merging multiple camera projections

[Anonymous]

Hi All,

I’m running in to problems understanding the workflow for merging multiple camera projections on to 3D cards, where the cards are overlapping. At the moment, I have say, 3 different cards piped in to the same scene with some rotopaint work done on them to remove elements.

I have used masks with soft edges to blend the projections on to the original footage (which has been 3d tracked). If I want to keep those cards where they are but not have the chatter i’m getting where some of them are directly in the same 3d space, should I be merging one over the other? The reason I didn’t want to do this is I would see my script becoming large and a bit cumbersome. It made more sense to me to pipe everything in to one scene and try and figure out how to specify an order to which the cards are rendered from top to bottom.

I’m not sure if this makes sense – it’s really a layering thing I’m trying to figure out, specific to 3d cards and projections.

Can anyone help point me in the right direction? Here’s a screenie of my script with some labels. (Ignore the missing footage sequences, the drive the project referenced these is turned off!)

[esky11 esky111]

Hi judderman “Mergemat” can do this. Insert a “Mergemat” node and connect all the project3D nodes out into Mergemat. Add a card node and connect it with mergemat node…..

#! /usr/local/Nuke6.3v4/Nuke6.3 -nx
version 6.3 v4
define_window_layout_xml {

}
Root {
inputs 0
name /home/satheesh/Desktop/mergeCam_v01.nk
format “2048 1556 0 0 2048 1556 1 2K_Super_35(full-ap)”
proxy_type scale
proxy_format “1024 778 0 0 1024 778 1 1K_Super_35(full-ap)”
}
Camera2 {
inputs 0
focal 35
name Camera2
xpos 344
ypos -128
}
ColorBars {
inputs 0
name ColorBars1
xpos 148
ypos -311
}
Roto {
output alpha
premultiply rgb
curves {AnimTree: “” {
Version: 1.2
Flag: 0
RootNode: 1
Node: {
NodeName: “Root” {
Flag: 512
NodeType: 1
Transform: 0 0 S 0 0 S 0 0 S 0 0 S 0 1 S 0 1 S 0 0 S 0 1024 S 0 778
NumOfAttributes: 11
“vis” S 0 1 “opc” S 0 1 “mbo” S 0 1 “mb” S 0 1 “mbs” S 0 0.5 “fo” S 0 1 “fx” S 0 0 “fy” S 0 0 “ff” S 0 1 “ft” S 0 0 “pt” S 0 0
}
NumOfChildren: 1
Node: {
NodeName: “Ellipse1” {
Flag: 576
NodeType: 3
CurveGroup: “” {
Transform: 0 0 S 1 1 0 S 1 1 0 S 1 1 0 S 1 1 1 S 1 1 1 S 1 1 0 S 1 1 1615 S 1 1 690
Flag: 0
NumOfCubicCurves: 2
CubicCurve: “” {
Type: 0 Flag: 8192 Dim: 2
NumOfPoints: 12
0 S 1 1 -154.64 S 1 1 0 0 0 S 1 1 1615 S 1 1 330 0 0 S 1 1 154.64 S 1 1 0 0 0 S 1 1 0 S 1 1 -198.823 0 0 S 1 1 1895 S 1 1 690 0 0 S 1 1 0 S 1 1 198.823 0 0 S 1 1 154.64 S 1 1 0 0 0 S 1 1 1615 S 1 1 1050 0 0 S 1 1 -154.64 S 1 1 0 0 0 S 1 1 0 S 1 1 198.823 0 0 S 1 1 1335 S 1 1 690 0 0 S 1 1 0 S 1 1 -198.823 0
}
CubicCurve: “” {
Type: 0 Flag: 8192 Dim: 2
NumOfPoints: 12
0 S 1 1 -154.64 S 1 1 0 0 0 S 1 1 0 S 1 1 0 0 0 S 1 1 154.64 S 1 1 0 0 0 S 1 1 0 S 1 1 -198.823 0 0 S 1 1 0 S 1 1 0 0 0 S 1 1 0 S 1 1 198.823 0 0 S 1 1 154.64 S 1 1 0 0 0 S 1 1 0 S 1 1 0 0 0 S 1 1 -154.64 S 1 1 0 0 0 S 1 1 0 S 1 1 198.823 0 0 S 1 1 0 S 1 1 0 0 0 S 1 1 0 S 1 1 -198.823 0
