[英]Run-Time Check Failure #2 - Stack around the variable 'c2d' was corrupted. with c++
[英]C++ Stack around the variable '' was corrupted. (D3D9)
我知道有很多類似的問題,但是在這個特定問題上看不到任何問題。 該代碼在Release模式下運行良好,但是給我“變量'indices'周圍的堆棧已損壞”。 在調試模式下編譯時。 我該如何解決? 提前致謝!
這是帶有問題的代碼:
// Create Saturn rings
// create the vertices using the CUSTOMVERTEX struct
#define num_vertices 1000
CUSTOMVERTEX vertices[num_vertices];
nSections = 150;
float outerRadius = (80000000 + escalaa[6]) / escalaa[6];
float innerRadius = (7000000 + escalaa[6]) / escalaa[6];
float endAngle = ToRadians(360);
float beginAngle = ToRadians(0);
float angle = endAngle - beginAngle;
for (unsigned int i = 0; i <= nSections; i+=2)
{
float t = (float)i / (float)nSections;
float theta = beginAngle + t * angle;
float s = (float)sin(theta);
float c = (float)cos(theta);
vertices[i] = { c * innerRadius, 0, -1 * (s * innerRadius), { 0.0f, 1.0f, 0.0f }, 4, 2 };
vertices[i + 1] = { c * outerRadius, 0, -1 * (s * outerRadius), { 0.0f, 1.0f, 0.0f }, 2, 4 };
}
// create a vertex buffer interface called v_buffer
d3ddev->CreateVertexBuffer(num_vertices* sizeof(CUSTOMVERTEX),
0,
CUSTOMFVF,
D3DPOOL_MANAGED,
&v_buffer,
NULL);
VOID* pVoid; // a void pointer
// lock v_buffer and load the vertices into it
v_buffer->Lock(0, 0, (void**)&pVoid, 0);
memcpy(pVoid, vertices, sizeof(vertices));
v_buffer->Unlock();
// create the indices using an int array
short indices[num_vertices];
int aa=0;
for (int n = 0; n < num_vertices; n += 6)
{
indices[n] = aa;
indices[n + 1] = aa + 1;
indices[n + 2] = aa + 2;
indices[n + 3] = aa + 2;
indices[n + 4] = aa + 1;
indices[n + 5] = aa + 3;
aa += 2;
}
// create an index buffer interface called i_buffer
d3ddev->CreateIndexBuffer(3 * num_vertices* sizeof(short),
0,
D3DFMT_INDEX16,
D3DPOOL_MANAGED,
&i_buffer,
NULL);
// lock i_buffer and load the indices into it
i_buffer->Lock(0, 0, (void**)&pVoid, 0);
memcpy(pVoid, indices, sizeof(indices));
i_buffer->Unlock();
此循環中斷:
for (int n = 0; n < num_vertices; n += 6)
{
indices[n] = aa;
indices[n + 1] = aa + 1;
indices[n + 2] = aa + 2;
indices[n + 3] = aa + 2;
indices[n + 4] = aa + 1;
indices[n + 5] = aa + 3;
aa += 2;
}
您需要測試(n + 5) < num_vertices
。 最終, n
將為996,小於num_vertices
(1000),因此循環將繼續運行,但是996 + 4為1000,超出了數組范圍。 因此,當n
達到996時,對indices[n + 4]
(及以后)的讀取或寫入是未定義的行為,對其進行寫入似乎正在破壞堆棧。
請注意,以這種方式更改循環條件將導致indices[996]
到indices[999]
未被初始化! 這意味着您對d3ddev->CreateIndexBuffer()
調用可能會觸發對未初始化對象的讀取, 這也是未定義的行為。 您可以考慮將num_vertices
重新定義為6的倍數,以避免出現此問題。
請注意,未定義的行為可能導致任何行為, 包括程序“運行良好”或至少看起來確實如此。
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