.. _changelog:

=========

Changelog

=========

1.3.4 (**2012-XX-XX**)

----------------------

:status: in-progress

:branch: beta

news

++++

- Whoosh logging is now controlled by the .ini files logging setup

- added clone-url into edit form on /settings page

- added help text into repo add/edit forms

- created rcextensions module with additional mappings (ref #322) and

  post push/pull/create repo hooks callbacks

- implemented #377 Users view for his own permissions on account page

- #399 added inheritance of permissions for users group on repos groups

- #401 repository group is automatically pre-selected when adding repos 

  inside a repository group

- added alternative HTTP 403 response when client failed to authenticate. Helps 

  solving issues with Mercurial and LDAP

- #402 removed group prefix from repository name when listing repositories 

  inside a group

- added gravatars into permission view and permissions autocomplete

- #347 when running multiple RhodeCode instances, properly invalidates cache 

  for all registered servers

fixes

+++++

- fixed #390 cache invalidation problems on repos inside group

- fixed #385 clone by ID url was loosing proxy prefix in URL

- fixed some unicode problems with waitress

- fixed issue with escaping < and > in changeset commits

- fixed error occurring during recursive group creation in API 

  create_repo function

- fixed #393 py2.5 fixes for routes url generator

- fixed #397 Private repository groups shows up before login

- fixed #396 fixed problems with revoking users in nested groups

- fixed mysql unicode issues + specified InnoDB as default engine with 

  utf8 charset

1.3.3 (**2012-03-02**)

----------------------

news

++++

fixes

+++++

- fixed some python2.5 compatibility issues 

- fixed issues with removed repos was accidentally added as groups, after

  full rescan of paths

- fixes #376 Cannot edit user (using container auth)

- fixes #378 Invalid image urls on changeset screen with proxy-prefix 

  configuration

- fixed initial sorting of repos inside repo group

- fixes issue when user tried to resubmit same permission into user/user_groups

- bumped beaker version that fixes #375 leap error bug

- fixed raw_changeset for git. It was generated with hg patch headers

- fixed vcs issue with last_changeset for filenodes

- fixed missing commit after hook delete

- fixed #372 issues with git operation detection that caused a security issue 

  for git repos

1.3.2 (**2012-02-28**)

----------------------

news

++++

fixes

+++++

- fixed git protocol issues with repos-groups

- fixed git remote repos validator that prevented from cloning remote git repos

- fixes #370 ending slashes fixes for repo and groups

- fixes #368 improved git-protocol detection to handle other clients

- fixes #366 When Setting Repository Group To Blank Repo Group Wont Be 

  Moved To Root

- fixes #371 fixed issues with beaker/sqlalchemy and non-ascii cache keys 

- fixed #373 missing cascade drop on user_group_to_perm table

1.3.1 (**2012-02-27**)

----------------------

news

++++

fixes

+++++

- redirection loop occurs when remember-me wasn't checked during login

- fixes issues with git blob history generation 

- don't fetch branch for git in file history dropdown. Causes unneeded slowness

1.3.0 (**2012-02-26**)

----------------------

news

++++

- code review, inspired by github code-comments 

- #215 rst and markdown README files support

- #252 Container-based and proxy pass-through authentication support

- #44 branch browser. Filtering of changelog by branches

- mercurial bookmarks support

- new hover top menu, optimized to add maximum size for important views

- configurable clone url template with possibility to specify  protocol like 

  ssh:// or http:// and also manually alter other parts of clone_url.

