feat(v3.8): 2D projection views + section + DXF + dimensions + G2 curvature

2026-07-24 15:23:30 +00:00
parent 6779b45f27
commit d2c628215d
5 changed files with 446 additions and 0 deletions
@@ -0,0 +1,48 @@
+#pragma once
+#include "vde/brep/brep.h"
+#include "vde/core/point.h"
+#include <vector>
+#include <string>
+
+namespace vde::brep {
+
+/// 2D line segment for drawing output
+struct DrawSegment {
+    double x1, y1, x2, y2;
+    bool hidden = false;
+};
+
+/// Projection view of a B-Rep body
+struct ProjectionView {
+    std::string name;
+    std::vector<DrawSegment> segments;
+    std::vector<DrawSegment> hidden_lines;
+    double scale = 1.0;
+    
+    [[nodiscard]] size_t total_segments() const { return segments.size() + hidden_lines.size(); }
+};
+
+/// Generate orthographic projection views (front, top, right)
+[[nodiscard]] std::vector<ProjectionView> generate_views(const BrepModel& body);
+
+/// Generate a section view
+[[nodiscard]] ProjectionView section_view(const BrepModel& body,
+    const core::Point3D& point, const core::Vector3D& normal);
+
+/// Export to DXF R12 format
+bool export_dxf(const std::string& filepath, const std::vector<ProjectionView>& views);
+
+/// Dimension type
+enum class DimType { Linear, Radius, Diameter };
+
+/// A dimension annotation
+struct Dimension {
+    DimType type = DimType::Linear;
+    double x1 = 0, y1 = 0, x2 = 0, y2 = 0;
+    std::string text;
+};
+
+/// Auto-generate dimensions for a view
+[[nodiscard]] std::vector<Dimension> auto_dimension(const ProjectionView& view);
+
+} // namespace vde::brep