dragon

examples/dragon/dragon.scad

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+use <dragon_head.scad>;
+use <dragon_scales.scad>;
+use <bezier_curve.scad>;
+use <shear.scad>;
+use <along_with.scad>;
+use <hull_polyline3d.scad>;
+use <bezier_smooth.scad>;
+use <dragon_claw.scad>;
+
+function __angy_angz(p1, p2) = 
+    let(
+        dx = p2[0] - p1[0],
+        dy = p2[1] - p1[1],
+        dz = p2[2] - p1[2],
+        ya = atan2(dz, sqrt(pow(dx, 2) + pow(dy, 2))),
+        za = atan2(dy, dx)
+    ) [ya, za];
+
+
+module one_segment(body_r, body_fn, one_scale_data) {
+    // scales
+    rotate([-90, 0, 0])
+        dragon_body_scales(body_r, body_fn, one_scale_data);
+
+    // dorsal fin
+    translate([0, 4, -3]) 
+    rotate([-65, 0, 0]) 
+    shear(sy = [0, 3])
+    linear_extrude(2.25, scale = 0.2)
+        square([2, 12], center = true);            
+            
+    // belly    
+    translate([0, -2.5, .8]) 
+    rotate([-5, 0, 0]) 
+    scale([1, 1, 1.4])  
+        sphere(body_r * 0.966, $fn = 8); 
+    
+}
+
+module tail() {
+    $fn = 4;
+    scale([1,0.85, 1]) union() {
+        tail_scales(75, 2.5, 4.25, -4, 1.25);
+        tail_scales(100, 1.25, 4.5, -7, 1);
+        tail_scales(110, 1.25, 3, -9, 1);
+        tail_scales(120, 2.5, 2, -9, 1);   
+    }
+}
+
+module foot() {
+    pts = [[.5, 1, 10], [1.25, 6.25, 11.25], [2, 11.5, 12.5], [2, 16.75, 13.75], [1.9, 20, 14.25]];
+    pts2 = [[2, 22, 14],  [3.5, 21, 10], [4.5, 20.3, 6.5]];
+
+    one_body_scale_data1 = one_body_scale(body_r * 0.6, 6, scale_fn, scale_tilt_a);
+    one_body_scale_data2 = one_body_scale(body_r * 0.45, 6, scale_fn, scale_tilt_a);
+
+    along_with(pts, scale = 0.75, method = "EULER_ANGLE") 
+        rotate([-90, 0, 0])
+            dragon_body_scales(body_r * 0.6, 6, one_body_scale_data1);
+    along_with(pts2, scale = 0.6, method = "EULER_ANGLE") 
+        rotate([-90, 0, 0])
+            dragon_body_scales(body_r * 0.5, 6, one_body_scale_data2);
+    
+    translate([2.25, 14.5, 12.75])
+    scale([0.7, 1.15, .8])
+    rotate([107, 9, 1])
+        tail();
+
+    translate([6, 19.25, 0])
+    rotate([10, 10, 185])
+    scale([1.1, 1.1, 1.2])
+        dragon_claw();
+}
+
+x1 = 30;
+x2 = 30;
+x3 = 0;
+x4 = 0;
+
+t_step = 0.02;
+
+p0 = [0, 0, 0];
+p1 = [0, 50, 35];
+p2 = [-50, 70, 0];
+p3 = [x1, 90, -15];
+p4 = [x2, 150, -20];
+p5 = [x3, 160, -3];
+p6 = [x4, 180, 10];
+
+path_pts = bezier_curve(t_step, 
+    [p0, p1, p2, p3, p4, p5, p6]
+);
+
+scale(1.1)
+    dragon_head(__angy_angz(path_pts[0], path_pts[1]));
+
+body_r = 6;
+body_fn = 12;
+scale_fn = 4;
+scale_tilt_a = 6;
+one_body_scale_data = one_body_scale(body_r, body_fn, scale_fn, scale_tilt_a);
+
+along_with(path_pts, scale = 0.6, method = "EULER_ANGLE")    
+    one_segment(body_r, body_fn, one_body_scale_data);
+
+ayz = __angy_angz(path_pts[len(path_pts) - 2], path_pts[len(path_pts) - 1]);
+
+translate(path_pts[len(path_pts) - 1])
+rotate([0, ayz[0] + 25, ayz[1]])
+mirror([0, 0, 1])
+rotate(-12)
+scale(0.775)
+    tail();
+
+translate([-2, 30, 3]) 
+rotate(-15) 
+    foot();
+
+translate([-7.5, 20, 10]) 
+rotate([-60, 45, 25]) 
+mirror([1, 0, 0])
+    foot();
+
+translate([9, 120, -17]) 
+rotate([10, 20, -60]) 
+scale(0.8)
+    foot();
+
+translate([9, 125, -14]) 
+rotate([20, 20, 30]) 
+rotate([10, -60, 0]) 
+scale(0.8)
+mirror([1, 0, 0])
+    foot();