JP2002132842A - Method for synthesizing building data and periphery data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for synthesizing building data and periphery data which can use prepared data on three-dimensional shapes in peripheral environment of a building for a walk-through by putting them together with three-dimensional shape data on the building itself. SOLUTION: After the three-dimensional shape data on the ground and the existent building present on the ground are registered on a server computer and the three-dimensional shape data of the building are generated on a client computer, three-dimensional shape data representing the periphery of a place where the building is scheduled to be constructed are read out of the server computer through a transmission medium, and put together with the three- dimensional shape data on the client computer and displayed, thereby synthesizing the building data and periphery data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of creating three-dimensional shape data of a building such as a house using a personal computer or the like, and converting the three-dimensional shape data representing the terrain around the building or an existing building to the Internet. The present invention relates to a method of synthesizing building data and peripheral data to be synthesized by being obtained from a server computer via the like.

[0002]

2. Description of the Related Art Conventionally, at the time of building a house, a building company creates three-dimensional shape data of a house to be built by a customer using a workstation, and moves or moves a viewpoint set for the three-dimensional shape data. By stopping,
CG for the same scene as walking around each part of the house
(Computer Graphics) A so-called walk-through in which an image is depicted as a moving image or a still image in an animation format is performed.

[0003] In recent years, although there is a limitation in the depiction ability even in a personal computer of a general household, basically, a home in a moving image format similar to the above is basically created based on the creation of three-dimensional shape data representing a home. The software which can describe each part of is provided.

[0004]

However, in the walk-through using a personal computer or the like, each part of the house itself can usually be described by a CG image. The depiction was not done. In order to describe the surrounding environment, it is necessary to create the three-dimensional shape data, but it is extremely complicated.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention combines three-dimensional shape data of a surrounding environment of a building prepared in advance with three-dimensional shape data of the building itself and uses it for a walk-through or the like. It is an object of the present invention to provide a method of synthesizing building data and surrounding data that can be performed.

Therefore, according to the method of synthesizing building data and surrounding data according to claim 1 of the present invention, the three-dimensional shape data of the terrain and the existing building existing on the terrain is registered in the server computer, and the data is registered on the client computer. After creating the three-dimensional shape data of the building, the three-dimensional shape data representing the vicinity of the planned construction site of the building is read from the server computer via the transmission medium, and the client computer combines and displays the three-dimensional shape data of the building. It is characterized by doing so. Here, the “construction” includes an outdoor artificial structure such as a road or a garden in addition to a building.

According to a second aspect of the present invention, in the method of the first aspect, the three-dimensional shape data of the building created on the client computer is transmitted to a server computer via a transmission medium. It is characterized in that it is registered after being synthesized with the surrounding data of the building.

According to a third aspect of the present invention, there is provided a computer-readable recording medium storing a program for causing a server computer and a client computer to execute the method according to the first or second aspect.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, in the method of synthesizing building data and peripheral data in the present embodiment, a client computer 1 such as a personal computer prepared by a user at home or the like and a server computer 2 owned by a building company are required. Transmission media 3 such as public telephone lines
Use while connecting via the Internet using.
Although a single client computer 1 is shown in the figure, a large number of client computers 1 are actually
Can be connected to the same server computer 2 to carry out the method of the present invention.

Each of the client computer 1 and the server computer 2 includes input units 1a and 2a each including an input device such as a keyboard and a mouse, output units 1b and 2b each including an appropriate display device and a printing device, and an arithmetic unit. 1c, 2c
And control units 1d and 2d, and storage units 1e and 2e including a nonvolatile large-capacity storage device such as a hard disk and a volatile storage device such as a RAM (Random Access Memory). As is well known, the calculation units 1c and 2c, the control unit 1d,
A part of the storage unit 2d and the storage units 1e and 2e may be integrally configured as a CPU (central processing unit).

Further, the client computer 1 and the server computer 2 are respectively provided with connecting portions 1f and 2f such as modems for connecting to the transmission medium 3 and a CD-ROM (Comparator).
ct Disk Read Only Memory)
Reading units 1g and 2g for reading data such as programs from
, And the components are interconnected by bus lines 1h and 2h, respectively.

From the recording medium 4 for the client computer 1, a program for creating three-dimensional shape data of a house or the like, and three-dimensional shape data transmitted from the server computer 2 via the transmission medium 3 and representing the surroundings of the house, A program for synthesizing the three-dimensional shape data of the house,
A walk-through program that sets the viewpoint with respect to the synthesized three-dimensional shape data, and changes or stops the viewpoint position and the line-of-sight direction to render the house and the surrounding environment as a moving image or a still image using a CG image. Are read by the reading unit 1f and installed in the storage unit 1e.

