?? modifyworldtransform.htm
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<title>ModifyWorldTransform</title>
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<td width="100%" height="16"><a name="ModifyWorldTransform">ModifyWorldTransform</a></td>
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<td width="102%" colspan="3">VB聲明</td>
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<td width="102%" colspan="3">Declare Function ModifyWorldTransform Lib "gdi32"
Alias "ModifyWorldTransform" (ByVal hdc As Long, lpXform As xform, ByVal iMode
As Long) As Long</td>
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<td width="102%" colspan="3">說明</td>
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<td width="102%" colspan="3">根據指定的模式修改世界轉換</td>
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<td width="102%" colspan="3">返回值</td>
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<td width="102%" colspan="3">Long,執行成功為非零值,失敗為0</td>
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<td width="102%" colspan="3">參數表</td>
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<td width="25%">參數</td>
<td width="77%" colspan="2">類型及說明</td>
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<td width="25%">hdc</td>
<td width="77%" colspan="2">Long,設備場景,其世界坐標將被修改</td>
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<td width="25%">lpXform</td>
<td width="77%" colspan="2"><a href="XFORM.htm">xform</a>,這個結構內含根據iMode參數附加的轉換</td>
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<td width="25%" rowspan="4">iMode</td>
<td width="77%" colspan="2">Long,下列常數之一:</td>
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<td width="37%">MWT_IDENTITY</td>
<td width="38%">設置世界轉換為默認的特性轉換(用該特性轉換時,世界轉換無效),忽略lpXform參數</td>
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<td width="37%">MWT_LEFTMULTIPLY</td>
<td width="38%">lpXform轉換被當前轉換乘,乘積設為新的世界轉換</td>
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<td width="37%">MWT_RIGHTMULTIPLY</td>
<td width="38%">當前轉換被lpXform轉換乘,乘積設為新的世界轉換</td>
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<td width="102%" colspan="3">注解</td>
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<td width="102%" colspan="3"><p align="left">與一般的乘法不同,矩陣乘法的結果與矩陣順序有關。在MWT_LEFTMULTIPLY模式,lpXform為左邊的操作數。請參考高等代數相關書籍。<br>
調用本函數前先應調用<a href="SetGraphicsMode.htm">SetGraphicsMode</a>函數設置GM_ADVANCED圖形模式</td>
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<td width="102%" colspan="3">適用平臺</td>
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<td width="102%" colspan="3">Windows NT</td>
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