Slope_01

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Short description

Sort / Purpose: Interactive slope-label placement tool for linework in Civil 3D / AutoCAD. • Type of tool: Dialog-driven annotation command that creates MTEXT labels. • Scope: Works on picked point pairs or on every segment of selected LINE / LWPOLYLINE / POLYLINE entities. • Goal: Quickly place readable slope (and optional angle) labels with user-controlled format, prefixes/suffixes and scaling.

Command:

Command name: SLOPE_P Entry: Type slope_p in the command line and press Enter.

Description:

What this command does: Opens a “Slope Label” dialog where you define label style (slope format, angle format, text size, horizontal/vertical scale, prefixes/suffixes, units). After confirming, you choose between two workflows: • 2 Points mode: Repeatedly pick point pairs; each pair gets a slope (and optional angle) MTEXT label at the midpoint, offset above/below the segment. • Select Line/Segment mode: Select one or many LINE/LWPOLYLINE/POLYLINE entities; every individual segment gets a label.

Helper function: (if any)

Main helper functions used by c:slope_p: • PLTXT-MAKE-DCL – Builds the temporary DCL dialog definition file for the Slope Label UI. • SPU-ParseInt / SPU-GetLightingUnits / SPU-SetLightingUnits – Small utilities to read integers safely and sync dialog “Units / Lighting” with drawing variables. • SPU_UpdateAngEnable – Enables/disables the angle-format radio buttons when “Combine” is toggled. • SPU_SetUnits – Applies all unit-related settings (LUNITS, AUNITS, LIGHTINGUNITS, precisions) from the dialog to the drawing. • PLTXT-GetVertices / PLTXT-GetSegListFromEntity – Extract vertices and build per-segment (p0,p1) lists from LINE / LWPOLYLINE / POLYLINE entities. • PLTXT-READ-VALUES – Reads text height, H-scale, V-scale and all prefix/suffix strings from the dialog and stores them in globals. • PLTXT-AngToString – Converts an angle (radians) into formatted text according to the chosen angle format (deg, dms, grad, rad) and AUPREC. • PLTXT-SHOW-DIALOG – Drives the dialog lifecycle: initializes tiles from current globals, wires all actions, and returns OK/Cancel result. • PLTXT-CREATE-MTEXT – Core geometry/annotation engine: computes slope, text content, offset direction, and creates the MTEXT entity for one segment. • PLTXT-Loop-2Pts – Implements the “2 Points” picking loop and calls PLTXT-CREATE-MTEXT for each pair. • PLTXT-Loop-Ent – Implements the “Select Line/Segment” loop; for each selected entity it builds segment lists and calls PLTXT-CREATE-MTEXT on each.

Functionalities:

Key functionalities of slope_p: • Dual input modes: 2-point mode or entity-selection mode, switchable in the dialog. • Flexible slope formats: Percentage, per-mille, H:V ratio (x.xx:1), or V:H ratio (1:x.xx). • Optional angle label: Can show angle in Degrees, DMS, Grads, or Radians; may be combined on a second line under the slope. • Prefix / Suffix control: Independent prefix/suffix strings for slope and angle text (e.g., “S=” or “α=” etc.). • Scaling & offset: User-set text height, horizontal/vertical scale factors (to respect vertical exaggeration), and above/below toggle for label offset from the line. • Drawing units integration: Dialog can read and set LUNITS, AUNITS, LIGHTINGUNITS, and their precisions for consistent numeric formatting. • Segment-wise labeling: For polylines, every segment is processed individually with its own midpoint and orientation. • Robust checks: Skips zero-length segments, handles vertical slopes (INF) and guards against invalid numeric inputs.

Result:

Result / Output: • Geometry: One MTEXT entity per labeled segment (or per 2-point pair), placed at the segment midpoint, offset a fixed distance along the normal, rotated to match the segment angle. • Text content: Formatted slope string (with prefix/suffix) and, if enabled, a line break followed by the formatted angle string. • Visual style: Uses the current text style, current layer, and the user-selected text height & width factor for consistent appearance in the drawing. • User feedback: Command line messages confirm each created label and indicate when invalid or zero-length segments are skipped. Overall, running slope_p produces clear, customizable slope/angle MTEXT annotations along your design geometry with minimal repetitive work.

Images, animations etc.

Additional info:

Based on / Source code: Open Website

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