From 00756bee24fda4dc0be568bdda10522e1e74be43 Mon Sep 17 00:00:00 2001
From: Justin Lin <justin.sdk@gmail.com>
Date: Sun, 28 Feb 2021 10:34:56 +0800
Subject: [PATCH] add theta_maze

---
 examples/maze/theta_maze.scad | 54 +++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 examples/maze/theta_maze.scad

diff --git a/examples/maze/theta_maze.scad b/examples/maze/theta_maze.scad
new file mode 100644
index 00000000..96be35e5
--- /dev/null
+++ b/examples/maze/theta_maze.scad
@@ -0,0 +1,54 @@
+use <maze/mz_theta_cells.scad>;
+use <maze/mz_theta_get.scad>;
+use <hull_polyline2d.scad>;
+
+rows = 16;
+begining_columns = 8;
+divided_ratio = 1.5;
+cell_width = 10;
+wall_thickness = 2;
+wall_height = 5;
+
+theta_maze(rows, begining_columns, divided_ratio, cell_width, wall_thickness, wall_height);
+
+module theta_maze(rows, begining_columns, divided_ratio, cell_width, wall_thickness, wall_height) {
+
+	function vt_from_angle(theta, r) = [r * cos(theta), r * sin(theta)];
+
+	maze = mz_theta_cells(rows, begining_columns, divided_ratio);
+
+	linear_extrude(wall_height) {
+		for(rows = maze) {
+			for(cell = rows) {
+				ri = mz_theta_get(cell, "r");
+				ci = mz_theta_get(cell, "c");
+				wallType = mz_theta_get(cell, "t");
+				thetaStep = 360 / len(maze[ri]);
+				innerR = (ri + 1) * cell_width;
+				outerR = (ri + 2) * cell_width;
+				theta1 = thetaStep * ci;
+				theta2 = thetaStep * (ci + 1);
+				
+				innerVt1 = vt_from_angle(theta1, innerR);
+				innerVt2 = vt_from_angle(theta2, innerR);
+				outerVt2 = vt_from_angle(theta2, outerR);
+				
+				if(wallType == "INWARD_WALL" || wallType == "INWARD_CCW_WALL") {
+					hull_polyline2d([innerVt1, innerVt2], width = wall_thickness);
+				}
+
+				if(wallType == "CCW_WALL" || wallType == "INWARD_CCW_WALL") {
+					hull_polyline2d([innerVt2, outerVt2], width = wall_thickness);
+				}
+			} 
+		}
+		
+		thetaStep = 360 / len(maze[rows - 1]);
+		r = cell_width * (rows + 1);
+		for(theta = [0:thetaStep:360 - thetaStep]) {
+			vt1 = vt_from_angle(theta, r);
+			vt2 = vt_from_angle(theta + thetaStep, r);
+			hull_polyline2d([vt1, vt2], width = wall_thickness);
+		} 
+	}
+}
\ No newline at end of file