New nodes: 'Reset Transform', 'Replace Transform', 'Count Points', 'Index Points' (#3420)

- Add the 'Reset Transform' and 'Replace Transform' nodes
- Add the 'Count Points' and 'Index Points' nodes
- Make the 'Index Elements' node support negative indexing from the end
- Make the 'Flatten Vector' node's implementation reusable
- Fix crash displaying 0x0 raster image in the Data panel
- Fix the 'Points to Polyline' node not working on two-point objects

editor/src/messages/portfolio/document/data_panel/data_panel_message_handler.rs

@@ -502,10 +502,17 @@ impl TableRowLayout for Raster<CPU> {
 		format!("Raster ({}x{})", self.width, self.height)
 	}
 	fn element_page(&self, _data: &mut LayoutData) -> Vec<LayoutGroup> {
-		let base64_string = self.data().base64_string.clone().unwrap_or_else(|| {
+		let raster = self.data();
+
+		if raster.width == 0 || raster.height == 0 {
+			let widgets = vec![TextLabel::new("Image has no area").widget_holder()];
+			return vec![LayoutGroup::Row { widgets }];
+		}
+
+		let base64_string = raster.base64_string.clone().unwrap_or_else(|| {
 			use base64::Engine;
 
-			let output = self.data().to_png();
+			let output = raster.to_png();
 			let preamble = "data:image/png;base64,";
 			let mut base64_string = String::with_capacity(preamble.len() + output.len() * 4);
 			base64_string.push_str(preamble);

editor/src/messages/portfolio/document/node_graph/node_properties.rs

@@ -154,6 +154,7 @@ pub(crate) fn property_from_type(
 				Some("PixelLength") => number_widget(default_info, number_input.min(min(0.)).unit(unit.unwrap_or(" px"))).into(),
 				Some("Length") => number_widget(default_info, number_input.min(min(0.))).into(),
 				Some("Fraction") => number_widget(default_info, number_input.mode_range().min(min(0.)).max(max(1.))).into(),
+				Some("SignedInteger") => number_widget(default_info, number_input.int()).into(),
 				Some("IntegerCount") => number_widget(default_info, number_input.int().min(min(1.))).into(),
 				Some("SeedValue") => number_widget(default_info, number_input.int().min(min(0.))).into(),
 				Some("PixelSize") => vec2_widget(default_info, "X", "Y", unit.unwrap_or(" px"), None, false),

node-graph/graph-craft/src/document.rs

@@ -848,7 +848,7 @@ impl NodeNetwork {
 						// If the input to self is a node, connect the corresponding output of the inner network to it
 						NodeInput::Node { node_id, output_index } => {
 							nested_node.populate_first_network_input(node_id, output_index, nested_input_index, node.original_location.inputs(*import_index), 1);
-							let input_node = self.nodes.get_mut(&node_id).unwrap_or_else(|| panic!("unable find input node {node_id:?}"));
+							let input_node = self.nodes.get_mut(&node_id).unwrap_or_else(|| panic!("Unable to find input node {node_id:?}"));
 							input_node.original_location.dependants[output_index].push(nested_node_id);
 						}
 						NodeInput::Import { import_index, .. } => {

node-graph/libraries/core-types/src/ops.rs

@@ -79,6 +79,8 @@ impl Convert<DVec2, ()> for DVec2 {
 	}
 }
 
+// TODO: Add a DVec2 to Table<Vector> anchor point conversion implementation to replace the 'Vec2 to Point' node
+
 /// Implements the [`Convert`] trait for conversion between the cartesian product of Rust's primitive numeric types.
 macro_rules! impl_convert {
 	($from:ty, $to:ty) => {

