struct Vertex
{
float x, y, z;
DWORD color;
};
vector<Vertex> pointList(6);
pointList[0].color = (D3DCOLOR_COLORVALUE( 1.0, 0.0, 0.0, 1.0 ));
pointList[0].x = 0.0f; pointList[0].y = 0.0f; pointList[0].z = 0.0;
pointList[0].color = (D3DCOLOR_COLORVALUE( 0.0, 1.0, 0.0, 1.0 ));
pointList[0].x = 0.5f; pointList[0].y = 0.0f; pointList[0].z = 0.0;
pointList[0].color = (D3DCOLOR_COLORVALUE( 0.0, 0.0, 1.0, 1.0 ));
pointList[0].x = -0.5f; pointList[0].y = 0.0f; pointList[0].z = 0.0;
pointList[0].color = (D3DCOLOR_COLORVALUE( 1.0, 1.0, 0.0, 1.0 ));
pointList[0].x = 0.0f; pointList[0].y = -0.5f; pointList[0].z = 0.0;
pointList[0].color = (D3DCOLOR_COLORVALUE( 0.0, 1.0, 1.0, 1.0 ));
pointList[0].x = 0.0f; pointList[0].y = 0.5f; pointList[0].z = 0.0;
//Now the buffer:
//Here I dont know how to size the buffer corectly acording to the vector size.
LPDIRECT3DVERTEXBUFFER9 g_pPointList_VB = NULL;
Vertex *pVertices = NULL;
MyBuffer.Device->CreateVertexBuffer( 6*sizeof(pointList), 0, D3DFVF_MY_VERTEX,
D3DPOOL_DEFAULT, &g_pPointList_VB, NULL );
pVertices = NULL;
g_pPointList_VB->Lock( 0, sizeof(pointList), (void**)&pVertices, 0 );
memcpy( pVertices, &pointList, sizeof(pointList.size()) );
g_pPointList_VB->Unlock();
Mybuffer is just a LPDIRECT3DVERTEXBUFFER9 buffer;
vector stuff
Author
I want to use a STL vector to fill a buffer with. I change from the normal array to vector but i still dont know how to set up the size of the buffer corectly.
Thnks
Untested:
Σnigma
struct Vertex{ float x, y, z; DWORD color;};vector<Vertex> pointList(6);pointList[0].color = (D3DCOLOR_COLORVALUE( 1.0, 0.0, 0.0, 1.0 ));pointList[0].x = 0.0f; pointList[0].y = 0.0f; pointList[0].z = 0.0;pointList[1].color = (D3DCOLOR_COLORVALUE( 0.0, 1.0, 0.0, 1.0 ));pointList[1].x = 0.5f; pointList[1].y = 0.0f; pointList[1].z = 0.0;pointList[2].color = (D3DCOLOR_COLORVALUE( 0.0, 0.0, 1.0, 1.0 ));pointList[2].x = -0.5f; pointList[2].y = 0.0f; pointList[2].z = 0.0;pointList[3].color = (D3DCOLOR_COLORVALUE( 1.0, 1.0, 0.0, 1.0 ));pointList[3].x = 0.0f; pointList[3].y = -0.5f; pointList[3].z = 0.0;pointList[4].color = (D3DCOLOR_COLORVALUE( 0.0, 1.0, 1.0, 1.0 ));pointList[4].x = 0.0f; pointList[4].y = 0.5f; pointList[4].z = 0.0;// pointList[5]?//Now the buffer://Here I dont know how to size the buffer corectly acording to the vector size.LPDIRECT3DVERTEXBUFFER9 g_pPointList_VB = NULL;Vertex *pVertices = NULL;MyBuffer.Device->CreateVertexBuffer( pointList.size() * sizeof(pointList::value_type), 0, D3DFVF_MY_VERTEX, D3DPOOL_DEFAULT, &g_pPointList_VB, NULL );pVertices = NULL;g_pPointList_VB->Lock( 0, sizeof(pointList::value_type), (void**)&pVertices, 0 );// c++ provides better (i.e. typesafe) functions for copyingstd::copy(pointList.begin(), pointList.end(), pVertices);g_pPointList_VB->Unlock();Σnigma
for a declaration of:
vector<Vertex> pointList
pointList::value_type would return Vertex
it makes life easier, since there is less code to change if you ever change the type in the vector
declaration, you dont have to go changing it everywhere in the code.
