Input handling library for Zdog.
Initial commit
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+373
LICENSE
+373
LICENSE
···
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Mozilla Public License Version 2.0
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==================================
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1. Definitions
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--------------
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1.1. "Contributor"
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means each individual or legal entity that creates, contributes to
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the creation of, or owns Covered Software.
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1.2. "Contributor Version"
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means the combination of the Contributions of others (if any) used
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by a Contributor and that particular Contributor's Contribution.
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1.3. "Contribution"
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means Covered Software of a particular Contributor.
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1.4. "Covered Software"
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means Source Code Form to which the initial Contributor has attached
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the notice in Exhibit A, the Executable Form of such Source Code
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Form, and Modifications of such Source Code Form, in each case
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including portions thereof.
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1.5. "Incompatible With Secondary Licenses"
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means
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(a) that the initial Contributor has attached the notice described
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in Exhibit B to the Covered Software; or
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(b) that the Covered Software was made available under the terms of
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version 1.1 or earlier of the License, but not also under the
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terms of a Secondary License.
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1.6. "Executable Form"
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means any form of the work other than Source Code Form.
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1.7. "Larger Work"
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means a work that combines Covered Software with other material, in
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a separate file or files, that is not Covered Software.
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1.8. "License"
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means this document.
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1.9. "Licensable"
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means having the right to grant, to the maximum extent possible,
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whether at the time of the initial grant or subsequently, any and
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all of the rights conveyed by this License.
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1.10. "Modifications"
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means any of the following:
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(a) any file in Source Code Form that results from an addition to,
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deletion from, or modification of the contents of Covered
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Software; or
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(b) any new file in Source Code Form that contains any Covered
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Software.
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1.11. "Patent Claims" of a Contributor
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means any patent claim(s), including without limitation, method,
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process, and apparatus claims, in any patent Licensable by such
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Contributor that would be infringed, but for the grant of the
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License, by the making, using, selling, offering for sale, having
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made, import, or transfer of either its Contributions or its
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Contributor Version.
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1.12. "Secondary License"
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means either the GNU General Public License, Version 2.0, the GNU
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Lesser General Public License, Version 2.1, the GNU Affero General
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Public License, Version 3.0, or any later versions of those
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licenses.
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1.13. "Source Code Form"
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means the form of the work preferred for making modifications.
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1.14. "You" (or "Your")
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means an individual or a legal entity exercising rights under this
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License. For legal entities, "You" includes any entity that
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controls, is controlled by, or is under common control with You. For
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purposes of this definition, "control" means (a) the power, direct
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or indirect, to cause the direction or management of such entity,
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whether by contract or otherwise, or (b) ownership of more than
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fifty percent (50%) of the outstanding shares or beneficial
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ownership of such entity.
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2. License Grants and Conditions
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--------------------------------
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2.1. Grants
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Each Contributor hereby grants You a world-wide, royalty-free,
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non-exclusive license:
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(a) under intellectual property rights (other than patent or trademark)
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Licensable by such Contributor to use, reproduce, make available,
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modify, display, perform, distribute, and otherwise exploit its
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Contributions, either on an unmodified basis, with Modifications, or
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as part of a Larger Work; and
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(b) under Patent Claims of such Contributor to make, use, sell, offer
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for sale, have made, import, and otherwise transfer either its
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Contributions or its Contributor Version.
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2.2. Effective Date
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The licenses granted in Section 2.1 with respect to any Contribution
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become effective for each Contribution on the date the Contributor first
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distributes such Contribution.
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2.3. Limitations on Grant Scope
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The licenses granted in this Section 2 are the only rights granted under
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this License. No additional rights or licenses will be implied from the
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distribution or licensing of Covered Software under this License.
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Notwithstanding Section 2.1(b) above, no patent license is granted by a
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Contributor:
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(a) for any code that a Contributor has removed from Covered Software;
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or
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(b) for infringements caused by: (i) Your and any other third party's
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modifications of Covered Software, or (ii) the combination of its
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Contributions with other software (except as part of its Contributor
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Version); or
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(c) under Patent Claims infringed by Covered Software in the absence of
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its Contributions.
