/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

import Qt3D.Core 2.0
import Qt3D.Render 2.0

Effect {
    id: root

    property bool wireframe: false

    // These parameters act as default values for the effect. They take
    // priority over any parameters specified in the RenderPasses below
    // (none provided in this example). In turn these parameters can be
    // overwritten by specifying them in a Material that references this
    // effect.
    // The priority order is:
    //
    // Material -> Effect -> Technique -> RenderPass -> GLSL default values
    parameters: [
        Parameter { name: "ka"; value: Qt.vector3d( 0.1, 0.1, 0.1 ) },
        Parameter { name: "kd"; value: Qt.vector3d( 0.7, 0.7, 0.7 ) }
    ]

    techniques: [
        Technique {
            graphicsApiFilter {
                api: GraphicsApiFilter.OpenGL
                profile: GraphicsApiFilter.CoreProfile
                majorVersion: 3
                minorVersion: 2
            }

            filterKeys: [ FilterKey { name: "renderingStyle"; value: "forward" } ]

            parameters: [
                Parameter { name: "light.position"; value: Qt.vector4d( 0.0, 0.0, 0.0, 1.0 ) },
                Parameter { name: "light.intensity"; value: Qt.vector3d( 1.0, 1.0, 1.0 ) },
                Parameter { name: "line.width"; value: 0.8 },
                Parameter { name: "line.color"; value: Qt.vector4d( 1.0, 1.0, 1.0, 1.0 ) }
            ]

            renderPasses: [
                RenderPass {
                    shaderProgram: wireframe ? wireframeShader : standardShader

                    // Disable depth testing and use simple additive blending
                    renderStates: [
                        DepthTest { depthFunction: DepthTest.Always },
                        BlendEquationArguments {
                            sourceRgb: BlendEquationArguments.One
                            destinationRgb: BlendEquationArguments.OneMinusSourceColor
                        }
                    ]

                    ShaderProgram {
                        id: standardShader
                        vertexShaderCode:   loadSource("qrc:/shaders/ribbon.vert")
                        fragmentShaderCode: loadSource("qrc:/shaders/ribbon.frag")
                    }

                    ShaderProgram {
                        id: wireframeShader
                        vertexShaderCode:   loadSource("qrc:/shaders/ribbon.vert")
                        geometryShaderCode: loadSource("qrc:/shaders/robustwireframe.geom")
                        fragmentShaderCode: loadSource("qrc:/shaders/ribbonwireframe.frag")
                    }
                }
            ]
        }
    ]
}