node-graph/libraries/graphic-types/src/graphic.rs

@@ -119,6 +119,55 @@ impl From<Table<GradientStops>> for Graphic {
 // Local trait to convert types to Table<Graphic> (avoids orphan rule issues)
 pub trait IntoGraphicTable {
 	fn into_graphic_table(self) -> Table<Graphic>;
+
+	/// Deeply flattens any vector content within a graphic table, discarding non-vector content, and returning a table of only vector elements.
+	fn into_flattened_vector_table(self) -> Table<Vector>
+	where
+		Self: std::marker::Sized,
+	{
+		let content = self.into_graphic_table();
+
+		// TODO: Avoid mutable reference, instead return a new Table<Graphic>?
+		fn flatten_table(output_vector_table: &mut Table<Vector>, current_graphic_table: Table<Graphic>) {
+			for current_graphic_row in current_graphic_table.iter() {
+				let current_graphic = current_graphic_row.element.clone();
+				let source_node_id = *current_graphic_row.source_node_id;
+
+				match current_graphic {
+					// If we're allowed to recurse, flatten any tables we encounter
+					Graphic::Graphic(mut current_graphic_table) => {
+						// Apply the parent graphic's transform to all child elements
+						for graphic in current_graphic_table.iter_mut() {
+							*graphic.transform = *current_graphic_row.transform * *graphic.transform;
+						}
+
+						flatten_table(output_vector_table, current_graphic_table);
+					}
+					// Push any leaf Vector elements we encounter
+					Graphic::Vector(vector_table) => {
+						for current_vector_row in vector_table.iter() {
+							output_vector_table.push(TableRow {
+								element: current_vector_row.element.clone(),
+								transform: *current_graphic_row.transform * *current_vector_row.transform,
+								alpha_blending: AlphaBlending {
+									blend_mode: current_vector_row.alpha_blending.blend_mode,
+									opacity: current_graphic_row.alpha_blending.opacity * current_vector_row.alpha_blending.opacity,
+									fill: current_vector_row.alpha_blending.fill,
+									clip: current_vector_row.alpha_blending.clip,
+								},
+								source_node_id,
+							});
+						}
+					}
+					_ => {}
+				}
+			}
+		}
+
+		let mut output = Table::new();
+		flatten_table(&mut output, content);
+		output
+	}
 }
 
 impl IntoGraphicTable for Table<Graphic> {
@@ -284,6 +333,7 @@ impl RenderComplexity for Graphic {
 pub trait AtIndex {
 	type Output;
 	fn at_index(&self, index: usize) -> Option<Self::Output>;
+	fn at_index_from_end(&self, index: usize) -> Option<Self::Output>;
 }
 impl<T: Clone> AtIndex for Vec<T> {
 	type Output = T;
@@ -291,6 +341,10 @@ impl<T: Clone> AtIndex for Vec<T> {
 	fn at_index(&self, index: usize) -> Option<Self::Output> {
 		self.get(index).cloned()
 	}
+
+	fn at_index_from_end(&self, index: usize) -> Option<Self::Output> {
+		if index == 0 || index > self.len() { None } else { self.get(self.len() - index).cloned() }
+	}
 }
 impl<T: Clone> AtIndex for Table<T> {
 	type Output = Table<T>;
@@ -304,6 +358,18 @@ impl<T: Clone> AtIndex for Table<T> {
 			None
 		}
 	}
+
+	fn at_index_from_end(&self, index: usize) -> Option<Self::Output> {
+		let mut result_table = Self::default();
+		if index == 0 || index > self.len() {
+			None
+		} else if let Some(row) = self.iter().nth(self.len() - index) {
+			result_table.push(row.into_cloned());
+			Some(result_table)
+		} else {
+			None
+		}
+	}
 }
 
 // TODO: Eventually remove this migration document upgrade code

node-graph/libraries/no-std-types/src/registry.rs

@@ -19,6 +19,8 @@ pub mod types {
 	pub type Length = f64;
 	/// 0 to 1
 	pub type Fraction = f64;
+	/// Signed integer that's actually a float because we don't handle type conversions very well yet
+	pub type SignedInteger = f64;
 	/// Unsigned integer
 	pub type IntegerCount = u32;
 	/// Unsigned integer to be used for random seeds

node-graph/nodes/graphic/src/graphic.rs

@@ -1,15 +1,11 @@
 use core_types::Color;
-use core_types::{
-	Ctx,
-	blending::AlphaBlending,
-	table::{Table, TableRow},
-	uuid::NodeId,
-};
+use core_types::Ctx;
+use core_types::registry::types::SignedInteger;
+use core_types::table::{Table, TableRow};
+use core_types::uuid::NodeId;
 use glam::{DAffine2, DVec2};
-use graphic_types::{
-	Artboard, Vector,
-	graphic::{Graphic, IntoGraphicTable},
-};
+use graphic_types::graphic::{Graphic, IntoGraphicTable};
+use graphic_types::{Artboard, Vector};
 use raster_types::{CPU, GPU, Raster};
 use vector_types::GradientStops;
 
