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processes input received from any keyboard-like input system. Accepts input parameter in the form of camera defined ENUM (to abstract it from windowin

activate the shader ------------------------------------------------------------------------

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returns the view matrix calculated using Euler Angles and the LookAt Matrix

processes input received from a mouse input system. Expects the offset value in both the x and y direction.

processes input received from a mouse scroll-wheel event. Only requires input on the vertical wheel-axis

take a -128..127 value and clamp it and convert to 0..255

utility function for loading a 2D texture from file ---------------------------------------------------

see https://gdbooks.gitbooks.io/3dcollisions/content/Chapter2/static_aabb_plane.html

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take a -128..127 value and stbi__clamp it and convert to 0..255

returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow

Returns a pointer to the underlying zero-terminated array of characters */

Helper Functions *********/

if there's a pending marker from the entropy stream, return that otherwise, fetch from the stream and get a marker. if there's no marker, return 0xff,

if there's a pending marker from the entropy stream, return that otherwise, fetch from the stream and get a marker. if there's no marker, return 0xff,

returns 1 if the product is valid, 0 on overflow. negative factors are considered invalid.

resets the ball to initial Stuck Position (if ball is outside window bounds)

utility function for loading a 2D texture from file ---------------------------------------------------

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decode a jpeg huffman value from the bitstream

after a restart interval, stbi__jpeg_reset the entropy decoder and the dc prediction

initialize a callback-based context