JPH11110437A - Method for evaluating quality of curved surface data - Google Patents
Method for evaluating quality of curved surface dataInfo
- Publication number
- JPH11110437A JPH11110437A JP9287845A JP28784597A JPH11110437A JP H11110437 A JPH11110437 A JP H11110437A JP 9287845 A JP9287845 A JP 9287845A JP 28784597 A JP28784597 A JP 28784597A JP H11110437 A JPH11110437 A JP H11110437A
- Authority
- JP
- Japan
- Prior art keywords
- curved surface
- data
- band
- light source
- band portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＣＡＤシステムに
蓄積された物体の曲面に関するデータの品質を、そのＣ
ＡＤシステム上で容易に評価できる方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the quality of data relating to a curved surface of an object stored in a CAD system.
The present invention relates to a method that can be easily evaluated on an AD system.
【０００２】[0002]
【従来の技術】ＣＡＤシステムに蓄積された車体表面の
曲面データを評価する従来の第１方法は、車体表面から
離れた場所に描かれた複数の平行線が、曲面を形成する
その車体表面上にそれぞれ曲線として映し込まれる状況
をＣＡＤシステム内で計算し、その結果を図４に例示し
たようにＣＡＤシステム内の画面上に各曲線１０として
表示し、各曲線１０の滑らかな屈曲状態等を観察するこ
とにより、曲面データの良否を判定しており、この場合
には、各曲線１０の屈曲状態から曲面データにおける非
常に小さな歪みの有無等を判別できて、曲面の品質を良
好に評価できると共に、複数の直線群を示すデータを取
り扱うため比較的計算量が少なくてすみ、短時間で計算
を終了させることができて、計算結果である曲線の屈曲
状態を画面上へ迅速に表示させることが可能であるが、
単なる各曲線１０の表示であるため、実車における陰影
のごときリアルな感覚での曲面表示は非常に困難な不具
合があった。2. Description of the Related Art A first conventional method for evaluating curved surface data of a vehicle body surface stored in a CAD system is that a plurality of parallel lines drawn at a position distant from the vehicle body surface form a curved surface on the vehicle body surface. Are calculated as curves in the CAD system, and the results are displayed as curves 10 on the screen in the CAD system as illustrated in FIG. By observing, the quality of the curved surface data is determined. In this case, the presence or absence of very small distortion in the curved surface data can be determined from the bending state of each curve 10, and the quality of the curved surface can be evaluated well. In addition, since data representing a plurality of straight line groups is handled, the amount of calculation is relatively small, the calculation can be completed in a short time, and the bending state of the curve as a calculation result is quickly displayed on the screen. Although it is possible to display on,
Since it is merely a display of each curve 10, there is a problem that it is very difficult to display a curved surface with a realistic feeling such as a shadow in an actual vehicle.
【０００３】また、従来の第２方法は、車体表面から離
れて任意の場所に設定された点光源、もしくは、平行光
源により、曲面を形成するその車体表面上の陰影をＣＡ
Ｄシステム内で計算し、その結果を車体表面の明暗を表
す陰影図として画面上に表示し、車体表面上における各
部陰影の変化状況から曲面データの良否を判定する、い
わゆる、グローフォンシェーディング法であり、、この
場合には、比較的計算量が少なくてすむため短時間で計
算を終了することができて、計算結果である各部陰影の
変化状況を画面上へ迅速に表示させることが可能である
が、単なる陰影の表示であるため、車体表面の比較的大
きな凹凸データの評価が可能であるものの、実車と同様
にリアルな感覚での曲面表示が難しいと共に、実際には
点光源もしくは平行光源からの照射範囲が限定されるた
め、各部陰影の変化状況から曲面データ上における非常
に小さな歪みの有無等の品質を良好に評価することは困
難な欠点があった。The second conventional method uses a point light source or a parallel light source set at an arbitrary position away from the surface of a vehicle body to remove a shadow on the surface of the vehicle body that forms a curved surface by CA.
