Here is the code proposed by Anto Patriarca, works like a charm :
import nuke
c = nuke.nodes.Cube()
sr = nuke.nodes.ScanlineRender()
cam = nuke.nodes.Camera()
c.setInput(0, nuke.toNode('CheckerBoard1'))
sr.setInput(1, c)
sr.setInput(2, cam)
cam.knob('useMatrix').setValue(True)
cam.knob('matrix').setAnimated()
for i in range(1, 101):
# recreate cube transformation
cube1Mat = nuke.toNode('Cube1').knob('matrix').getValue(time=i)
cubeM = nuke.math.Matrix4()
for j in range(16):
cubeM[j] = cube1Mat[j]
cubeM.transpose()
camera1Mat = nuke.toNode('Camera1').knob('matrix').getValue(time=i)
cameraM = nuke.math.Matrix4()
for j in range(16):
cameraM[j] = camera1Mat[j]
cameraM.transpose()
resMat = cubeM.inverse() * cameraM
resMat.transpose()
for j in range(16):
cam.knob('matrix').setValueAt(resMat[j], index=j, time=i)
On Thu, Sep 18, 2014 at 3:08 PM, Salvador <salva...@chez.com> wrote:
> Hi,
>
> I'm doing the previs of a shot where the camera follows a flying object
> that then lands. I'll then shoot the object on a gimbal with a camera on a
> technocrane. I'm trying to transpose the object and camera animation into a
> single camera animation but can't manage to do it.
>
> Here is a very basic script where the idea would be to create an animated
> camera that gives the same result without animating the object. I thought I
> could invert the Matrix but as soon as I try, I get 0 in the local Matrix.
> Any clue ?
>
> ---
> set cut_paste_input [stack 0]
> version 8.0 v6I have
> push $cut_paste_input
> Camera2 {
> translate {{curve x1 -2 s0 x100 -0 s0} {curve x1 -1 s0 x100 -0 s0} {curve
> x1 6 s0 x100 8 s0}}
> rotate {{curve x1 5 s0 x100 0 s0} {curve x1 -15 s0 x100 0 s0} {curve x1 0
> s0}}
> name Camera1
> selected true
> xpos -370
> ypos -102
> }
> CheckerBoard2 {
> inputs 0
> format "256 256 0 0 256 256 1 square_256"
> boxsize 32
> name CheckerBoard1
> selected true
> xpos -260
> ypos -321
> }
> Cube {
> rotate {{curve x1 30 s0 x100 60 s0} {curve x1 0 s0 x100 90 s0} 0}
> name Cube1
> selected true
> xpos -260
> ypos -190
> }
> push 0
> ScanlineRender {
> inputs 3
> motion_vectors_type distance
> name ScanlineRender1
> label "\[value projection_mode]"
> selected true
> xpos -260
> ypos -88
> }
> ---
>
>
> Salvador
>
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