Spherical

src/3d/index.ts

@@ -9,6 +9,7 @@ export * from "./math/Matrix4";
 export * from "./math/Quaternion";
 export * from "./math/Vector2";
 export * from "./math/Vector3";
+export * from "./math/Spherical";
 
 //几何
 export * from "./geometries"

src/3d/math/Spherical.ts

+/**
+ * @author bhouston / http://clara.io
+ * @author WestLangley / http://github.com/WestLangley
+ *
+ * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system
+ *
+ * The polar angle (phi) is measured from the positive y-axis. The positive y-axis is up.
+ * The azimuthal angle (theta) is measured from the positive z-axis.
+ */
+
+export class Spherical {
+	radius = 1.0;
+	phi = 0;
+	theta = 0;
+
+	constructor(radius = 1.0, phi = 0, theta = 0) {
+		this.radius = radius;
+		this.phi = phi; // polar angle
+		this.theta = theta; // azimuthal angle
+	}
+
+	set(radius, phi, theta) {
+
+		this.radius = radius;
+		this.phi = phi;
+		this.theta = theta;
+
+		return this;
+
+	}
+
+	clone() {
+
+		return (new Spherical()).copy(this);
+
+	}
+
+	copy(other) {
+
+		this.radius = other.radius;
+		this.phi = other.phi;
+		this.theta = other.theta;
+
+		return this;
+
+	}
+
+	// restrict phi to be betwee EPS and PI-EPS
+	makeSafe() {
+
+		var EPS = 0.000001;
+		this.phi = Math.max(EPS, Math.min(Math.PI - EPS, this.phi));
+
+		return this;
+
+	}
+
+	setFromVector3(v) {
+
+		return this.setFromCartesianCoords(v.x, v.y, v.z);
+
+	}
+
+	setFromCartesianCoords(x, y, z) {
+
+		this.radius = Math.sqrt(x * x + y * y + z * z);
+
+		if (this.radius === 0) {
+
+			this.theta = 0;
+			this.phi = 0;
+
+		} else {
+
+			this.theta = Math.atan2(x, z);
+			this.phi = Math.acos(FYGE.clamp(y / this.radius, -1, 1));
+
+		}
+
+		return this;
+
+	}
+}
+