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D3DPOOL_DEFAULT¿Í D3DUSAGE_WRITEONLY | D3DUSAGE_DYNAMIC Ç÷¡±×·Î
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D3DPOOL_DEFAULT·Î »ý¼ºµÈ ¸®¼Ò½º´Â D3DLOCK_DISCARD¸¦ »ç¿ëÇÏ´Â °ÍÀÌ ¼º´É¿¡ ÁÁ´Ù.

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D3DPOOL_MANAGED¿Í D3DUSAGE_WRITEONLY Ç÷¡±×·Î ¹öÅؽº  (or À妽º)¹öÆÛ¸¦ ¸¸µé°í
NULL·Î ¶ôÀ» ¼³Á¤ÇÑ´Ù.

¹öÀü 1.01¿¡ Ãß°¡µÈ »çÇ×Àº ´ÙÀ½°ú °°´Ù.

¹öÀü 1.00ÀÇ D3DPOOL , Lock ¼³Á¤ Ç÷¡±×ÀÇ ¹ö±×¸¦ ¼öÁ¤ ÇÏ¿´´Ù.
À妽º ¹öÆÛ¸¦ ÇØÁ¦ÇÏÁö ¾Ê°í ÀÖ´ø ¹ö±×µµ ¼öÁ¤ ÇÏ¿´´Ù.
MyVector3¿¡  +=, /, /=, Normalize, Cross ¿¬»êÀÚ¸¦ Ãß°¡ ÇÏ¿´´Ù.

    MyVector3&        operator +=(const MyVector3& v);

    MyVector3         operator /(float t) const;

    MyVector3&        operator /=(float t);

    MyVector3&        Normalize();

    MyVector3&        Cross(const MyVector3& v1, const MyVector3& v2);