MATLAB: How to generate orthographic projection/perspective view of 3D object

Question

Say I have a disc-shape in 3D (i.e. it has some thickness to it – but we could also reduce it to a 2D circle).

I want to generate an orthographic projection of the object from an angle – e.g. the mapping onto the plane of the screen in the right-hand picture.

I've tried using 2D and 3D shear transformations followed by a maximum intensity projection, but I'm not sure this really represents what actually happening.

Is there a better way to do this? (sorry for the very open-ended question).

Answer 1

Hi,

Kindly have a look at the following example:

• https://in.mathworks.com/help/map/the-globe-display-compared-with-the-orthographic-projection.html (The Global Display Compared with the Orthographic Projection)

You can try generating various orthographic projection of the object from an angle by making use of Camera View functions:

• https://in.mathworks.com/help/matlab/views.html (Camera Views)

and further getting Transformation matrix.

Following links may be useful:

• https://in.mathworks.com/help/matlab/creating_plots/understanding-view-projections.html (Understanding View Projection)
• https://in.mathworks.com/matlabcentral/answers/283474-how-can-i-create-2d-projections-from-a-3d-object (2D projection from 3D Object)
• https://in.mathworks.com/matlabcentral/fileexchange/21993-viewer3d (Viewer3D)
• https://in.mathworks.com/matlabcentral/answers/12214-orthogonal-projection-of-solid (Orthogonal projection of solid)