cameraSchema.h

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//
// Copyright 2021 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
//    names, trademarks, service marks, or product names of the Licensor
//    and its affiliates, except as required to comply with Section 4(c) of
//    the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
////////////////////////////////////////////////////////////////////////
// This file is generated by a script.  Do not edit directly.  Edit the
// schema.template.h file to make changes.

#ifndef PXR_IMAGING_HD_CAMERA_SCHEMA_H
#define PXR_IMAGING_HD_CAMERA_SCHEMA_H

#include "pxr/imaging/hd/api.h"

#include "pxr/imaging/hd/schema.h" 

PXR_NAMESPACE_OPEN_SCOPE

//-----------------------------------------------------------------------------

#define HDCAMERA_SCHEMA_TOKENS \
    (camera) \
    (projection) \
    (horizontalAperture) \
    (verticalAperture) \
    (horizontalApertureOffset) \
    (verticalApertureOffset) \
    (focalLength) \
    (clippingRange) \
    (perspective) \
    (orthographic) \

TF_DECLARE_PUBLIC_TOKENS(HdCameraSchemaTokens, HD_API,
    HDCAMERA_SCHEMA_TOKENS);

//-----------------------------------------------------------------------------

class HdCameraSchema : public HdSchema
{
public:
    HdCameraSchema(HdContainerDataSourceHandle container)
    : HdSchema(container) {}

    //ACCESSORS

    HD_API
    HdTokenDataSourceHandle GetProjection();
    HD_API
    HdFloatDataSourceHandle GetHorizontalAperture();
    HD_API
    HdFloatDataSourceHandle GetVerticalAperture();
    HD_API
    HdFloatDataSourceHandle GetHorizontalApertureOffset();
    HD_API
    HdFloatDataSourceHandle GetVerticalApertureOffset();
    HD_API
    HdFloatDataSourceHandle GetFocalLength();
    HD_API
    HdVec2fDataSourceHandle GetClippingRange();

    // RETRIEVING AND CONSTRUCTING

    /// Builds a container data source which includes the provided child data
    /// sources. Parameters with nullptr values are excluded. This is a
    /// low-level interface. For cases in which it's desired to define
    /// the container with a sparse set of child fields, the Builder class
    /// is often more convenient and readable.
    HD_API
    static HdContainerDataSourceHandle
    BuildRetained(
        const HdTokenDataSourceHandle &projection,
        const HdFloatDataSourceHandle &horizontalAperture,
        const HdFloatDataSourceHandle &verticalAperture,
        const HdFloatDataSourceHandle &horizontalApertureOffset,
        const HdFloatDataSourceHandle &verticalApertureOffset,
        const HdFloatDataSourceHandle &focalLength,
        const HdVec2fDataSourceHandle &clippingRange
    );

    /// \class HdCameraSchema::Builder
    /// 
    /// Utility class for setting sparse sets of child data source fields to be
    /// filled as arguments into BuildRetained. Because all setter methods
    /// return a reference to the instance, this can be used in the "builder
    /// pattern" form.
    class Builder
    {
    public:
        HD_API
        Builder &SetProjection(
            const HdTokenDataSourceHandle &projection);
        HD_API
        Builder &SetHorizontalAperture(
            const HdFloatDataSourceHandle &horizontalAperture);
        HD_API
        Builder &SetVerticalAperture(
            const HdFloatDataSourceHandle &verticalAperture);
        HD_API
        Builder &SetHorizontalApertureOffset(
            const HdFloatDataSourceHandle &horizontalApertureOffset);
        HD_API
        Builder &SetVerticalApertureOffset(
            const HdFloatDataSourceHandle &verticalApertureOffset);
        HD_API
        Builder &SetFocalLength(
            const HdFloatDataSourceHandle &focalLength);
        HD_API
        Builder &SetClippingRange(
            const HdVec2fDataSourceHandle &clippingRange);

        /// Returns a container data source containing the members set thus far.
        HD_API
        HdContainerDataSourceHandle Build();

    private:
        HdTokenDataSourceHandle _projection;
        HdFloatDataSourceHandle _horizontalAperture;
        HdFloatDataSourceHandle _verticalAperture;
        HdFloatDataSourceHandle _horizontalApertureOffset;
        HdFloatDataSourceHandle _verticalApertureOffset;
        HdFloatDataSourceHandle _focalLength;
        HdVec2fDataSourceHandle _clippingRange;
    };

    /// Retrieves a container data source with the schema's default name token
    /// "camera" from the parent container and constructs a
    /// HdCameraSchema instance.
    /// Because the requested container data source may not exist, the result
    /// should be checked with IsDefined() or a bool comparison before use.
    HD_API
    static HdCameraSchema GetFromParent(
        const HdContainerDataSourceHandle &fromParentContainer);

    /// Returns an HdDataSourceLocator (relative to the prim-level data source)
    /// where the container representing this schema is found by default.
    HD_API
    static const HdDataSourceLocator &GetDefaultLocator();

    /// Returns token data source for use as projection value.
    /// Values of...
    /// - HdCameraSchemaTokens->perspective
    /// - HdCameraSchemaTokens->orthographic
    ///     ...will be stored statically and reused for future calls.
    HD_API
    static HdTokenDataSourceHandle BuildProjectionDataSource(
        const TfToken &projection);

};

PXR_NAMESPACE_CLOSE_SCOPE

#endif