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Perform the cross product on two vectors. In 2D this produces a scalar.

You can modify this to use your logging facility.

Multiply a matrix times a vector. If a rotation matrix is provided, then this transforms the vector from one frame to another.

Perform the dot product on two vectors.

* Record the value of a field in the * internal directory structure. The * field will be written to the file * when/if the directory structure is

This function is called whenever there is a non-fatal error. This function * should not be changed. If there is a need to handle warnings different

bits <= 32 */

Takes only up to 32 bits. */

Free a pointer allocated by png_malloc(). If ptr is NULL, return * without taking any action. */

Optionally skip data and then check the CRC. Depending on whether we * are reading an ancillary or critical chunk, and how the program has set * th

Set this vector to all zeros.

* Return the value of a field in the * internal directory structure. */

4-point pre for boundaries **/

Set using an angle in radians.

extract upto 32bit from input stream

Retrieve a copy of the element at given index position in the array. * \param pIndex Position of element in the array. * \return The value of the el

Divide an integer and round upwards @return Returns a divided by b */

Add a key-value pair as an element. * \param pKey The new key. * \param pValue The new value. */

Note: type mismatch is silently cast */ TODO: check this */

Note: type mismatch is silently cast */ TODO: check this */

muldiv functions */ This API takes signed arguments and rounds the result to the nearest * integer (or, for a fixed point number - the standard argum

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