightsJointNameArray = new String[vertexWeightsCount];
        float[] vertexWeightsArray = new float[vertexWeightsCount];
        int vertexWeightsVDataIndex = -1;
        for (int vertexWeightsIndex = 0; vertexWeightsIndex < vertexWeightsCount; vertexWeightsIndex++) {
            MD5Weight md5Weight = new MD5Weight();
            Vector3f vertexPosition = new Vector3f();
            vertexPosition.x = vertices.get(3 * vertexWeightsIndex + 0);
            vertexPosition.y = vertices.get(3 * vertexWeightsIndex + 1);
            vertexPosition.z = vertices.get(3 * vertexWeightsIndex + 2);
            md5Weight.position = vertexPosition;
            md5WeightList.add(md5Weight);
            String vCountString = vertexWeightsVCountStrings[vertexWeightsIndex];
            int vCount = Integer.parseInt(vCountString);
            for (int vCountIndex = 0; vCountIndex < vCount; vCountIndex++) {
                for (Input vertexWeightsInput : vertexWeightsInputList) {
                    // vCount varies each time
                    ++vertexWeightsVDataIndex;
                    String indexString = vertexWeightsVStrings[vertexWeightsVDataIndex];
                    int index = Integer.parseInt(indexString);
                    if (-1 == index) {
                        throw new ColladaParseException("We do not support indexing into the bind shape yet");
                    }
                    if ("JOINT".equals(vertexWeightsInput.semantic)) {
                        md5Weight.jointIndex = index;
                        vertexWeightsJointNameArray[vertexWeightsIndex] = jointNameArray[index];
                    // logger.debug(String.valueOf(vertexWeightsVDataIndex) + ": " + "jointName=" + vertexWeightsJointNameArray[vertexWeightsIndex]);
                    } else if ("WEIGHT".equals(vertexWeightsInput.semantic)) {
                        md5Weight.bias = weightsArray[index];
                        vertexWeightsArray[vertexWeightsIndex] = weightsArray[index];
                    // logger.debug(String.valueOf(vertexWeightsVDataIndex) + ": " + "weight=" + vertexWeightsArray[vertexWeightsIndex]);
                    } else {
                        throw new ColladaParseException("Found unexpected vertex weights Input semantic " + vertexWeightsInput.semantic + " for controller id=" + controller.id() + " name=" + controller.name());
                    }
                }
            }
        }
        MD5Mesh md5Mesh = new MD5Mesh();
        md5Mesh.weightList = md5WeightList;
        // Find a node with sid="joint-name"
        for (String jointName : jointNameArray) {
            MD5Joint md5Joint = md5JointBySidMap.get(jointName);
            if (null == md5Joint) {
                throw new ColladaParseException("Cannot find joint node for node sid value for joint " + jointName + " in nodes for library_visual_scenes");
            }
            md5JointList.add(md5Joint);
        }
    }
    Deque<MD5Joint> jointsToProcess = new LinkedList<>(md5JointList);
    while (!jointsToProcess.isEmpty()) {
        MD5Joint joint = jointsToProcess.pop();
        MD5Joint parentJoint = joint.parent;
        if (null != parentJoint) {
            if (!md5JointList.contains(parentJoint)) {
                md5JointList.add(parentJoint);
                jointsToProcess.push(parentJoint);
            }
        }
    }
    for (MD5Joint joint : md5JointList) {
        if (null == joint.position) {
            throw new ColladaParseException("no joint position for joint with element id " + joint.element.id());
        }
        if (null == joint.orientation) {
            throw new ColladaParseException("no joint orientation for joint with element id " + joint.element.id());
        }
        // index argument is not used for anything currently, so we'll just set it to -1
        joint.bone = new Bone(-1, joint.name, joint.position, joint.orientation);
    }
    for (MD5Joint joint : md5JointList) {
        // We can probably skip unused end nodes
        joint.childList.stream().filter(childJoint -> childJoint.bone != null).forEach(childJoint -> joint.bone.addChild(childJoint.bone));
    }
    for (MD5Joint joint : md5JointList) {
        skeletonBuilder.addBone(joint.bone);
    }
    if (md5MeshList.size() > 0) {
        // TODO: Support multiple mesh somehow?
        MD5Mesh mesh = md5MeshList.get(0);
        for (MD5Weight weight : mesh.weightList) {
            skeletonBuilder.addWeight(new BoneWeight(weight.position, weight.bias, weight.jointIndex));
        }
        List<Vector2f> uvs = Lists.newArrayList();
        TIntList vertexStartWeight = new TIntArrayList(vertices.size() / 3);
        TIntList vertexWeightCount = new TIntArrayList(vertices.size() / 3);
        for (int i = 0; i < vertices.size() / 3; i++) {
            vertexStartWeight.add(i);
            vertexWeightCount.add(1);
        }
        skeletonBuilder.setVertexWeights(vertexStartWeight, vertexWeightCount);
        for (int i = 0; i < normals.size() / 2; i++) {
            uvs.add(new Vector2f(normals.get(i * 2 + 0), normals.get(i * 2 + 1)));
        }
        skeletonBuilder.setUvs(uvs);
        skeletonBuilder.setIndices(indices);
    }
// Now if you have come this far, you should be able to read the geometry data,
// as well as the skeleton and skinning data from COLLADA documents. And you should be able to draw
// the model in raw triangles, as well as draw the skeleton. Although I haven't discussed how you
// can accumulate the world matrices for each joint and then draw in world coordinates for debugging
// purposes but I think I gave a hint that we have to multiply parent joint's world matrix with current
// joint's Joint matrix and save the result in current joint's world matrix. We have to start this
// process from the root bone. So that we don't have dirty world matrices from parents, and the root
// Joint's world matrix becomes the Joint matrix, since root don't have any parent. If you are also
// reading the COLLADA specification version 1.5 you can find the skinning equation so you should also
// be able to put the model in bind shape. How can we animate this model is still not covered and will
// be covered in the following sections.
// THIS IS THE TARGET GOAL:
/*
        Bones
        - String name
        - int index
        - V3 object position
        - Quat4f obj rotation
        - parent / children bones

