mirror of
https://github.com/HifiExperiments/overte.git
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38d229ab67
o allows UrlReader to cache the downloaded content in a local (updating it
automatically when the server indicates a newer time stamp)
o retires the FieldOfView class
o makes the stars move again
o fixes bad deletion in UrlReader (delete instead of delete[])
o allows UrlReader to advertise supported compression algorithms to the server
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
//
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// Stars.h
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// interface
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//
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// Created by Tobias Schwinger on 3/22/13.
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// Copyright (c) 2013 High Fidelity, Inc. All rights reserved.
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//
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#ifndef __interface__Stars__
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#define __interface__Stars__
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#include <glm/glm.hpp>
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namespace starfield { class Controller; }
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/**
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* Starfield rendering component.
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*/
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class Stars {
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starfield::Controller* _ptrController;
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public:
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Stars();
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~Stars();
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/**
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* Reads input file from URL. Returns true upon success.
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*
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* The limit parameter allows to reduce the number of stars
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* that are loaded, keeping the brightest ones.
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*/
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bool readInput(const char* url, const char* cacheFile = 0l, unsigned limit = 200000);
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/**
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* Renders the starfield from a local viewer's perspective.
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* The parameter specifies the field of view.
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*/
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void render(float fovDiagonal, float aspect, glm::mat4 const& view);
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/**
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* Sets the resolution for FOV culling.
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*
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* The parameter determines the number of tiles in azimuthal
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* and altitudinal directions.
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*
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* GPU resources are updated upon change in which case 'true'
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* is returned.
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*/
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bool setResolution(unsigned k);
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/**
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* Allows to alter the number of stars to be rendered given a
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* factor. The least brightest ones are omitted first.
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*
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* The further parameters determine when GPU resources should
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* be reallocated. Its value is fractional in respect to the
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* last number of stars 'n' that caused 'n * (1+overalloc)' to
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* be allocated. When the next call to setLOD causes the total
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* number of stars that could be rendered to drop below 'n *
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* (1-realloc)' or rises above 'n * (1+realloc)' GPU resources
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* are updated. Note that all parameters must be fractions,
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* that is within the range [0;1] and that 'overalloc' must be
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* greater than or equal to 'realloc'.
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*
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* The current level of detail is returned as a float in [0;1].
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*/
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float changeLOD(float factor,
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float overalloc = 0.25, float realloc = 0.15);
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private:
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// don't copy/assign
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Stars(Stars const&); // = delete;
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Stars& operator=(Stars const&); // delete;
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};
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#endif
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