From the recording medium 5 for the server computer 2, based on a request from the client computer 1,
A program for transmitting the three-dimensional shape data of the terrain around the desired area and the existing structure to the client computer 1 via the transmission medium 3 and the three-dimensional shape data of the new building from the client computer 1 are transmitted to the transmission medium. 3, a program for synthesizing the data with the three-dimensional shape data around the location of the building and storing the data in the storage unit 2e is read by the reading unit 2f and installed in the storage unit 2e.

In the flowchart of FIG. 2, when a user walks through a house (building) scheduled to be built with a client computer 1 prepared at home or the like, as described in detail below, the client computer 1 plans to build a house. After creating three-dimensional shape data of a house (hereinafter referred to as a main house) (S1), the client computer 1
Is connected to the server computer 2 of the building company via the Internet using the transmission medium 3 (S2).

Subsequently, the server computer 2 transmits the three-dimensional shape data representing the periphery of the planned construction site of the home to the client computer 1 (S3), and the client computer 1 combines the data with the three-dimensional shape data representing the home. Is performed (S4). Thereafter, a walk-through is performed on the client computer 1 using the three-dimensional shape data of the home and the surrounding environment (S5). Then, when the design of the house is completed, the three-dimensional shape data of the house is transmitted to the server computer 2 via the transmission medium 3, and can be registered after being synthesized with the three-dimensional shape data of the surrounding environment ( S6).

Hereinafter, first, the client computer 1
The procedure for creating the three-dimensional shape data of the main house will be described. The output unit 1b of the client computer 1 is shown in FIG.
Display device 6 (CRT (Cathode Ray Tube) shown in FIG.
, Etc.), when creating the three-dimensional shape data, a plan view creation screen as shown in the figure is displayed. Here, in the image display area A1 displayed on the center and the left side, the tools T (buttons, selection columns, etc.) displayed on the right tool display area A2 are displayed.
Create a floor plan for each floor using.

Although the procedure for creating this plan view is not described in detail, the "room name" and "area" are designated using the tools T displayed in the tool display area A2, and the image display area is designated. The layout can be designed only by designating the position of the “room” in A1 with a mouse or the like (not shown). Further, the equipment can be arranged only by designating the "type" of the "equipment" to be arranged in each room and the arrangement position.

Since each room and equipment used in the above-described design are created as three-dimensional shape data to which height dimensions are given in advance, a plan view as shown in FIG. 3 is created for each floor of the house. Only by doing so, three-dimensional shape data of each room and equipment is created. The three-dimensional shape data is further subjected to a coloring process (including not only the selection of colors but also the selection of wallpaper patterns, etc.) for each area of the house, and the coloring data is processed together with the three-dimensional shape data. Storage unit 1e
Is stored.

The distance between adjacent grids G in the vertical and horizontal directions on the plan view corresponds to, for example, an actual predetermined dimension of the house, for example, "1 m". Also,
In the direction setting field C1, the angle formed by the north (N) direction of the home with respect to the upward direction of the display device 6 in a numerical value in the range of 0 to 360 ° (the upward direction is 0 ° and the value increases clockwise). When input, this value is stored in the storage unit 1e,
The north direction is displayed by an arrow in the image display area A1.

The storage unit 2e of the server computer 2 stores three-dimensional shape data of an existing structure on the terrain (on the ground) for each region in Japan. The above-mentioned structures include various types of man-made structures outdoors such as roads and parks, in addition to various buildings. The three-dimensional shape data of these terrain and existing structures is collected by aeronautical surveying technology using an aircraft, surveying technology using an artificial satellite, measuring technology using a three-dimensional camera, and the like. The shape data are sequentially combined at the same scale.

Next, a procedure for creating three-dimensional shape data of a main house to be built by the client computer 1 and then combining the three-dimensional shape data with the three-dimensional shape data of the surrounding environment of the planned building site will be described. In this case, by clicking the synthesizing button B1 on the screen of FIG. 3, the synthesizing screen of FIG. 4 is started, and by further clicking the download button B2, the client computer 1 is connected via the transmission medium 3 via the Internet. Connect to server computer 2.

Subsequently, when the place name of the planned construction site of the house is entered in the place name input field C2 or the longitude and latitude are entered in the longitude / latitude input field C3, the area surrounding the area corresponding to the place name or the longitude and latitude is entered. Is transmitted (downloaded) from the storage unit 2e of the server computer 2 to the client computer 1 via the transmission medium 3, is temporarily stored in the storage unit 1e, and is displayed in the image display area A3.

