复杂实体

复杂实体（折线或块）必须通过多次调用来创建，对每个子实体使用单独的调用。当第一次收到复杂实体的初始组件时，它会创建一个临时文件，用于收集定义数据（和扩展数据，如果存在）。每个后续调用都会将新的子实体追加到文件中。当复杂图元的定义完成时（即，当接收适当或子图元时），将检查图元的一致性，如果有效，则将其添加到图形中。当复杂实体完成或取消创建时，将删除该文件。acdbEntMake()acdbEntMake() acdbEntMake()acdbEntMake()SeqendEndblk

下面的示例包含五个调用，用于创建单个复杂实体，即折线。折线的线型为虚线，颜色为 BLUE。它有三个顶点，分别位于坐标 （1，1，0）、（4，6，0） 和 （3，2，0）。所有其他可选定义数据均采用默认值。acdbEntMake()

int status; 
struct resbuf *entlist, result; 
ads_point newpt; 
entlist = acutBuildList(
    RTDXF0, "POLYLINE",// Entity type 
    62, 5, // Color (blue) 
    6, "dashed",// Linetype 
    66, 1, // Vertices follow.
    0); 
if (entlist == NULL) { 
    acdbFail("Unable to create result buffer list\n"); 
    return BAD; 
} 
status = acdbEntMake(entlist); 
acutRelRb(entlist); // Release acdbEntMake() buffer.
if (status != RTNORM) { 
    acutPrintf ("%d",status);
    acedGetVar ("ERRNO", &result);
    acutPrintf ("ERRNO == %d, result.resval.rint);
    acdbFail("Unable to start polyline\n"); 
    return BAD; 
} 
newpt[X] = 1.0; 
newpt[Y] = 1.0; 
newpt[Z] = 0.0; // The polyline is planar 
entlist = acutBuildList(
    RTDXF0, "VERTEX", // Entity type 
    62, 5, // Color (blue)
    6, "dashed", // Linetype 
    10, newpt, // Start point 
    0); 
if (entlist == NULL) { 
    acdbFail("Unable to create result buffer list\n"); 
    return BAD; 
} 
status = acdbEntMake(entlist); 
acutRelRb(entlist); // Release acdbEntMake() buffer.
if (status != RTNORM) { 
    acdbFail("Unable to add polyline vertex\n"); 
    return BAD; 
} 
newpt[X] = 4.0; 
newpt[Y] = 6.0; 
entlist = acutBuildList(
    RTDXF0, "VERTEX", // Entity type 
    62, 5, // Color (blue)
    6, "dashed", // Linetype
    10, newpt, // Second point 
    0); 
if (entlist == NULL) { 
    acdbFail("Unable to create result buffer list\n"); 
    return BAD; 
} 
status = acdbEntMake(entlist); 
acutRelRb(entlist); // Release acdbEntMake() buffer.
if (status != RTNORM) { 
    acdbFail("Unable to add polyline vertex\n"); 
    return BAD; 
} 
newpt[X] = 3.0; 
newpt[Y] = 2.0; 
entlist = acutBuildList(
    RTDXF0, "VERTEX", // Entity type 
    62, 5, // Color (blue)
    6, "dashed", // Linetype
    10, newpt, // Third point 
    0); 
if (entlist == NULL) { 
    acdbFail("Unable to create result buffer list\n"); 
    return BAD; 
} 
status = acdbEntMake(entlist); 
acutRelRb(entlist); // Release acdbEntMake() buffer.
if (status != RTNORM) { 
    acdbFail("Unable to add polyline vertex\n"); 
    return BAD; 
} 
entlist = acutBuildList(
    RTDXF0, "SEQEND", // Sequence end 
    62, 5, // Color (blue)
    6, "dashed", // Linetype
    0); 
if (entlist == NULL) { 
    acdbFail("Unable to create result buffer list\n"); 
    return BAD; 
} 
status = acdbEntMake(entlist); 
acutRelRb(entlist); // Release acdbEntMake() buffer.
if (status != RTNORM) { 
    acdbFail("Unable to complete polyline\n"); 
    return BAD; 
} 

创建块类似，只是当成功创建实体时，它会返回一个值 of。您可以通过调用 to 来验证新块的名称。acdbEntMake()EndblkRTKWORDacedGetInput()