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Formated LodControl before fixing a cloning issue

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git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10739 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
This commit is contained in:
rem..om 2013-07-28 19:21:13 +00:00
parent a33c7394e3
commit b61192d71e
1 changed files with 41 additions and 38 deletions

49
engine/src/core/com/jme3/scene/control/LodControl.java

@ -47,14 +47,14 @@ import java.io.IOException;
/**
* Determines what Level of Detail a spatial should be, based on how many pixels
* on the screen the spatial is taking up. The more pixels covered, the more detailed
* the spatial should be.
* It calculates the area of the screen that the spatial covers by using its bounding box.
* When initializing, it will ask the spatial for how many triangles it has for each LOD.
* It then uses that, along with the trisPerPixel value to determine what LOD it should be at.
* It requires the camera to do this.
* The controlRender method is called each frame and will update the spatial's LOD
* if the camera has moved by a specified amount.
* on the screen the spatial is taking up. The more pixels covered, the more
* detailed the spatial should be. It calculates the area of the screen that the
* spatial covers by using its bounding box. When initializing, it will ask the
* spatial for how many triangles it has for each LOD. It then uses that, along
* with the trisPerPixel value to determine what LOD it should be at. It
* requires the camera to do this. The controlRender method is called each frame
* and will update the spatial's LOD if the camera has moved by a specified
* amount.
*/
public class LodControl extends AbstractControl implements Cloneable {
@ -66,7 +66,8 @@ public class LodControl extends AbstractControl implements Cloneable {
private int[] numTris;
/**
* Creates a new <code>LodControl</code>.
* Creates a new
* <code>LodControl</code>.
*/
public LodControl() {
}
@ -83,9 +84,9 @@ public class LodControl extends AbstractControl implements Cloneable {
}
/**
* Specifies the distance tolerance for changing the LOD level on the geometry.
* The LOD level will only get changed if the geometry has moved this
* distance beyond the current LOD level.
* Specifies the distance tolerance for changing the LOD level on the
* geometry. The LOD level will only get changed if the geometry has moved
* this distance beyond the current LOD level.
*
* @param distTolerance distance tolerance for changing LOD
*/
@ -105,10 +106,10 @@ public class LodControl extends AbstractControl implements Cloneable {
}
/**
* Sets the triangles per pixel value.
* The <code>LodControl</code> will use this value as an error metric
* to determine which LOD level to use based on the geometry's
* area on the screen.
* Sets the triangles per pixel value. The
* <code>LodControl</code> will use this value as an error metric to
* determine which LOD level to use based on the geometry's area on the
* screen.
*
* @param trisPerPixel triangles per pixel
*/
@ -118,18 +119,21 @@ public class LodControl extends AbstractControl implements Cloneable {
@Override
public void setSpatial(Spatial spatial) {
if (!(spatial instanceof Geometry))
if (!(spatial instanceof Geometry)) {
throw new IllegalArgumentException("LodControl can only be attached to Geometry!");
}
super.setSpatial(spatial);
Geometry geom = (Geometry) spatial;
Mesh mesh = geom.getMesh();
numLevels = mesh.getNumLodLevels();
numTris = new int[numLevels];
for (int i = numLevels - 1; i >= 0; i--)
for (int i = numLevels - 1; i >= 0; i--) {
numTris[i] = mesh.getTriangleCount(i);
}
}
@Override
public Control cloneForSpatial(Spatial spatial) {
try {
LodControl clone = (LodControl) super.clone();
@ -155,13 +159,13 @@ public class LodControl extends AbstractControl implements Cloneable {
float newDistance = bv.distanceTo(vp.getCamera().getLocation()) / ratio;
int level;
if (Math.abs(newDistance - lastDistance) <= distTolerance)
if (Math.abs(newDistance - lastDistance) <= distTolerance) {
level = lastLevel; // we haven't moved relative to the model, send the old measurement back.
else if (lastDistance > newDistance && lastLevel == 0)
} else if (lastDistance > newDistance && lastLevel == 0) {
level = lastLevel; // we're already at the lowest setting and we just got closer to the model, no need to keep trying.
else if (lastDistance < newDistance && lastLevel == numLevels - 1)
} else if (lastDistance < newDistance && lastLevel == numLevels - 1) {
level = lastLevel; // we're already at the highest setting and we just got further from the model, no need to keep trying.
else{
} else {
lastDistance = newDistance;
// estimate area of polygon via bounding volume
@ -199,5 +203,4 @@ public class LodControl extends AbstractControl implements Cloneable {
numLevels = ic.readInt("numLevels", 0);
numTris = ic.readIntArray("numTris", null);
}
}