TessellatedWireframeEffect.qml Example File

tessellation-modes/TessellatedWireframeEffect.qml
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import Qt3D 2.0
import Qt3D.Renderer 2.0
import QtQuick 2.1

Effect {
    id: root

    // It's expected that users of this will specify the tessellation control and evaluation
    // shaders and if necessary suitable replacements for the other stages
    property alias vertexShaderCode: program.vertexShaderCode
    property alias tessellationControlShaderCode: program.tessellationControlShaderCode
    property alias tessellationEvaluationShaderCode: program.tessellationEvaluationShaderCode
    property alias geometryShaderCode: program.geometryShaderCode
    property alias fragmentShaderCode: program.fragmentShaderCode
    property alias shaderProgram: program

    parameters: [
        Parameter { name: "ambient";   value: Qt.vector3d( 0.1, 0.1, 0.1 ) },
        Parameter { name: "diffuse";   value: Qt.vector3d( 0.7, 0.7, 0.7 ) },
        Parameter { name: "specular";  value: Qt.vector3d( 0.95, 0.95, 0.95 ) },
        Parameter { name: "shininess"; value: 150.0 }
    ]

    techniques: [
        Technique {
            openGLFilter {
                api: OpenGLFilter.Desktop
                profile: OpenGLFilter.Core
                majorVersion: 4
                minorVersion: 0
            }

            annotations: [ Annotation { 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 {

                    bindings: [
                        ParameterMapping { parameterName: "ambient";  shaderVariableName: "ka"; bindingType: ParameterMapping.Uniform },
                        ParameterMapping { parameterName: "diffuse";  shaderVariableName: "kd"; bindingType: ParameterMapping.Uniform },
                        ParameterMapping { parameterName: "specular"; shaderVariableName: "ks"; bindingType: ParameterMapping.Uniform },

                        // TODO: Support uniform arrays. We want to be able to do (or something similar) and map vectors or lists of values
                        // through to the uniforms
                        ParameterMapping { parameterName: "innerTessLevel"; shaderVariableName: "inner[0]"; bindingType: ParameterMapping.Uniform },
                        ParameterMapping { parameterName: "outerTessLevel"; shaderVariableName: "outer[0]"; bindingType: ParameterMapping.Uniform }
                    ]

                    shaderProgram: ShaderProgram {
                        id: program
                        vertexShaderCode:   loadSource("qrc:/shaders/passthru.vert")
                        geometryShaderCode: loadSource("qrc:/shaders/robustwireframe.geom")
                        fragmentShaderCode: loadSource("qrc:/shaders/phongwireframe.frag")
                    }
                }
            ]
        }
    ]
}

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