Method Cairo.Context()->rel_curve_to()

Method rel_curve_to

void rel_curve_to(float|int dx1, float|int dy1, float|int dx2, float|int dy2, float|int dx3, float|int dy3)

Description

Relative-coordinate version of curve_to(). All offsets are relative to the current point. Adds a cubic Bézier spline to the path from the current point to a point offset from the current point by (dx3, dy3), using points offset by (dx1, dy1) and (dx2, dy2) as the control points. After this call the current point will be offset by (dx3, dy3).

Given a current point of (x, y), rel_curve_to(dx1, dy1, dx2, dy2, dx3, dy3) is logically equivalent to curve_to(x+dx1, y+dy1, x+dx2, y+dy2, x+dx3, y+dy3).

It is an error to call this function with no current point.

Parameter dx1

the X offset to the first control point

Parameter dy1

the Y offset to the first control point

Parameter dx2

the X offset to the second control point

Parameter dy2

the Y offset to the second control point

Parameter dx3

the X offset to the end of the curve

Parameter dy3

the Y offset to the end of the curve