public BckANK1(UInt32 size, Stream stream)
{
long secptr = stream.Position - 8;//section pointer
this.magic = "ANK1";
this.size = size;
hdr = Header.Read(stream); //get header
stream.Seek(secptr + hdr.jointanimationoffset, SeekOrigin.Begin); //go to the animations
for (int i = 0; i < hdr.jointanimationcount; i++)
{
jointanims.Add(JointAnimation.Read(stream)); //read animations
}
stream.Seek(secptr + hdr.scaleoffset, SeekOrigin.Begin); //go to the scales
for (int i = 0; i < hdr.scalecount; i++)
{
scales.Add(Data.ReadSingle(stream)); //read scales
}
stream.Seek(secptr + hdr.rotoffset, SeekOrigin.Begin); //go to rotations
for (int i = 0; i < hdr.rotcount; i++)
{
rotations.Add(Data.ReadInt16(stream)); //read rotations
}
stream.Seek(secptr + hdr.translationoffset, SeekOrigin.Begin); //go to translations
for (int i = 0; i < hdr.translationcount; i++)
{
translations.Add(Data.ReadSingle(stream)); //read translations
}
anglescale = (float)Math.Pow(2f, hdr.anglescaleexp) * (180f / 32767f); //some kind of float shenanigans
stream.Seek(secptr + this.size, SeekOrigin.Begin); //seek the next section
}
public static JointAnimation Read(Stream str)
{
JointAnimation anim = new JointAnimation();
anim.x = ComponentAnimation.Read(str);
anim.y = ComponentAnimation.Read(str);
anim.z = ComponentAnimation.Read(str);
return(anim);
}
static JointAnimation ImportAnimation(XmlNode xmlAnimation, Dictionary <string, Joint> joints)
{
XmlNodeList xmlChannels = xmlAnimation.SelectNodes("//channel");
List <JointAnimationChannel> channels = new List <JointAnimationChannel>();
foreach (XmlNode xmlChannel in xmlChannels)
{
// Target joint
string target = xmlChannel.Attributes["target"].Value;
string jointId = ExtractNodeIdFromTarget(target);
if (!joints.ContainsKey(jointId))
{
continue;
//throw new ApplicationException("Animated Joint '" + jointId + "' not found");
}
Joint joint = joints[jointId];
// Sampler
string samplerId = xmlChannel.Attributes["source"].Value.Substring(1);
XmlNode xmlSampler = xmlAnimation.SelectSingleNode("//sampler[@id='" + samplerId + "']");
if (xmlSampler == null)
{
throw new ApplicationException("Animation Sampler '" + samplerId + "' not found");
}
var sampler = ImportSampler(xmlAnimation, xmlSampler, target);
channels.Add(new JointAnimationChannel(sampler, joint));
}
JointAnimation animation = new JointAnimation(channels.ToArray());
if (xmlAnimation.Attributes["id"] != null)
{
animation.GlobalID = xmlAnimation.Attributes["id"].Value;
}
if (xmlAnimation.Attributes["name"] != null)
{
animation.Name = xmlAnimation.Attributes["name"].Value;
}
if (xmlAnimation.Attributes["sid"] != null)
{
animation.ScopedID = xmlAnimation.Attributes["sid"].Value;
}
return(animation);
}
/// <summary>
/// Takes a list of animations each having one channel with a distinct target
/// and creates a single animation of them by storing all channels of the
/// input animations in one resulting animation instance.
/// </summary>
/// <remarks>This is necessary because some DCC tools split one "real" animation
/// up into several animation tags in the collada file.</remarks>
/// <param name="animations">List of animations</param>
/// <returns>Merged Animation</returns>
static JointAnimation MergeAnimations(IEnumerable <JointAnimation> animations)
{
JointAnimation animation = null;
if ((from a in animations select a.Channels[0].Target).Distinct().Count() != animations.Count() ||
(from a in animations select a.Channels.Length).Max() > 1)
{
throw new Exception("Only animations with one channel each targetting distinct joints can be merged");
}
var channels = (from a in animations select a.Channels[0]).ToArray();
animation = new JointAnimation(channels);
return(animation);
}
/// <summary>
/// Takes a group of animations which affect the same joint and combines them into
/// one animation with one channel. For this all transformations of each individual
/// keyframe are combined. Translations are added, Scales multiplied and rotations
/// multiplied as well.
