waterguage.scad

// Pocket Rain Gauge - Customizable SCAD Model
// Based on 1" (25.4 mm) height with internal domed bottom for support-free printing
// Updated: Longer stake (50 mm) with dull point oriented downward for ground insertion

// Customizable Parameters
inner_diameter = 20;          // Inner diameter of the cylinder (mm)
inner_height = 25.4;          // Total inner height from dome bottom to top (1 inch in mm)
dome_radius = 10;              // Radius of the internal hemispherical dome (mm, keep <= inner_diameter/2)
wall_thickness = 2;         // Wall thickness (mm)
spike_height = 50;            // Height of the bottom stake (mm) - for stability
spike_tip_diameter = 4;       // Diameter at the stake's tip (mm) - for a "dull" point
lip_height = 0;               // Height of the top lip/flange (mm)
lip_outer_diameter = 0;      // Outer diameter of the top lip (mm)
resolution = 100;             // Curve resolution ($fn)

// Calculated Values (don't edit these)
outer_diameter = inner_diameter + 2 * wall_thickness;
straight_inner_height = inner_height - dome_radius;  // Height of straight cylinder above dome
total_height = straight_inner_height + dome_radius + lip_height;  // Total height without stake

// Main Module
module rain_gauge() {
    union() {
        // Outer body: Cylinder with top lip (shifted up by stake height)
        translate([0, 0, spike_height]) {  
            // Main outer cylinder
            cylinder(h = total_height, d = outer_diameter, $fn = resolution);
            
            // Top lip/flange
            translate([0, 0, total_height - lip_height]) {
                cylinder(h = lip_height, d = lip_outer_diameter, $fn = resolution);
            }
        }
        
        // Bottom stake (cone with dull point downward)
        cylinder(h = spike_height, d1 = spike_tip_diameter, d2 = outer_diameter, $fn = resolution);
    }
}

// Inner Cavity (to subtract for hollowing)
module inner_cavity() {
    // Straight inner cylinder
    translate([0, 0, spike_height + dome_radius]) {
        cylinder(h = straight_inner_height + lip_height + 0.1, d = inner_diameter, $fn = resolution);  // +0.1 for clean subtraction
    }
    
    // Domed bottom (hemisphere)
    translate([0, 0, spike_height + dome_radius]) {
        sphere(r = dome_radius, $fn = resolution);
    }
}

// Final Model: Outer body minus inner cavity
difference() {
    rain_gauge();
    inner_cavity();
}