[ARX程序]：创建简单实体对象的例子，

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创建简单实体对象的例子，

2. [font=courier new]
   
3. 
   
4. /////////////////////////////////////////////
   
5. // ObjectARX defined commands
   
6. 
   
7. #include "StdAfx.h"
   
8. #include "StdArx.h"
   
9. #include "GeAssign.h"
   
10. #include "llin.h"
    
11. #include "cirvl.h"
    
12. // This is command 'CIR'
    
13. void cir()
    
14. {
    
15. 
    
16.         drw_cir();
    
17.         /*
    
18.         AcDbDatabase *pCurDb;
    
19.         AcDbBlockTable *pBlkTable;
    
20.         AcDbBlockTableRecord *pBlkTableRec;
    
21.         AcDbObjectId circId;
    
22. 
    
23.         AcDbCircle *pCirc;
    
24. 
    
25.         AcGePoint3d cen;
    
26.         AcGeVector3d normal(0.0, 0.0, 1.0);        // Plane orientation
    
27.         ads_point cp;
    
28.         double rad;
    
29. 
    
30.         acedInitGet(RSG_NONULL, NULL);
    
31.         acedGetPoint(NULL, "\nPick circle center point: ", cp);
    
32.         cen = asPnt3d(cp);        // convert the ads_point to AcGePoint3d
    
33. 
    
34.         acedInitGet(RSG_NONULL + RSG_NOZERO + RSG_NONEG, NULL);
    
35.         acedGetDist(cp, "\nCircle radius: ", &rad);
    
36. 
    
37.         // Create the circle entity
    
38.         pCirc = new AcDbCircle(cen, normal, rad);
    
39. 
    
40. 
    
41.         // We are going to add the entity to the
    
42.         // Model Space Block Table Record of the
    
43.         // Block Table
    
44.         pCurDb = acdbHostApplicationServices()->workingDatabase();
    
45.         // Open the Block Table for a read operation
    
46.         pCurDb->getBlockTable(pBlkTable, AcDb::kForRead);
    
47.         // Get the Model Space Block Table record of the Block Table
    
48.         pBlkTable->getAt(ACDB_MODEL_SPACE, pBlkTableRec, AcDb::kForWrite);
    
49.         // Add the newly crated circle entity to the
    
50.         // Block Table Record
    
51.         pBlkTableRec->appendAcDbEntity(circId, pCirc);
    
52. 
    
53. 
    
54.         // Close the Block Table, the Block Table Record
    
55.         // and the Entity
    
56. 
    
57.         pBlkTable->close();
    
58.         pBlkTableRec->close();
    
59.         pCirc->close();
    
60.         */
    
61. 
    
62. }
    
63. 
    
64. // This is command 'LIN'
    
65. void lin()
    
66. {
    
67. /*        AcDbDatabase *pCurDb;
    
68.         AcDbBlockTable *pBlkTable;
    
69.         AcDbBlockTableRecord *pBlkTableRec;
    
70.         AcDbObjectId lineId;
    
71. 
    
72.         AcDbLine *pLn;
    
73. 
    
74.         AcGePoint3d sp, ep;
    
75. 
    
76.         acedInitGet(RSG_NONULL, NULL);
    
77.         // Note how we convert an ads_point to a AcGePoint3d
    
78.         // using the mechanism (double*)(&point)
    
79.         acedGetPoint(NULL, "\nPick line start point: ", (double*)(&sp));
    
80. 
    
81.         acedInitGet(RSG_NONULL, NULL);
    
82.         acedGetPoint((double*)(&sp), "\nPick line end point: ", (double*)(&ep));
    
83. 
    
84.         // Create the line entity
    
85.         pLn = new AcDbLine(sp, ep);
    
86. 
    
87. 
    
88.         // We are going to add the entity to the
    
89.         // Model Space Block Table Record of the
    
90.         // Block Table
    
91.         pCurDb = acdbHostApplicationServices()->workingDatabase();
    
92.         // Open the Block Table for a read operation
    
93.         pCurDb->getBlockTable(pBlkTable, AcDb::kForRead);
    
94.         // Get the Model Space Block Table record of the Block Table
    
95.         pBlkTable->getAt(ACDB_MODEL_SPACE, pBlkTableRec, AcDb::kForWrite);
    
96.         // Add the newly crated circle entity to the
    
97.         // Block Table Record
    
98.         pBlkTableRec->appendAcDbEntity(lineId, pLn);
    
99. 
    
