/*I had to perform some reconstructive surgery after the copy and paste.Next time post code in source tags.*/void main(){ Vec3D *vList; unsigned int vertexCount; FillInList( &vList, &vertex_count ); // Don''t forget to clean up vList when you''re done with it. for(unsigned int i=0; i < vertexCount; ++1) { cout << "Vertex X =" << vList[i].x << " Y = " << vList[i].y /* etc */ << endl; delete vList[i]; } delete [] vList; }void FillInList( Vec3D ** vList, unsigned int * vxCount ){ std::list<Vec3D> tmpVertices; /* Do stuff with tmpVerticies */ *vxCount = tmpVerticies.size(); (*vList) = new Vec3D*[*vxCount]; std::list<Vec3D>::iterator itr = tmpVertices.begin(); // std::copy would be usefull here, but I don''t feel like doing the grunt work. for(int i = 0; itr != tmpVertices.end(); ++itr, ++i ) { // We want vList to contain copies of what''s in the list. // Vec3D better have a copy constructor! (*vList)[i] = new Vec3D(*itr); } // Redundant - tmpVerticies (and it''s contents) will be destroyed when the function exits. //tmpVertices.clear();} Pass pointer array by reference - Pointer Problem
Oops. Misplaced *
/*I had to perform some reconstructive surgery after the copy and paste.Next time post code in source tags.*/void main(){ Vec3D *vList; unsigned int vertexCount; FillInList( &vList, &vertex_count ); // Don''t forget to clean up vList when you''re done with it. for(unsigned int i=0; i < vertexCount; ++1) { cout << "Vertex X =" << vList[i].x << " Y = " << vList[i].y /* etc */ << endl; delete vList[i]; } delete [] vList; }void FillInList( Vec3D ** vList, unsigned int * vxCount ){ std::list<Vec3D> tmpVertices; /* Do stuff with tmpVerticies */ *vxCount = tmpVerticies.size(); (*vList) = new Vec3D[*vxCount]; std::list<Vec3D>::iterator itr = tmpVertices.begin(); // std::copy would be usefull here, but I don''t feel like doing the grunt work. for(int i = 0; itr != tmpVertices.end(); ++itr, ++i ) { // We want vList to contain copies of what''s in the list. // Vec3D better have a copy constructor! (*vList)[i] = new Vec3D(*itr); } // Redundant - tmpVerticies (and it''s contents) will be destroyed when the function exits. //tmpVertices.clear();}
Here is a utility function for you. Should make things easier for you.
This could easily be templatised.
[edited by - petewood on March 30, 2004 10:28:23 AM]
void makeVec3DArrayFromVec3DList(Vec3D*& array, int& size, const std::list<Vec3D>& cont) { Vec3D* newArray = new Vec3D[cont.size()]; std::copy(cont.begin(), cont.end(), newArray); array = newArray; size = cont.size();}This could easily be templatised.
[edited by - petewood on March 30, 2004 10:28:23 AM]
Petewood;
The array is an array of pointers. That is why I didn''t use std::copy.
Incidentally, the line where you print out the contests in my source should be vList->x not vList.x </i>
The array is an array of pointers. That is why I didn''t use std::copy.
Incidentally, the line where you print out the contests in my source should be vList->x not vList.x </i>
Author
Thanks Anonymous Poster. this is exactly what I needed.
I know fo rsome doesnt make sense but this is what I wanted to achieve. Little correction
(*itr) = new V3(*itr); <<<--- this doesnt compile on my machine
I used this instead
*vList = new V3[*vertex_count];
Thank you all!
I know fo rsome doesnt make sense but this is what I wanted to achieve. Little correction
(*itr) = new V3(*itr); <<<--- this doesnt compile on my machine
I used this instead
*vList = new V3[*vertex_count];
Thank you all!
My code is horribly broken anyway.Replace (*vList)[i] = new Vec3D(*itr); with (*vList)[i] = *itr;and remove delete vList[i];This topic is closed to new replies.
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