Calculated in the D system, the result is displayed on the screen as a shade diagram representing the lightness and darkness of the vehicle body surface, and the quality of the curved surface data is determined from the change situation of each part shadow on the vehicle body surface, the so-called glow phone shading method In this case, in this case, the calculation amount can be completed in a short time because the amount of calculation is relatively small, and it is possible to quickly display the change status of each part shadow as a calculation result on the screen. However, since it is a mere display of shadows, it is possible to evaluate relatively large unevenness data on the body surface, but it is difficult to display a curved surface with a realistic feeling like a real vehicle, and in fact, a point light source or a parallel light source Because of the limited irradiation range, it was difficult to satisfactorily evaluate the quality such as the presence or absence of very small distortion on the curved surface data based on the change in the shadow of each part.
【０００４】さらに、従来の第３方法は、車体の周囲に
現実と同一の背景及び光源があるとして、それらの立体
的データを可能な限りＣＡＤシステム内に蓄積し、それ
らが車体表面に映り込む状況を車体表面の曲面データ及
び上記立体的データから忠実に計算し、その結果を車体
表面に映し出された模様として画面上に表示し、それら
の模様から曲面データの良否を判定する、いわゆる、レ
イトレーシング法であり、この場合には、車体表面にお
ける映り込みが現実の状況とほぼ完全に一致するように
計算するため、実車と同様にリアルな感覚での曲面表示
がきわめて良好に行われ、従ってまた、車体表面の上記
映り込みから曲面データにおける非常に小さな歪みの有
無等の品質を的確に評価できるが、必要な計算量が膨大
となって大型のＣＰＵでも時間が相当にかかるので、コ
スト上の問題があると共に、計算結果である車体表面の
映り込み状況を画面上へ迅速に表示することができず、
従って、曲面データの品質評価に長時間を要するという
実際的な不具合は避けられなかった。Further, in the third conventional method, assuming that the background and the light source are the same as the reality around the vehicle body, those three-dimensional data are accumulated in the CAD system as much as possible, and these are reflected on the vehicle body surface. The situation is faithfully calculated from the curved surface data of the vehicle body surface and the three-dimensional data, the result is displayed on the screen as a pattern projected on the vehicle body surface, and the quality of the curved surface data is determined from those patterns, so-called late This is a racing method.In this case, since the reflection on the vehicle body surface is calculated so as to almost completely match the actual situation, the curved surface display with a realistic feeling like a real vehicle is performed very well, and therefore, In addition, the quality of the curved surface data, such as the presence or absence of very small distortion, can be accurately evaluated from the reflection of the vehicle body surface. Since U even time consuming considerable, with some cost problems can not be quickly view the status of reflection of the body surface is a calculation result on the screen,
Therefore, a practical problem that it takes a long time to evaluate the quality of curved surface data cannot be avoided.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、ＣＡＤシス
テムに蓄積された物体の曲面に関するデータの品質を、
比較的容易に評価することができる方法を提供しようと
するものである。According to the present invention, the quality of data relating to a curved surface of an object stored in a CAD system is improved.
It is intended to provide a method that can be evaluated relatively easily.