- enabled largefiles extension by default

- optimized summary file pages and saved a lot of unused space in them

- #239 option to manually mark repository as fork

- #320 mapping of commit authors to RhodeCode users

- #304 hashes are displayed using monospace font    

- diff configuration, toggle white lines and context lines

- #307 configurable diffs, whitespace toggle, increasing context lines

- sorting on branches, tags and bookmarks using YUI datatable

- improved file filter on files page

- implements #330 api method for listing nodes ar particular revision

- #73 added linking issues in commit messages to chosen issue tracker url

  based on user defined regular expression

- added linking of changesets in commit messages  

- new compact changelog with expandable commit messages

- firstname and lastname are optional in user creation

- #348 added post-create repository hook

- #212 global encoding settings is now configurable from .ini files 

- #227 added repository groups permissions

- markdown gets codehilite extensions

- new API methods, delete_repositories, grante/revoke permissions for groups 

  and repos

fixes

+++++

- rewrote dbsession management for atomic operations, and better error handling

- fixed sorting of repo tables

- #326 escape of special html entities in diffs

- normalized user_name => username in api attributes

- fixes #298 ldap created users with mixed case emails created conflicts 

  on saving a form

- fixes issue when owner of a repo couldn't revoke permissions for users 

  and groups

- fixes #271 rare JSON serialization problem with statistics

- fixes #337 missing validation check for conflicting names of a group with a

  repositories group

- #340 fixed session problem for mysql and celery tasks

- fixed #331 RhodeCode mangles repository names if the a repository group 

  contains the "full path" to the repositories

- #355 RhodeCode doesn't store encrypted LDAP passwords

1.2.5 (**2012-01-28**)

----------------------

news

++++

fixes

+++++

- #340 Celery complains about MySQL server gone away, added session cleanup

  for celery tasks

- #341 "scanning for repositories in None" log message during Rescan was missing

  a parameter

- fixed creating archives with subrepos. Some hooks were triggered during that

  operation leading to crash.

- fixed missing email in account page.

- Reverted Mercurial to 2.0.1 for windows due to bug in Mercurial that makes

  forking on windows impossible 

1.2.4 (**2012-01-19**)

----------------------

news

++++

- RhodeCode is bundled with mercurial series 2.0.X by default, with

  full support to largefiles extension. Enabled by default in new installations

- #329 Ability to Add/Remove Groups to/from a Repository via AP

- added requires.txt file with requirements

fixes

+++++

- fixes db session issues with celery when emailing admins

- #331 RhodeCode mangles repository names if the a repository group 

  contains the "full path" to the repositories

- #298 Conflicting e-mail addresses for LDAP and RhodeCode users

- DB session cleanup after hg protocol operations, fixes issues with

  `mysql has gone away` errors

- #333 doc fixes for get_repo api function

- #271 rare JSON serialization problem with statistics enabled

- #337 Fixes issues with validation of repository name conflicting with 

  a group name. A proper message is now displayed.

- #292 made ldap_dn in user edit readonly, to get rid of confusion that field

  doesn't work   

- #316 fixes issues with web description in hgrc files 

1.2.3 (**2011-11-02**)

----------------------

news

++++

- added option to manage repos group for non admin users

- added following API methods for get_users, create_user, get_users_groups, 

  get_users_group, create_users_group, add_user_to_users_groups, get_repos, 

  get_repo, create_repo, add_user_to_repo

- implements #237 added password confirmation for my account 

  and admin edit user.

- implements #291 email notification for global events are now sent to all

  administrator users, and global config email.

fixes

+++++

- added option for passing auth method for smtp mailer

- #276 issue with adding a single user with id>10 to usergroups

- #277 fixes windows LDAP settings in which missing values breaks the ldap auth 

- #288 fixes managing of repos in a group for non admin user

1.2.2 (**2011-10-17**)

----------------------

news

++++

- #226 repo groups are available by path instead of numerical id

fixes

+++++

- #259 Groups with the same name but with different parent group

- #260 Put repo in group, then move group to another group -> repo becomes unavailable

- #258 RhodeCode 1.2 assumes egg folder is writable (lockfiles problems)

- #265 ldap save fails sometimes on converting attributes to booleans, 

  added getter and setter into model that will prevent from this on db model level

- fixed problems with timestamps issues #251 and #213

- fixes #266 RhodeCode allows to create repo with the same name and in 

  the same parent as group

- fixes #245 Rescan of the repositories on Windows

- fixes #248 cannot edit repos inside a group on windows

- fixes #219 forking problems on windows

1.2.1 (**2011-10-08**)

----------------------

news

++++

fixes

+++++

- fixed problems with basic auth and push problems 

- gui fixes

- fixed logger

1.2.0 (**2011-10-07**)