/// </summary>
/// <param name="animations">List of animations</param>
/// <returns>Combined animation</returns>
static JointAnimation CombineAnimations(IEnumerable <JointAnimation> animations)
{
if (animations.Count() == 1)
{
// If there is only one animation there's no need to join
return(animations.First());
}
// Number of frames that have to be combined
int numFrames = animations.First().NumFrames;
// All animations must have the same number of frames
if (!animations.All(a => a.NumFrames == numFrames))
{
throw new NotImplementedException("Animations affecting the same joint must " +
"have the same number of keyframes");
}
var combinedKeyframes = new JointAnimationKeyFrame[numFrames];
for (int i = 0; i < numFrames; i++)
{
// Create a combined key frame
float time = animations.First().Channels[0].Sampler.Keyframes[i].Time;
Vector3 scale = new Vector3(1, 1, 1);
Quaternion rotation = Quaternion.Identity;
Vector3 translation = new Vector3(0, 0, 0);
foreach (var add in animations.Select(anim => anim.Channels[0].Sampler.Keyframes[i]))
{
if (add.Scale != Vector3.One)
{
scale *= add.Scale;
}
if (add.Translation != Vector3.Zero)
{
translation += add.Translation;
}
// Single axis rotations are executed in order (as defined in the document)
// Note: Not sure if this is correct
if (add.Rotation != Quaternion.Identity)
{
rotation = add.Rotation * rotation;
}
}
var keyframe = new JointAnimationKeyFrame(time, scale, rotation, translation);
combinedKeyframes[i] = keyframe;
}
Joint target = animations.First().Channels[0].Target;
var sampler = new JointAnimationSampler(combinedKeyframes, AnimationInterpolation.Linear);
JointAnimation animation = new JointAnimation(new JointAnimationChannel[]
{
new JointAnimationChannel(sampler, target)
});
// Names
if (animations.Any(a => !String.IsNullOrEmpty(a.Name)))
{
animation.Name = animations.Where(a => !String.IsNullOrEmpty(a.Name)).
Select(a => a.Name).Aggregate((sum, name) => sum + "+" + name);
}
if (animations.Any(a => !String.IsNullOrEmpty(a.GlobalID)))
{
animation.GlobalID = animations.Where(a => !String.IsNullOrEmpty(a.GlobalID)).
Select(a => a.GlobalID).Aggregate((sum, name) => sum + "\n" + name);
}
return(animation);
}
/// <summary>
/// Takes a group of animations which affect the same joint and combines them into
/// one animation with one channel. For this all transformations of each individual
/// keyframe are combined. Translations are added, Scales multiplied and rotations
/// multiplied as well.