【０００６】[0006]
【課題を解決するための手段】このため、本発明にかか
る曲面データの品質評価法は、物体の曲面を表示する曲
面データをＣＡＤシステムに蓄積すると共に、上記曲面
と間隔をおいた面上にそれぞれ明度が異なって交互に配
置されそれぞれ直線的に延びる第１帯状部分及び第２帯
状部分を光源に見立てた光源データを上記ＣＡＤシステ
ムに蓄積し、上記曲面上における上記第１帯状部分及び
上記第２帯状部分の映し込みを上記曲面データ及び上記
光源データに基づいて上記ＣＡＤシステムが画成し、そ
の画成結果を上記ＣＡＤシステムの画面上に表示して、
表示された第１帯状部分及びまたは上記第２帯状部分の
屈曲状況、及びまたは、第１帯状部分及びまたは上記第
２帯状部分における幅の変化状況により上記曲面データ
の良否を判定する。Therefore, a method for evaluating the quality of curved surface data according to the present invention accumulates curved surface data representing a curved surface of an object in a CAD system, and also stores the data on a surface spaced from the curved surface. Light source data in which the first band-shaped portion and the second band-shaped portion which are alternately arranged with different lightness and respectively extend linearly are regarded as light sources are stored in the CAD system, and the first band-shaped portion and the second band-shaped portion on the curved surface are stored. The reflection of the two strips is defined by the CAD system based on the curved surface data and the light source data, and the definition result is displayed on the screen of the CAD system.
The quality of the curved surface data is determined based on the displayed bending state of the first band portion and / or the second band portion and / or the change state of the width of the first band portion and / or the second band portion.
【０００７】すなわち、曲面に対する第１帯状部分及び
第２帯状部分の映し込みを画面上に表示することによ
り、第１帯状部分及びまたは上記第２帯状部分の屈曲状
況、及びまたは、第１帯状部分及びまたは第２帯状部分
における幅の変化状況により曲面データの良否を判定し
ているため、曲面データの微細部にまで視覚によって精
度良くかつ容易に評価することが可能となる。[0007] That is, the reflection of the first band-shaped portion and the second band-shaped portion on the curved surface is displayed on a screen, so that the bending state of the first band-shaped portion and / or the second band-shaped portion, and / or the first band-shaped portion. Since the quality of the curved surface data is determined based on the change in the width of the second belt-shaped portion, it is possible to accurately and easily evaluate even minute parts of the curved surface data visually.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施形態例につい
て説明する。図１に例示された車体モデル１、とくに、
その外板表面の曲面を表示する曲面データが、従来と同
様にＣＡＤシステムに蓄積されているが、さらに、車体
モデル１の上方に適当な間隔、例えば地表面から３ｍの
距離をおいて一つの水平面２を想定し、水平面２上に
は、明度が最も大きい白色で、かつ、直線的に延びる幅
がａの第１帯状部分３と、例えば紺色、赤色等の適当な
車体色に相当する明度をもち、かつ、第１帯状部分３と
平行に直線的に延びる幅がｂの第２帯状部分４とが交互
に配置されているものを光源に見立てた光源データを、
上記ＣＡＤシステムに蓄積する。Embodiments of the present invention will be described below. The vehicle model 1 illustrated in FIG. 1, in particular,
Curved surface data indicating the curved surface of the outer plate surface is stored in the CAD system in the same manner as in the related art, but is further provided at an appropriate interval above the vehicle body model 1, for example, at a distance of 3 m from the ground surface. Assuming a horizontal plane 2, on the horizontal plane 2, there is a first band-shaped portion 3 having the maximum lightness and having a width a that extends linearly, and a lightness corresponding to an appropriate body color such as, for example, dark blue or red. And light source data in which the first band-shaped portion 3 and the second band-shaped portion 4 having a width b linearly extending in parallel and arranged alternately are regarded as light sources,
The data is stored in the CAD system.
【０００９】なお、光源データにおいて、第１帯状部分
３及び第２帯状部分４の境界には、図２に示されている
ように、第１帯状部分３から第２帯状部分４に向かって
徐々に明度が減少する比較的小さい幅の徐変領域５が設
定され、徐変領域５内の明度は、第１帯状部分３の近傍
では比較的大きいが、第１帯状部分３からある程度離れ
ると急激に減少し、第２帯状部分４の近傍では比較的緩
やかに減少して、第２帯状部分４と一致するように調整
されている。In the light source data, the boundary between the first band portion 3 and the second band portion 4 gradually extends from the first band portion 3 to the second band portion 4 as shown in FIG. A gradually changing region 5 having a relatively small width in which the brightness decreases is set, and the brightness in the gradually changing region 5 is relatively large in the vicinity of the first band portion 3, but sharply increases to some extent from the first band portion 3. , And gradually decreases near the second band-shaped portion 4, and is adjusted so as to coincide with the second band-shaped portion 4.
