From 1a15d307a64918f144cccc47e183148b67690afa Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Tue, 10 Sep 2019 14:01:58 +0800
Subject: [PATCH] add floor_stand

---
 examples/floor_stand.scad | 172 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 examples/floor_stand.scad

diff --git a/examples/floor_stand.scad b/examples/floor_stand.scad
new file mode 100644
index 00000000..835366d5
--- /dev/null
+++ b/examples/floor_stand.scad
@@ -0,0 +1,172 @@
+include <util/sub_str.scad>;
+include <util/split_str.scad>;
+include <multi_line_text.scad>;
+
+text = "Coder at Work";
+font = "Arial Black";
+font_size = 6;
+line_spacing = 10;
+
+stand_width = 40;
+stand_height = 80;
+stand_thickness = 4;
+joint_spacing = 1;
+
+module floor_stand(text, font, font_size, width, height, thickness, joint_spacing, line_spacing) {
+    half_w = width / 2;
+    half_h = height / 2;
+    half_th = thickness / 2;
+    half_sc = joint_spacing / 2;
+
+    $fn = 24;
+
+    points = [
+        [half_w, -half_h], [width / 2.25, half_h], 
+        [-width / 2.25, half_h], [-half_w, -half_h]
+    ];
+
+    module board_base() {
+        difference() {
+            polygon(points);
+            translate([0, -half_h, 0]) 
+                scale([0.6, 0.1]) 
+                    polygon(points);
+        }
+    }
+
+    module word() {
+        color("black")
+        translate([0, 0, half_th]) 
+            linear_extrude(half_th / 2) 
+                union() {
+                    difference() {
+                        scale([0.85, 0.7]) 
+                            polygon(points);
+                        offset(r = -font_size / 4) 
+                            scale([0.85, 0.7]) 
+                                polygon(points);
+                    }
+                    multi_line_text(
+                        split_str(text, " "),
+                        font = font,
+                        size = font_size,
+                        line_spacing = line_spacing,    
+                        valign = "center", 
+                        halign = "center"
+                    );
+                }
+    }
+
+    module joint_top() {
+        linear_extrude(thickness / 4 + half_sc, scale = 0.1) 
+            circle(thickness / 4 + half_sc);
+    }
+
+    module stick() {
+        linear_extrude(thickness * 0.75) 
+            square([width / 12, half_w], center = true);    
+    }
+    
+    module slot_df() {
+        translate([0, -half_h - thickness, -half_th]) 
+            stick();    
+    }
+
+    module board1() {
+        difference() {
+            union() {
+                linear_extrude(thickness, center = true) 
+                    difference() {
+                        translate([0, -half_h, 0]) 
+                            board_base();
+                        square([width / 1.5, height / 3], center = true);
+                    }
+                rotate([0, 90, 0]) 
+                    linear_extrude(width / 2.25 * 2, center = true) 
+                        circle(thickness / 2);
+            }
+            rotate([0, 90, 0]) 
+                linear_extrude(width / 1.5, center = true) 
+                    circle(thickness, $fn = 24);
+                
+            // joint            
+            translate([half_w / 1.5 , 0, 0])         
+                rotate([0, 90, 0]) 
+                    joint_top();
+
+            translate([-half_w / 1.5 , 0, 0])  
+                rotate([0, -90, 0]) 
+                    joint_top();
+                        
+            slot_df();        
+        }
+    }
+
+    module board2() {
+        difference() {
+            union() {
+                linear_extrude(thickness, center = true) 
+                    union() {
+                        difference() {
+                            translate([0, -half_h, 0]) 
+                                board_base();
+                            square([width, height / 3], center = true);
+                            
+
+                        }
+                        translate([0, -height / 12 - joint_spacing / 4, 0]) 
+                            difference() {
+                                square([width / 1.5 - joint_spacing, height / 6 + joint_spacing / 2], center = true);
+                                square([width / 1.5 - thickness * 2, height / 6], center = true);
+                            }
+                    }
+                rotate([0, 90, 0]) 
+                    linear_extrude(width / 1.5 - joint_spacing, center = true) 
+                        circle(half_th, $fn = 24);
+
+                // joint
+                translate([half_w / 1.5 - half_sc, 0, 0]) 
+                    rotate([0, 90, 0]) 
+                        joint_top();
+
+                translate([-half_w / 1.5 + half_sc, 0, 0]) 
+                    rotate([0, -90, 0]) 
+                        joint_top();                
+            }
+            
+            slot_df();
+        }
+    }
+
+    module ground_df() {
+        translate([0, 0, -height - half_th]) 
+                linear_extrude(thickness) 
+                    square(width, center = true);
+    }
+
+    // stick
+    translate([width, 0, 0]) 
+        stick();
+
+    translate([0, 0, thickness / 2]) 
+    rotate([-80, 0, 0]) 
+    difference() {
+        rotate([80, 0, 0]) union() {
+            color("yellow") board1();
+            translate([0, -height / 1.8, 0]) word();
+        }
+        ground_df();
+    }
+
+    translate([0, 0, thickness / 2]) 
+    rotate([80, 0, 0]) 
+    difference() {
+        rotate([-80, 0, 0]) rotate(180) union() {
+            color("yellow") board2();
+            translate([0, -height / 1.8, 0]) word();
+        }
+        ground_df();
+    }
+}
+
+floor_stand(text, font, font_size, stand_width, stand_height, stand_thickness, joint_spacing, line_spacing);
\ No newline at end of file