从搅拌机的特定内存位置读取数据(结构)

reading data(structure) from specific memory location from blender

本文关键字：数据 读取 结构 位置 内存 搅拌机      更新时间：2023-10-16

我正在尝试做一个blender插件(免费3d程序)这个插件是一个python插件，我将把数据传递给c++来做大量的计算

在python中的方法是这样的:

data.as_pointer()
#.. method:: as_pointer()
#Returns the memory address which holds a pointer to blenders internal data
#:return: int (memory address).
#:rtype: int
#.. note:: This is intended only for advanced script writers who need to
#pass blender data to their own C/Python modules.

我读取的数据是一个列表

>>>>data[0].as_pointer()
152884792
>>>>data[1].as_pointer()
152884992
>>>>data[2].as_pointer()
152885192

等等因此条目大小为200字节，结构为未知

如何在c++中读取这些数据

你必须知道格式。一旦你这样做，你可能会创建一个struct，并将该指针类型转换为struct类型并读取它。

编辑:我相信blender有一个API。

我到目前为止做了什么，以及它是如何很好地确定哪些数据是哪些，+比较数据与python内部数据

c++代码:

unsigned int p = imported_data; /*mypointer address*/
float* value_float;
unsigned int* value_int;
double* value_double;
char* value_char;
bool* value_bool;
for (int looper = 0;looper <200;looper +=4)
{
    value_float = reinterpret_cast<float *>(p + looper);
    if(*value_float != 0.0f){
        printf("%i value_float = %fn", looper, *value_float);
        continue;
    }
    value_int = reinterpret_cast<unsigned int *>(p + looper);
    if(*value_int != 0){
        printf("%i value_int = %un", looper, *value_int);
        continue;
    }
    value_double = reinterpret_cast<double *>(p + looper);
    if(*value_double != 0.0){
        printf("%i value_double = %fn", looper, *value_double);
        continue;
    }
    value_char = reinterpret_cast<char *>(p + looper);
    if(*value_char != NULL){
        printf("%i value_char = %cn", looper, *value_char);
        continue;
    }
    value_bool = reinterpret_cast<bool *>(p + looper);
    if(*value_bool != 0){
        printf("%i value_char = %in", looper, *value_bool);
        continue;
    }
}

，结果如下:

0 value_float = 2.784583
4 value_float = 2.088116
8 value_float = -3.057968
16 value_double = -15656.531250
20 value_float = -6.455599
24 value_float = 1.000000
48 value_double = 134217728.000000
52 value_float = 20.000000
56 value_float = 2.784583
60 value_float = 2.088116
64 value_float = -2.807592
72 value_double = -9227.453125
76 value_float = -6.063199
80 value_float = 1.000000
104 value_double = 100663296.000000
108 value_float = 19.000000
136 value_double = 0.007813
140 value_float = 1.000000
144 value_float = 50.000000
148 value_float = 51.000000
152 value_float = 0.000000
156 value_float = -1.#QNAN0
160 value_float = 0.713105
164 value_float = 0.023383
168 value_float = 0.014281
172 value_float = 0.249231
176 value_double = 0.000000
180 value_float = 0.050000
192 value_double = 0.000000
196 value_float = 0.000000
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