dotSCAD/docs/lib3x-mz_theta_get.md

mz_theta_get

It's a helper for getting data from a theta-maze cell.

Since: 3.0

Parameters

• cell : A maze cell.
• query : Accepts "r", "c" or "t". "r" for the cell's ri. "c" for the cell's ci coordinate. "t" for the cell's type. The returned type will be "NO_WALL", "INWARD_WALL", "CCW_WALL" or "INWARD_CCW_WALL".

Examples

use <maze/mz_theta_cells.scad>;
use <maze/mz_theta_get.scad>;
use <hull_polyline2d.scad>;

rows = 8;
beginning_number = 8;
cell_width = 10;
wall_thickness = 2;

function vt_from_angle(theta, r) = [r * cos(theta), r * sin(theta)];

maze = mz_theta_cells(rows, beginning_number);
for(rows = maze) {
	for(cell = rows) {
		ri = mz_theta_get(cell, "r");
		ci = mz_theta_get(cell, "c");
		type = 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(type == "INWARD_WALL" || type == "INWARD_CCW_WALL") {
			hull_polyline2d([innerVt1, innerVt2], width = wall_thickness);
		}

		if(type == "CCW_WALL" || type == "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);
}