D3D渲染的顶点数量有上限？？

[xychzh]

我写了个专门的测试程序用来批量渲染上万个顶点，结果是渲染1~30000个顶点都正常，一当我改成60000个顶点的时候，就崩溃了。
是D3D有顶点上限还是？

附代码：

#define TEXTURE_COUNT		5000
#define VERTEX_COUNT		TEXTURE_COUNT*6

void CRender::RenderExample()
{
	if (m_pTexture != NULL)
	{
		UINT startTime = timeGetTime();

		if (1)
		{
			for (int i=0, x=0, y=0; i<TEXTURE_COUNT; i++)
			{
				x = rand() % SCREEN_WIDTH;
				y = rand() % SCREEN_HEIGHT;
				RenderObj(m_pTexture, x, y, m_Width, m_Height);
			}
		}
		else
		{
			SVertex2D vertexData[VERTEX_COUNT];
			memset(vertexData, 0, sizeof(vertexData));

			for (int i=0, x=0, y=0; i<VERTEX_COUNT; i+=6)
			{
				x = rand() % SCREEN_WIDTH;
				y = rand() % SCREEN_HEIGHT;

				vertexData[i].x = x;
				vertexData[i].y = y;
				vertexData[i].rhw = 1;
				vertexData[i].color = 0xffffffff;
				vertexData[i].tu = 0;
				vertexData[i].tv = 0;

				vertexData[i+1].x = x+m_Width;
				vertexData[i+1].y = y;
				vertexData[i+1].rhw = 1;
				vertexData[i+1].color = 0xffffffff;
				vertexData[i+1].tu = 1;
				vertexData[i+1].tv = 0;

				vertexData[i+2].x = x+m_Width;
				vertexData[i+2].y = y+m_Height;
				vertexData[i+2].rhw = 1;
				vertexData[i+2].color = 0xffffffff;
				vertexData[i+2].tu = 1;
				vertexData[i+2].tv = 1;

				vertexData[i+3].x = x+m_Width;
				vertexData[i+3].y = y+m_Height;
				vertexData[i+3].rhw = 1;
				vertexData[i+3].color = 0xffffffff;
				vertexData[i+3].tu = 1;
				vertexData[i+3].tv = 1;

				vertexData[i+4].x = x;
				vertexData[i+4].y = y+m_Height;
				vertexData[i+4].rhw = 1;
				vertexData[i+4].color = 0xffffffff;
				vertexData[i+4].tu = 0;
				vertexData[i+4].tv = 1;

				vertexData[i+5].x = x;
				vertexData[i+5].y = y;
				vertexData[i+5].rhw = 1;
				vertexData[i+5].color = 0xffffffff;
				vertexData[i+5].tu = 0;
				vertexData[i+5].tv = 0;			
			}

			m_pD3DDevice->SetTexture(0, m_pTexture);
			m_pD3DDevice->DrawPrimitiveUP(D3DPT_TRIANGLELIST, VERTEX_COUNT/3, vertexData, sizeof(SVertex2D));
		}

		char szTime[32];
		sprintf(szTime, "耗时:%d", timeGetTime()-startTime);
		MessageBox(0, szTime, 0, MB_OK);
	}
}

[xychzh]

ok，3Q

[IONPhantom]

VB IB 都有上限, Texture 尺寸也有,不同版本的D3D限制不一样,具体看对应版本 SDK 的说明

[visualvisual]

可以使用：
D3DCAPS9 d3dcaps;
IDirect3D9::GetDeviceCaps(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,&d3dcaps);
查询相关信息。

其中
d3dcaps.MaxVertexIndex和d3dcaps.MaxPrimitiveCount就是楼主想要的信息。