@@ -164,48 +160,8 @@ pub async fn flatten_graphic(_: impl Ctx, content: Table<Graphic>, fully_flatten
 
 /// Converts a graphic table into a vector table by deeply flattening any vector content it contains, and discarding any non-vector content.
 #[node_macro::node(category("Vector"))]
-pub async fn flatten_vector(_: impl Ctx, content: Table<Graphic>) -> Table<Vector> {
-	// TODO: Avoid mutable reference, instead return a new Table<Graphic>?
-	fn flatten_table(output_vector_table: &mut Table<Vector>, current_graphic_table: Table<Graphic>) {
-		for current_graphic_row in current_graphic_table.iter() {
-			let current_graphic = current_graphic_row.element.clone();
-			let source_node_id = *current_graphic_row.source_node_id;
-
-			match current_graphic {
-				// If we're allowed to recurse, flatten any tables we encounter
-				Graphic::Graphic(mut current_graphic_table) => {
-					// Apply the parent graphic's transform to all child elements
-					for graphic in current_graphic_table.iter_mut() {
-						*graphic.transform = *current_graphic_row.transform * *graphic.transform;
-					}
-
-					flatten_table(output_vector_table, current_graphic_table);
-				}
-				// Push any leaf Vector elements we encounter
-				Graphic::Vector(vector_table) => {
-					for current_vector_row in vector_table.iter() {
-						output_vector_table.push(TableRow {
-							element: current_vector_row.element.clone(),
-							transform: *current_graphic_row.transform * *current_vector_row.transform,
-							alpha_blending: AlphaBlending {
-								blend_mode: current_vector_row.alpha_blending.blend_mode,
-								opacity: current_graphic_row.alpha_blending.opacity * current_vector_row.alpha_blending.opacity,
-								fill: current_vector_row.alpha_blending.fill,
-								clip: current_vector_row.alpha_blending.clip,
-							},
-							source_node_id,
-						});
-					}
-				}
-				_ => {}
-			}
-		}
-	}
-
-	let mut output = Table::new();
-	flatten_table(&mut output, content);
-
-	output
+pub async fn flatten_vector<I: IntoGraphicTable + 'n + Send + Clone>(_: impl Ctx, #[implementations(Table<Graphic>, Table<Vector>)] content: I) -> Table<Vector> {
+	content.into_flattened_vector_table()
 }
 
 /// Returns the value at the specified index in the collection.
@@ -229,11 +185,18 @@ pub fn index_elements<T: graphic_types::graphic::AtIndex + Clone + Default>(
 		Table<GradientStops>,
 	)]
 	collection: T,
-	/// The index of the item to retrieve, starting from 0 for the first item.
-	index: u32,
+	/// The index of the item to retrieve, starting from 0 for the first item. Negative indices count backwards from the end of the collection, starting from -1 for the last item.
+	index: SignedInteger,
 ) -> T::Output
 where
 	T::Output: Clone + Default,
 {
-	collection.at_index(index as usize).unwrap_or_default()
+	let index = index as i32;
+
+	if index < 0 {
+		collection.at_index_from_end(-index as usize)
+	} else {
+		collection.at_index(index as usize)
+	}
+	.unwrap_or_default()
 }