/// </summary>
/// <param name="animations">List of animations</param>
/// <returns>Combined animation</returns>
static JointAnimation CombineAnimations(IEnumerable<JointAnimation> animations)
{
if (animations.Count() == 1)
{
// If there is only one animation there's no need to join
return animations.First();
}
// Number of frames that have to be combined
int numFrames = animations.First().NumFrames;
// All animations must have the same number of frames
if(!animations.All(a => a.NumFrames == numFrames))
{
throw new NotImplementedException("Animations affecting the same joint must " +
"have the same number of keyframes");
}
var combinedKeyframes = new JointAnimationKeyFrame[numFrames];
for (int i = 0; i < numFrames; i++)
{
// Create a combined key frame
float time = animations.First().Channels[0].Sampler.Keyframes[i].Time;
Vector3 scale = new Vector3(1,1,1);
Quaternion rotation = Quaternion.Identity;
Vector3 translation = new Vector3(0,0,0);
foreach (var add in animations.Select(anim => anim.Channels[0].Sampler.Keyframes[i]))
{
if (add.Scale != Vector3.One)
scale *= add.Scale;
if (add.Translation != Vector3.Zero)
translation += add.Translation;
// Single axis rotations are executed in order (as defined in the document)
// Note: Not sure if this is correct
if (add.Rotation != Quaternion.Identity)
rotation = add.Rotation * rotation;
}
var keyframe = new JointAnimationKeyFrame(time, scale, rotation, translation);
combinedKeyframes[i] = keyframe;
}
Joint target = animations.First().Channels[0].Target;
var sampler = new JointAnimationSampler(combinedKeyframes, AnimationInterpolation.Linear);
JointAnimation animation = new JointAnimation(new JointAnimationChannel[]
{
new JointAnimationChannel(sampler, target)
});
// Names
if (animations.Any(a => !String.IsNullOrEmpty(a.Name)))
{
animation.Name = animations.Where(a => !String.IsNullOrEmpty(a.Name)).
Select(a => a.Name).Aggregate((sum, name) => sum + "+" + name);
}
if (animations.Any(a => !String.IsNullOrEmpty(a.GlobalID)))
{
animation.GlobalID = animations.Where(a => !String.IsNullOrEmpty(a.GlobalID)).
Select(a => a.GlobalID).Aggregate((sum, name) => sum + "\n" + name);
}
return animation;
}
/// <summary>
/// Takes a list of animations each having one channel with a distinct target
/// and creates a single animation of them by storing all channels of the
/// input animations in one resulting animation instance.
/// </summary>
/// <remarks>This is necessary because some DCC tools split one "real" animation
/// up into several animation tags in the collada file.</remarks>
/// <param name="animations">List of animations</param>
/// <returns>Merged Animation</returns>
static JointAnimation MergeAnimations(IEnumerable<JointAnimation> animations)
{
JointAnimation animation = null;
if ((from a in animations select a.Channels[0].Target).Distinct().Count() != animations.Count() ||
(from a in animations select a.Channels.Length).Max() > 1)
{
throw new Exception("Only animations with one channel each targetting distinct joints can be merged");
}
var channels = (from a in animations select a.Channels[0]).ToArray();
animation = new JointAnimation(channels);
return animation;
}
static JointAnimation ImportAnimation(XmlNode xmlAnimation, Dictionary<string,Joint> joints)
{
XmlNodeList xmlChannels = xmlAnimation.SelectNodes("//channel");
List<JointAnimationChannel> channels = new List<JointAnimationChannel>();
foreach (XmlNode xmlChannel in xmlChannels)
{
// Target joint
string target = xmlChannel.Attributes["target"].Value;
string jointId = ExtractNodeIdFromTarget(target);
if (!joints.ContainsKey(jointId))
{
continue;
//throw new ApplicationException("Animated Joint '" + jointId + "' not found");
}
Joint joint = joints[jointId];
// Sampler
string samplerId = xmlChannel.Attributes["source"].Value.Substring(1);
XmlNode xmlSampler = xmlAnimation.SelectSingleNode("//sampler[@id='" + samplerId + "']");
if (xmlSampler == null)
throw new ApplicationException("Animation Sampler '" + samplerId + "' not found");
var sampler = ImportSampler(xmlAnimation, xmlSampler, target);
channels.Add(new JointAnimationChannel(sampler, joint));
}
JointAnimation animation = new JointAnimation(channels.ToArray());
if (xmlAnimation.Attributes["id"] != null)
animation.GlobalID = xmlAnimation.Attributes["id"].Value;
if (xmlAnimation.Attributes["name"] != null)
animation.Name = xmlAnimation.Attributes["name"].Value;
if (xmlAnimation.Attributes["sid"] != null)
animation.ScopedID = xmlAnimation.Attributes["sid"].Value;
return animation;
}
