character animation using motion capture data

[sun.wenquan]

I am a new user of Unigine Engine. now I get a task of doing a character animation using motion capture data.

the  motion capture device is similar to the A.R.T system.

The data give me the position of bones of human body. I want to know how to apply this data to a objectmeshskinned model.

I got these mothods of class objectmeshskinned :

"void setBoneChildsTransform(int bone,const mat4 &transform) const;

void setFrameBoneTransform(int bone,const mat4 &transform) const;"

can change the shape of the model. but I do not know how to compute the right matrix ,especially the rotation matrix.

[maxi]

Hi sun.wenquan,

 

If you just need to change bones positions, you can get current bone transform matrix and change it's position like this:

vec3 new_bone_position;
mat4 t = skinned->getBoneTransform(num);
t.setTranslate(new_bone_position);
skinned->setBoneTransform(num, t);

But depending of your data, you may need to choose among these functions:

- setBoneTransform: sets bone's transform in local coordinates, relative to parent bone

- setWorldBoneTransform: sets bone's transform in global coordinates

- setBoneChildrenTransform / setWorldBoneChildrenTransform: sets transform for the current bone and updates all its children bones.