----------------------

news

++++

- implemented #47 repository groups

- implemented #89 Can setup google analytics code from settings menu

- implemented #91 added nicer looking archive urls with more download options

  like tags, branches

- implemented #44 into file browsing, and added follow branch option

- implemented #84 downloads can be enabled/disabled for each repository

- anonymous repository can be cloned without having to pass default:default

  into clone url

- fixed #90 whoosh indexer can index chooses repositories passed in command 

  line

- extended journal with day aggregates and paging

- implemented #107 source code lines highlight ranges

- implemented #93 customizable changelog on combined revision ranges - 

  equivalent of githubs compare view 

- implemented #108 extended and more powerful LDAP configuration

- implemented #56 users groups

- major code rewrites optimized codes for speed and memory usage

- raw and diff downloads are now in git format

- setup command checks for write access to given path

- fixed many issues with international characters and unicode. It uses utf8

  decode with replace to provide less errors even with non utf8 encoded strings

- #125 added API KEY access to feeds

- #109 Repository can be created from external Mercurial link (aka. remote 

  repository, and manually updated (via pull) from admin panel

- beta git support - push/pull server + basic view for git repos

- added followers page and forks page

- server side file creation (with binary file upload interface) 

  and edition with commits powered by codemirror 

- #111 file browser file finder, quick lookup files on whole file tree 

- added quick login sliding menu into main page

- changelog uses lazy loading of affected files details, in some scenarios 

  this can improve speed of changelog page dramatically especially for 

  larger repositories.

- implements #214 added support for downloading subrepos in download menu.

- Added basic API for direct operations on rhodecode via JSON

- Implemented advanced hook management

fixes

+++++

- fixed file browser bug, when switching into given form revision the url was 

  not changing

- fixed propagation to error controller on simplehg and simplegit middlewares

- fixed error when trying to make a download on empty repository

- fixed problem with '[' chars in commit messages in journal

- fixed #99 Unicode errors, on file node paths with non utf-8 characters

- journal fork fixes

- removed issue with space inside renamed repository after deletion

- fixed strange issue on formencode imports

- fixed #126 Deleting repository on Windows, rename used incompatible chars. 

- #150 fixes for errors on repositories mapped in db but corrupted in 

  filesystem

- fixed problem with ascendant characters in realm #181

- fixed problem with sqlite file based database connection pool

- whoosh indexer and code stats share the same dynamic extensions map

- fixes #188 - relationship delete of repo_to_perm entry on user removal

- fixes issue #189 Trending source files shows "show more" when no more exist

- fixes issue #197 Relative paths for pidlocks

- fixes issue #198 password will require only 3 chars now for login form

- fixes issue #199 wrong redirection for non admin users after creating a repository

- fixes issues #202, bad db constraint made impossible to attach same group 

  more than one time. Affects only mysql/postgres

- fixes #218 os.kill patch for windows was missing sig param

- improved rendering of dag (they are not trimmed anymore when number of 

  heads exceeds 5)

1.1.8 (**2011-04-12**)

----------------------

news

++++

- improved windows support

fixes

+++++

- fixed #140 freeze of python dateutil library, since new version is python2.x

  incompatible

- setup-app will check for write permission in given path

- cleaned up license info issue #149

- fixes for issues #137,#116 and problems with unicode and accented characters.

- fixes crashes on gravatar, when passed in email as unicode

- fixed tooltip flickering problems

- fixed came_from redirection on windows

- fixed logging modules, and sql formatters

- windows fixes for os.kill issue #133

- fixes path splitting for windows issues #148

- fixed issue #143 wrong import on migration to 1.1.X

- fixed problems with displaying binary files, thanks to Thomas Waldmann

- removed name from archive files since it's breaking ui for long repo names

- fixed issue with archive headers sent to browser, thanks to Thomas Waldmann

- fixed compatibility for 1024px displays, and larger dpi settings, thanks to 

  Thomas Waldmann

- fixed issue #166 summary pager was skipping 10 revisions on second page

1.1.7 (**2011-03-23**)

----------------------

news

++++

fixes

+++++

- fixed (again) #136 installation support for FreeBSD

1.1.6 (**2011-03-21**)

----------------------

news

++++

fixes

+++++

- fixed #136 installation support for FreeBSD

- RhodeCode will check for python version during installation

1.1.5 (**2011-03-17**)

----------------------

news

++++

- basic windows support, by exchanging pybcrypt into sha256 for windows only

  highly inspired by idea of mantis406

fixes

+++++

- fixed sorting by author in main page

- fixed crashes with diffs on binary files

- fixed #131 problem with boolean values for LDAP

- fixed #122 mysql problems thanks to striker69 

- fixed problem with errors on calling raw/raw_files/annotate functions 

  with unknown revisions

- fixed returned rawfiles attachment names with international character

- cleaned out docs, big thanks to Jason Harris

1.1.4 (**2011-02-19**)