In this case, when the vertical and horizontal scroll keys D1 and D2 are operated in the up / down or left / right direction, a signal indicating that the display area should be sequentially changed is sent to the server computer 2, and the server computer 2 sends a signal to a different area. By transmitting the plan view, the area displayed in the image display area A3 is switched.

When a building display button B3 is clicked in a state where the planned construction site of the main house is displayed in the image display area A3, as shown in FIG. 5, a plan view of the main house is located substantially at the center of the image display area A3. Are displayed on the same scale as the surrounding environment and in the same direction (the upward direction of the display device 6 is the north direction).

Here, the top view of the home is highlighted (indicated by hatching in FIG. 5), and moved to a desired position in the surrounding environment by dragging with a mouse (not shown). Click OK button B4.
In the storage unit 1e of the client computer 1, the three-dimensional shape data of the home created by the client computer 1 and the three-dimensional shape data of the surrounding environment transmitted from the server computer 2 are combined, and the storage unit is stored in a combined state. 1e. Then, as shown in FIG. 6, such a combined state of the home and the surrounding environment is displayed on the display device 6.

Next, the principle of walk-through will be described.
As shown in FIG. 7, here, for the sake of simplicity, a case in which walk-through is performed using only the three-dimensional shape data M of the main house to be built will be described. Assuming that the viewpoint for the three-dimensional shape data M is V and the gazing point is U, the line of sight direction E is a direction from the viewpoint V to the gazing point U. Note that the gazing point U is data used for convenience to determine the viewing direction E, and the viewing direction E is the same at any point as long as the point is closer to the point V than the point V on the straight line VU. Become.

When generating an image when the viewing direction E is viewed from the viewpoint V as a CG image, a quadrangular pyramid F corresponding to a predetermined viewing angle is set with the viewing direction E as the center line in the horizontal direction and the vertical direction. Then, a two-dimensional image obtained by projecting a region included in the quadrangular pyramid F in the three-dimensional shape data M onto a projection plane G (a cross section of the quadrangular pyramid F) is cut out, and an image in the projection plane G (see FIG. H section) is displayed as a walk-through CG image.

The calculation for generating the CG image based on the viewpoint V and the line-of-sight direction E is executed by the CG image generating program. Note that, for example, the viewpoint V
Is advanced, the quadrangular pyramid F in the three-dimensional shape data M is
, The area closer to the main house is depicted in the CG image. In this way, according to the forward or backward movement of the viewpoint V or the change of the line of sight E, the inside and outside of the house is displayed as a moving image or a still image by the CG image.

In practice, a walk-through is performed in a state where the main house to be built and the surrounding environment are combined.
The walk-through button B6 in the tool display area A2 in FIG.
By clicking, the walk-through screen of FIG. 8 is displayed. In the sub-window A3 of this screen, a plan view of the home and the surrounding environment is reduced and displayed, and the user sets a viewpoint position setting button B7 and a gazing point position setting button B8.
Is used as a reference point for CG image generation, and a gazing point U
By setting the position of the (observation point), a virtual image when the gazing point U is viewed from the viewpoint V is displayed in the image display area A1 as a walk-through initial screen by a CG image. The height of the viewpoint V and the gazing point U is set to the height of the eyes of a person having an average height by default, but a desired value can be input.

Here, a walk-through screen in which the viewpoint V and the gazing point U are set in a park P facing the home with a road R therebetween is illustrated. At the time of the walk-through, the user appropriately clicks the buttons B11 to B16 such as “forward”, “backward”, “left rotation”, “right rotation”, “upward rotation”, and “downward rotation” in the tool display area A2. When the movement of the viewpoint V and the change of the line-of-sight direction E are performed as described above, the change of the viewpoint V and the line-of-sight direction E on the image display area A1 causes the change of the viewpoint V and the line-of-sight direction E. The environment is displayed as a moving image or a still image by the CG image.

For example, when the user “forwards” on the display device 6,
Alternatively, when the “retreat” buttons B15 and B16 are clicked, the viewpoint V moves forward or backward, so that the CG image representing the main house or the adjacent house (“Takahashi house”) is enlarged or reduced in the image display area A1. Become.

FIG. 9 shows a state where the viewpoint V is advanced from the state of FIG. Further, when the "left rotation" or "right rotation" button B11 or B12 is clicked, the line-of-sight direction E changes to the left or right, etc., while the "upward rotation".
Alternatively, when the "downward rotation" buttons B13 and B14 are clicked, the line-of-sight direction E changes upward or downward, and the CG image displayed in the image display area A1 changes accordingly.

