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Where possible, merge meshes with identical attributes.

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git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@201 ed5b42cb-e716-0410-a449-f6a68f950b19
This commit is contained in:
Andrzej Kapolka
2007-04-18 21:06:08 +00:00
parent f7cb60407e
commit 488d47262b
2 changed files with 211 additions and 62 deletions
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src/java/com/threerings/jme/model/ModelMesh.java
+83 -2
View File
@@ -29,6 +29,7 @@ import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Properties;
import com.jme.bounding.BoundingBox;
@@ -141,6 +142,51 @@ public class ModelMesh extends TriMesh
Boolean.parseBoolean(tprops.getProperty("translucent"));
}
/**
* Returns an opaque object representing this mesh's attributes. The
* object will implement {@link Object#hashCode} and {@link Object#equals}
* so that meshes with the same attributes will have identical keys.
*/
public Object getAttributeKey ()
{
return new AttributeKey(_textureKey, _textures, _sphereMapped,
_filterMode, _mipMapMode, _emissiveMap, _emissive, _additive,
_solid, _transparent, _alphaThreshold, _translucent);
}
/**
* Merges another mesh into this one. The mesh is assumed to be in the same coordinate system
* and have the same attributes.
*/
public void merge (ModelMesh mesh)
{
TriangleBatch batch = (TriangleBatch)getBatch(0);
TriangleBatch mbatch = (TriangleBatch)mesh.getBatch(0);
int vcount = batch.getVertexCount();
batch.setVertexBuffer(concatenate(batch.getVertexBuffer(), mbatch.getVertexBuffer()));
batch.setNormalBuffer(concatenate(batch.getNormalBuffer(), mbatch.getNormalBuffer()));
if (batch.getColorBuffer() != null && mbatch.getColorBuffer() != null) {
batch.setColorBuffer(concatenate(batch.getColorBuffer(), mbatch.getColorBuffer()));
}
batch.setTextureBuffer(concatenate(
batch.getTextureBuffer(0), mbatch.getTextureBuffer(0)), 0);
for (int ii = 1, nn = getTextureCount(); ii < nn; ii++) {
batch.setTextureBuffer(batch.getTextureBuffer(0), ii);
}
IntBuffer ibuf = batch.getIndexBuffer(), mibuf = mbatch.getIndexBuffer();
IntBuffer nibuf = BufferUtils.createIntBuffer(ibuf.capacity() + mibuf.capacity());
ibuf.clear();
nibuf.put(ibuf);
mibuf.clear();
while (mibuf.hasRemaining()) {
nibuf.put(mibuf.get() + vcount);
}
nibuf.clear();
batch.setIndexBuffer(nibuf);
}
/**
* Adjusts the vertices and the transform of the mesh so that the mesh's
* position lies at the center of its bounding volume.
@@ -588,6 +634,20 @@ public class ModelMesh extends TriMesh
return astate;
}
/**
* Concatenates the two provided buffers.
