/Printer/DustFilter.foocad

import static uk.co.nickthecoder.foocad.chamferedextrude.v1.ChamferedExtrude.*

/**
    Clip this to filament just before it enters the printer to prevent dust
    being drawn into the hot end, where it may cause blockages, or mar the print.

    I'm not 100% happy with the clip, the hinge works fine.

    At some point I should probably make some reusable extensions for common
    tasks such as hinges and clips! At which point, this should be reworked
    to use them.

    NOTE. On my Genius printer, this would fowl the extrusion gear, so you
    should also print the GeniusFilamanetGuide.
*/
class DustFilter : Model {
    
    var holeD = 4

    @Custom
    var width = 20

    @Custom
    var height = 30
 
    @Custom
    var thickness = 1.2 // Used to be 0.8

    var claspThickness = 1.8

    var slack = 0.8

    fun halfHeight() = width * 0.6

    fun hinge() : Shape3d {
        val sides = 30
        val r = halfHeight()/2
        val middle = Cylinder( height/2, r-1 ).sides(sides).center() +
            Cylinder( height - thickness*2 - slack*2, r*0.4 ).sides(sides).center() +
            Cube( r * 2, r, height/2 ).mirrorY().translateX(-r/2).centerZ()

        val end = (
            Cylinder( height/4 - slack, r-1 ).sides(sides) -
            Cylinder( height/4-thickness, r*0.4 + slack).sides(sides).translateZ(-slack) +
            Cube( r * 2, r/2, height/4 -slack).mirrorX()
                .translateX(r/2)
                .translateY(-halfHeight()/2)
        ) .translateZ(height/4+slack)

        return (middle + end.mirrorZ().also()).rotateX(90).toOriginZ() // Cube( 1, 100, 100 ).center()
    }
    
    fun hookAndBarb() : Shape3d {
        val hook = PolygonBuilder().apply {
            moveTo(-1,-1)
            lineTo(1,1)
            lineTo(1,2)
            lineTo(1.5,3)
            lineTo(1.5,4)
            lineTo(0,6)
            lineTo(0,2)
            //lineTo(0,5)
        }.build().extrude( 8 )
            .rotateX(90)
            .centerY()        
            .translateX(width+halfHeight()/2)            
            .translateZ(halfHeight()/2-2)
    
        val h = halfHeight()/2+3
        val barb1 = PolygonBuilder().apply {
            radius(0.5)
            moveTo(-4,0)
            lineTo(2.5,0) // This is a week point
            lineTo(2.5,1)
            radius(0.0)
            lineTo(1,h)
            lineTo(0,h)
            radius(0.5)
            lineTo(0,1)
            radius(0)
            lineTo(-4,1)
        }.build().extrude( 16 )
            .rotateX(90)
            .centerY()
        val barb = (barb1 - Cube( 6,9,4 ).centerXY().translateZ(2))
            .translateX(width+halfHeight()/2+0.6)            

        return hook.color("Blue") + barb.color("Orange").mirrorX()
    }
    
    fun profile( width : double ) : Shape2d {
        return Circle( width / 2 ) / Square( width*1.1, width*0.6 ).center()
    }

    override fun build() : Shape3d {
        val half = (
            profile( width ).chamferedExtrude( height, 1 ).center().rotateX(90) -
            Cube( width*2, height*1.1, width ).centerXY()
        ).toOriginZ()

        val minus = (
            profile( width-thickness*2 ).chamferedExtrude( height - thickness*2, 1 ).center() +
            Cylinder( height*1.2, holeD/2 ).sides(6).center()
        ).rotateX(90).toOriginZ().translateZ(thickness)

        val result = half.translateX( width/2+halfHeight()/2 ).mirrorX().also() + hinge() -
            minus.translateX( width/2+halfHeight()/2 ).mirrorX().also() +    
            hookAndBarb()


        return result // Cube( 1, 100, 100 ).center()
    }
}