Close × Method & limitations This is an experimental geometric daylight and solar screening tool. Draw a closed room, mark allowed window stretches, and let a seeded multi-objective search vary the facade. All computation and imported files stay in your browser.
What is calculated Ray visibility through actual openings; direct sunlight and normalised isotropic diffuse sky; glazing visible transmission; incident radiation; and a fixed-SHGC admitted solar-gain estimate. Fast and refined runs share these assumptions. There is no interior interreflection, detailed angular glazing optics, DGP or certification assessment. Thermal-enabled studies add a separate annual reduced-order heat and moisture balance.
Useful sampled daylight is the area-weighted percentage of evaluated sensor-hours within the chosen lux band. It is not annual UDI or sDA. Solar results are sampled means, not annual energy or cooling loads. Shading area counts one generating surface per device, not both rendered faces. External blockers and the opaque room shell stop rays.
Reference and adaptations Adapted from the existing Jamshed Bhote facade study: local-standard-time solar position, north rotation, direct/diffuse separation, normalised sky integral, triangle ray checks, exterior shading construction, weather units, legends, and processing feedback. The new engine generates room-specific geometry and a bounding-volume hierarchy. Fixed OBJ inputs, PHP execution, reflected-light approximations, wind and the original visual sky field are omitted. The displayed sun is a geometric preview; only evaluated candidates receive numerical results.
Sampling and optimisation Fast: 15th of 12 months, interval-ending hours 10/12/14/16 evaluated at their midpoints; up to 96 floor cells and 24 sky directions. Refined: 5th/15th/25th, interval-ending hours 10–17; up to 256 cells and 96 directions. Samples have equal weights; results describe this selected sample set, not a reconstructed annual distribution. Grid cells are clipped to the room triangulation and weighted by actual area.
NSGA-II uses population 24, nondominated ranking, crowding distance and mixed categorical/numerical variation. Quick search stops after 48 trials (2 generations); Standard after 240 (10), and Deep after 480 (20). The percentage is completion of that chosen budget, not the entire continuous design space. Trials include duplicates and rejected geometry. There is no guarantee of a global optimum. Refinement can change the apparent frontier.
Drawing and navigation Rectangle / blocker: drag two opposite corners. Polyline: click vertices, then Enter or double-click to close; Escape cancels. Window: drag along a wall. Select an envelope to edit sill/head limits. Select: drag a vertex or click a wall/window/blocker. Exact dimensions appear below the plan. Middle/right-drag or Pan tool moves the plan; wheel zooms. Ctrl+Z / Ctrl+Y undo and redo; Delete removes a selected window or blocker. Removing a vertex also removes windows on changed edges. Orbit the model by dragging. Preview current analyses baseline parameters. To explore individual devices, lock/narrow search bounds. Changes during search pause it; restore its snapshot to continue. Pin up to eight candidates for refinement, or refine the selected design when none are pinned. Live view follows completed designs by default, with a moving sun and illustrative visibility rays. Clicking a result holds the view while calculation continues; Resume live view rejoins it. Camera dragging never automatically rotates the model. Sun motion does not change the weather samples or the optimisation results. Weather provenance
EPW direct normal/diffuse horizontal radiation and illuminance are read separately. Radiation interval totals in Wh/m² are treated as interval-mean W/m² for these one-hour records. Hour-ending records use midpoint solar position. Missing sampled fields are rejected; no fixed luminous-efficacy substitution is invented.
Annual thermal model One well-mixed air node and moisture balance; layered 1D finite-volume opaque conduction; massless glazing; implicit integration; internal convection and conservative area-weighted longwave exchange; exterior solar absorption, convection and sky exchange. Fast: ≤100mm material cells, 30-minute steps, 10°/5° direct-solar visibility bins. Refined: ≤50mm cells, 10-minute steps, exact hourly sun directions. Thermal analysis uses the full 8760/8784-hour weather year, separately from sampled daylight. A 20% immediate-convective admitted-solar fraction is assumed; 80% is assigned to first-hit interior surfaces/direct rays and area-weighted surfaces/diffuse sky. Exterior film convection 15 W/m²K and reference radiative exchange 4.7 W/m²K are approximations. No reflected shortwave ground term. Heating, equipment curves, thermal bridges, moisture buffering and condensation transport are omitted. AC-on uses ideal sensible cooling and independent dehumidification; fixed-COP electricity excludes fans/reheat. Peak is an hourly weather-year peak, not equipment sizing. Surface MRT uses area-weighted fourth-power absolute temperatures; all surfaces share the specified emissivity. operative temperature is 50% air/50% MRT. Warm-up repeats the first seven days up to ten times; temperature states and moisture are checked for convergence. Supersaturation is flagged rather than silently clipped. Material layers, boundary conditions, glazing assumptions, schedules, weather and objective profile are part of the frozen study.
Server processing and privacy Daylight, thermal analysis and optimisation run on this website’s PHP server. Room geometry, settings and weather inputs are sent to the server for those calculations. Plan editing and 3D display run in your browser. An internet connection is required for calculations. Browser autosave and project JSON export preserve your own work. Closing the page stops further calculation requests; inactive server jobs expire automatically.
Third-party notices Three.js r160
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THE SOFTWARE.
Manrope
Copyright 2018 The Manrope Project Authors (https://github.com/googlefonts/manrope)
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL
-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------
PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.
The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded,
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.
DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.
"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).
"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).
"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.
"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.
PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:
1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.
2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.
3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
Copyright Holder. This restriction only applies to the primary font name as
presented to the users.
4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.
5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created
using the Font Software.
TERMINATION
This license becomes null and void if any of the above conditions are
not met.
DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.
EB Garamond
Copyright 2017 The EB Garamond Project Authors (https://github.com/octaviopardo/EBGaramond12)
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
https://openfontlicense.org
-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------
PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.
The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded,
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.
DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.
"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).
"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).
"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.
"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.
PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:
1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.
2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.
3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
Copyright Holder. This restriction only applies to the primary font name as
presented to the users.
4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.
5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created
using the Font Software.
TERMINATION
This license becomes null and void if any of the above conditions are
not met.
DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.
DM Mono
Copyright 2020 The DM Mono Project Authors (https://www.github.com/googlefonts/dm-mono)
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL
-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------
PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.
The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded,
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.
DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.
"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).
"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).
"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.
"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.
PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:
1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.
2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.
3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
Copyright Holder. This restriction only applies to the primary font name as
presented to the users.
4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.
5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created
using the Font Software.
TERMINATION
This license becomes null and void if any of the above conditions are
not met.
DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.
Grids & presentation Drawing grids, snap intervals, model ground grids and guide overlays are display tools. Analysis target cell sizes change sensor sampling and create a revised study; all candidates within a run share the same area-weighted cells. Fast and refined cell caps remain 96 and 256. Sensor boundaries show clipped integration pieces, so triangulation may split a nominal grid square. Focus view hides setup panels while keeping search, actual results and export actions accessible. Keyboard: V select, R rectangle, L polyline, W window, B blocker, H pan; F focus; Escape exit.