【００１０】また、車体モデル１の側方に適当な距離、
例えば２ｍ離れて、適当な高さ、例えば地表面から１．
５ｍの距離をおいて一つの視点６を想定し、車体モデル
１に対する視点６の相対的位置を視点データとして上記
ＣＡＤシステムに記憶させる。An appropriate distance beside the vehicle body model 1
For example, 2 m away from a suitable height, for example 1.
Assuming one viewpoint 6 at a distance of 5 m, the CAD system stores the relative position of the viewpoint 6 with respect to the vehicle body model 1 as viewpoint data.
【００１１】次に、視点６から車体モデル１上における
任意の一点Ａヘ延ばした直線が、点Ａの面法線Ａ´と対
称的に点Ａで反射して水平面２に達した点Ｂを上記ＣＡ
Ｄシステムにより計算し、一つの第１帯状部分３におけ
る長手方向中心線を始点とする水平面２の端縁から点Ｂ
までの距離Ｌを算出する。Next, a straight line extending from the viewpoint 6 to an arbitrary point A on the vehicle body model 1 is reflected at the point A symmetrically with respect to the surface normal A 'of the point A to a point B reaching the horizontal plane 2. The above CA
The point B is calculated from the edge of the horizontal plane 2 starting from the longitudinal center line in one of the first strip-shaped portions 3 and calculated by the D system.
Is calculated.
【００１２】この場合、水平面２上に第１帯状部分３及
び第２帯状部分４が交互に配置されているので、Ｌ／
（ａ＋ｂ＋２ｃ）の端数がａ／２以内であれば、また
は、ａ／２＋ｂ＋２ｃより大きく、かつ、ａ＋ｂ＋２ｃ
より小さければ（図１の状態）、点Ａの明度は第１帯状
部分３の明度であるとして上記ＣＡＤシステムに記憶さ
せ、また、上記端数がａ／２より大きく、かつ、ａ／２
＋ｃより小さければ、点Ａの明度はその端数の大きさに
応じた徐変領域５内の明度であるとして上記ＣＡＤシス
テムに記憶させ、さらに、上記端数がａ／２＋ｃより大
きく、かつ、ａ／２＋ｃ＋ｂより小さければ、点Ａの明
度は第２帯状部分４の明度であるとして上記ＣＡＤシス
テムに記憶させ、また、上記端数がａ／２＋ｃ＋ｂより
大きく、かつ、ａ／２＋２ｃ＋ｂより小さければ、点Ａ
の明度はその端数の大きさに応じた徐変領域５内の明度
であるとして上記ＣＡＤシステムに記憶させ、この要領
で、車体モデル１の表面全体における各点について、視
点６に対するそれぞれの点の明度をそれぞれ映し込みデ
ータとして上記ＣＡＤシステムが蓄積する。In this case, since the first belt-like portions 3 and the second belt-like portions 4 are alternately arranged on the horizontal plane 2, L / L
If the fraction of (a + b + 2c) is within a / 2, or is larger than a / 2 + b + 2c, and a + b + 2c
If it is smaller (the state in FIG. 1), the lightness of the point A is stored in the CAD system as the lightness of the first strip portion 3, and the fraction is larger than a / 2 and a / 2.
If it is smaller than + c, the lightness of the point A is stored in the CAD system as the lightness in the gradually changing area 5 according to the size of the fraction, and the fraction is larger than a / 2 + c and a / If the value is smaller than 2 + c + b, the lightness of the point A is stored in the CAD system as the lightness of the second band portion 4. If the fraction is larger than a / 2 + c + b and smaller than a / 2 + 2c + b, the point A is obtained.
