The frustum denotes the truncated pyramid shape representing the visible area in a perspective projection. The frustum effect describes the visual distortion where objects at the edges of the screen or viewport appear stretched or skewed. It adds depth along the z-axis to project a 2D image as 3D.
To apply the frustum effect to a widget:
Go to the Effects tab and add the frustum effect.
Define the dimensions of the image (here we have taken an image of size 500 x 100): width (x coordinate) ranges from 0 to 500, and height (y coordinate) ranges from 0 to 100.
Specify Z-Near (the nearest visible point on the Z-axis, set to 1) and Z-Far (the farthest visible point on the Z-axis, set to 3).
Next, incorporate translate and rotate effects:
Add the translate effect to the widget. Set X-translate to -250 (half the width of the image, negated) and Y-translate to -50 (half the height of the image, negated). To ensure visibility, set Z-translate to -1, aligning with the Z-Near value.
Add a rotate effect to the widget. Set the rotation angle around the X-axis to 50 degrees.