Extended Ortho

In this Task 

• New lines will be drawn by projecting the points in an aligned plane from the sketch below.

Associated Tasks 

• Using the Project snap mode.

Before you Start 

• Activate the Extended Ortho snap mode and the Auxiliary lines. Right click onto the Snap tab at the base of the editor to do this.
• When the Snap and Geo tabs are grayed out, this indicates that the SNAP modes are temporarily deactivated.

Take Note 

• Frequently, the incidence of other snap modes may intrude upon the required snap mode. For example, both an intersection and a vertex snap modes may occupy the same position. Zoom in and position the cursor more accurately or disable the snap mode which is not required.
• The keyboard shortcut ‘J‘ can also be used to find the projected point.

Extended Ortho

Ribbon : Modes | Snaps | Extended Ortho

Default Menu : Modes | Snaps | Extended Ortho

Palette : Sketch | Snap Modes | Extended Ortho

Right click onto SNAP or GEO at the base of the editor | Geometric Aids | Extended Ortho

 

This snap mode is useful for drawing to a projected orthogonal point of geometry, such as a vertex, intersection etc.

Right click onto the Snap tab at the base of the editor and make sure the Intersection snap mode is activated.

Next, make sure the Geometric modes are activated, shown below.

In this task, the points shown by the pointers at the edges of the circles in the illustration below will be projected to the positions shown by the upper pointers.

Select the Line tool from the menu options above, then set another color on the Model layer to indicate different properties. Select a line style which will suitably represent a hidden linetype, shown below.

Target the intersection of the circle and the horizontal center line and pause until the extended ortho magnetic attraction lines are displayed, similar to the illustration below. DO NOT LEFT CLICK, simply pause until the projection lines are visible.

Move the cursor to the top sketch, aligning the cursor with the bottom left corner vertex and the intended projection point. When both vertical and horizontal projection lines are visible, left click to define the start of the new line, shown below.

Arrow indicates new line start point projected from sketch below

So that the new line can be drawn to the exact point at 90° to the top line, right click and select Local Snap > Projection from the local menu. Position the cursor on the top horizontal line and left click when the Projection snap mode marker is displayed, shown by the arrow below.

Arrow shows Projection snap mode from the local menu

The result is shown below.

Repeat this for the second line which is projected from the right edge of the circle, drawing the line from the projected point shown below left to the projection point

Project from the intersection of the circle and the center line	Project to the aligned vertex of bottom edge. Start line here.	Draw to the Projection point. Right click and select from local menu

The result is shown below.

Use the identical method to project the center and hidden lines from the object marked below.

When all lines are projected correctly, the result should be similar to the illustration below.

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Take Note 

Refer to the Video Animation for this task for detailed instructions.