Affine Transformations in 2D

See instructions below.

• To add a shape to the affine plane on the right, click the green plus sign in the Shape column on the left. Then choose from the new drop-down list that was inserted which shape you want to use.
• To remove a shape, click its name and choose the last option in the list, “(remove this).”
• To add an affine transformation to a newly inserted shape, click the green plus sign in the Transformations column. New transformations are always added to the left of other transformations. The rightmost transformation is applied first.
• To remove an affine transformation, click it, and when the blue box appears, click Delete.
• To edit an affine transformation, click it, and use the blue editing box that appears.
  • Choose T for translate, S for scale, and R for rotate.
  • After choosing T, S, or R, fill in the values below, which appear as subscripts on the transformation.
    If the type is T, the x and y values are the components of the translation vector.
    If the type is R, the angle value is how much to rotate, in degrees.
  • Click Close when finished editing, or just click the same transformation again.