68 lines
2.8 KiB
JavaScript
68 lines
2.8 KiB
JavaScript
import { assertIs, error } from "../utils";
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export var RotationTypes;
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(function (RotationTypes) {
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RotationTypes["Degrees"] = "degrees";
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RotationTypes["Radians"] = "radians";
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})(RotationTypes || (RotationTypes = {}));
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export var radians = function (radianAngle) {
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assertIs(radianAngle, 'radianAngle', ['number']);
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return { type: RotationTypes.Radians, angle: radianAngle };
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};
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export var degrees = function (degreeAngle) {
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assertIs(degreeAngle, 'degreeAngle', ['number']);
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return { type: RotationTypes.Degrees, angle: degreeAngle };
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};
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var Radians = RotationTypes.Radians, Degrees = RotationTypes.Degrees;
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export var degreesToRadians = function (degree) { return (degree * Math.PI) / 180; };
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export var radiansToDegrees = function (radian) { return (radian * 180) / Math.PI; };
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// prettier-ignore
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export var toRadians = function (rotation) {
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return rotation.type === Radians ? rotation.angle
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: rotation.type === Degrees ? degreesToRadians(rotation.angle)
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: error("Invalid rotation: " + JSON.stringify(rotation));
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};
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// prettier-ignore
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export var toDegrees = function (rotation) {
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return rotation.type === Radians ? radiansToDegrees(rotation.angle)
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: rotation.type === Degrees ? rotation.angle
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: error("Invalid rotation: " + JSON.stringify(rotation));
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};
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export var reduceRotation = function (degreeAngle) {
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if (degreeAngle === void 0) { degreeAngle = 0; }
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var quadrants = (degreeAngle / 90) % 4;
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if (quadrants === 0)
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return 0;
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if (quadrants === 1)
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return 90;
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if (quadrants === 2)
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return 180;
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if (quadrants === 3)
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return 270;
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return 0; // `degreeAngle` is not a multiple of 90
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};
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export var adjustDimsForRotation = function (dims, degreeAngle) {
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if (degreeAngle === void 0) { degreeAngle = 0; }
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var rotation = reduceRotation(degreeAngle);
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return rotation === 90 || rotation === 270
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? { width: dims.height, height: dims.width }
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: { width: dims.width, height: dims.height };
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};
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export var rotateRectangle = function (rectangle, borderWidth, degreeAngle) {
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if (borderWidth === void 0) { borderWidth = 0; }
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if (degreeAngle === void 0) { degreeAngle = 0; }
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var x = rectangle.x, y = rectangle.y, w = rectangle.width, h = rectangle.height;
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var r = reduceRotation(degreeAngle);
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var b = borderWidth / 2;
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// prettier-ignore
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if (r === 0)
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return { x: x - b, y: y - b, width: w, height: h };
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else if (r === 90)
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return { x: x - h + b, y: y - b, width: h, height: w };
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else if (r === 180)
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return { x: x - w + b, y: y - h + b, width: w, height: h };
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else if (r === 270)
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return { x: x - b, y: y - w + b, width: h, height: w };
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else
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return { x: x - b, y: y - b, width: w, height: h };
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};
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//# sourceMappingURL=rotations.js.map
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