Is stored in the CAD system as the brightness in the gradually changing area 5 according to the fractional size. In this manner, for each point on the entire surface of the vehicle body model 1, The CAD system accumulates brightness as reflected data.
【００１３】すなわち、車体モデル１の表面全体を滑ら
かな鏡面のように取り扱い、車体モデル１上の各点で
は、それぞれの点における面法線と対称的にのみ光が反
射すると想定し、視点６に対しては水平面２上の一点で
ある第１帯状部分３、第２帯状部分４または徐変領域５
が車体モデル１の表面上に映し込まれるとして計算さ
れ、その一点以外における各第１帯状部分３は、上記し
た車体モデル１上の各点に対しては光源として全く作用
していないと見做している。That is, the entire surface of the vehicle body model 1 is treated as a smooth mirror surface, and light is reflected at each point on the vehicle body model 1 only symmetrically with respect to the surface normal at each point. To the first band-shaped portion 3, the second band-shaped portion 4 or the gradually changing region 5 which is a point on the horizontal plane 2.
Is calculated as projected on the surface of the vehicle body model 1, and each of the first strip-shaped portions 3 other than one point is regarded as not acting as a light source at all with respect to each point on the vehicle body model 1. doing.
【００１４】つまり、現実の車体モデル１表面は完全な
鏡面ではないため多少の乱反射があって、視点６に対し
ては車体モデル１上の各点における面法線と対称的でな
い水平面２上の各第１帯状部分３からも光が反射してく
るが、この乱反射光はきわめて弱いためそれを省略した
こととなり、従って、第１帯状部分３が多数配置されて
いても、車体モデル１上の各点については水平面２上の
光源データにおける一点の明度がそれぞれ映し込みデー
タとしてＣＡＤシステムにより計算されるに止まるの
で、その計算量は比較的少なく抑制できると同時に、そ
れぞれの計算式も非常に簡単となる。That is, since the surface of the actual vehicle body model 1 is not a perfect mirror surface, there is some irregular reflection, and the viewpoint 6 is on the horizontal plane 2 which is not symmetric with the surface normal at each point on the vehicle body model 1. Although light is reflected from each of the first belt-shaped portions 3, the irregularly reflected light is extremely weak and thus is omitted. Therefore, even if a large number of the first belt-shaped portions 3 are arranged, the light on the vehicle body model 1 is not affected. For each point, the brightness of one point in the light source data on the horizontal plane 2 is calculated as the projection data by the CAD system, so that the calculation amount can be suppressed to a relatively small amount, and the respective calculation formulas are also very simple. Becomes
【００１５】上記のようにＣＡＤシステムにより計算さ
れて蓄積された映し込みデータに基づき、図３に例示さ
れているように、視点６に対する車体モデル１表面の第
１帯状部分３、第２帯状部分４及び徐変領域５の映し込
み状況をＣＡＤシステムの画面上へ表示し、このとき、
第１帯状部分３の映し込み部分を白色にし、第２帯状部
分４の映し込み部分を紺色、赤色等の適当な車体色にす
ると、車体モデル１の表面に相当する曲面上へ描かれた
帯状の着色縞模様として上記映し込み状況が現実的に表
現されるので、各着色縞模様の屈曲状況や各帯における
幅の部分的変化状況等により、車体モデル１の表面にお
けるうねり状態、すなわち、曲面のなめらかさ等を実車
に近似して鮮明に表現することができ、このため、視覚
によりそれを容易に確認し、また、曲面状態の良否を判
定することが可能となる。Based on the projection data calculated and accumulated by the CAD system as described above, as shown in FIG. 3, as shown in FIG. 4 and the image of the gradual change area 5 are displayed on the screen of the CAD system.