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This License does not grant any rights in the trademarks, service marks,
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or logos of any Contributor (except as may be necessary to comply with
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the notice requirements in Section 3.4).
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2.4. Subsequent Licenses
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No Contributor makes additional grants as a result of Your choice to
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distribute the Covered Software under a subsequent version of this
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License (see Section 10.2) or under the terms of a Secondary License (if
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permitted under the terms of Section 3.3).
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2.5. Representation
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Each Contributor represents that the Contributor believes its
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Contributions are its original creation(s) or it has sufficient rights
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to grant the rights to its Contributions conveyed by this License.
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2.6. Fair Use
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This License is not intended to limit any rights You have under
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applicable copyright doctrines of fair use, fair dealing, or other
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equivalents.
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2.7. Conditions
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Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
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in Section 2.1.
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3. Responsibilities
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-------------------
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3.1. Distribution of Source Form
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All distribution of Covered Software in Source Code Form, including any
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Modifications that You create or to which You contribute, must be under
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the terms of this License. You must inform recipients that the Source
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Code Form of the Covered Software is governed by the terms of this
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License, and how they can obtain a copy of this License. You may not
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attempt to alter or restrict the recipients' rights in the Source Code
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Form.
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3.2. Distribution of Executable Form
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If You distribute Covered Software in Executable Form then:
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(a) such Covered Software must also be made available in Source Code
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Form, as described in Section 3.1, and You must inform recipients of
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the Executable Form how they can obtain a copy of such Source Code
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Form by reasonable means in a timely manner, at a charge no more
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than the cost of distribution to the recipient; and
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(b) You may distribute such Executable Form under the terms of this
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License, or sublicense it under different terms, provided that the
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license for the Executable Form does not attempt to limit or alter
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the recipients' rights in the Source Code Form under this License.
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3.3. Distribution of a Larger Work
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You may create and distribute a Larger Work under terms of Your choice,
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provided that You also comply with the requirements of this License for
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the Covered Software. If the Larger Work is a combination of Covered
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Software with a work governed by one or more Secondary Licenses, and the
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Covered Software is not Incompatible With Secondary Licenses, this
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License permits You to additionally distribute such Covered Software
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under the terms of such Secondary License(s), so that the recipient of
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the Larger Work may, at their option, further distribute the Covered
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Software under the terms of either this License or such Secondary
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License(s).
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3.4. Notices
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You may not remove or alter the substance of any license notices
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(including copyright notices, patent notices, disclaimers of warranty,
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or limitations of liability) contained within the Source Code Form of
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the Covered Software, except that You may alter any license notices to
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the extent required to remedy known factual inaccuracies.
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3.5. Application of Additional Terms
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You may choose to offer, and to charge a fee for, warranty, support,
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indemnity or liability obligations to one or more recipients of Covered
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Software. However, You may do so only on Your own behalf, and not on
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behalf of any Contributor. You must make it absolutely clear that any
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such warranty, support, indemnity, or liability obligation is offered by
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You alone, and You hereby agree to indemnify every Contributor for any
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liability incurred by such Contributor as a result of warranty, support,
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indemnity or liability terms You offer. You may include additional
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disclaimers of warranty and limitations of liability specific to any
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jurisdiction.
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4. Inability to Comply Due to Statute or Regulation
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---------------------------------------------------
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If it is impossible for You to comply with any of the terms of this
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License with respect to some or all of the Covered Software due to
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statute, judicial order, or regulation then You must: (a) comply with
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the terms of this License to the maximum extent possible; and (b)
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describe the limitations and the code they affect. Such description must
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be placed in a text file included with all distributions of the Covered
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Software under this License. Except to the extent prohibited by statute
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or regulation, such description must be sufficiently detailed for a
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recipient of ordinary skill to be able to understand it.
