add mesh creation (WIP)

GDP/D3D9/Mesh.cpp

@@ -1,5 +1,6 @@
 #include "Mesh.h"
 #include "Utilities.h"
+#include "Vertex.h"
 
 UINT Mesh::init(IDirect3DDevice9* pD3DDevice)
 {
@@ -30,6 +31,21 @@ void Mesh::deInit()
 
 UINT Mesh::createVertexBuffer(IDirect3DDevice9* pD3DDevice)
 {
+    // 1. define mesh structure
+    _vertexCount = 3;
+    _vertexStride = sizeof(Vertex);
+
+    // 2. create vertex buffer WITHOUT data
+    HRESULT hr = pD3DDevice->CreateVertexBuffer(
+        _vertexCount * _vertexStride, // vertex buffer byte length
+        D3DUSAGE_WRITEONLY, // vertex buffer access mode
+        FVF, // FVF - Flexible Vertex Format
+        D3DPOOL_MANAGED, // video memory management
+        &_pVertexBuffer,
+        nullptr // not used anymore
+    );
+
+    // 3. fill vertex buffer with data
     return 0;
 }