node-graph/nodes/transform/src/transform_nodes.rs

@@ -3,7 +3,7 @@ use core_types::color::Color;
 use core_types::table::Table;
 use core_types::transform::{ApplyTransform, Transform};
 use core_types::{CloneVarArgs, Context, Ctx, ExtractAll, InjectFootprint, ModifyFootprint, OwnedContextImpl};
-use glam::{DAffine2, DVec2};
+use glam::{DAffine2, DMat2, DVec2};
 use graphic_types::Graphic;
 use graphic_types::Vector;
 use graphic_types::raster_types::{CPU, GPU, Raster};
@@ -16,14 +16,14 @@ async fn transform<T: ApplyTransform + 'n + 'static>(
 	#[implementations(
 		Context -> DAffine2,
 		Context -> DVec2,
-		Context -> Table<Vector>,
 		Context -> Table<Graphic>,
+		Context -> Table<Vector>,
 		Context -> Table<Raster<CPU>>,
 		Context -> Table<Raster<GPU>>,
 		Context -> Table<Color>,
 		Context -> Table<GradientStops>,
 	)]
-	value: impl Node<Context<'static>, Output = T>,
+	content: impl Node<Context<'static>, Output = T>,
 	translation: DVec2,
 	rotation: f64,
 	scale: DVec2,
@@ -41,24 +41,75 @@ async fn transform<T: ApplyTransform + 'n + 'static>(
 		ctx = ctx.with_footprint(footprint);
 	}
 
-	let mut transform_target = value.eval(ctx.into_context()).await;
+	let mut transform_target = content.eval(ctx.into_context()).await;
 
 	transform_target.left_apply_transform(&matrix);
 
 	transform_target
 }
 
-/// Overwrites the transform of each element in the input table with the specified transform.
-#[node_macro::node(category(""))]
-fn replace_transform<Data, TransformInput: Transform>(
-	_: impl Ctx + InjectFootprint,
-	#[implementations(Table<Vector>, Table<Raster<CPU>>, Table<Graphic>, Table<Color>, Table<GradientStops>)] mut data: Table<Data>,
-	#[implementations(DAffine2)] transform: TransformInput,
-) -> Table<Data> {
-	for data_transform in data.iter_mut() {
-		*data_transform.transform = transform.transform();
+/// Resets the desired components of the input transform to their default values. If all components are reset, the output will be set to the identity transform.
+/// Shear is represented jointly by rotation and scale, so resetting both will also remove any shear.
+#[node_macro::node(category("Math: Transform"))]
+fn reset_transform<T>(
+	_: impl Ctx,
+	#[implementations(
+		Table<Graphic>,
+		Table<Vector>,
+		Table<Raster<CPU>>,
+		Table<Raster<GPU>>,
+		Table<Color>,
+		Table<GradientStops>,
+	)]
+	mut content: Table<T>,
+	#[default(true)] reset_translation: bool,
+	reset_rotation: bool,
+	reset_scale: bool,
+) -> Table<T> {
+	for row in content.iter_mut() {
+		// Translation
+		if reset_translation {
+			row.transform.translation = DVec2::ZERO;
 		}
-	data
+		// (Rotation, Scale)
+		match (reset_rotation, reset_scale) {
+			(true, true) => {
+				row.transform.matrix2 = DMat2::IDENTITY;
+			}
+			(true, false) => {
+				let scale = row.transform.decompose_scale();
+				row.transform.matrix2 = DMat2::from_diagonal(scale);
+			}
+			(false, true) => {
+				let rotation = row.transform.decompose_rotation();
+				let rotation_matrix = DMat2::from_angle(rotation);
+				row.transform.matrix2 = rotation_matrix;
+			}
+			(false, false) => {}
+		}
+	}
+	content
+}
+
+/// Overwrites the transform of each element in the input table with the specified transform.
+#[node_macro::node(category("Math: Transform"))]
+fn replace_transform<T>(
+	_: impl Ctx + InjectFootprint,
+	#[implementations(
+		Table<Graphic>,
+		Table<Vector>,
+		Table<Raster<CPU>>,
+		Table<Raster<GPU>>,
+		Table<Color>,
+		Table<GradientStops>,
+	)]
+	mut content: Table<T>,
+	transform: DAffine2,
+) -> Table<T> {
+	for row in content.iter_mut() {
+		*row.transform = transform.transform();
+	}
+	content
 }
 