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5. Termination
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--------------
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5.1. The rights granted under this License will terminate automatically
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if You fail to comply with any of its terms. However, if You become
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compliant, then the rights granted under this License from a particular
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Contributor are reinstated (a) provisionally, unless and until such
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Contributor explicitly and finally terminates Your grants, and (b) on an
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ongoing basis, if such Contributor fails to notify You of the
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non-compliance by some reasonable means prior to 60 days after You have
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come back into compliance. Moreover, Your grants from a particular
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Contributor are reinstated on an ongoing basis if such Contributor
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notifies You of the non-compliance by some reasonable means, this is the
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first time You have received notice of non-compliance with this License
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from such Contributor, and You become compliant prior to 30 days after
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Your receipt of the notice.
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5.2. If You initiate litigation against any entity by asserting a patent
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infringement claim (excluding declaratory judgment actions,
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counter-claims, and cross-claims) alleging that a Contributor Version
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directly or indirectly infringes any patent, then the rights granted to
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You by any and all Contributors for the Covered Software under Section
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2.1 of this License shall terminate.
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5.3. In the event of termination under Sections 5.1 or 5.2 above, all
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end user license agreements (excluding distributors and resellers) which
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have been validly granted by You or Your distributors under this License
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prior to termination shall survive termination.
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************************************************************************
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* *
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* 6. Disclaimer of Warranty *
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* ------------------------- *
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* *
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* Covered Software is provided under this License on an "as is" *
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* basis, without warranty of any kind, either expressed, implied, or *
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* statutory, including, without limitation, warranties that the *
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* Covered Software is free of defects, merchantable, fit for a *
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* particular purpose or non-infringing. The entire risk as to the *
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* quality and performance of the Covered Software is with You. *
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* Should any Covered Software prove defective in any respect, You *
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* (not any Contributor) assume the cost of any necessary servicing, *
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* repair, or correction. This disclaimer of warranty constitutes an *
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* essential part of this License. No use of any Covered Software is *
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* authorized under this License except under this disclaimer. *
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* *
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************************************************************************
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************************************************************************
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* *
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* 7. Limitation of Liability *
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* -------------------------- *
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* *
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* Under no circumstances and under no legal theory, whether tort *
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* (including negligence), contract, or otherwise, shall any *
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* Contributor, or anyone who distributes Covered Software as *
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* permitted above, be liable to You for any direct, indirect, *
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* special, incidental, or consequential damages of any character *
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* including, without limitation, damages for lost profits, loss of *
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* goodwill, work stoppage, computer failure or malfunction, or any *
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* and all other commercial damages or losses, even if such party *
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* shall have been informed of the possibility of such damages. This *
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* limitation of liability shall not apply to liability for death or *
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* personal injury resulting from such party's negligence to the *
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* extent applicable law prohibits such limitation. Some *
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* jurisdictions do not allow the exclusion or limitation of *
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* incidental or consequential damages, so this exclusion and *
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* limitation may not apply to You. *
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* *
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************************************************************************
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8. Litigation
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-------------
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Any litigation relating to this License may be brought only in the
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courts of a jurisdiction where the defendant maintains its principal
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place of business and such litigation shall be governed by laws of that
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jurisdiction, without reference to its conflict-of-law provisions.
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Nothing in this Section shall prevent a party's ability to bring
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cross-claims or counter-claims.
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9. Miscellaneous
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----------------
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This License represents the complete agreement concerning the subject
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matter hereof. If any provision of this License is held to be
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unenforceable, such provision shall be reformed only to the extent
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necessary to make it enforceable. Any law or regulation which provides
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that the language of a contract shall be construed against the drafter
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shall not be used to construe this License against a Contributor.
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10. Versions of the License
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---------------------------
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10.1. New Versions
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Mozilla Foundation is the license steward. Except as provided in Section
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10.3, no one other than the license steward has the right to modify or
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publish new versions of this License. Each version will be given a
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distinguishing version number.
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10.2. Effect of New Versions
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You may distribute the Covered Software under the terms of the version
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of the License under which You originally received the Covered Software,
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or under the terms of any subsequent version published by the license
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steward.