100. 
     
101.         // Close the Block Table, the Block Table record
     
102.         // and the enity
     
103. 
     
104.         pBlkTable->close();
     
105.         pBlkTableRec->close();
     
106.         pLn->close();
     
107.         */
     
108.         linne();
     
109. }
     
110. 
     
111. // This is command 'ARK'
     
112. void ark()
     
113. {
     
114.         //变量声明
     
115.         AcDbDatabase *pCurDb;
     
116.         AcDbBlockTable *pBlkTable;
     
117.         AcDbBlockTableRecord *pBlkTableRec;
     
118.         AcDbObjectId arkId;
     
119.         AcDbArc *pArc;
     
120. 
     
121.         // The AcDbArc constructors deal in terms of
     
122.         // a center point, start angle, end angle and
     
123.         // radius. There are no constructors for 3 point
     
124.         // arcs. The AcGe geometry classes allows us to
     
125.         // create a mathematical arc using 3 points from
     
126.         // which we can get the center, radius and
     
127.         // calculate the start and end angles.
     
128. 
     
129.         AcGePoint2d p1, p2, p3, cen;        // location points
     
130.         AcGePoint3d cenark;                                // center location
     
131.         AcGeLine2d lineEnt;        // 2d infinite line
     
132.         AcGeTol tol;                // tolerance used by isOn() function
     
133.         double rad, eang, sang;
     
134. 
     
135.         ads_point sp, ap, ep;
     
136. 
     
137.         acedInitGet(RSG_NONULL, NULL);
     
138.         acedGetPoint(NULL, "\nPick arc start point: ", sp);
     
139.         acedInitGet(RSG_NONULL, NULL);
     
140.         acedGetPoint(sp, "\nPick second point of arc: ", ap);
     
141.         acedGrDraw(sp, ap, 1, 0);
     
142.         // acedGrDraw draws temporary vectors from
     
143.         // start point to end point in color, with/without highlight
     
144.         acedInitGet(RSG_NONULL, NULL);
     
145.         acedGetPoint(ap, "\nPick arc end point: ", ep);
     
146.         acedGrDraw(ap, ep, 1, 0);
     
147. 
     
148.         p1[X] = sp[X];
     
149.         p1[Y] = sp[Y];
     
150. 
     
151.         p2[X] = ap[X];
     
152.         p2[Y] = ap[Y];
     
153. 
     
154.         p3[X] = ep[X];
     
155.         p3[Y] = ep[Y];
     
156. 
     
157.         lineEnt.set(p1, p3);        // create the infinite mathematical line
     
158. 
     
159.         // Create the mathematical arc
     
160.         AcGeCircArc2d geark(p1, p2, p3);
     
161.         rad = geark.radius();
     
162.         cen = geark.center();
     
163. 
     
164.         cenark.set(cen[X], cen[Y], 0.0);
     
165. 
     
166.         tol.setEqualPoint(0.001);        // set tolerance value
     
167.                                                                 // default is 1.e-10
     
168. 
     
169.         // Look at how we test to see if geometry point
     
170.         // p2 in on the infinite line defined by p1 and p3
     
171.         if(lineEnt.isOn(p2, tol))
     
172.         {
     
173.                 acutPrintf("\nPoints picked are colinear - invalid arc. ");
     
174.                 return;
     
175.         }
     
176. 
     
177. 
     
178.         // Calculate the start and end angles
     
179.         // Notice how we convert the AcGePoint2d to
     
180.         // an ads_point using the cast mechanism
     
181.         // (double*) (&point)
     
182.         sang = acutAngle((double*) (&cen), sp);
     
183.         eang = acutAngle((double*) (&cen), ep);
     
184. 
     
185. 
     
186.         // Dependant on the arc direction switch
     
187.         // the start and end angles
     
188.         if(geark.isClockWise())
     
189.         {
     
190.                 pArc = new AcDbArc(cenark, rad, eang, sang);
     
191.         }
     
192.         else
     
193.         {
     
194.                 pArc = new AcDbArc(cenark, rad, sang, eang);
     
195.         }
     
196. 
     
