vertical_fader()

MAYAFLUX_API Form< float > MayaFlux::Portal::Forma::Geometry::vertical_fader	(	Kinesis::AABB2D	bounds,
		float	handle_h,
		glm::vec3	track_color = glm::vec3(0.3F),
		glm::vec3	handle_color = glm::vec3(0.9F)
	)

Geometry function for a vertical fader in NDC space.

Parameters

bounds	Full extent of the fader in NDC.
handle_h	Handle height in NDC units.
track_color	Track quad color.
handle_color	Handle quad color.

Definition at line 39 of file FormFactory.cpp.

{
    GeometryFn<float> fn = [bounds, handle_h, track_color, handle_color](
                               float v, std::vector<uint8_t>& out, Element& el) {
        const float y = bounds.min.y + v * (bounds.height() - handle_h);
        const float xl = bounds.min.x + bounds.width() * 0.35F;
        const float xr = bounds.min.x + bounds.width() * 0.65F;
 
        const Kinesis::AABB2D track { .min = { xl, bounds.min.y }, .max = { xr, bounds.max.y } };
        const Kinesis::AABB2D handle { .min = { bounds.min.x, y }, .max = { bounds.max.x, y + handle_h } };
 
        auto verts = Kakshya::to_mesh_vertices(Kinesis::filled_rect(track, track_color));
        auto herts = Kakshya::to_mesh_vertices(Kinesis::filled_rect(handle, handle_color));
        verts.insert(verts.end(), herts.begin(), herts.end());
 
        write_verts(out, verts);
 
        el.bounds_hint = handle;
        el.contains = {};
    };
 
    return { std::move(fn),
        Graphics::PrimitiveTopology::TRIANGLE_STRIP,
        static_cast<size_t>(8) * sizeof(Kakshya::MeshVertex),
        drag_with<float>(Kinesis::axis_fraction(bounds, handle_h, false)) };
}

References MayaFlux::Kinesis::axis_fraction(), 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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