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10.3. Modified Versions
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If you create software not governed by this License, and you want to
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create a new license for such software, you may create and use a
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modified version of this License if you rename the license and remove
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any references to the name of the license steward (except to note that
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such modified license differs from this License).
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10.4. Distributing Source Code Form that is Incompatible With Secondary
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Licenses
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If You choose to distribute Source Code Form that is Incompatible With
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Secondary Licenses under the terms of this version of the License, the
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notice described in Exhibit B of this License must be attached.
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Exhibit A - Source Code Form License Notice
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-------------------------------------------
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This Source Code Form is subject to the terms of the Mozilla Public
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License, v. 2.0. If a copy of the MPL was not distributed with this
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file, You can obtain one at http://mozilla.org/MPL/2.0/.
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If it is not possible or desirable to put the notice in a particular
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file, then You may include the notice in a location (such as a LICENSE
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file in a relevant directory) where a recipient would be likely to look
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for such a notice.
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You may add additional accurate notices of copyright ownership.
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Exhibit B - "Incompatible With Secondary Licenses" Notice
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---------------------------------------------------------
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This Source Code Form is "Incompatible With Secondary Licenses", as
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defined by the Mozilla Public License, v. 2.0.
+25
README.md
+25
README.md
···
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# Zfetch
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*Better input handling for Zdog, the pseudo-3D engine.*
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## Status
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Currently un-minified and under active development.
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## About Zfetch
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I'm working on an application built on Zdog and I needed better input handling
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that was aware of Zdog and its quirks. What Zfetch does is allow you to set
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event event handlers for `click` and `pointerdown/move/up` events and have
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those handlers be aware of exactly which Zdog shape the mouse is over.
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In the future, I'd like to support setting event handlers on arbitrary Zdog
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objects and have events bubble up the Zdog hierarchy. Currently, all events
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pass through the root SVG or Canvas and must be delegated from there.
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Current limitations:
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- Canvas is not supported, only SVG. (This wouldn't be a large task)
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Pull requests and suggestions are welcome!
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This is currently being actively developed alongside [Zoodle](https://github.com/different55/zoodle).
+270
zfetch.js
+270
zfetch.js
···
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/** Zfetch
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* Input handler for Zdog
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*/
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( function( root, factory ) {
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// module definition
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if ( typeof module == 'object' && module.exports ) {
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// CommonJS
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module.exports = factory();
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} else {
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// browser global
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root.Zfetch = factory();
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}
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}( this, function factory() {
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var DEBUG = false;
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if ( typeof window == 'undefined' || !window.PointerEvent ) {
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console.error( 'Zfetch requires PointerEvent support.' );
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return;
