如何弄湿DerectX 9中的左上角坐标？

本文介绍了如何弄湿DerectX 9中的左上角坐标？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

你好!! 我需要在DirectX 9中绘制一些东西。 我有兴趣以坐标的方式工作将被调整为像素，而（0,0）将是 TopLeft 角。以下是我的工作：

Hello!! I need to draw something in DirectX 9. I am interested to work in a way that the coordinates will be adjusted to pixels, while (0,0) will be the TopLeft corner. Here is what I do:

RECT clientRect; ::GetClientRect(m_hWIN, &clientRect); D3DXMATRIX matOrtho2D, matIdentity; D3DXMatrixOrthoOffCenterLH(&matOrtho2D, 0, clientRect.right, 0, clientRect.bottom, 0.0f, 1.0f); D3DXMatrixIdentity(&matIdentity); g_pDirect3D_Device->SetTransform(D3DTS_PROJECTION, &matOrtho2D); g_pDirect3D_Device->SetTransform(D3DTS_WORLD, &matIdentity); g_pDirect3D_Device->SetTransform(D3DTS_VIEW, &matIdentity);

这个工作正常，除了（0,0） ）是 BottomLeft 一角。如何更改它？ 谢谢！

This works fine, except the (0,0) is the BottomLeft corner. How can I change it? Thanks!

推荐答案

DirectX使用图像左侧的底部作为其原点，如这里 [ ^ ]。 DirectX uses the bottome left of the image as its origin, as described here[^].

这应添加到代码： This should be added to the code: D3DXMatrixTranslation(&matTranslate, 0, (float)clientRect.bottom, 0.0f); D3DXMatrixRotationX(&matFlip, D3DXToRadian(180)); D3DXMATRIX matCoordTransform = matFlip * matTranslate; g_pDirect3D_Device->SetTransform(D3DTS_WORLD, &matCoordTransform);