When the reflection portion of the first belt portion 3 is white and the reflection portion of the second belt portion 4 is an appropriate vehicle color such as dark blue or red, a belt shape drawn on a curved surface corresponding to the surface of the vehicle body model 1 is obtained. The reflection state is realistically expressed as a colored stripe pattern, and therefore, the undulation state on the surface of the vehicle body model 1, that is, the curved surface, due to the bending state of each colored stripe pattern, the partial change in the width of each band, and the like. And the like can be clearly expressed by approximating the actual vehicle, so that it is possible to easily confirm it visually and determine the quality of the curved surface state.
【００１６】しかも、水平面２上の光源データには、第
１帯状部分３と第２帯状部分４との境界に狭い徐変領域
５が設定されていて、画面上に表示された徐変領域５の
映し込み部分では第１帯状部分３の映し込み部分から第
２帯状部分４の映し込み部分に向かって車体色が次第に
変化し、かつ、第１帯状部分３の映し込み部分近傍では
白色に近く表現されているため、現実には光源の周辺も
反射により２次的な弱い光源として作用する微妙な状況
が画面上へ忠実に反映されることとなるので、画面上に
表示された映し込みは車体モデル１表面における実際の
映し込み状況にきわめて近く、従って、車体モデル１表
面における曲面状態の良否、すなわち、曲面データの品
質を高精度で的確に評価することができるようになる。Further, in the light source data on the horizontal plane 2, a narrow gradually changing region 5 is set at the boundary between the first band portion 3 and the second band portion 4, and the gradually changing region 5 displayed on the screen is set. In the reflection part of the vehicle body color gradually changes from the reflection part of the first belt part 3 to the reflection part of the second belt part 4, and near the reflection part of the first belt part 3 is close to white. In reality, the delicate situation in which the periphery of the light source acts as a secondary weak light source due to reflection will be faithfully reflected on the screen, so the reflection displayed on the screen is It is very close to the actual reflection situation on the surface of the vehicle body model 1, and therefore, the quality of the curved surface state on the surface of the vehicle body model 1, that is, the quality of the curved surface data can be accurately and accurately evaluated.
【００１７】上記のように、車体モデル１表面の映し込
み状況を画面上へ現実に即した状態で表示し、これに基
づきＣＡＤシステムに蓄積された曲面データの品質を高
精度で評価することができるので、必要に応じて曲面デ
ータの編集を的確に、かつ、容易に行うことができると
共に、デザイン品質を確認するため製作する高価な車体
モデル数を削減させることができる一方、映し込みデー
タの作成に要する計算量が比較的少ないため、小型のＣ
ＡＤシステムにより簡単に映し込みデータを作成して、
その映し込み状況を画面上へ迅速に表示させることが可
能となり、従って、曲面データの品質評価作業が効率的
となり、評価に要する時間を容易に短縮化できる等、コ
スト上及び実用性において大きな長所がある。As described above, the reflection state of the surface of the vehicle body model 1 is displayed on the screen in a realistic manner, and based on this, the quality of the curved surface data accumulated in the CAD system can be evaluated with high accuracy. This makes it possible to edit the curved surface data accurately and easily as needed, and to reduce the number of expensive body models to be manufactured in order to confirm the design quality. Since the amount of calculation required for creation is relatively small, a small C
Create projection data easily by AD system,
The reflection status can be quickly displayed on the screen. Therefore, the quality evaluation work of the curved surface data becomes efficient, and the time required for the evaluation can be easily reduced. There is.