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}
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function noop() {}
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Zfetch.prototype.rotateStart = function( pointer ) {
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this.rotateStartX = this.scene.rotate.x;
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this.rotateStartY = this.scene.rotate.y;
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}
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Zfetch.prototype.rotateMove = function( pointer, target, moveX, moveY ) {
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let displaySize = Math.min( this.scene.width, this.scene.height );
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let moveRY = moveX / displaySize * Math.PI * Zdog.TAU;
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let moveRX = moveY / displaySize * Math.PI * Zdog.TAU;
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this.scene.rotate.x = this.rotateStartX - moveRX;
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this.scene.rotate.y = this.rotateStartY - moveRY;
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}
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function Zfetch( options ) {
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this.init( options || {} );
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}
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Zfetch.prototype.init = function( options ) {
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this.click = options.click || noop;
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this.dragStart = options.dragStart || (options.dragRotate ? this.rotateStart : noop);
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this.dragMove = options.dragMove || (options.dragRotate ? this.rotateMove : noop);
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this.dragEnd = options.dragEnd || noop;
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this.capture = options.capture || false;
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this.dragRotate = options.dragRotate;
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this.scene = options.scene;
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this.startElement = options.scene.element;
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this.bindListeners( this.startElement );
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this.initGhost( options.scene );
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};
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Zfetch.prototype.bindListeners = function( element ) {
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element = this.getQueryElement( element );
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if ( !element ) {
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console.error( 'Zfetch: startElement not found: ' + element );
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return;
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}
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// disable browser gestures
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// issue #53 on Zdog GitHub
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element.style.touchAction = 'none';
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element.addEventListener( 'pointerdown', this );
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};
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Zfetch.prototype.getQueryElement = function( element ) {
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if ( typeof element == 'string' ) {
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// with string, use query selector
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return document.querySelector( element );
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}
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return element;
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};
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Zfetch.prototype.handleEvent = function( event ) {
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if (DEBUG) console.log(event.type, event);
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var method = this[ 'on' + event.type ];
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if ( method ) {
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method.call( this, event );
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}
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};
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Zfetch.prototype.down = function( event ) {
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if ( !event.isPrimary ) return;
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if (this.capture) {
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this.startElement.setPointerCapture( event.pointerId );
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}
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this.downX = event.pageX;
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this.downY = event.pageY;
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this.moveX = 0;
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this.moveY = 0;
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this.downId = event.pointerId;
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this.dragEvent = event;
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this.onpointermove = this.moveDeadzone;
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this.startElement.addEventListener( 'pointermove', this );
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this.startElement.addEventListener( 'pointerup', this );
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this.startElement.addEventListener( 'pointercancel', this );
