{"id":13678,"date":"2024-10-19T13:07:52","date_gmt":"2024-10-19T17:07:52","guid":{"rendered":"https:\/\/www.sceneri.com\/?post_type=sceneri-docs-glossar&p=13678"},"modified":"2024-11-12T03:51:43","modified_gmt":"2024-11-12T08:51:43","slug":"convex","status":"publish","type":"sceneri-docs-glossar","link":"https:\/\/www.sceneri.com\/sceneri-docs-glossar\/convex\/","title":{"rendered":"Convex"},"content":{"rendered":"
\n

Overview<\/h3>\n

In computer graphics, a convex polygon is a polygon in which all of the interior angles are less than or equal to 180 degrees. This means that a convex polygon can be drawn without crossing itself.<\/span><\/p>\n<\/div>\n

\n

Here are some examples of convex polygons:<\/span><\/p>\n<\/div>\n

\n
    \n
  • \n
    A triangle: <\/strong><\/span>A triangle is always a convex polygon. This is because the sum of the angles in a triangle must be 180 degrees, and if any angle is greater than 180 degrees, then the sum of the angles would be greater than 180 degrees.<\/span><\/div>\n<\/li>\n
  • \n
    A square: <\/strong><\/span>A square is also a convex polygon. This is because the sum of the angles in a square is 360 degrees, and no angle in a square is greater than 180 degrees.<\/span><\/div>\n<\/li>\n
  • \n
    A pentagon: <\/strong><\/span>A pentagon is a convex polygon if and only if none of its interior angles measures more than 180 degrees.<\/span><\/div>\n<\/li>\n<\/ul>\n<\/div>\n
    \n

    Here are some of the benefits of using convex polygons in computer graphics:<\/span><\/p>\n<\/div>\n

    \n
      \n
    • \n
      They can be more easily rendered:<\/strong><\/span> Convex polygons can be more easily rendered than concave polygons because they have fewer edges and vertices. This is because each edge and vertex must be calculated individually when rendering a convex polygon.<\/span><\/div>\n<\/li>\n
    • \n
      They can be more easily tesselated:<\/strong><\/span> Tessellation is the process of dividing a polygon into smaller polygons, and convex polygons can be more easily tesselated than concave polygons. This is because the smaller polygons can be created in a way that preserves the convex shape of the original polygon.<\/span><\/div>\n<\/li>\n
    • \n
      They can be more easily used in collision detection:<\/strong><\/span> Collision detection is the process of determining whether two objects have collided. Convex polygons are easier to use in collision detection than concave polygons because the boundaries of convex polygons are simpler to define.<\/span><\/div>\n<\/li>\n<\/ul>\n<\/div>\n
      \n

      Here are some of the drawbacks of using convex polygons in computer graphics:<\/span><\/p>\n<\/div>\n

      \n
        \n
      • \n
        They can be less efficient for rendering some types of objects: <\/strong><\/span>Convex polygons can be less efficient for rendering some types of objects, such as objects with curved surfaces. This is because convex polygons cannot represent curved surfaces as accurately as concave polygons.<\/span><\/div>\n<\/li>\n
      • \n
        They can be less efficient for collision detection: <\/strong><\/span>Convex polygons can be less efficient for collision detection for objects with many convex polygons. This is because the collision detection algorithm must check for collisions between all of the convex polygons in the object.<\/span><\/div>\n<\/li>\n
      • \n
        They can be less efficient for tessellation: <\/strong><\/span>Convex polygons can be less efficient for tessellation for objects with many convex polygons. This is because the tessellation algorithm must divide each convex polygon into smaller polygons.<\/span><\/div>\n<\/li>\n<\/ul>\n<\/div>\n
        \n

        Overall, convex polygons offer a number of benefits, but they can also have some drawbacks. It is important to consider the needs of your application when deciding whether or not to use convex polygons.<\/span><\/p>\n<\/div>\n

        \n

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