Mapping of mouse coordinates to Global coordinates
How to convert the 2D coordinates of mouse to 3D coordinates of real objects in the world space? As you know the mouse has two coordinates of x and y on the screen, but we want to select a 3-dimensional point, member, or object in the world space.
In this post, I will show you, we can do it by a series of transformations a 3-dimensional coordinate of a world space object can be converted to the 2-dimensional coordinate of mouse or screen space.
I will show you how we can convert a 3-dimensional point to a 2-dimensional point on the screen using a numerical example and apply it to the code of a graphical program. Also, I will discuss world space, eye space, Homogenous and clip space, as well as Viewport or screen space, along with view matrix, projection matrix and perspective matrix.
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