smgui/docs/en/lines.md

Lines

Polyline

Draws a series of anti-aliased lines. form->ptr must point to an array of int16_t (short int) values, multiple x and y pairs, and the last pair must be 0,0.

Parameter	Description
form->type	UI_LINES
form->ptr	Pointer to the int16_t array
form->value	32 bit RGBA color

Horizontal Connect

Connects two points horizontally with a curve. form->ptr must point to an array of exactly 4 int16_t values, x0 and y0 starting point, x1 and y1 end point pair.

Parameter	Description
form->type	UI_HCONNECT
form->ptr	Pointer to int16_t array with 4 elements
form->value	32 bit RGBA color

Vertical Connect

Connects two points vertically with a curve. form->ptr must point to an array of exactly 4 int16_t values, x0 and y0 starting point, x1 and y1 end point pair.

Parameter	Description
form->type	UI_VCONNECT
form->ptr	Pointer to int16_t array with 4 elements
form->value	32 bit RGBA color

Bezier Curve

Draws an arbitrary Bezier curve. form->ptr must point to an array of exactly 8 int16_t values, x0 and y0 starting point, x1 and y1 end point, cx0 and cy0 first control point, cx1 and cy1 second control point's coordinate pair.

Parameter	Description
form->type	UI_CURVE
form->ptr	Pointer to int16_t array with 8 elements
form->value	32 bit RGBA color