        SkeletalMesh


        // This part may not be required if we can implement SkeletalMeshData methods without it

        //////////////

        public SkeletalMeshData(List<Bone> bones, List<BoneWeight> weights,
           List<Vector2f> uvs,
           TIntList vertexStartWeights, TIntList vertexWeightCounts,
           TIntList indices) {

        BoneWeight
        Vector3f position = new Vector3f();
        float bias;
        int boneIndex;
        Vector3f normal = new Vector3f();

        //////////////


           public Collection<Bone> getBones();
           public Bone getRootBone();
           public Bone getBone(String name);

           public int getVertexCount();

           public List<Vector3f> getBindPoseVertexPositions();
           public List<Vector3f> getVertexPositions(List<Vector3f> bonePositions, List<Quat4f> boneRotations);

           public List<Vector3f> getBindPoseVertexNormals();
           public List<Vector3f> getVertexNormals(List<Vector3f> bonePositions, List<Quat4f> boneRotations);

           public TIntList getIndices();
           public List<Vector2f> getUVs();
         */
}

Example 4 with Element

use of org.eaxy.Element in project Terasology by MovingBlocks.

the class ColladaLoader method parseSkeletalMeshData.

public SkeletalMeshData parseSkeletalMeshData(InputStream inputStream) throws ColladaParseException, IOException {
    Document document = Xml.readAndClose(inputStream);
    Element rootElement = document.getRootElement();
    parseMeshData(rootElement);
    parseSkeletalMeshData(rootElement);
    return skeletonBuilder.build();
}

Example 5 with Element

use of org.eaxy.Element in project Terasology by MovingBlocks.

the class ColladaLoader method createMd5JointForElementAndParent.

private void createMd5JointForElementAndParent(Map<String, MD5Joint> md5JointBySidMap, Element element, MD5Joint parentMD5Joint) throws ColladaParseException {
    MD5Joint joint = createMD5Joint(element);
    joint.element = element;
    joint.parent = parentMD5Joint;
    if (null != parentMD5Joint) {
        parentMD5Joint.addChild(joint);
    }
    ElementSet elementChildSet = element.find("node");
    for (Element childElement : elementChildSet) {
        createMd5JointForElementAndParent(md5JointBySidMap, childElement, joint);
    }
    String sid = element.attr("sid");
    if (null != sid) {
        md5JointBySidMap.put(sid, joint);
    }
}