}
NumOfAttributes: 44
“vis” S 0 1 “r” S 0 1 “g” S 0 1 “b” S 0 1 “a” S 0 1 “ro” S 0 0 “go” S 0 0 “bo” S 0 0 “ao” S 0 0 “opc” S 0 1 “bm” S 0 0 “inv” S 0 0 “mbo” S 0 0 “mb” S 0 1 “mbs” S 0 0.5 “mbsot” S 0 0 “mbso” S 0 0 “fo” S 0 1 “fx” S 0 0 “fy” S 0 0 “ff” S 0 1 “ft” S 0 0 “src” S 0 0 “stx” S 0 0 “sty” S 0 0 “str” S 0 0 “sr” S 0 0 “ssx” S 0 1 “ssy” S 0 1 “ss” S 0 0 “spx” S 0 0 “spy” S 0 0 “stot” S 0 0 “sto” S 0 0 “sv” S 0 0 “sf” S 0 1 “sb” S 0 1 “nv” S 0 1 “view1” S 0 1 “ltn” S 0 1 “ltm” S 0 1 “ltt” S 0 0 “tt” S 0 6 “pt” S 0 0
}
}
NumOfChildren: 0
}
}
}
}
toolbox {selectAll {
{ selectAll ssx 1 ssy 1 sf 1 }
{ createBezier ssx 1 ssy 1 sf 1 sb 1 tt 4 }
{ createBSpline ssx 1 ssy 1 sf 1 sb 1 }
{ createEllipse ssx 1 ssy 1 sf 1 sb 1 tt 6 }
{ createRectangle ssx 1 ssy 1 sf 1 sb 1 tt 7 }
{ brush ssx 1 ssy 1 sf 1 sb 1 }
{ eraser src 2 ssx 1 ssy 1 sf 1 sb 1 }
{ clone src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ reveal src 3 ssx 1 ssy 1 sf 1 sb 1 }
{ dodge src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ burn src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ blur src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ sharpen src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ smear src 1 ssx 1 ssy 1 sf 1 sb 1 }
} }
toolbar_brush_hardness 0.200000003
toolbar_lifetime_type all
toolbar_source_transform_scale {1 1}
toolbar_source_transform_center {320 240}
colorOverlay 0
lifetime_type “all frames”
motionblur_shutter_offset_type centred
source_black_outside true
createNewTrack {{-1} “-1t(none)t-1” “1000tNew Track Layert1000”}
name Roto2
xpos 148
ypos -210
}
Project3D {
inputs 2
name Project3D2
xpos 148
ypos -108
}
Camera2 {
inputs 0
name Camera1
xpos -185
ypos -139
}
CheckerBoard2 {
inputs 0
name CheckerBoard1
xpos -31
ypos -315
}
Roto {
output alpha
premultiply rgb
curves {AnimTree: “” {
Version: 1.2
Flag: 0
RootNode: 1
Node: {
NodeName: “Root” {
Flag: 512
NodeType: 1
Transform: 0 0 S 0 0 S 0 0 S 0 0 S 0 1 S 0 1 S 0 0 S 0 1024 S 0 778
NumOfAttributes: 11
“vis” S 0 1 “opc” S 0 1 “mbo” S 0 1 “mb” S 0 1 “mbs” S 0 0.5 “fo” S 0 1 “fx” S 0 0 “fy” S 0 0 “ff” S 0 1 “ft” S 0 0 “pt” S 0 0
}
NumOfChildren: 1
Node: {
NodeName: “Rectangle1” {
Flag: 576
NodeType: 3
CurveGroup: “” {
Transform: 0 0 S 1 1 0 S 1 1 0 S 1 1 0 S 1 1 1 S 1 1 1 S 1 1 0 S 1 1 412.5 S 1 1 715
Flag: 0
NumOfCubicCurves: 2
CubicCurve: “” {
Type: 0 Flag: 8192 Dim: 2
NumOfPoints: 12
1 S 1 1 0 S 1 1 -163.333 0 1 S 1 1 90 S 1 1 960 0 1 S 1 1 215 S 1 1 0 0 1 S 1 1 -215 S 1 1 0 0 1 S 1 1 735 S 1 1 960 0 1 S 1 1 0 S 1 1 -163.333 0 1 S 1 1 0 S 1 1 163.333 0 1 S 1 1 735 S 1 1 470 0 1 S 1 1 -215 S 1 1 0 0 1 S 1 1 215 S 1 1 0 0 1 S 1 1 90 S 1 1 470 0 1 S 1 1 0 S 1 1 163.333 0
}
CubicCurve: “” {
Type: 0 Flag: 8192 Dim: 2
NumOfPoints: 12
1 S 1 1 0 S 1 1 -163.333 0 1 S 1 1 0 S 1 1 0 0 1 S 1 1 215 S 1 1 0 0 1 S 1 1 -215 S 1 1 0 0 1 S 1 1 0 S 1 1 0 0 1 S 1 1 0 S 1 1 -163.333 0 1 S 1 1 0 S 1 1 163.333 0 1 S 1 1 0 S 1 1 0 0 1 S 1 1 -215 S 1 1 0 0 1 S 1 1 215 S 1 1 0 0 1 S 1 1 0 S 1 1 0 0 1 S 1 1 0 S 1 1 163.333 0
