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2026-06-18

获取节点坐标 - GetNodeCoordinates ​

函数简介 ​

获取指定节点的坐标信息，返回JSON字符串。

接口名称 ​

GetNodeCoordinates

DLL调用 ​

c
int64_t GetNodeCoordinates(int64_t instance, int64_t graphPtr, char* name);

参数说明 ​

参数名类型说明
instance长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
graphPtr长整数型图的指针，由 CreateGraph 或 CreateGraphFromCoordinates 返回。
name字符串节点名称。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long graphPtr = ola.CreateGraphFromCoordinates("[{\"name\":\"A\",\"x\":0,\"y\":0},{\"name\":\"B\",\"x\":100,\"y\":0},{\"name\":\"C\",\"x\":50,\"y\":80}]", true, 200.0, true);
if (graphPtr != 0) {
    std::string coords = ola.GetNodeCoordinates(graphPtr, "A");
    ola.DeleteGraph(graphPtr);
}
csharp
using OLAPlug;

var ola = new OLAPlugServer();
long graphPtr = ola.CreateGraphFromCoordinates(@"[{"name":"A","x":0,"y":0},{"name":"B","x":100,"y":0},{"name":"C","x":50,"y":80}]", true, 200.0, true);
if (graphPtr != 0) {
    string coords = ola.GetNodeCoordinates(graphPtr, "A");
    ola.DeleteGraph(graphPtr);
}
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
graph_ptr = ola.CreateGraphFromCoordinates(r'[{"name":"A","x":0,"y":0},{"name":"B","x":100,"y":0},{"name":"C","x":50,"y":80}]', True, 200.0, True)
if graph_ptr != 0:
    coords = ola.GetNodeCoordinates(graph_ptr, "A")
    ola.DeleteGraph(graph_ptr)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
long graphPtr = ola.CreateGraphFromCoordinates("[{\"name\":\"A\",\"x\":0,\"y\":0},{\"name\":\"B\",\"x\":100,\"y\":0},{\"name\":\"C\",\"x\":50,\"y\":80}]", true, 200.0, true);
if (graphPtr != 0) {
    ola.GetNodeCoordinates(graphPtr, "A");
    ola.DeleteGraph(graphPtr);
}
cpp
var ola = com("OlaPlug.OlaSoft")
long graphPtr = ola.CreateGraphFromCoordinates("[{\"name\":\"A\",\"x\":0,\"y\":0},{\"name\":\"B\",\"x\":100,\"y\":0},{\"name\":\"C\",\"x\":50,\"y\":80}]", true, 200.0, true);
if (graphPtr != 0) {
    ola.GetNodeCoordinates(graphPtr, "A");
    ola.DeleteGraph(graphPtr)
}
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
long graphPtr = ola.CreateGraphFromCoordinates("[{\"name\":\"A\",\"x\":0,\"y\":0},{\"name\":\"B\",\"x\":100,\"y\":0},{\"name\":\"C\",\"x\":50,\"y\":80}]", true, 200.0, true);
if (graphPtr != 0) {
    ola.GetNodeCoordinates(graphPtr, "A");
    ola.DeleteGraph(graphPtr)
End If
text
.局部变量 ola, OLAPlug
ola.创建 ()
long graphPtr = ola.CreateGraphFromCoordinates(“[{\“name\“:\“A\“,\“x\“:0,\“y\“:0},{\“name\“:\“B\“,\“x\“:100,\“y\“:0},{\“name\“:\“C\“,\“x\“:50,\“y\“:80}]“, true, 200.0, true);
if (graphPtr != 0) {
    ola.GetNodeCoordinates(graphPtr, "A");
    ola.DeleteGraph (graphPtr)
.如果真结束
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
long graphPtr = ola.CreateGraphFromCoordinates("[{\"name\":\"A\",\"x\":0,\"y\":0},{\"name\":\"B\",\"x\":100,\"y\":0},{\"name\":\"C\",\"x\":50,\"y\":80}]", true, 200.0, true);
if (graphPtr != 0) {
    ola.GetNodeCoordinates(graphPtr, "A");
    ola.DeleteGraph(graphPtr);
}
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
long graphPtr = ola.CreateGraphFromCoordinates("[{\"name\":\"A\",\"x\":0,\"y\":0},{\"name\":\"B\",\"x\":100,\"y\":0},{\"name\":\"C\",\"x\":50,\"y\":80}]", true, 200.0, true);
if (graphPtr != 0) {
    ola.GetNodeCoordinates(graphPtr, "A");
    ola.DeleteGraph(graphPtr)
}
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long graphPtr = ola.CreateGraphFromCoordinates("[{\"name\":\"A\",\"x\":0,\"y\":0},{\"name\":\"B\",\"x\":100,\"y\":0},{\"name\":\"C\",\"x\":50,\"y\":80}]", true, 200.0, true);
if (graphPtr != 0) {
    ola.GetNodeCoordinates(graphPtr, "A");
    ola.DeleteGraph(graphPtr);
}

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
long graphPtr = CreateGraphFromCoordinates(instance, "[{\"name\":\"A\",\"x\":0,\"y\":0},{\"name\":\"B\",\"x\":100,\"y\":0},{\"name\":\"C\",\"x\":50,\"y\":80}]", 1, 200.0, 1);
if (graphPtr != 0) {
    GetNodeCoordinates(instance, graphPtr, "A");
    DeleteGraph(instance, graphPtr);
}
csharp
using System.Runtime.InteropServices;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();

long instance = CreateCOLAPlugInterFace();
long graphPtr = CreateGraphFromCoordinates(instance, @"[{"name":"A","x":0,"y":0},{"name":"B","x":100,"y":0},{"name":"C","x":50,"y":80}]", 1, 200.0, 1);
if (graphPtr != 0) {
    GetNodeCoordinates(instance, graphPtr, "A");
    DeleteGraph(instance, graphPtr);
}
python
from ctypes import CDLL, c_int, c_int64

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
long graphPtr = CreateGraphFromCoordinates(instance, b'[{"name":"A","x":0,"y":0},{"name":"B","x":100,"y":0},{"name":"C","x":50,"y":80}]', 1, 200.0, 1);
if (graphPtr != 0) {
    GetNodeCoordinates(instance, graphPtr, "A");
    DeleteGraph(instance, graphPtr);
}

返回值 ​

返回值说明
（返回值）返回节点坐标信息的JSON字符串指针，格式为：。
json
{"name": "节点名", "x": 坐标X, "y": 坐标Y}

节点不存在返回0。

返回的字符串指针需要调用 FreeStringPtr 释放内存。