【００１８】なお、上記実施形態例では水平面上に設置
された光源データが使用されているが、光源データとし
ては車体モデルの側方に適宜立てられた平面上のものを
使用するようにしてもよく、また、光源データにおける
第１帯状部分の幅と第２帯状部分の幅とを等しくし、あ
るいは、上記平面上の部分に応じて光源データにおける
第１帯状部分の幅と第２帯状部分の幅とを適宜変化させ
て、曲面のなめらかさを一層確認し易くするようにして
も、それぞれ上記実施形態例と同等の作用効果を奏する
ことができる。また、上記平面を円筒面もしくは球面等
の曲面に適宜置き換え、あるいは、光源データは平行な
線状のみでなく、交叉させた網目状のもの等、計算の容
易な幾何学的な配置とし、さらには、車体表面以外のな
めらかな曲面に対する曲面データの品質評価に利用する
ことも可能であることはいうまでもない。In the above embodiment, the light source data set on the horizontal plane is used. However, as the light source data, data on a plane appropriately set up on the side of the vehicle body model may be used. Also, the width of the first band-shaped portion and the width of the second band-shaped portion in the light source data are made equal, or the width of the first band-shaped portion and the width of the second band-shaped portion in the light source data are made according to the portion on the plane. Even if the width is appropriately changed to make it easier to confirm the smoothness of the curved surface, the same operation and effect as those of the above embodiment can be achieved. In addition, the above-mentioned plane is appropriately replaced by a curved surface such as a cylindrical surface or a spherical surface, or the light source data is not only a parallel linear shape, but also a geometric arrangement that is easy to calculate, such as a crossed mesh shape. It is needless to say that can be used for quality evaluation of curved surface data for a smooth curved surface other than the vehicle body surface.
【００１９】[0019]
【発明の効果】本発明にかかる曲面データの品質評価法
にあっては、曲面に対する第１帯状部分及び第２帯状部
分の映し込みをＣＡＤシステムの画面上に表示し、第１
帯状部分及びまたは上記第２帯状部分の屈曲状況、及び
または、第１帯状部分及びまたは第２帯状部分における
幅の変化状況に応じて曲面データの良否を判定するた
め、画面上で曲面データを精度良くかつ容易に評価でき
るという実用的な特色をそなえている。According to the method for evaluating the quality of curved surface data according to the present invention, the reflection of a first band portion and a second band portion on a curved surface is displayed on a screen of a CAD system.
In order to determine the quality of the curved surface data according to the bending state of the band portion and / or the bending state of the second band portion and / or the change state of the width of the first band portion and / or the second band portion, the curved surface data is accurately determined on the screen. It has a practical feature that can be evaluated well and easily.
【図１】本発明の実施形態例に使用された設備の概略斜
視図。FIG. 1 is a schematic perspective view of equipment used in an embodiment of the present invention.
【図２】上記設備の要部作用説明図。FIG. 2 is an explanatory diagram of an operation of a main part of the facility.
【図３】上記実施形態例の適用概略斜視図。FIG. 3 is a schematic perspective view showing the application of the embodiment.
【図４】従来方法の説明図。FIG. 4 is an explanatory view of a conventional method.
１ 車体モデル ２ 水平面 ３ 第１帯状部分 ４ 第２帯状部分 ５ 徐変領域 ６ 視点 DESCRIPTION OF SYMBOLS 1 Body model 2 Horizontal surface 3 1st belt part 4 2nd belt part 5 Slow change area 6 Viewpoint
Claims (3)
Ｄシステムに蓄積すると共に、上記曲面と間隔をおいた
面上にそれぞれ明度が異なって交互に配置されそれぞれ
直線的に延びる第１帯状部分及び第２帯状部分を光源に
見立てた光源データを上記ＣＡＤシステムに蓄積し、上
記曲面上における上記第１帯状部分及び上記第２帯状部
分の映し込みを上記曲面データ及び上記光源データに基
づいて上記ＣＡＤシステムが画成し、その画成結果を上
記ＣＡＤシステムの画面上に表示して、表示された第１
帯状部分及びまたは上記第２帯状部分の屈曲状況、及び
または、第１帯状部分及びまたは上記第２帯状部分にお
ける幅の変化状況により上記曲面データの良否を判定す
る曲面データの品質評価法。1. A surface data representing a curved surface of an object is represented by CA
The light source data accumulated in the D system and the light source data in which the first and second band-shaped portions which are alternately arranged on the curved surface and the surface spaced apart with different lightness and extend linearly from each other as light sources are used as the CAD. The CAD system accumulates the data on the curved surface and reflects the first band-shaped portion and the second band-shaped portion on the curved surface based on the curved surface data and the light source data. On the screen of the first displayed
A quality evaluation method for curved surface data that determines the quality of the curved surface data based on a bending state of the band portion and / or the second band portion and / or a change state of a width in the first band portion and / or the second band portion.
