inlinecpp how to pass an array of Vector3 to an inlinecpp script?

[bergermon]

Hi

I cannot figure out how to pass an array of vector3 (or array of quaternions or matrices) to my inlinecpp. I know there is something like "geo.setPointFloatAttribValuesFromString("P", positions)" but i dont have Points yet in my Operator. I do know how to pass a single Vector or an Array of Integers. If anyone has an example on how to do this, thank you

this one is using numpy and is not working:

import inlinecpp
import numpy as np
import ctypes

Cpp_lib = inlinecpp.createLibrary("Arrayexample",
includes="""
#include <hboost\iostreams\detail\iostream.hpp>
#include <SYS/SYS_Types.h>
#include <UT/UT_Vector3.h>
#include <UT/UT_Storage.h>
""",
function_sources=["""
void vecArray(UT_Vector3D * vec, int l)
{ 
    for(int i=0; i < l ; ++i)
        std::cout << (*vec)[i] << std::endl;   
}
"""])
v0 = hou.Vector3(0.5, 0.2, 0.3)
v1 = hou.Vector3(1.5, 2.2, 3.3)
v2 = hou.Vector3(2.5, 3.2, 4.4)
myVectorArray = np.array([v0, v1, v2])

Cpp_lib.vecArray( myVectorArray.ctypes.data , len(myVectorArray))

this is working:

import inlinecpp
cpp_lib = inlinecpp.createLibrary("example",
includes="""
#include <hboost\iostreams\detail\iostream.hpp>
#include <SYS/SYS_Types.h>
#include <UT/UT_Vector3.h>
#include <UT/UT_Storage.h>
""",
function_sources=["""
void saysomething2(UT_Vector3D * vec)
{ 
    for(int i=0; i < 3 ; ++i)
        std::cout << (*vec)[i] << std::endl;   
}
"""])
v = hou.Vector3(0.5, 0.2, 0.3)
cpp_lib.saysomething2(v)

this one is using the array module and is working, but how could I define a custom type (hou.Vector3) in the array module?

import array
import inlinecpp
example_lib = inlinecpp.createLibrary("example_lib",
    function_sources=["""
inlinecpp::BinaryString build_int_array()
{
    std::vector<int> values(10);
    for (int i=0; i<10; ++i)
        values[i] = i;
    return inlinecpp::as_binary_string(values);
}
"""])

data = example_lib.build_int_array()
int_array = array.array("i", data)
for value in int_array:
    print value

 

Edited May 1, 2020 by bergermon

[bergermon]

sorry, did not want to bump this thread, here is my answer to my own question, to pass hou.vector3 to an inlinecpp operator: I can use a struct

import inlinecpp
import numpy as np

Cpp_lib = inlinecpp.createLibrary("Arrayexample",
includes="""
#include <iostream>
""",
structs=[("Pos3D", (
    ("x", "d"),
    ("y", "d"),
    ("z", "d"),
))],

function_sources=["""
void vecArray(Pos3D * Pos3DArray, int length)
{ 
    for ( int i = 0; i < length; i++)
    {
        std::cout << (Pos3DArray+i)->x   << " " << (Pos3DArray + i)->y << " " << (Pos3DArray + i)->z << std::endl;
    }
}
"""])
v0 = hou.Vector3(0.5, 0.2, 0.3)
v1 = hou.Vector3(1.5, 2.2, 3.3)
v2 = hou.Vector3(2.5, 3.2, 4.4)
VectorArray = np.array([v0, v1, v2], dtype='double')
Cpp_lib.vecArray( VectorArray.ctypes.data , len(VectorArray))

 

Edited May 1, 2020 by bergermon
wrong code