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2014/10/15 ¤U¤È 10:16:04
iphone Programming Glossary: y21iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew may need a transpose function compute_transform_matrix X Y W H x1a y1a x2a y2a x3a y3a x4a y4a var y21 y2a y1a y32 y3a y2a y43 y4a y3a y14 y1a y4a y31 y3a y1a y42 y4a y2a var a H x2a x3a y14 x2a x4a y31.. y42 y4a y2a var a H x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 var b W x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 var c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a.. y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W Y x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 var d H x4a y21 y3a x2a y1a y43 x1a y2a y43 x3a y1a y4a x3a y2a y4a var e W..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d rect.origin.x CGFloat Y rect.origin.y CGFloat W rect.size.width CGFloat H rect.size.height CGFloat y21 y2a y1a CGFloat y32 y3a y2a CGFloat y43 y4a y3a CGFloat y14 y1a y4a CGFloat y31 y3a y1a CGFloat y42.. y2a CGFloat a H x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 CGFloat b W x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 CGFloat c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32.. y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W Y x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 CGFloat d H x4a y21 y3a x2a y1a y43 x1a y2a y43 x3a y1a y4a x3a y2a y4a CGFloat..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew x1a y1a x2a y2a x3a y3a x4a y4a use this function you may need a transpose function compute_transform_matrix X Y W H x1a y1a x2a y2a x3a y3a x4a y4a var y21 y2a y1a y32 y3a y2a y43 y4a y3a y14 y1a y4a y31 y3a y1a y42 y4a y2a var a H x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 var b W x2a x3a y14 x3a x4a y21 x1a.. y21 y2a y1a y32 y3a y2a y43 y4a y3a y14 y1a y4a y31 y3a y1a y42 y4a y2a var a H x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 var b W x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 var c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W Y x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a.. x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 var c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W Y x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 var d H x4a y21 y3a x2a y1a y43 x1a y2a y43 x3a y1a y4a x3a y2a y4a var e W x4a y2a y31 x3a y1a y42 x2a y31 y4a x1a y3a y42 var f W x4a..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d y3a quadBRX CGFloat x4a quadBRY CGFloat y4a CGFloat X rect.origin.x CGFloat Y rect.origin.y CGFloat W rect.size.width CGFloat H rect.size.height CGFloat y21 y2a y1a CGFloat y32 y3a y2a CGFloat y43 y4a y3a CGFloat y14 y1a y4a CGFloat y31 y3a y1a CGFloat y42 y4a y2a CGFloat a H x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a.. y3a CGFloat y14 y1a y4a CGFloat y31 y3a y1a CGFloat y42 y4a y2a CGFloat a H x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 CGFloat b W x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 CGFloat c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W Y x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a.. y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 CGFloat c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W Y x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 CGFloat d H x4a y21 y3a x2a y1a y43 x1a y2a y43 x3a y1a y4a x3a y2a y4a CGFloat e W x4a y2a y31 x3a y1a y42 x2a y31 y4a x1a y3a y42 CGFloat..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew this function you may need a transpose function compute_transform_matrix X Y W H x1a y1a x2a y2a x3a y3a x4a y4a var y21 y2a y1a y32 y3a y2a y43 y4a y3a y14 y1a y4a y31 y3a y1a y42 y4a y2a var a H x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a.. y1a y4a y31 y3a y1a y42 y4a y2a var a H x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 var b W x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 var c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W Y x2a.. y43 var c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W Y x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 var d H x4a y21 y3a x2a y1a y43 x1a y2a y43 x3a y1a y4a x3a y2a y4a var e W x4a y2a y31 x3a y1a..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d y4a CGFloat X rect.origin.x CGFloat Y rect.origin.y CGFloat W rect.size.width CGFloat H rect.size.height CGFloat y21 y2a y1a CGFloat y32 y3a y2a CGFloat y43 y4a y3a CGFloat y14 y1a y4a CGFloat y31 y3a y1a CGFloat y42 y4a y2a CGFloat a H.. y1a CGFloat y42 y4a y2a CGFloat a H x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 CGFloat b W x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 CGFloat c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W.. CGFloat c H X x2a x3a y14 x2a x4a y31 x1a x4a y32 x1a x3a y42 H W x1a x4a y32 x3a y42 x2a y43 W Y x2a x3a y14 x3a x4a y21 x1a x4a y32 x1a x2a y43 CGFloat d H x4a y21 y3a x2a y1a y43 x1a y2a y43 x3a y1a y4a x3a y2a y4a CGFloat e W x4a y2a y31..
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