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//! [0]
x' = m11*x + m21*y + dx
y' = m22*y + m12*x + dy
if is not affine:
w' = m13*x + m23*y + m33
x' /= w'
y' /= w'
//! [0]
//! [1]
x' = m11*x + m21*y + dx
y' = m22*y + m12*x + dy
if is not affine:
w' = m13*x + m23*y + m33
x' /= w'
y' /= w'
//! [1]
//! [2]
x' = m11*x + m21*y + dx
y' = m22*y + m12*x + dy
if is not affine:
w' = m13*x + m23*y + m33
x' /= w'
y' /= w'
//! [2]
//! [3]
x' = m11*x + m21*y + dx
y' = m22*y + m12*x + dy
if is not affine:
w' = m13*x + m23*y + m33
x' /= w'
y' /= w'
//! [3]
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