FIG. 10 shows a state in which the viewpoint V of the walk-through has been moved indoors of the home. in this case,
If necessary, the positions of the viewpoint V and the gazing point U may be reset to the indoor side using the viewpoint position setting button B7 and the gazing point position setting button B8. When the viewpoint V and the gazing point U are set to the indoor side, only the plan view of the house is displayed on the sub-window A3.
The walk-through can be performed indoors by clicking 11 to B16 or the like.

As described above, in this embodiment, it is possible to perform a walk-through not only on the indoor side of the house but also on the outdoor surrounding environment, and for the surrounding environment, the place name and the latitude / longitude can be obtained. The three-dimensional shape data can be supplied from the server computer 2 only by inputting, so that the client computer 1 does not need to create three-dimensional shape data of the surrounding environment.

As a result of the walk-through, if it is determined that a change in the floor plan of the house is necessary, the display returns to the plan view creation screen shown in FIG. 3 and a desired correction can be made. When the design of the house is completed, the upload button B17 is clicked on the screen of FIG.
Is connected to the server computer 2 via the transmission medium 3, and the created three-dimensional shape data of the home is uploaded to the server computer 2. Thereafter, the server computer 2 combines the three-dimensional shape data of the home with the three-dimensional shape data of the surrounding environment and stores the data in the storage unit 2e.

As described above, the three-dimensional shape data of each house created by each client computer 1 is sequentially registered in the server computer 2, and a database of shape data of many houses is created and expanded. Since the house shape data is combined with the three-dimensional shape data representing the terrain and existing structures (roads, etc.), an extremely useful database can be constructed.

[0037]

As described above, according to the first aspect of the present invention,
In the method of combining the building data and the surrounding data in the above, the three-dimensional shape data of the terrain and the existing building existing on the terrain are registered in the server computer, and the three-dimensional shape data of the building is created on the client computer. The three-dimensional shape data representing the vicinity of the planned construction site of the building is read from the server computer via the transmission medium, and the client computer combines and displays the three-dimensional shape data of the building. Even if only the three-dimensional shape data of the building itself is created above, the three-dimensional shape data including the surrounding environment of the building can be easily obtained by combining with the three-dimensional shape data representing the surrounding environment provided from the server computer. be able to. Therefore, for example, by using these three-dimensional shape data, it is possible to perform a walk-through including the surrounding environment of the building.

According to a second aspect of the present invention, in the method of the first aspect, the three-dimensional shape data of the building created on the client computer is transmitted to a server computer via a transmission medium. Since the data is registered after being synthesized with the surrounding data of the building, the three-dimensional shape data of the building created by any one of the client computers can be used by another client computer, which is useful.

A recording medium according to a third aspect is a computer-readable recording medium in which a program for causing a server computer and a client computer to execute the method according to the first or second aspect is recorded. By installing the above program on the client computer, the above-described useful method can be executed.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing the internal configuration of a client computer and a server computer according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a procedure for creating three-dimensional shape data of a house by the client computer.

FIG. 3 is an explanatory view showing how the client computer creates a plan view of each floor of the house.

FIG. 4 is an explanatory diagram showing a state in which three-dimensional shape data of a surrounding environment of a house is received from the server computer and displayed on a client computer.

FIG. 5 is an explanatory diagram showing a state in which a house is superimposed and displayed on the surrounding environment.

FIG. 6 is an explanatory diagram showing a state where a house is positioned with respect to the surrounding environment.

FIG. 7 is a schematic perspective view for explaining the principle of walk-through.

FIG. 8 is an explanatory diagram showing a state in which a walk-through is performed using the three-dimensional shape data of the house and the surrounding environment.

FIG. 9 is an explanatory diagram showing a state in which the viewpoint is advanced in the walkthrough.

FIG. 10 is an explanatory diagram showing a state where the viewpoint of the walk-through is moved to the indoor side of a house.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Server computer 2 Client computer 3 Transmission medium 4, 5 Recording medium

Claims (3)

[Claims] 1. A three-dimensional shape data of a terrain and an existing building existing on the terrain is registered in a server computer, and three-dimensional shape data of a building is created on a client computer. 3 for surrounding area
A method of synthesizing building data and surrounding data, wherein the three-dimensional shape data of the building is read out from the server computer via a transmission medium from the server computer, and is synthesized and displayed by the client computer. 2. The three-dimensional shape data of a building created on the client computer is transmitted to a server computer via a transmission medium, and is registered after being synthesized with the peripheral data of the building. How to combine the described building data and surrounding data. 3. A computer-readable recording medium on which a program for causing a server computer and a client computer to execute the method according to claim 1 or 2 is recorded.