polygon_outline()

MAYAFLUX_API std::vector< Kakshya::LineVertex > MayaFlux::Kinesis::polygon_outline	(	glm::vec2	center,
		float	radius,
		uint32_t	sides,
		float	rotation_rad = 0.F,
		glm::vec3	color = glm::vec3(1.F),
		float	thickness = 1.F
	)

Regular n-gon outline as a LINE_LIST (closed loop, 2 * sides vertices).

Parameters

center	Polygon center in NDC.
radius	Circumradius in NDC units.
sides	Side count. Clamped to minimum 3.
rotation_rad	Starting angle in radians from +X axis.
color	Uniform line color.
thickness	Line thickness.

Definition at line 322 of file Geometry2D.cpp.

{
    sides = std::max<uint32_t>(sides, k_min_sides);
    const float step = glm::two_pi<float>() / static_cast<float>(sides);
 
    std::vector<Kakshya::LineVertex> out;
    out.reserve((size_t)sides * 2);
 
    for (uint32_t i = 0; i < sides; ++i) {
        const float a0 = rotation_rad + static_cast<float>(i) * step;
        const float a1 = rotation_rad + static_cast<float>((i + 1) % sides) * step;
        out.push_back(lvert2(ring_point(center, radius, a0), color, thickness));
        out.push_back(lvert2(ring_point(center, radius, a1), color, thickness));
    }
 
    return out;
}