filled_polygon()

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

Filled regular n-gon as a TRIANGLE_LIST triangle fan.

Vertices are placed on a circle of radius, starting at rotation_rad from +X, CCW. Minimum sides is 3.

Parameters

center	Polygon center in NDC.
radius	Circumradius in NDC units.
sides	Number of sides. Clamped to minimum 3.
rotation_rad	Starting angle in radians from +X axis.
color	Uniform fill color.

Definition at line 89 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::Vertex> out;
    out.reserve((size_t)sides * 3);
 
    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) * step;
        out.push_back(vert2(center, color));
        out.push_back(vert2(ring_point(center, radius, a0), color));
        out.push_back(vert2(ring_point(center, radius, a1), color));
    }
 
    return out;
}