RGB和CAD颜色索引之间的转换

admin

1. 如何获得程序路径
2. struct resbuf rb;
3. char sTemp[1024],*str;
5. ads_getvar("acadprefix",&rb);
7. strcpy(sTemp,rb.resval.string);
9. acad_free(rb.resval.rstring);
11. str=strchr(sTemp,';');
13. *str='\0';
15. str=strrchr(sTemp,'\\');
17. *str='\0';
19. 上段程序中,sTemp中存储了安装CAD的目录
20. AUTOCAD的系统变量存储了一些与安装有关的信息,虽然不多,在正常情况是够用的.与目录有关的主要有:
22. dwgprefix 当前dwg图形存储的目录
24. acadprefix   acad环境变量存储的目录
26. dwgname   当前dwg文件名
28. savefile 当前自动存储文件名
31. ///从RGB得到cad颜色索引值
32. int getNearestACI(COLORREF color)
33. {
34. long acirgb, r,g,b;
35. long mindst = 2147483647L;
36. long dst = 0;
37. int minndx = 0;
38. long red=GetRValue(color);
39. long green=GetGValue(color);
40. long blue=GetBValue(color);
41. for ( int i = 1; i < 255; i++ ) {
42.    acirgb = acdbGetRGB ( i );
43.    r =GetRValue(acirgb);
44.    g =GetGValue(acirgb);
45.    b =GetBValue(acirgb);
46.   
47.    dst = abs ( r-red) + abs ( g -green) + abs (b-blue);
48.    if ( dst < mindst ) {
49.     minndx = i;
50.     mindst = dst;
51.    }
52. }
53. return minndx;
55. }  
58. //功   能：从CAD的颜色得到RGB
59. COLORREF CGlobal::GetColorFromIndex(int colorIndex)
60. {
61. if(colorIndex < 0 || colorIndex > 255)
62. {
63.    ads_alert("传入的颜色号不在0~255之间!");
64.    return 0;
65. }
67. BYTE R, G, B;
68. #ifdef ARX_2002_dll
69. R = lpszRGBData[colorIndex*3+0];
70. G = lpszRGBData[colorIndex*3+1];
71. B = lpszRGBData[colorIndex*3+2];
72. #else
73. long zhi = acdbGetRGB(colorIndex);
74. WORD LOW = LOWORD(zhi);
75. WORD HIG = HIWORD(zhi);
76. R = LOBYTE(LOW);
77. G = HIBYTE(LOW);
78. B = LOBYTE(HIG);
79. #endif
81. return RGB(R,G,B);
83. //return acdbGetRGB(nColor);
84. }
86. 获取AcDbDimension里的属性信息
87. AcDbEntity *pEnt;
88. AcDbObjectId id;
89. AcGePoint3d ptPick;
90. ads_name eName;
91. if (acedEntSel ("Select a dimension: " , eName, asDblArray (ptPick)) != RTNORM )
92. return;
93. acdbGetObjectId (id, eName);
94. acdbOpenAcDbEntity (pEnt, id, AcDb::kForRead);
95. //----- Get the id of the block table record which owns the text entity
96. AcDbDimension *pDim =AcDbDimension::cast (pEnt);
97. if (pDim == NULL)
98. {
99. pEnt->close ();
100. return;
101. }
103. id =pDim->dimBlockId ();
104. pDim->close ();
105. AcDbBlockTableRecord *pr;
106. acdbOpenAcDbObject ((AcDbObject *&) pr, id, AcDb::kForRead);
107. //----- Iterating the block table record
108. AcDbBlockTableRecordIterator *pi;
109. pr->newIterator (pi);
110. while (!pi->done ())
111. {
112. pi->getEntity (pEnt, AcDb::kForRead);
113. if (pEnt->isKindOf (AcDbMText::desc ()))
114. {
115. AcDbMText *pt = (AcDbMText *) pEnt;
116. char *s = pt->contents ();
117. acutPrintf (s);
118. delete s;
119. }
120. pEnt->close();
121. pi->step();
122. }
123. pr->close();

复制代码