}
NumOfAttributes: 44
“vis” S 0 1 “r” S 0 1 “g” S 0 1 “b” S 0 1 “a” S 0 1 “ro” S 0 0 “go” S 0 0 “bo” S 0 0 “ao” S 0 0 “opc” S 0 1 “bm” S 0 0 “inv” S 0 0 “mbo” S 0 0 “mb” S 0 1 “mbs” S 0 0.5 “mbsot” S 0 0 “mbso” S 0 0 “fo” S 0 1 “fx” S 0 0 “fy” S 0 0 “ff” S 0 1 “ft” S 0 0 “src” S 0 0 “stx” S 0 0 “sty” S 0 0 “str” S 0 0 “sr” S 0 0 “ssx” S 0 1 “ssy” S 0 1 “ss” S 0 0 “spx” S 0 1024 “spy” S 0 778 “stot” S 0 0 “sto” S 0 0 “sv” S 0 0 “sf” S 0 1 “sb” S 0 1 “nv” S 0 1 “view1” S 0 1 “ltn” S 0 1 “ltm” S 0 1 “ltt” S 0 0 “tt” S 0 7 “pt” S 0 0
}
}
NumOfChildren: 0
}
}
}
}
toolbox {selectAll {
{ selectAll ssx 1 ssy 1 sf 1 }
{ createBezier ssx 1 ssy 1 sf 1 sb 1 tt 4 }
{ createBSpline ssx 1 ssy 1 sf 1 sb 1 }
{ createEllipse ssx 1 ssy 1 sf 1 sb 1 }
{ createRectangle ssx 1 ssy 1 sf 1 sb 1 tt 7 }
{ brush ssx 1 ssy 1 sf 1 sb 1 }
{ eraser src 2 ssx 1 ssy 1 sf 1 sb 1 }
{ clone src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ reveal src 3 ssx 1 ssy 1 sf 1 sb 1 }
{ dodge src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ burn src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ blur src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ sharpen src 1 ssx 1 ssy 1 sf 1 sb 1 }
{ smear src 1 ssx 1 ssy 1 sf 1 sb 1 }
} }
toolbar_brush_hardness 0.200000003
toolbar_lifetime_type all
toolbar_source_transform_scale {1 1}
toolbar_source_transform_center {320 240}
colorOverlay 0
lifetime_type “all frames”
motionblur_shutter_offset_type centred
source_black_outside true
createNewTrack {{-1} “-1t(none)t-1” “1000tNew Track Layert1000”}
name Roto1
xpos -31
ypos -218
}
Project3D {
inputs 2
name Project3D1
xpos -31
ypos -119
}
MergeMat {
inputs 2
name MergeMat1
xpos 38
ypos -2
}
Card2 {
translate {0 0 -2}
uniform_scale 1.3
control_points {3 3 3 6

1 {-0.5 -0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0 0 0}
1 {0 -0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0.5 0 0}
1 {0.5 -0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {1 0 0}
1 {-0.5 0 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0 0.5 0}
1 {0 0 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0.5 0.5 0}
1 {0.5 0 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {1 0.5 0}
1 {-0.5 0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0 1 0}
1 {0 0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0.5 1 0}
1 {0.5 0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {1 1 0} }
name Card1
xpos 38
ypos 70
}
Viewer {
frame 1
input_process false
name Viewer1
xpos 38
ypos 176
}

[Anonymous]

3D projection is a method of mapping points in three dimensions on a two dimensional plane. Like most current methods for displaying graphical data are based on planar two-dimensional media, the use of this type of projection is very common, especially in computer graphics, engineering and drafting.

[Author]

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