----------------------

news

++++

fixes

+++++

- fixed formencode import problem on settings page, that caused server crash

  when that page was accessed as first after server start

- journal fixes

- fixed option to access repository just by entering http://server/<repo_name> 

1.1.3 (**2011-02-16**)

----------------------

news

++++

- implemented #102 allowing the '.' character in username

- added option to access repository just by entering http://server/<repo_name>

- celery task ignores result for better performance

fixes

+++++

- fixed ehlo command and non auth mail servers on smtp_lib. Thanks to 

  apollo13 and Johan Walles

- small fixes in journal

- fixed problems with getting setting for celery from .ini files

- registration, password reset and login boxes share the same title as main 

  application now

- fixed #113: to high permissions to fork repository

- fixed problem with '[' chars in commit messages in journal

- removed issue with space inside renamed repository after deletion

- db transaction fixes when filesystem repository creation failed

- fixed #106 relation issues on databases different than sqlite

- fixed static files paths links to use of url() method

1.1.2 (**2011-01-12**)

----------------------

news

++++

fixes

+++++

- fixes #98 protection against float division of percentage stats

- fixed graph bug

- forced webhelpers version since it was making troubles during installation 

1.1.1 (**2011-01-06**)

----------------------

news

++++

- added force https option into ini files for easier https usage (no need to

  set server headers with this options)

- small css updates

fixes

+++++

- fixed #96 redirect loop on files view on repositories without changesets

- fixed #97 unicode string passed into server header in special cases (mod_wsgi)

  and server crashed with errors

- fixed large tooltips problems on main page

- fixed #92 whoosh indexer is more error proof

1.1.0 (**2010-12-18**)

----------------------

news

++++

- rewrite of internals for vcs >=0.1.10

- uses mercurial 1.7 with dotencode disabled for maintaining compatibility 

  with older clients

- anonymous access, authentication via ldap

- performance upgrade for cached repos list - each repository has its own 

  cache that's invalidated when needed.

- performance upgrades on repositories with large amount of commits (20K+)

- main page quick filter for filtering repositories

- user dashboards with ability to follow chosen repositories actions

- sends email to admin on new user registration

- added cache/statistics reset options into repository settings

- more detailed action logger (based on hooks) with pushed changesets lists

  and options to disable those hooks from admin panel

- introduced new enhanced changelog for merges that shows more accurate results

- new improved and faster code stats (based on pygments lexers mapping tables, 

  showing up to 10 trending sources for each repository. Additionally stats

  can be disabled in repository settings.

- gui optimizations, fixed application width to 1024px

- added cut off (for large files/changesets) limit into config files

- whoosh, celeryd, upgrade moved to paster command

- other than sqlite database backends can be used

fixes

+++++

- fixes #61 forked repo was showing only after cache expired

- fixes #76 no confirmation on user deletes

- fixes #66 Name field misspelled

- fixes #72 block user removal when he owns repositories

- fixes #69 added password confirmation fields

- fixes #87 RhodeCode crashes occasionally on updating repository owner

- fixes #82 broken annotations on files with more than 1 blank line at the end

- a lot of fixes and tweaks for file browser

- fixed detached session issues

- fixed when user had no repos he would see all repos listed in my account

- fixed ui() instance bug when global hgrc settings was loaded for server 

  instance and all hgrc options were merged with our db ui() object

- numerous small bugfixes

(special thanks for TkSoh for detailed feedback)

1.0.2 (**2010-11-12**)

----------------------

news

++++

- tested under python2.7

- bumped sqlalchemy and celery versions

fixes

+++++

- fixed #59 missing graph.js

- fixed repo_size crash when repository had broken symlinks

- fixed python2.5 crashes.

1.0.1 (**2010-11-10**)

----------------------

news

++++

- small css updated

fixes

+++++

- fixed #53 python2.5 incompatible enumerate calls

- fixed #52 disable mercurial extension for web

- fixed #51 deleting repositories don't delete it's dependent objects

1.0.0 (**2010-11-02**)

----------------------

- security bugfix simplehg wasn't checking for permissions on commands

  other than pull or push.