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};
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Zfetch.prototype.move = function( event ) {
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if ( event.pointerId != this.downId ) return;
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this.moveX = event.pageX - this.downX;
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this.moveY = event.pageY - this.downY;
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this.dispatchDragMove( event );
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};
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+
Zfetch.prototype.moveDeadzone = function( event ) {
112
+
if ( event.pointerId != this.downId ) return;
113
+
114
+
let moveX = event.pageX - this.downX;
115
+
let moveY = event.pageY - this.downY;
116
+
117
+
var deadzone = 5;
118
+
if ( event.pointerType == 'mouse' )
119
+
deadzone = -1;
120
+
if ( Math.abs( moveX ) > deadzone || Math.abs( moveY ) > deadzone ) {
121
+
this.dispatchDragStart( this.dragEvent );
122
+
this.onpointermove = this.move;
123
+
this.onpointermove( event );
124
+
}
125
+
}
126
+
127
+
Zfetch.prototype.up = function( event ) {
128
+
if ( event.pointerId != this.downId ) return;
129
+
130
+
if (DEBUG) console.log("going uuuuup", event);
131
+
132
+
if ( this.moveX || this.moveY ) {
133
+
this.dispatchDragEnd( event );
134
+
} else {
135
+
this.dispatchClick( event );
136
+
}
137
+
138
+
this.startElement.removeEventListener( 'pointermove', this );
139
+
this.startElement.removeEventListener( 'pointerup', this );
140
+
this.startElement.removeEventListener( 'pointercancel', this );
141
+
};
142
+
143
+
Zfetch.prototype.onpointerdown = Zfetch.prototype.down;
144
+
Zfetch.prototype.onpointermove = Zfetch.prototype.move;
145
+
Zfetch.prototype.onpointerup =
146
+
Zfetch.prototype.onpointercancel = Zfetch.prototype.up;
147
+
148
+
Zfetch.prototype.dispatchDragStart = function( event ) {
149
+
this.dragEvent = null;
150
+
this.dispatch( "dragStart", event );
151
+
};
152
+
153
+
Zfetch.prototype.dispatchDragMove = function( event ) {
154
+
this.dispatch( "dragMove", event );
155
+
};
156
+
157
+
Zfetch.prototype.dispatchDragEnd = function( event ) {
158
+
this.dispatch( "dragEnd", event );
159
+
};
160
+
161
+
Zfetch.prototype.dispatchClick = function( event ) {
162
+
this.dispatch( "click", event );
163
+
};
164
+
165
+
Zfetch.prototype.dispatch = function( event, pointer ) {
166
+
if (DEBUG) console.log("dispatching", event, pointer);
167
+
var moveX = this.moveX;
168
+
var moveY = this.moveY;
169
+
var target = this.getTargetShape( pointer );
170
+
target.element = this.startElement;
171
+
if (DEBUG) console.log("pointer, target, x, y", pointer, target, moveX, moveY);
172
+
this[ event ]( pointer, target, moveX, moveY );
173
+
};
174
+
175
+
Zfetch.prototype.initGhost = function( scene ) {
176
+
if ( this.scene.isSvg ) {
177
+
this.initSvgGhost( scene );
178
+
} else {
179
+
this.initCanvasGhost( scene );
180
+
}
181
+
this.updateGhost();
182
+
};
183
+
184
+
Zfetch.prototype.initSvgGhost = function() {
185
+
this.ghostElem = document.createElement( 'svg' );
186
+
this.ghostElem.setAttribute( 'width', this.scene.element.clientWidth );
187
+
this.ghostElem.setAttribute( 'height', this.scene.element.clientHeight );
188
+
/*this.ghostElem.style.display = "none";
189
+
this.ghostElem = document.body.appendChild( this.ghostElem );*/
190
+
};
191
+
192
+
Zfetch.prototype.updateGhost = function() {
193
+
this.ghost = this.scene.copyGraph({ element: this.ghostElem });
194
+
this.ghost.updateGraph();
195
+
for ( let i = 0; i < this.ghost.flatGraph.length; i++ ) {
196
+
const shape = this.ghost.flatGraph[i];
197
+
shape.twin = this.scene.flatGraph[i];
198
+
shape.color = "#" + (i).toString(16).padStart(6, "0");
199
+
let faces = [
200
+
"leftFace",
201
+
"rightFace",
202
+
"topFace",
203
+
"bottomFace",
204
+
"frontFace",
205
+
"rearFace",
206
+
"backface"
207
+
];
208
+
// override overridden faces
209
+
for ( let face of faces ) {
210
+
if ( shape.twin[ face ] )
211
+
shape[ face ] = shape.color;
212
+
}
213
+
}
214
+
this.ghost.renderGraph();
215
+
};
216
+
217
+
Zfetch.prototype.getSvgPath = function( root, element ) {
218
+
const path = [];
219
+
let current = element;
220
+
221
+
while ( current !== root ) {
222
+
const parent = current.parentElement;
223
+
const index = Array.from( parent.children ).indexOf( current );
224
+
path.unshift( index );
225
+
current = parent;
226
+
}
227
+
228
+
return path;
229
+
};
230
+
231
+
Zfetch.prototype.getElementByPath = function( root, path ) {
232
+
let current = root;
233
+
234
+
for ( const index of path ) {
235
+
current = current.children[ index ];
236
+
}
237
+
238
+
return current;
239
+
};
240
+
241
+
// TODO: This isn't returning correctly for the surface of cylinders.
242
+
Zfetch.prototype.getTargetShape = function( pointer ) {
243
+
if ( this.scene.isSvg )
244
+
return this.getTargetShapeSvg( pointer );
245
+
246
+
return this.getTargetShapeCanvas( pointer );
247
+
};
248
+
249
+
Zfetch.prototype.getTargetShapeSvg = function( pointer ) {
250
+
// happy path: if we're on an svg
251
+
if ( pointer.target.tagName == "svg" )
252
+
return this.scene;
253
+
254
+
this.updateGhost();
255
+
let path = this.getSvgPath( this.scene.element, pointer.target );
256
+
let ghostElem = this.getElementByPath( this.ghostElem, path );
257
+
let color = ghostElem.getAttribute( "fill" );
258
+
if ( color == "none" )
259
+
color = ghostElem.getAttribute( "stroke" );
260
+
if ( color == "none" )
261
+
return this.scene;
262
+
let ghostShape = Array.from( this.ghost.flatGraph ).find( shape => shape.color === color );
263
+
if ( !ghostShape )
264
+
return this.scene;
265
+
return ghostShape.twin;
266
+
};
267
+
268
+
return Zfetch;
269
+
270
+
}) );