JP2912132B2 - Dimension line entry method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dimension line writing method for writing three-dimensional dimensions in three-dimensional CAD or the like.

[0002]

2. Description of the Related Art Conventional three-dimensional dimension lines are disclosed in
As described in detail in the specification of Japanese Patent No. 4568, a semi-automatic method is used as an entry method so that an accurate dimension line can be entered and displayed in three dimensions even when projected from any line of sight. I have.

That is, a plane to be uniquely determined is calculated from the relationship between elements selected from the outside, and a dimension line is generated on the plane using the distance between the endpoints of the selected element as a dimension value. For example, when two parallel lines are selected as elements, the distance between the two lines is set as a dimension value, and a dimension line is generated on a plane formed by the two lines by extending each line. In this case, a method is used in which plane data specified by the user is used only when a plane is not uniquely determined from the selected element.

[0004]

The above-described conventional three-dimensional dimension line writing method has a drawback that if a plane is uniquely determined from a selected element, the user cannot write in an arbitrary position. In addition, when the position of the line of sight is changed and the object is rotated by 180 degrees, there is a disadvantage that the line of sight changes the dimension value, and it is not possible to appropriately cope with the change of the line of sight.

[0005]

The present invention SUMMARY OF] is Oite the dimension line programming method when dimensioning the three-dimensional graphic, elements and the said three-dimensional graphic to be dimension line <br/> fill An input unit for inputting information about a plane for dimension line entry, a set value changing unit for setting and changing various entry conditions for a predefined dimension line type, and the dimension line generated from the input element Identification means for identifying the type and dimension line entry position; shape creation means for creating shape data of the dimension line to be entered from the identified type and entry position information of the dimension line and the entry conditions; Registration means for registering shape data of dimension lines in a database; display means for displaying the registered dimension lines on the three-dimensional figure in a form corresponding to a viewpoint on a screen; and the displayed dimension lines Characterized in that it is constituted from the editing means for performing predetermined editing the shape data of the dimensional values of the dimension line registered in accordance with the rotation request or inverted request for dimension.

[0006]

Next, the present invention will be described with reference to the drawings.

[Structure] As shown in FIG. 1, in the dimension line writing method of the present invention, an input means 1-1 for designating a target element and a position to be generated, and a dimension line defined in advance. Setting value changing means 1-2 for changing various writing conditions relating to the shape; identifying means 1-3 for identifying the type and position of a dimension line to be generated from the element designated by the input means 1-1; Shape creating means 1-4 for creating shape data of a dimension line from the result of 1-3 and the data of entry conditions
A registration unit 1-5 for registering the shape data created by the shape creation unit 1-4 in the database; and a display unit 1 for displaying the dimension line registered by the registration unit 1-5 on the screen in a form according to the viewpoint. -6, input means 1-1 to registration means 1-5
The editing unit 1-7 edits the dimension line generated up to the above in response to a request such as rotation or inversion.

[Functions of Each Part] Input means 1-1: Allows a user to specify an element to be a dimension line. Specify 1 as the radius / diameter dimension line
One element designation for two elements (Fig. 2, 2-1) and two element designation with the distance between the two elements as the dimension value (Fig. 2, 2-2)
There is.

The position where the three-dimensional dimension line is generated is an arbitrary plane in the space. By uniquely determining the plane, the same shape as the two-dimensional dimension line can be created. Therefore, the plane to be generated can be input together with the element designation (FIGS. 2, 2-3). The plane to be generated is basically a coordinate plane or a plane parallel thereto. However, any position can be specified, and the same plane as the dimension line generated before can be specified. Also, in the one-element specification 2-1 or the two-element specification 2-2, when a plane is uniquely determined from an element, the plane is set as a default value (FIGS. 2, 2-4). For example, this is the case of specifying a circle or two lines.

When a plane is designated by the plane designation 2-3, it is necessary to determine the direction in which the dimension line is to be generated next, so that the direction is designated (FIG. 2, 2-5). It is the same as the concept of horizontal / vertical in two dimensions. However, because the plane is three-dimensional, the plane is designated as a local coordinate and specified by a coordinate axis.

Set value changing means 1-2: Change initial information necessary for determining a shape of a dimension line prepared in advance in a batch or interactive manner.

Identification means 1-3: Determines and determines the type of the dimension line from the element specified by one element specification 2-1 or two element specification 2-2. The default value (2-4) of the plane to be generated at the same time is also determined.

Shape creating means 1-4: from the dimension line type determined by the identifying means 1-3, the plane designated by the input means 1-1, and the entry condition data set by the set value changing means 1-2. The shape of the dimension line is created, and the dimension value faces the front with respect to the viewing direction. FIG. 3 shows an example of the shape of the created dimension line.

Registration means 1-5: The shape data of the dimension line created by the shape creation means 1-4 is registered in a database.
At this time, since the shape of the dimension line is composed of a plurality of lines, they are registered so that they can be treated as an aggregate.

Display means 1-6: The dimension lines registered in the database by the registration means 1-5 are displayed on the screen according to the designated line of sight. At this time, the dimension value and the arrow are displayed in a fixed size regardless of the size of the three-dimensional shape.