おける面法線と対称的な上記各点の反射光線のみを上記
映し込みとして上記ＣＡＤシステムが画成する曲面デー
タの品質評価法。2. The quality evaluation method for curved surface data defined by the CAD system according to claim 1, wherein only the reflected light rays at the points on the curved surface that are symmetric with respect to the surface normal at the points are reflected as the reflection.
光源データは、上記第１帯状部分と上記第２帯状部分と
の境界に上記第１帯状部分から上記第２帯状部分へ向か
って明度が次第に減少する徐変領域が設定された曲面デ
ータの品質評価法。3. The light source data according to claim 1, wherein the light source data has a brightness at a boundary between the first band portion and the second band portion from the first band portion toward the second band portion. A method for evaluating the quality of curved surface data in which gradually decreasing regions are set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28784597A JP3341650B2 (en) | 1997-10-03 | 1997-10-03 | Quality evaluation support method for surface data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28784597A JP3341650B2 (en) | 1997-10-03 | 1997-10-03 | Quality evaluation support method for surface data |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11110437A true JPH11110437A (en) | 1999-04-23 |
| JP3341650B2 JP3341650B2 (en) | 2002-11-05 |
Family
ID=17722530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28784597A Expired - Fee Related JP3341650B2 (en) | 1997-10-03 | 1997-10-03 | Quality evaluation support method for surface data |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3341650B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003085236A (en) * | 2001-09-10 | 2003-03-20 | Dainippon Printing Co Ltd | Method and device for preparing geographical pattern |
| JP2007256240A (en) * | 2006-03-27 | 2007-10-04 | Aisin Seiki Co Ltd | Surface distortion defect inspection device, inspection method, and computer program |
| JP2008292365A (en) * | 2007-05-25 | 2008-12-04 | Toyota Motor Corp | Shape evaluation method, shape evaluation device, and three-dimensional inspection device |
| JP2009230386A (en) * | 2008-03-21 | 2009-10-08 | Toyota Motor Corp | Design support device |
-
1997
- 1997-10-03 JP JP28784597A patent/JP3341650B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003085236A (en) * | 2001-09-10 | 2003-03-20 | Dainippon Printing Co Ltd | Method and device for preparing geographical pattern |
| JP4632225B2 (en) * | 2001-09-10 | 2011-02-16 | 大日本印刷株式会社 | Geometric pattern creation method and apparatus |
| JP2007256240A (en) * | 2006-03-27 | 2007-10-04 | Aisin Seiki Co Ltd | Surface distortion defect inspection device, inspection method, and computer program |
| JP2008292365A (en) * | 2007-05-25 | 2008-12-04 | Toyota Motor Corp | Shape evaluation method, shape evaluation device, and three-dimensional inspection device |
| WO2008146764A1 (en) * | 2007-05-25 | 2008-12-04 | Toyota Jidosha Kabushiki Kaisha | Shape evaluation method, shape evaluation device, and 3d inspection device |
| US8107737B2 (en) | 2007-05-25 | 2012-01-31 | Toyota Jidosha Kabushiki Kaisha | Shape evaluation method, shape evaluation device, and 3D inspection device |
| JP2009230386A (en) * | 2008-03-21 | 2009-10-08 | Toyota Motor Corp | Design support device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3341650B2 (en) | 2002-11-05 |
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