PointDetector

The node lets you detect input named points on another model faster, using geometry fitting, similar to BlendWrapping and auto-detecting points with a batch correspondenсes.

Input named points can be obtained using a SelectPoints node.

Two sets of named points can be combined into PointCorrespondences using a PointsToPointPairs node.

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Editor

PointDetector node has an editor that allows pinning and disabling input neutral points.

Within the editor, two models are represented side by side. You can synchronize views by checking Sync views in the node parameter panel.

In neutral geometry viewport (left)

LMB	selects points
CTRL + LMB	disables/enables points
SHIFT + LMB	unpins points

In target geometry viewport (right)

LMB on the mesh	pins the selected point
LMB on a point	selects it
click and drag a point	to move it
CTRL + LMB	disables points
SHIFT + LMB	unpins points
Hold SPACE	to show fitted mesh

Inputs

Neutral geometry

Geometry Geometry for neutral points

Target geometry

Geometry Target geometry to detect points on

Neutral Points

NamedPointsOnTriangle Neutral points for neutral geometry to be detected

Output

NamedPointsOnTriangle Detected points on a target geometry

Parameters

Auto-Compute:

if set, the node will be recomputed each time some parameter or input data is changed

Compute:

if Auto-Compute is off, starts detecting process

Accept:

accepts and pins all the detected points, prevents recomputing after all points but few were detected correctly

Reset:

resets fited vertices, pinned and extra points

Sync views:

if set, synchronize left and right viewports inside the editor

Points tab

Show Point Cycles:

if set, shows in visual editor colored for each input points’ names groups

Show Point Names:

if set, shows in visual editor point’s names

Filter:

category of points shown in a list below

All

all the points

Pinned

only points that have been pinned to target geometry

Fused

only points that are suspiciously topologically close to each other (usually detector mistakes)

Detector Parameters tab

Normal Radius (cm):

radius of computing normals for setting cameras while detecting

Camera Distance (cm):

camera’s distance away from the point on a geometry

Point Patch Resolution (px):

pixel size of a window in which each point will be detected

Feature Size (px):

pixel size of a point’s feature, which will be detected

Deformer Parameters tab

Show Patches:

if set, shows in visual editor currently used patches

Patches:

method of generating patches

From Polygroups

each neutral blendshape mesh polygroup is used as the initial patch

From Materials

each neutral blendshape material group is used as the initial patch

Generate by Sampling

initial patches with specified radius generated on mesh topologically

Polygroup Blur Iterations:

number of iterations while blurring initial patches

Patch Blur Weight (cm):

average adjacent weight on every iteration while blurring initial patches

Sample Radius (cm):

radius of samples, which become initial patches, generating by Generate by Sampling method

Deformer Data Paths tab

Show Free Polygons:

if set, shows in the visual editor current free polygons

Show Alignment Points:

if set, shows in the visual editor current alignment points

Neutral Reference:

file path to neutral blend

Blendshapes Reference:

file paths to all other blends

Free Polygon Selection:

path of file with free polygon selections, which are excluded from input mesh while fitting

Alignment Points:

path of file with alignment named points, which are used for rigid alignment blends

Save as Default:

save current Detector Parameters, Deformer Parameters and Deformer Data Paths parameters as default

Reset to Default:

set current node params to default

Reload:

reload Neutral Reference, Blendshapes Reference, Free Polygon Selection and Alignment Points files