- fixed doubled messages after push or pull in admin journal

- templating and css corrections, fixed repo switcher on chrome, updated titles

- admin menu accessible from options menu on repository view

- permissions cached queries

1.0.0rc4  (**2010-10-12**)

--------------------------

- fixed python2.5 missing simplejson imports (thanks to Jens Bäckman)

- removed cache_manager settings from sqlalchemy meta

- added sqlalchemy cache settings to ini files

- validated password length and added second try of failure on paster setup-app

- fixed setup database destroy prompt even when there was no db

1.0.0rc3 (**2010-10-11**)

-------------------------

- fixed i18n during installation.

1.0.0rc2 (**2010-10-11**)

-------------------------

- Disabled dirsize in file browser, it's causing nasty bug when dir renames 

  occure. After vcs is fixed it'll be put back again.

- templating/css rewrites, optimized css.

"""Helper functions

Consists of functions to typically be used within templates, but also

available to Controllers. This module is available to both as 'h'.

"""

import random

import hashlib

import StringIO

import urllib

import math

import logging

from datetime import datetime

from pygments.formatters.html import HtmlFormatter

from pygments import highlight as code_highlight

from pylons import url, request, config

from pylons.i18n.translation import _, ungettext

from hashlib import md5

from webhelpers.html import literal, HTML, escape

from webhelpers.html.tools import *

from webhelpers.html.builder import make_tag

from webhelpers.html.tags import auto_discovery_link, checkbox, css_classes, \

    end_form, file, form, hidden, image, javascript_link, link_to, \

    link_to_if, link_to_unless, ol, required_legend, select, stylesheet_link, \

    submit, text, password, textarea, title, ul, xml_declaration, radio

from webhelpers.html.tools import auto_link, button_to, highlight, \

    js_obfuscate, mail_to, strip_links, strip_tags, tag_re

from webhelpers.number import format_byte_size, format_bit_size

from webhelpers.pylonslib import Flash as _Flash

from webhelpers.pylonslib.secure_form import secure_form

from webhelpers.text import chop_at, collapse, convert_accented_entities, \

    convert_misc_entities, lchop, plural, rchop, remove_formatting, \

    replace_whitespace, urlify, truncate, wrap_paragraphs

from webhelpers.date import time_ago_in_words

from webhelpers.paginate import Page

from webhelpers.html.tags import _set_input_attrs, _set_id_attr, \

    convert_boolean_attrs, NotGiven, _make_safe_id_component

from rhodecode.lib.annotate import annotate_highlight

from rhodecode.lib.utils import repo_name_slug

from rhodecode.lib.utils2 import str2bool, safe_unicode, safe_str, \

    get_changeset_safe

from rhodecode.lib.markup_renderer import MarkupRenderer

log = logging.getLogger(__name__)

def _reset(name, value=None, id=NotGiven, type="reset", **attrs):

    """

    Reset button

    """

    _set_input_attrs(attrs, type, name, value)

    _set_id_attr(attrs, id, name)

    convert_boolean_attrs(attrs, ["disabled"])

    return HTML.input(**attrs)

reset = _reset

safeid = _make_safe_id_component

def FID(raw_id, path):

    """

    Creates a uniqe ID for filenode based on it's hash of path and revision

    it's safe to use in urls

    :param raw_id:

    :param path:

    """

    return 'C-%s-%s' % (short_id(raw_id), md5(safe_str(path)).hexdigest()[:12])

def get_token():

    """Return the current authentication token, creating one if one doesn't

    already exist.

    """

    token_key = "_authentication_token"

    from pylons import session

    if not token_key in session:

        try:

            token = hashlib.sha1(str(random.getrandbits(128))).hexdigest()

        except AttributeError: # Python < 2.4

            token = hashlib.sha1(str(random.randrange(2 ** 128))).hexdigest()

        session[token_key] = token

        if hasattr(session, 'save'):

            session.save()

    return session[token_key]

class _GetError(object):

    """Get error from form_errors, and represent it as span wrapped error

    message

    :param field_name: field to fetch errors for

    :param form_errors: form errors dict

    """

    def __call__(self, field_name, form_errors):

        tmpl = """<span class="error_msg">%s</span>"""

        if form_errors and form_errors.has_key(field_name):

            return literal(tmpl % form_errors.get(field_name))

get_error = _GetError()

class _ToolTip(object):

    def __call__(self, tooltip_title, trim_at=50):

