69 lines
2.2 KiB
C#
69 lines
2.2 KiB
C#
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// Copyright 2017 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.VR;
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using System.Collections;
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/// Helper functions to perform common math operations for Gvr.
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public static class GvrMathHelpers {
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private static Vector2 sphericalCoordinatesResult;
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public static Vector3 GetIntersectionPosition(Camera cam, RaycastResult raycastResult) {
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// Check for camera
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if (cam == null) {
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return Vector3.zero;
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}
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float intersectionDistance = raycastResult.distance + cam.nearClipPlane;
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Vector3 intersectionPosition = cam.transform.position + cam.transform.forward * intersectionDistance;
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return intersectionPosition;
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}
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public static Vector2 GetViewportCenter() {
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int viewportWidth = Screen.width;
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int viewportHeight = Screen.height;
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#if UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR) && UNITY_ANDROID
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// GVR native integration is supported.
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if (VRSettings.enabled) {
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viewportWidth = VRSettings.eyeTextureWidth;
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viewportHeight = VRSettings.eyeTextureHeight;
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}
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#endif // UNITY_HAS_GOOGLEVR && (UNITY_ANDROID || UNITY_EDITOR) && UNITY_ANDROID
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return new Vector2(0.5f * viewportWidth, 0.5f * viewportHeight);
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}
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public static Vector2 NormalizedCartesianToSpherical(Vector3 cartCoords) {
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cartCoords.Normalize();
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if (cartCoords.x == 0) {
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cartCoords.x = Mathf.Epsilon;
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}
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float outPolar = Mathf.Atan(cartCoords.z / cartCoords.x);
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if (cartCoords.x < 0) {
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outPolar += Mathf.PI;
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}
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float outElevation = Mathf.Asin(cartCoords.y);
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sphericalCoordinatesResult.x = outPolar;
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sphericalCoordinatesResult.y = outElevation;
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return sphericalCoordinatesResult;
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}
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}
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