[Nuke-users] Mixing two cameras animation using local matrix

[Bruno-Pierre Jobin]

How would you guys mix animations from Camera 4 and Camera 5 into Camera 6? 
Putting Camera4.world_matrix+Camera5.world_matrix into local_matrix knob won’t 
work and I can understand why. But I’m having trouble figuring out what's the 
right expression.

Thank you



set cut_paste_input [stack 0]
version 10.0 v3
Camera2 {
inputs 0
translate {{curve x1021 50 x1041 150} {curve x1021 50 x1041 150} {curve x1021 
50 x1041 150}}
name Camera5
selected true
xpos -1715
ypos 6719
}
Camera2 {
inputs 0
useMatrix true
matrix {
    
{{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}}
    
{{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}}
    
{{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}}
    
{{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}
 
{Camera4.world_matrix((Camera4.world_matrix-Camera4.world_matrix)+Camera5.world_matrix)}}
  }
name Camera6
selected true
xpos -1763
ypos 6819
}
push $cut_paste_input
Camera2 {
translate {{curve i x1001 0 x1021 50} {curve i x1001 0 x1021 50} {curve i x1001 
0 x1021 50}}
name Camera4
selected true
xpos -1811
ypos 6716
}
Scene {
inputs 3
name Scene6
selected true
xpos -1942
ypos 6803
}_______________________________________________
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