        """Special function just to wrap our text into nice formatted

        autowrapped text

        :param tooltip_title:

        """

        return escape(tooltip_title)

tooltip = _ToolTip()

class _FilesBreadCrumbs(object):

    def __call__(self, repo_name, rev, paths):

        if isinstance(paths, str):

            paths = safe_unicode(paths)

        url_l = [link_to(repo_name, url('files_home',

                                        repo_name=repo_name,

                                        revision=rev, f_path=''))]

        paths_l = paths.split('/')

        for cnt, p in enumerate(paths_l):

            if p != '':

                url_l.append(link_to(p,

                                     url('files_home',

                                         repo_name=repo_name,

                                         revision=rev,

                                         f_path='/'.join(paths_l[:cnt + 1])

                                         )

                                     )

                             )

        return literal('/'.join(url_l))

files_breadcrumbs = _FilesBreadCrumbs()

class CodeHtmlFormatter(HtmlFormatter):

    """

    def wrap(self, source, outfile):

        return self._wrap_div(self._wrap_pre(self._wrap_code(source)))

    def _wrap_code(self, source):

        for cnt, it in enumerate(source):

            i, t = it

            t = '<div id="L%s">%s</div>' % (cnt + 1, t)

            yield i, t

    def _wrap_tablelinenos(self, inner):

        dummyoutfile = StringIO.StringIO()

        lncount = 0

        for t, line in inner:

            if t:

                lncount += 1

            dummyoutfile.write(line)

        fl = self.linenostart

        mw = len(str(lncount + fl - 1))

        sp = self.linenospecial

        st = self.linenostep

        la = self.lineanchors

        aln = self.anchorlinenos

        nocls = self.noclasses

        if sp:

            lines = []

            for i in range(fl, fl + lncount):

                if i % st == 0:

                    if i % sp == 0:

                        if aln:

                            lines.append('<a href="#%s%d" class="special">%*d</a>' %

                                         (la, i, mw, i))

                        else:

                            lines.append('<span class="special">%*d</span>' % (mw, i))

                    else:

                        if aln:

                            lines.append('<a href="#%s%d">%*d</a>' % (la, i, mw, i))

                        else:

                            lines.append('%*d' % (mw, i))

                else:

                    lines.append('')

            ls = '\n'.join(lines)

        else:

            lines = []

            for i in range(fl, fl + lncount):

                if i % st == 0:

                    if aln:

                        lines.append('<a href="#%s%d">%*d</a>' % (la, i, mw, i))

                    else:

                        lines.append('%*d' % (mw, i))

                else:

                    lines.append('')

            ls = '\n'.join(lines)

        # in case you wonder about the seemingly redundant <div> here: since the

        # content in the other cell also is wrapped in a div, some browsers in

        # some configurations seem to mess up the formatting...

        if nocls:

            yield 0, ('<table class="%stable">' % self.cssclass +

                      '<tr><td><div class="linenodiv" '

                      'style="background-color: #f0f0f0; padding-right: 10px">'

                      '<pre style="line-height: 125%">' +

                      ls + '</pre></div></td><td id="hlcode" class="code">')

        else:

            yield 0, ('<table class="%stable">' % self.cssclass +

                      '<tr><td class="linenos"><div class="linenodiv"><pre>' +

                      ls + '</pre></div></td><td id="hlcode" class="code">')

        yield 0, dummyoutfile.getvalue()

        yield 0, '</td></tr></table>'

def pygmentize(filenode, **kwargs):

    """pygmentize function using pygments

    :param filenode:

    """

    return literal(code_highlight(filenode.content,

                                  filenode.lexer, CodeHtmlFormatter(**kwargs)))

def pygmentize_annotation(repo_name, filenode, **kwargs):

    """

    pygmentize function for annotation

    :param filenode:

    """

    color_dict = {}

    def gen_color(n=10000):

        """generator for getting n of evenly distributed colors using

        hsv color and golden ratio. It always return same order of colors

        :returns: RGB tuple

        """

        def hsv_to_rgb(h, s, v):

            if s == 0.0:

                return v, v, v

            i = int(h * 6.0)  # XXX assume int() truncates!

            f = (h * 6.0) - i

            p = v * (1.0 - s)

            q = v * (1.0 - s * f)

            t = v * (1.0 - s * (1.0 - f))