vector<Vertex> pointList
pointList::value_type would return Vertex
it makes life easier, since there is less code to change if you ever change the type in the vector
declaration, you dont have to go changing it everywhere in the code.
Author
Quote:Original post by KulSeran
for a declaration of:
vector<Vertex> pointList
pointList::value_type would return Vertex
it makes life easier, since there is less code to change if you ever change the type in the vector
declaration, you dont have to go changing it everywhere in the code.
''unknown-type'': illegal sizeof operand. I cant use pointList::value_type
'value_type' : undeclared identifier
ITS anything im missing ? :(
Sorry, my mistake. I somehow got confused and thought pointList was a typedef as well as a variable. If you had, for example:
It would probably be a good idea for you to introduce such a typedef, but in it's absence you can use it's equivalent std::vector< Vertex >::value_type, or simply Vertex where I'd erroneously put pointList::value_type.
Σnigma
typedef std::vector< Vertex > PointList;PointList pointList;It would probably be a good idea for you to introduce such a typedef, but in it's absence you can use it's equivalent std::vector< Vertex >::value_type, or simply Vertex where I'd erroneously put pointList::value_type.
Σnigma
Author
MyBuffer.Device->CreateVertexBuffer( pointList.size() * sizeof(vector<Vertex >::value_type), 0, D3DFVF_MY_VERTEX,D3DPOOL_DEFAULT, &g_pPointList_VB,NULL);pVertices = NULL;g_pPointList_VB->Lock( 0, sizeof(vector<Vertex>::value_type), (void**)&pVertices, 0 );memcpy( pVertices, &pointList, sizeof(vector<Vertex>::value_type));g_pPointList_VB->Unlock();I still see only one point !! :(
try multiplying all the sizeof(...) by vector.size() for whatever you call your vector
- Do this in the Lock and in the memcpy
[EDIT]
sizeof(vector<Vertex>::value_type) is worthless (you'd better use sizeof(Vertex)) or alternatively typedef vector<Vertex> to something you're comfortable with and use vertexVector::value_type for example.
- Do this in the Lock and in the memcpy
[EDIT]
sizeof(vector<Vertex>::value_type) is worthless (you'd better use sizeof(Vertex)) or alternatively typedef vector<Vertex> to something you're comfortable with and use vertexVector::value_type for example.
Author
Quote:Original post by arithma
try multiplying all the sizeof(...) by vector.size() for whatever you call your vector
- Do this in the Lock and in the memcpy
I did now i dont see anything (not even that litle point it was before)
And btw , thats a strange behavior with VS2005 C++ Pro. If i compile the project I see a dot, then i make some modifications and i dont see anything, when i undo, instead of dot again I dont see anything or i see 3 points instead of one (even with the same code). Is this random bulding ? Sometimes the IDE forgets to build and just runs the last exe ? How can I stop that ?
MyBuffer.Device->CreateVertexBuffer(pointList.size() * sizeof(Vertex), 0, D3DFVF_MY_VERTEX,D3DPOOL_DEFAULT, &g_pPointList_VB,NULL);pVertices = NULL;g_pPointList_VB->Lock( 0,pointList.size() * sizeof(Vertex), (void**)&pVertices, 0 );memcpy( pVertices, &pointList,pointList.size() * sizeof(Vertex) );g_pPointList_VB->Unlock();[Edited by - Azzazelus on January 26, 2007 3:47:55 PM]
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