 // TODO: Figure out how this node should behave once #2982 is implemented.
@@ -74,9 +125,9 @@ async fn extract_transform<T>(
 		Table<Color>,
 		Table<GradientStops>,
 	)]
-	vector: Table<T>,
+	content: Table<T>,
 ) -> DAffine2 {
-	vector.iter().next().map(|row| *row.transform).unwrap_or_default()
+	content.iter().next().map(|row| *row.transform).unwrap_or_default()
 }
 
 /// Produces the inverse of the input transform, which is the transform that undoes the effect of the original transform.

node-graph/nodes/vector/src/vector_nodes.rs

@@ -234,7 +234,7 @@ async fn repeat<I: 'n + Send + Clone>(
 	// TODO: When using a custom Properties panel layout in document_node_definitions.rs and this default is set, the widget weirdly doesn't show up in the Properties panel. Investigation is needed.
 	direction: PixelSize,
 	angle: Angle,
-	#[default(4)] count: IntegerCount,
+	#[default(5)] count: IntegerCount,
 ) -> Table<I> {
 	let angle = angle.to_radians();
 	let count = count.max(1);
@@ -825,6 +825,7 @@ async fn dimensions(_: impl Ctx, content: Table<Vector>) -> DVec2 {
 		.unwrap_or_default()
 }
 
+// TODO: Replace this node with an automatic type conversion implementation of the `Convert` trait
 /// Converts a vec2 value into a vector path composed of a single anchor point.
 ///
 /// This is useful in conjunction with nodes that repeat it, followed by the "Points to Polyline" node to string together a path of the points.
@@ -848,12 +849,12 @@ async fn points_to_polyline(_: impl Ctx, mut points: Table<Vector>, #[default(tr
 
 		let points_count = row.element.point_domain.ids().len();
 
-		if points_count > 2 {
+		if points_count >= 2 {
 			(0..points_count - 1).for_each(|i| {
 				segment_domain.push(next_id.next_id(), i, i + 1, BezierHandles::Linear, StrokeId::generate());
 			});
 
-			if closed {
+			if closed && points_count != 2 {
 				segment_domain.push(next_id.next_id(), points_count - 1, 0, BezierHandles::Linear, StrokeId::generate());
 
 				row.element
@@ -2007,9 +2008,47 @@ async fn count_elements<I: Count>(
 		Vec<f64>,
 		Vec<DVec2>,
 	)]
-	source: I,
+	content: I,
 ) -> f64 {
-	source.count() as f64
+	content.count() as f64
+}
+
+#[node_macro::node(category("Vector: Measure"), path(graphene_core::vector))]
+async fn count_points(_: impl Ctx, content: Table<Vector>) -> f64 {
+	content.into_iter().map(|row| row.element.point_domain.positions().len() as f64).sum()
+}
+
+/// Retrieves the vec2 position (in local space) of the anchor point at the specified index in table of vector elements.
+/// If no value exists at that index, the position (0, 0) is returned.
+#[node_macro::node(category("Vector"), path(graphene_core::vector))]
+async fn index_points(
+	_: impl Ctx,
+	/// The vector element or elements containing the anchor points to be retrieved.
+	content: Table<Vector>,
+	/// The index of the points to retrieve, starting from 0 for the first point. Negative indices count backwards from the end, starting from -1 for the last item.
+	index: f64,
+) -> DVec2 {
+	let points_count = content.iter().map(|row| row.element.point_domain.positions().len()).sum::<usize>();
+
+	// Clamp and allow negative indexing from the end
+	let index = index as isize;
+	let index = if index < 0 {
+		(points_count as isize + index).max(0) as usize
+	} else {
+		(index as usize).min(points_count - 1)
+	};
+
+	// Find the point at the given index across all vector elements
+	let mut accumulated = 0;
+	for row in content.iter() {
+		let row_point_count = row.element.point_domain.positions().len();
+		if index - accumulated < row_point_count {
+			return row.element.point_domain.positions()[index - accumulated];
+		}
+		accumulated += row_point_count;
+	}
+
+	DVec2::ZERO
 }
 
 #[node_macro::node(category("Vector: Measure"), path(core_types::vector))]