Bounding.Box

Bounding Box

Cited Official
https://en.wikibooks.org/wiki/OpenGL_Programming/Bounding_box

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OpenGL Programming/Bounding box

Conception

We analyze the object:

• Minimum coordinates in X, Y and Z

• Maximum coordinates in X, Y and Z

• We compute the size necessary for the object: max-min in X, Y and Z

• We compute the center of the object: (min+max)/2 in X, Y and Z

We compute of cube around the object:

• We prepare a cube of size 1 (1x1x1), centered on the origin

• We scale it by the size of the object

• We center it on the object

To draw the cube:

• We draw the front face using 1 looping line

• We draw the back face using 1 looping line

• We draw 4 orthogonal lines to join both faces

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