*/
protected static FloatBuffer concatenate (FloatBuffer b1, FloatBuffer b2)
{
FloatBuffer nb = BufferUtils.createFloatBuffer(b1.capacity() + b2.capacity());
b1.clear();
nb.put(b1);
b2.clear();
nb.put(b2);
nb.clear();
return nb;
}
/**
* Sorts the encoded triangle index/distance pairs in {@link #_tcodes}
* using a two-pass (16 bit) radix sort (as described by
@@ -745,8 +805,29 @@ public class ModelMesh extends TriMesh
new RenderState[RenderState.RS_MAX_STATE];
}
/** The type of bounding volume that this mesh should use. */
protected int _boundingType;
/** A wrapper around an array of attributes that uses {@link Arrays#deepHashCode} and
* {@link Arrays#deepEquals} for hashing/comparison. */
protected static class AttributeKey
{
public AttributeKey (Object... attrs)
{
_attrs = attrs;
}
@Override // documentation inherited
public int hashCode ()
{
return Arrays.deepHashCode(_attrs);
}
@Override // documentation inherited
public boolean equals (Object other)
{
return Arrays.deepEquals(_attrs, ((AttributeKey)other)._attrs);
}
protected Object[] _attrs;
}
/** The name of the texture specified in the model file, which acts as a
* property key and a default value. */
src/java/com/threerings/jme/tools/ModelDef.java
+71 -3
View File
@@ -39,7 +39,9 @@ import java.util.Set;
import com.jme.bounding.BoundingBox;
import com.jme.bounding.BoundingSphere;
import com.jme.math.FastMath;
import com.jme.math.Vector3f;
import com.jme.scene.Spatial;
import com.jme.scene.batch.GeomBatch;
import com.jme.util.geom.BufferUtils;
import com.samskivert.util.PropertiesUtil;
@@ -51,6 +53,7 @@ import com.threerings.jme.model.ModelController;
import com.threerings.jme.model.ModelMesh;
import com.threerings.jme.model.ModelNode;
import com.threerings.jme.model.SkinMesh;
import com.threerings.jme.util.SpatialVisitor;
/**
* An intermediate representation for models used to store data parsed from
@@ -435,9 +438,6 @@ public class ModelDef
{
Model model = new Model(props.getProperty("name", "model"), props);
// set the overall scale
model.setLocalScale(Float.parseFloat(props.getProperty("scale", "1")));
// start by creating the spatials and mapping them to their names
for (int ii = 0, nn = spatials.size(); ii < nn; ii++) {
Spatial spatial = spatials.get(ii).getSpatial(props);
@@ -471,12 +471,21 @@ public class ModelDef
ModelController ctrl = createController(subProps, target);
if (ctrl != null) {
model.addController(ctrl);
referenced.add(target);
}
}
// in non-animated models, merge meshes with the same attributes
if (StringUtil.isBlank(props.getProperty("animations"))) {
mergeEquivalentMeshes(model, nodes, referenced);
}
// get rid of any nodes that serve no purpose
pruneUnusedNodes(model, nodes, referenced);
// set the overall scale
model.setLocalScale(Float.parseFloat(props.getProperty("scale", "1")));
return model;
}
@@ -517,6 +526,65 @@ public class ModelDef
return referenced.contains(node) || hasValidChildren;
}
/** Merges meshes with the same attributes. */
protected void mergeEquivalentMeshes (
Model model, HashMap<String, Spatial> nodes, final HashSet<Spatial> referenced)
{
final HashMap<Object, ArrayList<ModelMesh>> meshes =
new HashMap<Object, ArrayList<ModelMesh>>();
new SpatialVisitor<ModelMesh>(ModelMesh.class) {
public void traverse (Spatial spatial) {
// cut out when we encounter referenced nodes
if (!referenced.contains(spatial)) {
spatial.updateWorldVectors();
super.traverse(spatial);
}
}
protected void visit (ModelMesh mesh) {
// make sure we don't try this with skinned meshes
if (mesh instanceof SkinMesh) {
return;
}
Object key = mesh.getAttributeKey();
ArrayList<ModelMesh> list = meshes.get(key);
if (list == null) {
meshes.put(key, list = new ArrayList<ModelMesh>());
}
list.add(mesh);
}
}.traverse(model);
for (ArrayList<ModelMesh> list : meshes.values()) {
// the first in the list becomes the base
ModelMesh base = list.get(0);
flattenTransforms(base);
model.attachChild(base);
// the rest are merged with it
for (int ii = 1, nn = list.size(); ii < nn; ii++) {
ModelMesh mesh = list.get(ii);
flattenTransforms(mesh);
mesh.getParent().detachChild(mesh);
base.merge(mesh);
}
// update the model bound and recenter
base.updateModelBound();
base.centerVertices();
}
}
/** Transforms the mesh's vertices and normals into model coordinates. */
protected static void flattenTransforms (ModelMesh mesh)
{
GeomBatch batch = mesh.getBatch(0);
batch.getWorldCoords(batch.getVertexBuffer());
batch.getWorldNormals(batch.getNormalBuffer());
mesh.getLocalTranslation().zero();
mesh.getLocalRotation().loadIdentity();
mesh.getLocalScale().set(Vector3f.UNIT_XYZ);
}
/** Converts a boxed Integer list to an unboxed int array. */
protected static int[] toArray (ArrayList<Integer> list)
{