197.         pCurDb = acdbHostApplicationServices()->workingDatabase();
     
198.         pCurDb->getBlockTable(pBlkTable, AcDb::kForRead);
     
199.         pBlkTable->getAt(ACDB_MODEL_SPACE, pBlkTableRec, AcDb::kForWrite);
     
200.         pBlkTableRec->appendAcDbEntity(arkId, pArc);
     
201. 
     
202.         pBlkTableRec->close();
     
203.         pBlkTable->close();
     
204.         pArc->close();
     
205. }
     
206. [/font]

[font=courier new]<br /> <br /> /////////////////////////////////////////////<br /> // ObjectARX defined commands<br /> <br /> #include "StdAfx.h"<br /> #include "StdArx.h"<br /> #include "GeAssign.h"<br /> #include "llin.h"<br /> #include "cirvl.h"<br /> // This is command 'CIR'<br /> void cir()<br /> {<br /> <br />         drw_cir();<br />         /*<br />         AcDbDatabase *pCurDb;<br />         AcDbBlockTable *pBlkTable;<br />         AcDbBlockTableRecord *pBlkTableRec;<br />         AcDbObjectId circId;<br /> <br />         AcDbCircle *pCirc;<br /> <br />         AcGePoint3d cen;<br />         AcGeVector3d normal(0.0, 0.0, 1.0);        // Plane orientation<br />         ads_point cp;<br />         double rad;<br /> <br />         acedInitGet(RSG_NONULL, NULL);<br />         acedGetPoint(NULL, "\nPick circle center point: ", cp);<br />         cen = asPnt3d(cp);        // convert the ads_point to AcGePoint3d<br /> <br />         acedInitGet(RSG_NONULL + RSG_NOZERO + RSG_NONEG, NULL);<br />         acedGetDist(cp, "\nCircle radius: ", &rad);<br /> <br />         // Create the circle entity<br />         pCirc = new AcDbCircle(cen, normal, rad);<br /> <br /> <br />         // We are going to add the entity to the<br />         // Model Space Block Table Record of the<br />         // Block Table<br />         pCurDb = acdbHostApplicationServices()->workingDatabase();<br />         // Open the Block Table for a read operation<br />         pCurDb->getBlockTable(pBlkTable, AcDb::kForRead);<br />         // Get the Model Space Block Table record of the Block Table<br />         pBlkTable->getAt(ACDB_MODEL_SPACE, pBlkTableRec, AcDb::kForWrite);<br />         // Add the newly crated circle entity to the<br />         // Block Table Record<br />         pBlkTableRec->appendAcDbEntity(circId, pCirc);<br /> <br /> <br />         // Close the Block Table, the Block Table Record<br />         // and the Entity<br /> <br />         pBlkTable->close();<br />         pBlkTableRec->close();<br />         pCirc->close();<br />         */<br /> <br /> }<br /> <br /> // This is command 'LIN'<br /> void lin()<br /> {<br /> /*        AcDbDatabase *pCurDb;<br />         AcDbBlockTable *pBlkTable;<br />         AcDbBlockTableRecord *pBlkTableRec;<br />         AcDbObjectId lineId;<br /> <br />         AcDbLine *pLn;<br /> <br />         AcGePoint3d sp, ep;<br /> <br />         acedInitGet(RSG_NONULL, NULL);<br />         // Note how we convert an ads_point to a AcGePoint3d<br />         // using the mechanism (double*)(&point)<br />         acedGetPoint(NULL, "\nPick line start point: ", (double*)(&sp));<br /> <br />         acedInitGet(RSG_NONULL, NULL);<br />         acedGetPoint((double*)(&sp), "\nPick line end point: ", (double*)(&ep));<br /> <br />         // Create the line entity<br />         pLn = new AcDbLine(sp, ep);<br /> <br /> <br />         // We are going to add the entity to the<br />         // Model Space Block Table Record of the<br />         // Block Table<br />         pCurDb = acdbHostApplicationServices()->workingDatabase();<br />         // Open the Block Table for a read operation<br />         pCurDb->getBlockTable(pBlkTable, AcDb::kForRead);<br />         // Get the Model Space Block Table record of the Block Table<br />         pBlkTable->getAt(ACDB_MODEL_SPACE, pBlkTableRec, AcDb::kForWrite);<br />         // Add the newly crated circle entity to the<br />         // Block Table Record<br />         pBlkTableRec->appendAcDbEntity(lineId, pLn);<br /> <br /> <br />         // Close the Block Table, the Block Table record<br />         // and the enity<br /> <br />         pBlkTable->close();<br />         pBlkTableRec->close();<br />         pLn->close();<br />         */<br />         linne();<br /> }<br /> <br /> // This is command 'ARK'<br /> void ark()<br /> {<br />         //变量声明<br />         AcDbDatabase *pCurDb;<br />         AcDbBlockTable *pBlkTable;<br />         AcDbBlockTableRecord *pBlkTableRec;<br />         AcDbObjectId arkId;<br />         AcDbArc *pArc;<br /> <br />         // The AcDbArc constructors deal in terms of<br />         // a center point, start angle, end angle and<br />         // radius. There are no constructors for 3 point<br />         // arcs. The AcGe geometry classes allows us to<br />         // create a mathematical arc using 3 points from<br />         // which we can get the center, radius and <br />         // calculate the start and end angles. <br /> <br />         AcGePoint2d p1, p2, p3, cen;        // location points<br />         AcGePoint3d cenark;                                // center location<br />         AcGeLine2d lineEnt;        // 2d infinite line<br />         AcGeTol tol;                // tolerance used by isOn() function<br />         double rad, eang, sang;<br /> <br />         ads_point sp, ap, ep;<br /> <br />         acedInitGet(RSG_NONULL, NULL);<br />         acedGetPoint(NULL, "\nPick arc start point: ", sp);<br />         acedInitGet(RSG_NONULL, NULL);<br />         acedGetPoint(sp, "\nPick second point of arc: ", ap);<br />         acedGrDraw(sp, ap, 1, 0);<br />         // acedGrDraw draws temporary vectors from<br />         // start point to end point in color, with/without highlight<br />         acedInitGet(RSG_NONULL, NULL);<br />         acedGetPoint(ap, "\nPick arc end point: ", ep);<br />         acedGrDraw(ap, ep, 1, 0);<br /> <br />         p1[X] = sp[X];<br />         p1[Y] = sp[Y];<br /> <br />         p2[X] = ap[X];<br />         p2[Y] = ap[Y];<br /> <br />         p3[X] = ep[X];<br />         p3[Y] = ep[Y];<br /> <br />         lineEnt.set(p1, p3);        // create the infinite mathematical line<br /> <br />         // Create the mathematical arc<br />         AcGeCircArc2d geark(p1, p2, p3);<br />         rad = geark.radius();<br />         cen = geark.center();<br /> <br />         cenark.set(cen[X], cen[Y], 0.0);<br /> <br />         tol.setEqualPoint(0.001);        // set tolerance value<br />                                                                 // default is 1.e-10<br /> <br />         // Look at how we test to see if geometry point<br />         // p2 in on the infinite line defined by p1 and p3<br />         if(lineEnt.isOn(p2, tol))<br />         {<br />                 acutPrintf("\nPoints picked are colinear - invalid arc. ");<br />                 return;<br />         }<br /> <br /> <br />         // Calculate the start and end angles<br />         // Notice how we convert the AcGePoint2d to<br />         // an ads_point using the cast mechanism<br />         // (double*) (&point)<br />         sang = acutAngle((double*) (&cen), sp);<br />         eang = acutAngle((double*) (&cen), ep);<br /> <br /> <br />         // Dependant on the arc direction switch<br />         // the start and end angles<br />         if(geark.isClockWise())<br />         {<br />                 pArc = new AcDbArc(cenark, rad, eang, sang);<br />         }<br />         else<br />         {<br />                 pArc = new AcDbArc(cenark, rad, sang, eang);<br />         }<br /> <br />         pCurDb = acdbHostApplicationServices()->workingDatabase();<br />         pCurDb->getBlockTable(pBlkTable, AcDb::kForRead);<br />         pBlkTable->getAt(ACDB_MODEL_SPACE, pBlkTableRec, AcDb::kForWrite);<br />         pBlkTableRec->appendAcDbEntity(arkId, pArc);<br /> <br />         pBlkTableRec->close();<br />         pBlkTable->close();<br />         pArc->close();<br /> }<br /> [/font]