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package com.jme3.animation;
import com.jme3.export.InputCapsule;
import com.jme3.export.JmeExporter;
import com.jme3.export.JmeImporter;
import com.jme3.export.OutputCapsule;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector3f;
import com.jme3.scene.Spatial;
import com.jme3.util.TempVars;
import java.io.IOException;
import java.util.Arrays;
/**
* This class represents the track for spatial animation.
*
* @author Marcin Roguski (Kaelthas)
*/
public class SpatialTrack implements Track {
/**
* Translations of the track.
*/
private CompactVector3Array translations;
/**
* Rotations of the track.
*/
private CompactQuaternionArray rotations;
/**
* Scales of the track.
*/
private CompactVector3Array scales;
/**
* The times of the animations frames.
*/
private float[] times;
public SpatialTrack() {
}
/**
* Creates a spatial track for the given track data.
*
* @param times
* a float array with the time of each frame
* @param translations
* the translation of the bone for each frame
* @param rotations
* the rotation of the bone for each frame
* @param scales
* the scale of the bone for each frame
*/
public SpatialTrack(float[] times, Vector3f[] translations,
Quaternion[] rotations, Vector3f[] scales) {
setKeyframes(times, translations, rotations, scales);
}
/**
*
* Modify the spatial which this track modifies.
*
* @param time
* the current time of the animation
*/
public void setTime(float time, float weight, AnimControl control, AnimChannel channel, TempVars vars) {
Spatial spatial = control.getSpatial();
Vector3f tempV = vars.vect1;
Vector3f tempS = vars.vect2;
Quaternion tempQ = vars.quat1;
Vector3f tempV2 = vars.vect3;
Vector3f tempS2 = vars.vect4;
Quaternion tempQ2 = vars.quat2;
int lastFrame = times.length - 1;
if (time < 0 || lastFrame == 0) {
if (rotations != null)
rotations.get(0, tempQ);
if (translations != null)
translations.get(0, tempV);
if (scales != null) {
scales.get(0, tempS);
}
} else if (time >= times[lastFrame]) {
if (rotations != null)
rotations.get(lastFrame, tempQ);
if (translations != null)
translations.get(lastFrame, tempV);
if (scales != null) {
scales.get(lastFrame, tempS);
}
} else {
int startFrame = 0;
int endFrame = 1;
// use lastFrame so we never overflow the array
for (int i = 0; i < lastFrame && times[i] < time; ++i) {
startFrame = i;
endFrame = i + 1;
}
float blend = (time - times[startFrame]) / (times[endFrame] - times[startFrame]);
if (rotations != null)
rotations.get(startFrame, tempQ);
if (translations != null)
translations.get(startFrame, tempV);
if (scales != null) {
scales.get(startFrame, tempS);
}
if (rotations != null)
rotations.get(endFrame, tempQ2);
if (translations != null)
translations.get(endFrame, tempV2);
if (scales != null) {
scales.get(endFrame, tempS2);
}
tempQ.nlerp(tempQ2, blend);
tempV.interpolate(tempV2, blend);
tempS.interpolate(tempS2, blend);
}
if (translations != null)
spatial.setLocalTranslation(tempV);
if (rotations != null)
spatial.setLocalRotation(tempQ);
if (scales != null) {
spatial.setLocalScale(tempS);
}
}
/**
* Set the translations, rotations and scales for this track.
*
* @param times
* a float array with the time of each frame
* @param translations
* the translation of the bone for each frame
* @param rotations
* the rotation of the bone for each frame
* @param scales
* the scale of the bone for each frame
*/
public void setKeyframes(float[] times, Vector3f[] translations,
Quaternion[] rotations, Vector3f[] scales) {
if (times.length == 0) {
throw new RuntimeException("BoneTrack with no keyframes!");
}
this.times = times;
if (translations != null) {
assert times.length == translations.length;
this.translations = new CompactVector3Array();
this.translations.add(translations);
this.translations.freeze();
}
if (rotations != null) {
assert times.length == rotations.length;
this.rotations = new CompactQuaternionArray();
this.rotations.add(rotations);
this.rotations.freeze();
}
if (scales != null) {
assert times.length == scales.length;
this.scales = new CompactVector3Array();
this.scales.add(scales);
this.scales.freeze();
}
}
/**
* @return the array of rotations of this track
*/
public Quaternion[] getRotations() {
return rotations == null ? null : rotations.toObjectArray();
}
/**
* @return the array of scales for this track
*/
public Vector3f[] getScales() {
return scales == null ? null : scales.toObjectArray();
}
/**
* @return the arrays of time for this track
*/
public float[] getTimes() {
return times;
}
/**
* @return the array of translations of this track
*/
public Vector3f[] getTranslations() {
return translations == null ? null : translations.toObjectArray();
}
/**
* @return the length of the track
*/
public float getLength() {
return times == null ? 0 : times[times.length - 1] - times[0];
}
/**
* This method creates a clone of the current object.
* @return a clone of the current object
*/
@Override
public SpatialTrack clone() {
int tablesLength = times.length;
float[] timesCopy = this.times.clone();
Vector3f[] translationsCopy = this.getTranslations() == null ? null : Arrays.copyOf(this.getTranslations(), tablesLength);
Quaternion[] rotationsCopy = this.getRotations() == null ? null : Arrays.copyOf(this.getRotations(), tablesLength);
Vector3f[] scalesCopy = this.getScales() == null ? null : Arrays.copyOf(this.getScales(), tablesLength);
//need to use the constructor here because of the final fields used in this class
return new SpatialTrack(timesCopy, translationsCopy, rotationsCopy, scalesCopy);
}
@Override
public void write(JmeExporter ex) throws IOException {
OutputCapsule oc = ex.getCapsule(this);
oc.write(translations, "translations", null);
oc.write(rotations, "rotations", null);
oc.write(times, "times", null);
oc.write(scales, "scales", null);
}
@Override
public void read(JmeImporter im) throws IOException {
InputCapsule ic = im.getCapsule(this);
translations = (CompactVector3Array) ic.readSavable("translations", null);
rotations = (CompactQuaternionArray) ic.readSavable("rotations", null);
times = ic.readFloatArray("times", null);
scales = (CompactVector3Array) ic.readSavable("scales", null);
}
}
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