GPv3: Geometry Node support via the curve nodes #113602

New Issue

Dalai Felinto · 2023-10-12T14:51:58+02:00

Dalai Felinto commented

2023-10-12 14:51:58 +02:00

Work in progress

Waiting for review:

Join Geometry !113844

Missing

Apply Modifier (Falk)
Duplicate Elements (Falk)
Realize Instance (Falk) !113844
Viewer Node (Jacques)
Points and Curves attribute propagation on Instance on Points (Jacques)

Design discussion

Sample Curve
Sample Index

Working

Should not be ported:

Deform Curves on Surface
Handle Type Selection
Interpolate Curves
Set Handle Positions
Set Handle Type
Set Spline Type

Committed:

Blur Attribute d7fbd92ca7
Convex Hull dd8d3ec27b
Curve Fill 2d9ea10892
Curve Length da2877f401
Curve to Mesh 4a11755458
Curve to Points 1f680c3859 6853d787db
Curve Trim f88c2b6c46
Delete Geometry 47cfeb45d8 a89bb7632a
Domain Size c620b0b00e
Fillet Curve f54d5df2fc
Instance on Points 9453031730
Material Selection 42f71c9dca
Normal 7a73f792ed
Replace Material c5ed37a5c0
Resample Curve 3f13471d65 8e5f1e3d9f
Reverse Curve a93238a922
Separate Components 9e9fae7ec0
Separate Geometry 47cfeb45d8 a89bb7632a
Set Curve Normal 16b7977bb5
Set Curve Radius 87e03b3f97
Set Curve Tilt 493674435f
Set Material 9a967d26fd
Set Material Index e773cc2967
Set Position 3931a54e08
Set Spline Cyclic d3fea733a1
Set Spline Resolution a92cfc2754
Subdivide Curve 64f1ee14d8 8086293989
Transform Geometry 43a60ca38e

"Automatically" working 3931a54e08 e1fb095f0e :

Bounding Box 873453005d
Curve Handle Positions
Curve of Point
Curve Tangent
Curve Tilt
Endpoint Selection
Geometry to Instance
Is Spline Cyclic
Material Index
Offset Point in Curve
Points of Curve
Spline Length
Spline Parameter
Spline Resolution

Known Issues:

Radius has a scaled up factor which will affect any node that creates points from grease pencil. !113770
Crash/assert when going to edit mode with Resample curve - introduced by 49b21eba11.
Material socket only supports non-Grease Pencil materials.

Design topics

Layer as Instances

The nodes that convert from grease pencil to a new data type output instances. This way artists can easily reconstruct the layers preserving their original IDs, and with their attributes propagated as instance attributes. Those are:

Convex Hull
Curve to Mesh
Curve to Points
Fill Curve
Instance on Points

Note that the Bounding Box is considered a special case and it outputs a single mesh containing the entire geometry bounding box (with all layers combined).

Stacking Layers

The nodes that combine grease pencil objects, stack their layers together, one after the other (as opposed to merge them). Those are:

Join Geometry
Realize Instances

# Work in progress Waiting for review: * Join Geometry !113844 # Missing * Apply Modifier (Falk) * Duplicate Elements (Falk) * Realize Instance (Falk) !113844 * Viewer Node (Jacques) * Points and Curves attribute propagation on Instance on Points (Jacques) # Design discussion * Sample Curve * Sample Index # Working Should not be ported: * Deform Curves on Surface * Handle Type Selection * Interpolate Curves * Set Handle Positions * Set Handle Type * Set Spline Type Committed: * Blur Attribute d7fbd92ca73d * Convex Hull dd8d3ec27b70 * Curve Fill 2d9ea10892b2 * Curve Length da2877f40198 * Curve to Mesh 4a117554580f * Curve to Points 1f680c38592b 6853d787dbe4 * Curve Trim f88c2b6c460a * Delete Geometry 47cfeb45d854 a89bb7632afd * Domain Size c620b0b00eac * Fillet Curve f54d5df2fc84 * Instance on Points 94530317309 * Material Selection 42f71c9dcabe * Normal 7a73f792edad * Replace Material c5ed37a5c085 * Resample Curve 3f13471d65e9 8e5f1e3d9f4b9 * Reverse Curve a93238a9221a * Separate Components 9e9fae7ec0d4 * Separate Geometry 47cfeb45d854 a89bb7632afd * Set Curve Normal 16b7977bb559 * Set Curve Radius 87e03b3f97eb * Set Curve Tilt 493674435ff6 * Set Material 9a967d26fdbc * Set Material Index e773cc296777 * Set Position 3931a54e08b3 * Set Spline Cyclic d3fea733a1cd * Set Spline Resolution a92cfc2754f0 * Subdivide Curve 64f1ee14d8a1 8086293989e3 * Transform Geometry 43a60ca38ef9 "Automatically" working 3931a54e08b3 e1fb095f0e5e : * Bounding Box 873453005d15 * Curve Handle Positions * Curve of Point * Curve Tangent * Curve Tilt * Endpoint Selection * Geometry to Instance * Is Spline Cyclic * Material Index * Offset Point in Curve * Points of Curve * Spline Length * Spline Parameter * Spline Resolution Known Issues: * [x] Radius has a scaled up factor which will affect any node that creates points from grease pencil. !113770 * [x] Crash/assert when going to edit mode with Resample curve - introduced by 49b21eba11c2. * [x] Material socket only supports non-Grease Pencil materials. --- # Design topics ## Layer as Instances The nodes that convert from grease pencil to a new data type output instances. This way artists can easily reconstruct the layers preserving their original IDs, and with their attributes propagated as instance attributes. Those are: * Convex Hull * Curve to Mesh * Curve to Points * Fill Curve * Instance on Points Note that the Bounding Box is considered a special case and it outputs a single mesh containing the entire geometry bounding box (with all layers combined). ## Stacking Layers The nodes that combine grease pencil objects, stack their layers together, one after the other (as opposed to merge them). Those are: * Join Geometry * Realize Instances

greasepencil-nodes.blend

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GPv3: Geometry Node support via the curve nodes #113602