Source/Samples/34_DynamicGeometry/DynamicGeometry.h - master - Metallist64/rbfx

Source/Samples/34_DynamicGeometry/DynamicGeometry.h
89 строк3 KB
gleblebedev
Free fly controller and multitouch adapter (#397)
02 май 2022, 23:11
02 май 2022, 23:118e17a96
//
// Copyright (c) 2008-2022 the Urho3D project.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#pragma once

#include "Sample.h"

namespace Urho3D
{

class Node;
class Scene;

}

/// Dynamic geometry example.
/// This sample demonstrates:
///     - Cloning a Model resource
///     - Modifying the vertex buffer data of the cloned models at runtime to efficiently animate them
///     - Creating a Model resource and its buffer data from scratch
class DynamicGeometry : public Sample
{
    URHO3D_OBJECT(DynamicGeometry, Sample);

public:
    /// Construct.
    explicit DynamicGeometry(Context* context);

    /// Setup after engine initialization and before running the main loop.
    void Start() override;

protected:
    /// Return XML patch instructions for screen joystick layout for a specific sample app, if any.
    ea::string GetScreenJoystickPatchString() const override { return
        "<patch>"
        "    <remove sel=\"/element/element[./attribute[@name='Name' and @value='Button0']]/attribute[@name='Is Visible']\" />"
        "    <replace sel=\"/element/element[./attribute[@name='Name' and @value='Button0']]/element[./attribute[@name='Name' and @value='Label']]/attribute[@name='Text']/@value\">Animation</replace>"
        "    <add sel=\"/element/element[./attribute[@name='Name' and @value='Button0']]\">"
        "        <element type=\"Text\">"
        "            <attribute name=\"Name\" value=\"KeyBinding\" />"
        "            <attribute name=\"Text\" value=\"SPACE\" />"
        "        </element>"
        "    </add>"
        "</patch>";
    }

private:
    /// Construct the scene content.
    void CreateScene();
    /// Construct an instruction text to the UI.
    void CreateInstructions();
    /// Set up a viewport for displaying the scene.
    void SetupViewport();

    /// Animate the vertex data of the objects.
    void AnimateObjects(float timeStep);
    /// Handle the logic update event.
    void Update(float timeStep) override;

    /// Cloned models' vertex buffers that we will animate.
    ea::vector<SharedPtr<VertexBuffer> > animatingBuffers_;
    /// Original vertex positions for the sphere model.
    ea::vector<Vector3> originalVertices_;
    /// If the vertices are duplicates, indices to the original vertices (to allow seamless animation.)
    ea::vector<unsigned> vertexDuplicates_;
    /// Animation flag.
    bool animate_;
    /// Animation's elapsed time.
    float time_;
};