source: GTP/trunk/App/Demos/Illum/EnvMap/Cube.cpp @ 1488

#include "dxstdafx.h"
#include "Cube.h"

#define D3DFVF_CUSTOMVERTEX                     (D3DFVF_XYZ|D3DFVF_NORMAL|D3DFVF_TEX1)

struct Vertex
{
        float x, y, z;
        float nx, ny, nz;
        float tu, tv;
};

Cube::Cube(IDirect3DDevice9* pd3dDevice)
{
        this->pd3dDevice = pd3dDevice;
        
        //pVertexBuffer

        int vertexCnt = 24;
        float s = 1;    // igazából mindegy a méret, mert csak a kocka skálázódik vele
        
        Vertex g_quadVertices[] =
        {
                // 1 lap = 2 háromszögbõl álló triangle_strip
                // lapok körüljárási irányának megváltoztatása: a középsõ 2 vertex felcserélésével

                //x  y  z        normal         texcoord
                {-s, s, s,   0,0,-1,    0,0 },
                {-s,-s, s,   0,0,-1,    0,1 },
                { s, s, s,   0,0,-1,    1,0 },
                { s,-s, s,   0,0,-1,    1,1 },

                // z érték -1-szeres + 2. és 3. vertex cseréje
                {-s, s, -s,   0,0,1,    0,0 },
                { s, s, -s,   0,0,1,    1,0 },
                {-s,-s, -s,   0,0,1,    0,1 },
                { s,-s, -s,   0,0,1,    1,1 },

                // y,z csere
                {-s,-s, s,    0,1,0,    0,0 },
                {-s,-s, -s,   0,1,0,    0,1 },
                { s,-s, s,    0,1,0,    1,0 },
                { s,-s, -s,   0,1,0,    1,1 },

                {-s, s, s,   0,-1,0,    0,0 },
                { s, s, s,   0,-1,0,    1,0 },
                {-s, s,-s,   0,-1,0,    0,1 },
                { s, s,-s,   0,-1,0,    1,1 },

                // x,z csere
                {-s, s,-s,    1,0,0,    0,0 },
                {-s,-s,-s,    1,0,0,    0,1 },
                {-s, s, s,    1,0,0,    1,0 },
                {-s,-s, s,    1,0,0,    1,1 },

                { s, s, -s,  -1,0,0,    0,0 },
                { s, s,  s,  -1,0,0,    1,0 },
                { s,-s, -s,  -1,0,0,    0,1 },
                { s,-s,  s,  -1,0,0,    1,1 },
        };

        pd3dDevice->CreateVertexBuffer( vertexCnt*sizeof(Vertex), D3DUSAGE_WRITEONLY, 
                                                                        D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, 
                                                                        &pVertexBuffer, NULL );
        void *pVertices = NULL;

        pVertexBuffer->Lock( 0, sizeof(g_quadVertices), (void**)&pVertices, 0 );
        memcpy( pVertices, g_quadVertices, sizeof(g_quadVertices) );
        pVertexBuffer->Unlock();
}

void Cube::Destroy() {
        SAFE_RELEASE( pVertexBuffer );
}

void Cube::PrepareDrawing()
{
        pd3dDevice->SetStreamSource( 0, pVertexBuffer, 0, sizeof(Vertex) );
        pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );
}

void Cube::DrawFace(int index)
{
        pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 4*index, 2 ); // startVertex, primitiveCnt
}

void Cube::Draw()
{
        for (int index = 0; index < 6; index++)
                pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 4*index, 2 ); // startVertex, primitiveCnt
}