DLGRGradeCurve is similar to DLGRGrade however it takes an existing curve as an input. This is useful when designing grading on curved or organic forms.
Usage
Run command DLGRGradeCurve or click on the equivalent icon in the toolbar.
- Pick an existing curve
- Prompt: Pick Curve Start End : You are prompted to choose which end to be the start.
- You will now be prompted to choose the elevation (Z value) of the start. This may seem counter intuitive however it allows you to use planar drafting curves from a plan drawing.
You can either choose a point on your model with the mouse or enter a value manually in the command line.
- Prompt: Enter Grade You will be prompted to input a grade ration 1:? in the command line or alternatively you can pick a point in the model to grade to an arbitrary elevation (Z value).
Grade rations can be negative or positive numbers so: 20 will grade down from your start elevation at 1:20 to the end of your curve. -20 will grade up at 1:20 to the end of your curve.
When you move the mouse around the grade and relative elevation levels are displayed on the curve which can be a useful way of analysing your terrain.
Optional Parameters
After choosing your curve start elevation you can optionally provide the following parameters:
| Paramater | Type | Description |
|---|---|---|
| DeleteInput | Yes / No | Whether or not to keep or discard the source curve. |
| Width | yes / no | When width is >0 two curves will be generated offset from the centre line curve rather than one. This provides a quick way of generating a path through your existing topography. |
| GradeMode | Ration / Elevation | Methodology used to calculate the grade. |
| SetExistingSurface | Mesh surface | Specify a reference mesh from which to calculate batters. Typically this will be the existing survey grade geometry. |
| BatterGrade | Number 1:? Ratio | The grade of the batter (edge of the curve to the specified surface) |