茂之钳
93852075dd
- offset_section_view(body, normal, offsets): combines section profiles at each offset - Step lines connect boundaries between adjacent planes - 4 new tests
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
#pragma once
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/**
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* @file brep_drawing.h
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* @brief Engineering drawing: 2D projection views + section + DXF export
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*
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* Orthographic projection views from B-Rep models with hidden-line
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* removal via mesh ray-casting. Supports section (cross-section) views
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* and AutoCAD R12 DXF format export.
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*
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* @ingroup brep
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*/
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#include "vde/brep/brep.h"
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#include "vde/core/point.h"
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#include <vector>
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#include <string>
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namespace vde::brep {
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/// 2D line segment for drawing output
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struct DrawSegment {
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double x1, y1, x2, y2;
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bool hidden = false; ///< true = dashed hidden line
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};
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/// Projection view of a B-Rep body
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struct ProjectionView {
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std::string name; ///< "front", "top", "right", "iso"
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std::vector<DrawSegment> segments; ///< visible lines
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std::vector<DrawSegment> hidden_lines; ///< dashed hidden lines
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double scale = 1.0;
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core::Point3D view_direction; ///< camera direction
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[[nodiscard]] size_t total_segments() const {
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return segments.size() + hidden_lines.size();
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}
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};
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/// Generate orthographic projection views
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/// @param body B-Rep model to project
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/// @return Vector of projection views (front, top, right, iso)
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[[nodiscard]] std::vector<ProjectionView> generate_views(const BrepModel& body);
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/// Generate a section view (cross-section)
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/// @param body Body to slice
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/// @param point Point on section plane
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/// @param normal Section plane normal
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/// @return Section view with cut edges and hatch lines
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[[nodiscard]] ProjectionView section_view(const BrepModel& body,
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const core::Point3D& point, const core::Vector3D& normal);
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/// Offset (stepped) section view — multiple parallel cutting planes
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/// Each offset defines a cutting plane at a different position along the normal
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/// direction. Results are merged with step lines at plane boundaries.
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/// @param body Body to slice
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/// @param normal Section direction (all planes share this normal)
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/// @param offsets Vector of plane positions (distance along normal from origin)
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/// @return Combined section view
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[[nodiscard]] ProjectionView offset_section_view(const BrepModel& body,
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const core::Vector3D& normal, const std::vector<double>& offsets);
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/// Export views to DXF format (R12 compatible)
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/// @param filepath Output file path (.dxf)
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/// @param views Vector of views to export
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/// @return true on success
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bool export_dxf(const std::string& filepath,
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const std::vector<ProjectionView>& views);
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} // namespace vde::brep
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