lighttroupe/luz

require 'user_object_setting'

class UserObjectSettingSlider < UserObjectSetting
    attr_accessor :slider, :is_inverted, :input_min, :input_max, :dead_center_size, :output_min, :output_max, :output_curve

    def to_yaml_properties
        super + ['@slider', '@is_inverted', '@input_min', '@input_max', '@dead_center_size', '@output_min', '@output_max', '@output_curve']
    end

    def after_load
        @output_curve ||= $engine.project.curves.first
        set_default_instance_variables(:input_min => 0.0, :input_max => 1.0, :output_min => 0.0, :output_max => 1.0, :dead_center_size => 0.0)
        super
    end

    NON_NOTIFY_SLIDER_NAME_REGEXES = [/^Mouse /, /^Wiimote /, /^Tablet /, /^Spectrum Analyzer /]

    def immediate_value
        @last_value = @current_value

        # Get raw value, as reported by physical input (MIDI slider, mouse x/y, joystick axis, etc.)
        v = $engine.slider_value(@slider)

        # Invert for:
        # - devices axis that just feel upside down (that's why it's done first)
        v = 1.0 - v if @is_inverted

        # Re-scale input for:
        # - devices that never reach 0.0 or 1.0
        # - using only part of the input range eg 0.5 to 1.0

        if @input_min >= @input_max        # some sanity for kooky settings and avoids possible divide by 0.0 below when ==
            v = @input_min
        else
            v = v.clamp(@input_min, @input_max)

            # rescale it to 0.0..1.0
            v = (v - @input_min) / (@input_max - @input_min)

            # no--- NOTE: v can be outside 0.0..1.0 here if eg. min>max are kooky
        end

        # Dead-center for:
        # - axis that are hard to leave exactly at 0.5 but shouldn't be (eg. MIDI crossfader, gamepad analog stick X/Y)
        if @dead_center_size > 0.0
            half_center_width = (@dead_center_size / 2.0)
            ramp_width = (0.5 - half_center_width)

            if v < ramp_width
                # Left of three parts
                v = (v / ramp_width) * 0.5
            elsif (v > (0.5 + half_center_width))
                # Right of three parts
                v = 0.5 + (((v - 0.5 - half_center_width) / ramp_width) * 0.5)
            else
                v = 0.5
            end
        end

        v = @output_curve.value(v) if @output_curve

        # Scale to output range
        v = v.scale(@output_min, @output_max)

        @current_value = v
        v
    end

    def summary
        summary_format(@slider)
    end
end