Accurate construction and snaps

Take into account that the origin and coordinate axes X, Y, Z are arranged on 3D view in Renga as below:

The display of the origin depends on the selected measure mode.

When you draw, edit, or move objects constructed by two or more points, dynamic input fields appear. Each input field is displayed on a relevant extension line of an object during construction.

The values that can be set in the input fields, determine the measure mode.

For accurate 2D construction in Renga the following modes are used:

• Polar. The distance from the specified point and rotation angle relative to the X axis are measured. Polar is a default measure mode.
• Rectangular. The distance from the specified point on the X axis and Y axis are measured.

For accurate 3D construction in Renga the following modes are used:

• Cubic. The distance from the specified point along the X, Y, and Z axes are measured.
• Cylindrical. Measures distance from the specified point on XOY plane, an angle relative to the XOZ plane and distance from the specified point on the Z axis.
• Spherical. Measures an angle relative to the XOZ plane, an angle in vertical plane and distance from the specified point.

To change the measure mode when constructing or editing an object:

1. Right-click to open the context menu.
2. Select Measure mode.

To switch between input fields by using the TAB key.

After entering values in the dynamic input fields, object position needs to be fixed by left-clicking.

Example. Accurate construction of Arc by initial point, radius and an end point in the polar measure mode.

To specify an object point in a grid node:

1. Press the SHIFT button.
2. Left-click to fix the position when the point appears in the grid node.
   

When snapping to a grid, consider its settings:

When creating and editing objects in Renga the following object snaps work:

	point on the snap line;
	arc center point or circle center point;
	straight line midpoint or curved line midpoint;
	quadrant point on the circle;
	point of intersection of 2 or more lines, line and plane;
	tangent point for an arc or circle;
	perpendicular point;
	object end point;
	projections intersection point.

Left-click to fix an object in a snap point when a symbol appears.

When you work in the polar or rectangular measure mode, you can snap to an object if the object:

	has been constructed on the current level;
	touches the working plane.

When you work in cubic, cylindrical, or spherical construction modes, you can snap an object to any point on the visible edge of another object.

Use tracking snaps to construct an object:

• Parallel X axis;
• Parallel Y axis;
• Parallel to the Z axis (only in 3D measure modes);
• On the extension of the snap line of object to which the snap point belongs;
• Parallel to snap line of object to which the snap point belongs;
• Via the snap point, perpendicular to the snap line.

Snaps parallel to the X, Y and Z axis are activated automatically when constructing. When you edit the object, snap on its continuation is activated automatically.

To call a tracking snap from point:

1. Keep the mouse cursor on the object snap and the point will change color.
2. Use the mouse cursor to set the tracking direction.
3. For accurate placement of an object in relation to the selected object snap, enter the values in the dynamic input fields (see. Accurate Construction)

You may activate a snap point on the intersection of two tracking beams:

1. Successively hold the pointer onto the first point of the object's snap and then onto the second one to activate tracking snaps.

In this case, dynamic input fields are disabled.

2. Move the mouse cursor to the expected point of intersection of two beams constructed from these points. A new snap point will appear.
3. Click the left mouse button.

Similarly, you can get the projection intersection point. For example, to create a hole:

In order to deactivate a snap point without the construction interrupting, hold the pointer onto the snap point.