filled_ring()

MAYAFLUX_API std::vector< Kakshya::Vertex > MayaFlux::Kinesis::filled_ring	(	glm::vec2	center,
		float	inner_r,
		float	outer_r,
		uint32_t	segments,
		glm::vec3	color = glm::vec3(1.F)
	)

Filled annulus (ring) as a TRIANGLE_LIST quad strip.

Produces two triangles per angular segment between inner_r and outer_r. Minimum segments is 3.

Parameters

center	Ring center in NDC.
inner_r	Inner radius in NDC units.
outer_r	Outer radius in NDC units.
segments	Quad count around the circumference.
color	Uniform fill color.

Definition at line 58 of file Geometry2D.cpp.

{
    segments = std::max<uint32_t>(segments, k_min_segments);
    const float step = glm::two_pi<float>() / static_cast<float>(segments);
 
    std::vector<Kakshya::Vertex> out;
    out.reserve(static_cast<size_t>(segments) * 6);
 
    for (uint32_t i = 0; i < segments; ++i) {
        const float a0 = static_cast<float>(i) * step;
        const float a1 = static_cast<float>(i + 1) * step;
 
        const glm::vec2 oi0 = ring_point(center, inner_r, a0);
        const glm::vec2 oo0 = ring_point(center, outer_r, a0);
        const glm::vec2 oi1 = ring_point(center, inner_r, a1);
        const glm::vec2 oo1 = ring_point(center, outer_r, a1);
 
        out.push_back(vert2(oi0, color));
        out.push_back(vert2(oo0, color));
        out.push_back(vert2(oo1, color));
 
        out.push_back(vert2(oi0, color));
        out.push_back(vert2(oo1, color));
        out.push_back(vert2(oi1, color));
    }
 
    return out;
}