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transformation cache
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@skrat
skrat committed Jun 30, 2009
1 parent 868d414 commit 80397ea
Showing 1 changed file with 53 additions and 49 deletions.
102 changes: 53 additions & 49 deletions src/org/sunflow/core/parser/DAEParser.java
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ public class DAEParser implements SceneParser {

private FastHashMap<String, FastHashMap<String, Integer>> geometryCache;
private FastHashMap<String, Integer> lightCache;
private FastHashMap<Element, Matrix4> nodeCache;
private FastHashMap<Node, Matrix4> transformCache;
private LinkedList<String> shaderCache;

private String actualSceneId; // TODO: handle multiple scenes
Expand Down Expand Up @@ -322,7 +322,7 @@ private void loadScene() {
geometryCache = new FastHashMap<String, FastHashMap<String ,Integer>>();
shaderCache = new LinkedList<String>();
lightCache = new FastHashMap<String, Integer>();
nodeCache = new FastHashMap<Element, Matrix4>();
transformCache = new FastHashMap<Node, Matrix4>();

try {
NodeList nodes = (NodeList) xpath.evaluate(getSceneQuery(actualSceneId)+"//node", dae, XPathConstants.NODESET);
Expand All @@ -332,7 +332,7 @@ private void loadScene() {
Element node = (Element) nodes.item(i);
String nodeId = node.getAttribute("id");
Matrix4 transformation = transform(node);
nodeCache.put(node, transformation);
transformCache.put(node, transformation);

for (Node childNode = node.getFirstChild(); childNode != null;) {
Node nextChild = childNode.getNextSibling();
Expand Down Expand Up @@ -715,61 +715,65 @@ private String getTexture(String effectId, Element param) {
}

private Matrix4 transform(Element node) {
LinkedList<LinkedList> transforms = new LinkedList<LinkedList>();

// collect transformations
for (; node != null && node.getTagName().equals("node"); node = (Element) node.getParentNode()) {

LinkedList<Matrix4> levelTransforms = new LinkedList<Matrix4>();
for (Node childNode = node.getFirstChild(); childNode!=null;) {
Node parentNode = node.getParentNode();
Matrix4 parent = null;
if ( transformCache.containsKey(parentNode) ) {
parent = (Matrix4) transformCache.get(parentNode);
} else {
if ( ! ((Element) parentNode).getTagName().equals("node") ) {
parent = Matrix4.IDENTITY;
} else {
parent = transform( (Element) parentNode );
transformCache.put(parentNode, parent);
}
}
Matrix4 result = Matrix4.IDENTITY;
result = result.multiply(parent);

Node nextChild = childNode.getNextSibling();
if (childNode.getNodeType() == Node.ELEMENT_NODE) {
Element child = (Element) childNode;
String tagname = child.getTagName();
LinkedList<Matrix4> nodeTransforms = new LinkedList<Matrix4>();
for (Node childNode = node.getFirstChild(); childNode!=null;) {

if (tagname.equals("scale")) {
Vector3 scale = parseVector(child.getTextContent());
levelTransforms.add( Matrix4.scale(scale.x,scale.y,scale.z) );

} else if (tagname.equals("translate")) {
Vector3 translation = parseVector(child.getTextContent());
levelTransforms.add( Matrix4.translation(translation.x,translation.y,translation.z) );

} else if(tagname.equals("rotate")) {
float[] floats = parseFloats(child.getTextContent());
if (floats[0] == 1.0) {
levelTransforms.add( Matrix4.rotateX((float) Math.toRadians(floats[3])) );
} else if (floats[1] == 1.0) {
levelTransforms.add( Matrix4.rotateY((float) Math.toRadians(floats[3])) );
} else if (floats[2] == 1.0) {
levelTransforms.add( Matrix4.rotateZ((float) Math.toRadians(floats[3])) );
}
Node nextChild = childNode.getNextSibling();
if (childNode.getNodeType() == Node.ELEMENT_NODE) {
Element child = (Element) childNode;
String tagname = child.getTagName();

} else if(tagname.equals("lookat")) {
float[] floats = parseFloats(child.getTextContent());
Point3 eye = new Point3(floats[0],floats[1],floats[2]);
Point3 target = new Point3(floats[3],floats[4],floats[5]);
Vector3 up = new Vector3(floats[6],floats[7],floats[8]);
levelTransforms.add( Matrix4.lookAt(eye, target, up) );
if (tagname.equals("scale")) {
Vector3 scale = parseVector(child.getTextContent());
nodeTransforms.add( Matrix4.scale(scale.x,scale.y,scale.z) );

} else if (tagname.equals("translate")) {
Vector3 translation = parseVector(child.getTextContent());
nodeTransforms.add( Matrix4.translation(translation.x,translation.y,translation.z) );

} else if(tagname.equals("rotate")) {
float[] floats = parseFloats(child.getTextContent());
if (floats[0] == 1.0) {
nodeTransforms.add( Matrix4.rotateX((float) Math.toRadians(floats[3])) );
} else if (floats[1] == 1.0) {
nodeTransforms.add( Matrix4.rotateY((float) Math.toRadians(floats[3])) );
} else if (floats[2] == 1.0) {
nodeTransforms.add( Matrix4.rotateZ((float) Math.toRadians(floats[3])) );
}

} else if(tagname.equals("lookat")) {
float[] floats = parseFloats(child.getTextContent());
Point3 eye = new Point3(floats[0],floats[1],floats[2]);
Point3 target = new Point3(floats[3],floats[4],floats[5]);
Vector3 up = new Vector3(floats[6],floats[7],floats[8]);
nodeTransforms.add( Matrix4.lookAt(eye, target, up) );
}
childNode = nextChild;
}
transforms.add(levelTransforms);
childNode = nextChild;
}


// iterate them from the end (topmost node)
Matrix4 m = Matrix4.IDENTITY;
for (int i = transforms.size()-1; i > -1; i--) {
ListIterator li = transforms.get(i).listIterator();
while( li.hasNext() ) {
Matrix4 t = (Matrix4) li.next();
m = m.multiply(t);
}
ListIterator li = nodeTransforms.listIterator();
while( li.hasNext() ) {
Matrix4 t = (Matrix4) li.next();
result = result.multiply(t);
}
return m;

return result;
}

private Color getBackgroundColor(String sceneId) {
Expand Down

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