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Copy to Points node: add Start/Stop Offset and Adaptive Spacing parameters

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This commit is contained in:
Keavon Chambers 2024-01-03 06:11:42 -08:00
parent 4c64df038f
commit ed82c5f20f
4 changed files with 42 additions and 9 deletions
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34
node-graph/gcore/src/vector/vector_nodes.rs
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@ -204,12 +204,15 @@ async fn copy_to_points<I: GraphicElementRendered + Default + ConcatElement + Tr
}
#[derive(Debug, Clone, Copy)]
pub struct ResamplePoints<Spacing> {
pub struct ResamplePoints<Spacing, StartOffset, StopOffset, AdaptiveSpacing> {
spacing: Spacing,
start_offset: StartOffset,
stop_offset: StopOffset,
adaptive_spacing: AdaptiveSpacing,
}
#[node_macro::node_fn(ResamplePoints)]
fn resample_points(mut vector_data: VectorData, spacing: f64) -> VectorData {
fn resample_points(mut vector_data: VectorData, spacing: f64, start_offset: f64, stop_offset: f64, adaptive_spacing: bool) -> VectorData {
for subpath in &mut vector_data.subpaths {
if subpath.is_empty() || spacing.is_zero() || !spacing.is_finite() {
continue;
@ -217,11 +220,30 @@ fn resample_points(mut vector_data: VectorData, spacing: f64) -> VectorData {
subpath.apply_transform(vector_data.transform);
let length = subpath.length(None);
let rounded_count = (length / spacing).round();
let used_length = length - start_offset - stop_offset;
if used_length <= 0. {
continue;
}
let used_length_without_remainder = used_length - used_length % spacing;
if rounded_count >= 1. {
let new_anchors = (0..=rounded_count as usize).map(|c| subpath.evaluate(SubpathTValue::GlobalEuclidean(c as f64 / rounded_count)));
*subpath = Subpath::from_anchors(new_anchors, subpath.closed() && rounded_count as usize > 1);
let count = if adaptive_spacing {
(used_length / spacing).round()
} else {
(used_length / spacing + f64::EPSILON).floor()
};
if count >= 1. {
let new_anchors = (0..=count as usize).map(|c| {
let ratio = c as f64 / count;
// With adaptive spacing, we widen or narrow the points (that's the rounding performed above) as necessary to ensure the last point is always at the end of the path
// Without adaptive spacing, we just evenly space the points at the exact specified spacing, usually falling short before the end of the path
let used_length_here = if adaptive_spacing { used_length } else { used_length_without_remainder };
let t = ratio * used_length_here + start_offset;
subpath.evaluate(SubpathTValue::GlobalEuclidean(t / length))
});
*subpath = Subpath::from_anchors(new_anchors, subpath.closed() && count as usize > 1);
}
subpath.apply_transform(vector_data.transform.inverse());