Feat: ROADMAP Phase 1-5 batch — trim/extend, plot scale, viewport UX, mline caps, table alignment

- TRIM/EXTEND: Ray and XLine entities supported as cutting boundaries and trim targets; trim results in Ray→Line/Ray, XLine→Ray/Ray or Line; hover preview added - Plot scale override: Fit/1:1/1:2/1:5/1:10/1:20/1:50/1:100/2:1 buttons added to Page Setup panel; PageSetupCommit applies scale to PlotSettings - Viewport UX: locked viewport gets orange border; selected viewport gets white border - Named view → viewport assignment: Choice dropdown in properties panel copies view_target/direction/height to the viewport entity - MLine caps: perpendicular start/end cap lines added for open (non-closed) MLines - Wipeout polygon grips: boundary vertices become editable grips when clipping_enabled+Polygonal; world→pixel back-projection on drag - Table cell alignment: CellStyle.alignment (1-9) drives left/center/right + top/middle/bottom text positioning; cxf::measure_text() helper added - New commands/features: DIMCONTINUE (DCO), DIMBASELINE (DBA), TOLERANCE (TOL), TABLE, ATTDEF, ATTEDIT, ATTDISP, BREAKATPOINT (BAP), PLOTWINDOW (PW), MLINE (ML); DIMSTYLE/DIMCURRENT/CLAYER/LTSCALE/CELTSCALE/SCALETEXT/XDATA/UCSICON/REGEN/DRAWORDER extended - PLINE arc mode: A/L/CLOSE text input, bulge computation, arc preview - Warning cleanup: removed unused imports and unreachable patterns Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-03 15:31:05 +03:00
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+// DIMBASELINE command — stacked baseline dimensions all measured from the same origin.
+//
+// Each new point becomes the second extension line origin of a new dimension.
+// The first extension line is always the same base origin point.
+// Each new dimension line is placed further from the baseline by DIMDLI (increment).
+//
+// Constructed from commands.rs after finding the last placed linear/aligned dimension.
+
+use acadrust::entities::{Dimension, DimensionLinear};
+use acadrust::types::Vector3;
+use acadrust::EntityType;
+use glam::Vec3;
+
+use crate::command::{CadCommand, CmdResult};
+use crate::scene::wire_model::WireModel;
+
+/// Default stacking increment (world units) between successive baseline dimensions.
+const DIMDLI: f32 = 1.5;
+
+pub struct DimBaselineCommand {
+    /// Fixed first-extension-line origin (never changes).
+    base_p1: Vec3,
+    /// Direction along the measurement direction (0.0 = horizontal, PI/2 = vertical).
+    rotation: f64,
+    /// Unit vector perpendicular to the dimension axis, pointing toward the dim line side.
+    perp: Vec3,
+    /// Perpendicular distance of the NEXT dimension line from the extension-line axis.
+    next_offset: f32,
+    /// True once we have a base dimension loaded.
+    ready: bool,
+}
+
+impl DimBaselineCommand {
+    /// No base dim found — cancel immediately.
+    pub fn new() -> Self {
+        Self {
+            base_p1: Vec3::ZERO,
+            rotation: 0.0,
+            perp: Vec3::Y,
+            next_offset: DIMDLI,
+            ready: false,
+        }
+    }
+
+    /// Build from the last placed dimension.
+    ///
+    /// `p1` — first extension line origin (fixed baseline).
+    /// `p2` — second extension line origin of the base dim (unused for placement, kept for context).
+    /// `definition_point` — dim-line position of the base dim (defines perpendicular side).
+    /// `rotation` — 0.0 = horizontal, PI/2 = vertical.
+    pub fn from_base(p1: Vec3, _p2: Vec3, definition_point: Vec3, rotation: f64) -> Self {
+        let axis = if rotation.abs() < 0.1 { Vec3::X } else { Vec3::Y };
+        let perp = Vec3::new(-axis.y, axis.x, 0.0);
+        let base_offset = (definition_point - p1).dot(perp);
+        // Next baseline dim goes one DIMDLI further from the baseline.
+        let next_offset = base_offset + DIMDLI;
+        Self {
+            base_p1: p1,
+            rotation,
+            perp,
+            next_offset,
+            ready: true,
+        }
+    }
+}
+
+impl CadCommand for DimBaselineCommand {
+    fn name(&self) -> &'static str { "DIMBASELINE" }
+
+    fn prompt(&self) -> String {
+        if !self.ready {
+            "DIMBASELINE  No base dimension found. Place a dimension first.".into()
+        } else {
+            "DIMBASELINE  Specify a second extension line origin (Enter to exit):".into()
+        }
+    }
+
+    fn on_point(&mut self, pt: Vec3) -> CmdResult {
+        if !self.ready {
+            return CmdResult::Cancel;
+        }
+        let p1 = self.base_p1;
+        let p2 = pt;
+
+        // Build a new linear dimension.
+        let mut dim = DimensionLinear::new(v3(p1), v3(p2));
+        dim.rotation = self.rotation;
+
+        let dim_line_pt = p1 + self.perp * self.next_offset;
+        let dim_line_pt2 = p2 + self.perp * self.next_offset;
+        dim.definition_point = v3(dim_line_pt);
+        dim.base.definition_point = v3(dim_line_pt);
+        dim.base.text_middle_point = v3((dim_line_pt + dim_line_pt2) * 0.5);
+        dim.base.insertion_point = dim.base.text_middle_point;
+        dim.base.actual_measurement = dim.measurement();
+
+        // Stack the next dim line further out.
+        self.next_offset += DIMDLI;
+
+        CmdResult::CommitEntity(EntityType::Dimension(Dimension::Linear(dim)))
+    }
+
+    fn on_enter(&mut self) -> CmdResult {
+        CmdResult::Cancel
+    }
+
+    fn on_mouse_move(&mut self, pt: Vec3) -> Option<WireModel> {
+        if !self.ready {
+            return None;
+        }
+        let p1 = self.base_p1;
+        let dim_line_pt = p1 + self.perp * self.next_offset;
+        let dim_line_pt2 = pt + self.perp * self.next_offset;
+        Some(WireModel {
+            name: "dimbase_preview".into(),
+            points: vec![
+                [p1.x, p1.y, p1.z], [dim_line_pt.x, dim_line_pt.y, dim_line_pt.z],
+                [f32::NAN, 0.0, 0.0],
+                [pt.x, pt.y, pt.z], [dim_line_pt2.x, dim_line_pt2.y, dim_line_pt2.z],
+                [f32::NAN, 0.0, 0.0],
+                [dim_line_pt.x, dim_line_pt.y, dim_line_pt.z],
+                [dim_line_pt2.x, dim_line_pt2.y, dim_line_pt2.z],
+            ],
+            color: WireModel::CYAN,
+            selected: false,
+            pattern_length: 0.0,
+            pattern: [0.0; 8],
+            line_weight_px: 1.0,
+            snap_pts: vec![],
+            tangent_geoms: vec![],
+            key_vertices: vec![],
+        })
+    }
+}
+
+fn v3(p: Vec3) -> Vector3 {
+    Vector3::new(p.x as f64, p.y as f64, p.z as f64)
+}