mirror of
https://github.com/overte-org/overte.git
synced 2025-05-07 10:39:26 +02:00
39 lines
1.6 KiB
C++
39 lines
1.6 KiB
C++
//
|
|
// OctreeUtils.h
|
|
// libraries/octree/src
|
|
//
|
|
// Created by Andrew Meadows 2016.03.04
|
|
// Copyright 2016 High Fidelity, Inc.
|
|
//
|
|
// Distributed under the Apache License, Version 2.0.
|
|
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
|
|
//
|
|
|
|
#ifndef hifi_OctreeUtils_h
|
|
#define hifi_OctreeUtils_h
|
|
|
|
#include "OctreeConstants.h"
|
|
|
|
class AABox;
|
|
class QJsonDocument;
|
|
|
|
/// renderAccuracy represents a floating point "visibility" of an object based on it's view from the camera. At a simple
|
|
/// level it returns 0.0f for things that are so small for the current settings that they could not be visible.
|
|
float calculateRenderAccuracy(const glm::vec3& position,
|
|
const AABox& bounds,
|
|
float octreeSizeScale = DEFAULT_OCTREE_SIZE_SCALE,
|
|
int boundaryLevelAdjust = 0);
|
|
|
|
float boundaryDistanceForRenderLevel(unsigned int renderLevel, float voxelSizeScale);
|
|
|
|
float getPerspectiveAccuracyAngle(float octreeSizeScale, int boundaryLevelAdjust);
|
|
float getOrthographicAccuracySize(float octreeSizeScale, int boundaryLevelAdjust);
|
|
|
|
// MIN_ELEMENT_ANGULAR_DIAMETER = angular diameter of 1x1x1m cube at 400m = sqrt(3) / 400 = 0.0043301 radians ~= 0.25 degrees
|
|
const float MIN_ELEMENT_ANGULAR_DIAMETER = 0.0043301f; // radians
|
|
// NOTE: the entity bounding cube is larger than the smallest possible containing octree element by sqrt(3)
|
|
const float SQRT_THREE = 1.73205080f;
|
|
const float MIN_ENTITY_ANGULAR_DIAMETER = MIN_ELEMENT_ANGULAR_DIAMETER * SQRT_THREE;
|
|
const float MIN_VISIBLE_DISTANCE = 0.0001f; // helps avoid divide-by-zero check
|
|
|
|
#endif // hifi_OctreeUtils_h
|