Frame-rate control for applications

Redefined classes

redef class App

gamnit :: limit_fps $ App

App subclasses are cross-platform applications

All class definitions

redef class App

gamnit :: limit_fps $ App

App subclasses are cross-platform applications
package_diagram gamnit::limit_fps limit_fps gamnit gamnit gamnit::limit_fps->gamnit realtime realtime gamnit::limit_fps->realtime core core realtime->core ...gamnit ... ...gamnit->gamnit ...core ... ...core->core gamnit::flat flat gamnit::flat->gamnit::limit_fps gamnit::more_materials more_materials gamnit::more_materials->gamnit::flat gamnit::virtual_gamepad virtual_gamepad gamnit::virtual_gamepad->gamnit::flat gamnit::more_materials... ... gamnit::more_materials...->gamnit::more_materials gamnit::virtual_gamepad... ... gamnit::virtual_gamepad...->gamnit::virtual_gamepad


module abstract_collection

core :: abstract_collection

Abstract collection classes and services.
module abstract_text

core :: abstract_text

Abstract class for manipulation of sequences of characters
module app

app :: app

app.nit is a framework to create cross-platform applications
module app_base

app :: app_base

Base of the app.nit framework, defines App
module array

core :: array

This module introduces the standard array structure.
module assets

app :: assets

Portable services to load resources from the assets folder
module aware

android :: aware

Android compatibility module
module bitset

core :: bitset

Services to handle BitSet
module bytes

core :: bytes

Services for byte streams and arrays
module c

c :: c

Structures and services for compatibility with the C language
module caching

serialization :: caching

Services for caching serialization engines
module circular_array

core :: circular_array

Efficient data structure to access both end of the sequence.
module codec_base

core :: codec_base

Base for codecs to use with streams
module codecs

core :: codecs

Group module for all codec-related manipulations
module collection

core :: collection

This module define several collection classes.
module core

core :: core

Standard classes and methods used by default by Nit programs and libraries.
module display

gamnit :: display

Abstract display services
module engine_tools

serialization :: engine_tools

Advanced services for serialization engines
module environ

core :: environ

Access to the environment variables of the process
module error

core :: error

Standard error-management infrastructure.
module exec

core :: exec

Invocation and management of operating system sub-processes.
module file

core :: file

File manipulations (create, read, write, etc.)
module fixed_ints

core :: fixed_ints

Basic integers of fixed-precision
module fixed_ints_text

core :: fixed_ints_text

Text services to complement fixed_ints
module flat

core :: flat

All the array-based text representations
module gc

core :: gc

Access to the Nit internal garbage collection mechanism
module glesv2

glesv2 :: glesv2

OpenGL graphics rendering library for embedded systems, version 2.0
module hash_collection

core :: hash_collection

Introduce HashMap and HashSet.
module input

mnit :: input

Defines abstract classes for user and general inputs to the application.
module inspect

serialization :: inspect

Refine Serializable::inspect to show more useful information
module iso8859_1

core :: iso8859_1

Codec for ISO8859-1 I/O
module kernel

core :: kernel

Most basic classes and methods.
module list

core :: list

This module handle double linked lists
module math

core :: math

Mathematical operations
module matrix

matrix :: matrix

Services for matrices of Float values
module meta

meta :: meta

Simple user-defined meta-level to manipulate types of instances as object.
module more_collections

more_collections :: more_collections

Highly specific, but useful, collections-related classes.
module native

core :: native

Native structures for text and bytes
module numeric

core :: numeric

Advanced services for Numeric types
module poset

poset :: poset

Pre order sets and partial order set (ie hierarchies)
module programs

gamnit :: programs

Services for graphical programs with shaders, attributes and uniforms
module protocol

core :: protocol

module queue

core :: queue

Queuing data structures and wrappers
module range

core :: range

Module for range of discrete objects.
module re

core :: re

Regular expression support for all services based on Pattern
module ropes

core :: ropes

Tree-based representation of a String.
module serialization

serialization :: serialization

General serialization services
module serialization_core

serialization :: serialization_core

Abstract services to serialize Nit objects to different formats
module sorter

core :: sorter

This module contains classes used to compare things and sorts arrays.
module stream

core :: stream

Input and output streams of characters
module text

core :: text

All the classes and methods related to the manipulation of text entities
module textures

gamnit :: textures

Load textures, create subtextures and manage their life-cycle
module time

core :: time

Management of time and dates
module union_find

core :: union_find

union–find algorithm using an efficient disjoint-set data structure
module utf8

core :: utf8

Codec for UTF-8 I/O


module gamnit

gamnit :: gamnit

Game and multimedia framework for Nit
module realtime

realtime :: realtime

Services to keep time of the wall clock time


module flat

gamnit :: flat

Simple API for 2D games, built around Sprite and App::update


module a_star-m


module cardboard

gamnit :: cardboard

Update the orientation of world_camera at each frame using the head position given by android::cardboard
module depth

gamnit :: depth

Framework for 3D games in Nit
module more_materials

gamnit :: more_materials

Various material implementations
module more_models

gamnit :: more_models

Services to load models from the assets folder
module selection

gamnit :: selection

Select Actor from a screen coordinate
module stereoscopic_view

gamnit :: stereoscopic_view

Refine EulerCamera and App::frame_core_draw to get a stereoscopic view
module virtual_gamepad

gamnit :: virtual_gamepad

Virtual gamepad mapped to keyboard keys for quick and dirty mobile support
module vr

gamnit :: vr

VR support for gamnit depth, for Android only
# Frame-rate control for applications
module limit_fps

import gamnit
private import realtime

redef class App
	# Limit the frame-rate to a given frequency
	# This basically limits how much `frame_core` is called per second.
	# Zero (or a negative value) means no limit.
	# Applications can modify this value even during the main-loop.
	var maximum_fps = 0.0 is writable

	# Current frame-rate
	# Updated each 5 seconds, initialized at the value of `maximum_fps`.
	var current_fps: Float = maximum_fps is lazy

	redef fun frame_full

	# The clock for limit_fps
	private var clock = new Clock

	# Number of frames since the last deadline
	# Used to compute `current_fps`.
	private var frame_count = 0

	# Deadline used to compute `current_fps`
	private var frame_count_deadline = 5.0

	# Check and sleep to maintain a frame-rate bellow `maximum_fps`
	# Also periodically update `current_fps`
	# Is automatically called at the end of `full_frame`.
	fun limit_fps
		var t =
		if t >= frame_count_deadline then
			var cfps = frame_count.to_f / 5.0
			self.current_fps = cfps
			frame_count = 0
			frame_count_deadline = t + 5.0
		frame_count += 1

		var mfps = maximum_fps
		if mfps <= 0.0 then return
		var lapse = clock.lapse
		var dt = lapse.to_f
		var target_dt = 1.0 / mfps
		if dt < target_dt then
			var sleep_t = target_dt - dt