KStg/top.kkoishi.stg.gfx/Texture/rotate

rotate

fun rotate(radian: Double): Texture.TextureOp

Returns a TextureOp that can be used to rotate the texture.

The matrix representing the returned texture operation is:

    [   cos(radian)    -sin(radian)     width-width*cos+height*sin  ]
    [   sin(radian)     cos(radian)    height-width*sin-height*cos  ]
    [       0               0                      1                ]
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Return

a transform that can be used to rotate the texture.

Parameters

radian

the angle of rotation measured in radians.