arc_path()

MAYAFLUX_API std::vector< glm::vec2 > MayaFlux::Kinesis::arc_path	(	glm::vec2	center,
		float	radius_x,
		float	radius_y,
		float	angle_start,
		float	angle_end,
		uint32_t	segments
	)

Sample a circular arc as ordered NDC positions.

Produces segments + 1 points along the arc from angle_start to angle_end, suitable as path input to stroke_slider or any other function consuming a span<const glm::vec2> path.

Parameters

center	Arc center in NDC.
radius_x	Horizontal radius in NDC units.
radius_y	Vertical radius in NDC units (use == radius_x for a circle).
angle_start	Start angle in radians from +X, CCW.
angle_end	End angle in radians from +X, CCW.
segments	Number of segments; produces segments+1 points.

Definition at line 203 of file Geometry2D.cpp.

{
    segments = std::max<uint32_t>(segments, 1U);
    const float step = (angle_end - angle_start) / static_cast<float>(segments);
 
    std::vector<glm::vec2> out;
    out.reserve(static_cast<size_t>(segments) + 1);
    for (uint32_t i = 0; i <= segments; ++i) {
        const float a = angle_start + static_cast<float>(i) * step;
        out.push_back(center + glm::vec2(radius_x * std::cos(a), radius_y * std::sin(a)));
    }
    return out;
}

References a.