Editing means: 1-7 The dimension line created by the shape creating means 1-4 has a dimension value facing up with respect to the line of sight. However, when the line of sight is changed, the display state of the three-dimensional shape is changed, and the display state of the dimension line is also changed. Therefore, when a reversal instruction for reversing the dimension value turned down is input, the dimension value turned down is changed to face up (FIG. 4A). In this case, there are individual designation and collective designation as the designation method of the dimension line. In the collective designation, not all the dimension values are reversed but only the face-down dimension values are to be reversed.

Further, when a dimension value rotation instruction is input, the dimension value is rotated so as to face the figure side or the outside (FIG. 4B). [Operation] A dimension line is input using the three-dimensional shape of FIG. 5A as an example.

The following input is made by the input means 1-1.
The line 5-1 and the line 5-3 are designated as elements. A plane for generating a dimension line (a plane parallel to the ZX coordinate plane) is determined by the two lines. Here, it is assumed that XY coordinates are generated on the plane. Therefore, the XY coordinate plane is designated by the plane designation 2-3. The direction of the dimension line at that time is the X coordinate axis.
Next, in the identification means 1-3, a parallel dimension line expressing the distance between the two lines is selected from the state of the two lines input by the input means 1-1. Next, the shape creating means 1-4 creates the shape of the parallel dimension line (three lines and a line describing the comment dimension value with an arrow indicating a range) on the XY coordinate plane, At -5, the shape is registered in the database. The registered data is displayed on the screen by the display unit 1-6. The displayed result is the dimension line 5-6 in FIG.

As a second example, input of a dimension line representing the distance between a circle (center point) and a line is shown. Yen 5-
Specify 2 and line 5-3. As in the first example, the plane for generating the dimension line is determined when the circle is designated.
In order to generate on the same plane as (6) (including a parallel plane), the dimension line 5-6 is specified in the plane specification 2-3. Identification means 1
With -3, a parallel dimension line expressing the distance from the center point of the circle to the line is selected. The subsequent operation is the same as in the first example. The displayed result is the dimension line 5-7 in FIG. 5 (b).

As a third example, the input of a dimension line representing the radius of a circle is shown. A circle 5-5 is designated by the input means 1-1.
Since the plane to be generated is determined at the time when the circle 5-5 which is the one-element specification 2-1 is specified, a dimension line is generated on the plane on the circle by the generation 2-4 using the default value. The identification means 1-3 selects a radius dimension line. The shape creating means 1-4 creates a shape of a radius dimension line on the plane of the circle. For subsequent operations, 1
Same as the example. The displayed result is dimension line 5-8.

Finally, the operation of the editing means 1-7 will be described. When it is desired to arrange the dimension value of the dimension line 5-9 in FIG. 5B on the graphic side, a target dimension line is designated and a dimension value rotation instruction is input. Rotate 180 degrees around the line representing the dimension value. The result is the dimension line 6-1 in FIG. Also, if you change the line of sight after entering the dimension line,
As shown in FIG. 7A, the dimension value is directed to the back side. When a dimension value inversion instruction is input by batch designation in order to invert those dimension values so as to face the front side, the comment is inverted at the same position. FIG. 7B shows the result.

[0022]

As described above, the present invention has an effect that a user can write a dimension line at an arbitrary position when writing a dimension line for a three-dimensional shape. There is an effect that a defect of the dimension value display due to the change of the size can be easily and appropriately corrected.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a diagram showing a processing procedure of an input unit in FIG.

FIG. 3 is a diagram showing a specific display example of a dimension line according to the present invention.

FIG. 4 is an explanatory diagram of inversion and rotation of a dimension value in the embodiment.

FIG. 5 is a diagram showing a specific example of dimension value entry in the present embodiment.

FIG. 6 is a diagram showing a specific example of dimension value rotation in the present embodiment.

FIG. 7 is a diagram showing a specific example of dimension value inversion in the present embodiment.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-72278 (JP, A) JP-A-63-136174 (JP, A) JP-A-5-134729 (JP, A) JP-A-3- 105473 (JP, A) JP-A-2-254568 (JP, A) JP-A-2-150975 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 17/50

Claims (1)

(57) [Claims] 1. A Oite the dimension line programming method when dimensioning the three-dimensional graphic, information about the elements and the plane of the dimension lines of the three-dimensional figure to be filled dimension line <br/> Input means for inputting, a set value changing means for setting and changing various entry conditions relating to a predefined dimension line type, and identifying the dimension line type and dimension line entry position generated from the input element. Identifying means for creating, shape creating means for creating shape data of the dimension line to be entered from the type and entry position information of the identified dimension line and the entry conditions, and storing the created shape data of the dimension line in a database. A registration unit for registering, a display unit for displaying the registered dimension line on the three-dimensional figure in a form corresponding to a viewpoint on a screen, and a rotation request for a dimension value of the displayed dimension line. Dimension line programming method, characterized in that it is constructed from the editing means for performing predetermined editing the shape data of the dimensional values of the dimension line registered in response to the inversion request.