level_meter()

MAYAFLUX_API Form< float > MayaFlux::Portal::Forma::Geometry::level_meter	(	Kinesis::AABB2D	bounds,
		bool	horizontal = true,
		glm::vec3	fill_color = glm::vec3(0.2F, 0.7F, 0.3F),
		glm::vec3	track_color = glm::vec3(0.15F)
	)

Geometry function for a level meter in NDC space.

No interaction. Drive from a node via bridge().at(el.state).bind(node).

Parameters

bounds	Full extent of the meter in NDC.
horizontal	True for left-to-right fill, false for bottom-to-top.
fill_color	Color of the active (filled) portion.
track_color	Color of the inactive remainder.

Definition at line 273 of file FormFactory.cpp.

{
    GeometryFn<float> fn = [bounds, horizontal, fill_color, track_color](
                               float v, std::vector<uint8_t>& out, Element& el) {
        const float t = std::clamp(v, 0.F, 1.F);
 
        Kinesis::AABB2D fill {}, remainder {};
        if (horizontal) {
            const float split = bounds.min.x + t * bounds.width();
            fill = { .min = bounds.min, .max = { split, bounds.max.y } };
            remainder = { .min = { split, bounds.min.y }, .max = bounds.max };
        } else {
            const float split = bounds.min.y + t * bounds.height();
            fill = { .min = bounds.min, .max = { bounds.max.x, split } };
            remainder = { .min = { bounds.min.x, split }, .max = bounds.max };
        }
 
        auto verts = Kakshya::to_mesh_vertices(Kinesis::filled_rect(fill, fill_color));
        auto rest = Kakshya::to_mesh_vertices(Kinesis::filled_rect(remainder, track_color));
        verts.insert(verts.end(), rest.begin(), rest.end());
 
        write_verts(out, verts);
 
        el.bounds_hint = bounds;
        el.contains = {};
    };
 
    return { std::move(fn),
        Graphics::PrimitiveTopology::TRIANGLE_STRIP,
        static_cast<size_t>(8) * sizeof(Kakshya::MeshVertex) };
}

References MayaFlux::Kinesis::AABB2D::contains(), MayaFlux::Kinesis::filled_rect(), MayaFlux::Kinesis::AABB2D::height(), MayaFlux::Kinesis::AABB2D::max, MayaFlux::Kinesis::AABB2D::min, MayaFlux::Kakshya::to_mesh_vertices(), MayaFlux::Portal::Graphics::TRIANGLE_STRIP, MayaFlux::Kinesis::AABB2D::width(), and write_verts().

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