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59 lines
1.6 KiB
Markdown
59 lines
1.6 KiB
Markdown
# mz_theta_get
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It's a helper for getting data from a theta-maze cell.
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**Since:** 3.0
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## Parameters
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- `cell` : A maze cell.
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- `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"`.
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## Examples
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use <maze/mz_theta_cells.scad>;
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use <maze/mz_theta_get.scad>;
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use <hull_polyline2d.scad>;
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rows = 8;
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beginning_number = 8;
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cell_width = 10;
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wall_thickness = 2;
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function vt_from_angle(theta, r) = [r * cos(theta), r * sin(theta)];
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maze = mz_theta_cells(rows, beginning_number);
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for(rows = maze) {
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for(cell = rows) {
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ri = mz_theta_get(cell, "r");
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ci = mz_theta_get(cell, "c");
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type = mz_theta_get(cell, "t");
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thetaStep = 360 / len(maze[ri]);
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innerR = (ri + 1) * cell_width;
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outerR = (ri + 2) * cell_width;
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theta1 = thetaStep * ci;
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theta2 = thetaStep * (ci + 1);
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innerVt1 = vt_from_angle(theta1, innerR);
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innerVt2 = vt_from_angle(theta2, innerR);
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outerVt2 = vt_from_angle(theta2, outerR);
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if(type == "INWARD_WALL" || type == "INWARD_CCW_WALL") {
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hull_polyline2d([innerVt1, innerVt2], width = wall_thickness);
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}
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if(type == "CCW_WALL" || type == "INWARD_CCW_WALL") {
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hull_polyline2d([innerVt2, outerVt2], width = wall_thickness);
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}
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}
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}
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thetaStep = 360 / len(maze[rows - 1]);
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r = cell_width * (rows + 1);
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for(theta = [0:thetaStep:360 - thetaStep]) {
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vt1 = vt_from_angle(theta, r);
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vt2 = vt_from_angle(theta + thetaStep, r);
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hull_polyline2d([vt1, vt2], width = wall_thickness);
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}
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