Common mathematical functions used by GUI. More...

Functions
uint8_t	gui_math_sqrt (float x, float *const result)
	Calculate square of input value. More...

uint8_t	gui_math_rsqrt (float x, float *const result)
	Calculate reverse square of input value. More...

uint8_t	gui_math_distancebetweenxy (float x1, float y1, float x2, float y2, float *const result)
	Calculate distance between 2 XY points. More...

uint8_t	gui_math_centerofxy (float x1, float y1, float x2, float y2, float const resultx, float const resulty)
	Calculate center XY coordinate between 2 XY points. More...

Detailed Description

Common mathematical functions used by GUI.

Function Documentation

Calculate center XY coordinate between 2 XY points.

\(\ c_x=\frac{x_1+x_2}{2}\)

\(\ c_y=\frac{y_1+y_2}{2}\)

Parameters

[in]	x1	X position of point 1
[in]	y1	Y position of point 1
[in]	x2	X position of point 2
[in]	y2	Y position of point 2
[out]	resultx	Pointer to float variable to store result about X position to
[out]	resulty	Pointer to float variable to store result about Y position to

uint8_t gui_math_distancebetweenxy	(	float	x1,
		float	y1,
		float	x2,
		float	y2,
		float *const	result
	)

Calculate distance between 2 XY points.

\(\ y=sqrt{((x_1-x_2)^2+(y_1-y_2)^2)}\)

Parameters

[in]	x1	X position of point 1
[in]	y1	Y position of point 1
[in]	x2	X position of point 2
[in]	y2	Y position of point 2
[out]	result	Pointer to float variable to store result to

Calculate reverse square of input value.

\(\ y=\frac{1}{sqrt{(x)}}\)

Parameters

[in]	x	Number to calculate reverse square from
[out]	result	Pointer to float variable to store result to

Calculate square of input value.

\(\ y=sqrt{(x)}\)

Parameters

[in]	x	Number to calculate square from
[out]	result	Pointer to float variable to store result to