unit_square()

std::function< glm::vec2(glm::vec2)> MayaFlux::Kinesis::unit_square ( AABB2D  bounds, const std::function< glm::vec2()> &  live_offset = {}  )

inlinenoexcept

Unit-square coordinates of a point within bounds.

Inverse to position_picker, which maps [0,1]² onto the region.

Parameters

bounds	Region in NDC.
live_offset	Optional. Current translation of the drawn control.

Returns

Callable producing a value in [0, 1]².

Definition at line 76 of file Projection.hpp.

                                                                       {}) noexcept
{
    const glm::vec2 origin = bounds.min;
    const glm::vec2 extent { bounds.width(), bounds.height() };
 
    return [origin, extent, live_offset](glm::vec2 p) -> glm::vec2 {
        if (extent.x <= 0.F || extent.y <= 0.F)
            return glm::vec2(0.F);
        const glm::vec2 shift = live_offset ? live_offset() : glm::vec2(0.F);
        return glm::clamp((p - shift - origin) / extent, glm::vec2(0.F), glm::vec2(1.F));
    };
}

Referenced by MayaFlux::Portal::Forma::ColorPicker::place(), and MayaFlux::Portal::Forma::Geometry::position_picker().

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