ok, let me clarify a few things. Each Bone has:
Parent - A pointer to its parent
length - (float) the length of the bone
Rotation/Position - (vector) The Rotation and Position
Direction - (vector) Bone's Direction
Transform - The Transformation Matrix
InverseBind - The Inverse of Transform in the reference pose
Start/End - The Start and End points of the bone
This is the code I use to move a Bone.
void bone::Set(){ //Calculate Bone's Relative Matrix Transform = matrix4(); //Set Transform to its Identity Transform.SetRotation( Rotation ); //If parent exist if(Parent!=NULL) //Combine Relative Matrix with Parent's Matrix to form Absolute Matrix Transform = Transform * Parent->Transform; //Calculate Bone's orientation vector3 tempVec = (Direction * length) * Transform; if(Parent!=NULL) Start = Parent->End; else Start = vector3(); End = Start + tempVec; }
The only translation I see here is the distance from
Start to
End, which is calculated in
tempVec. Are you saying I should combine this with the Transformation Matrix?
the second pic is the skeleton's right arm is in its default pose, where all its matrices are set to their identities.
since the blue point is at the edge, I assume its under the influence of just 1 bone. So I don't have to calculate the sum of the weights, I just calculate:
v'= TransformMatrix * ReferencePose^-1 * v
where:
v = (19.426800, 9.168850, 0.129585)
TransformMatrix = Identity Matrix
ReferencePose^-1 = the inverse matrix of 90 degrees in the z axis
And when I compute the result, I get v'=(9.168850, -19.426800, 0.129585)
As you can see in the second pic, that is not where v' should be.
Any ideas on what I'm doing wrong?
