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Diffstat (limited to 'examples/qt3d/compute-particles/ParticlesScene.qml')
| -rw-r--r-- | examples/qt3d/compute-particles/ParticlesScene.qml | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/examples/qt3d/compute-particles/ParticlesScene.qml b/examples/qt3d/compute-particles/ParticlesScene.qml new file mode 100644 index 000000000..f1472e178 --- /dev/null +++ b/examples/qt3d/compute-particles/ParticlesScene.qml @@ -0,0 +1,230 @@ +/**************************************************************************** +** +** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the Qt3D module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL3$ +** 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 http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPLv3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or later as published by the Free +** Software Foundation and appearing in the file LICENSE.GPL included in +** the packaging of this file. Please review the following information to +** ensure the GNU General Public License version 2.0 requirements will be +** met: http://www.gnu.org/licenses/gpl-2.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +import Qt3D.Core 2.0 +import Qt3D.Render 2.0 + +Entity { + property alias particleStep: computeMaterial.particleStep + property alias finalCollisionFactor: computeMaterial.finalCollisionFactor + + readonly property int _SPHERE: 0 + readonly property int _CUBE: 1 + readonly property int _CYLINDER: 2 + readonly property int _TORUS: 3 + + property int particlesShape: _SPHERE + + signal reset() + + components: [ + FrameGraph { + ComputeFrameGraph { + camera: sceneCamera + } + } + ] + + Configuration { + controlledCamera: sceneCamera + } + + Camera { + id: sceneCamera + projectionType: CameraLens.PerspectiveProjection + viewCenter: Qt.vector3d(0, 0, 0) + position: Qt.vector3d(0, 0, -800) + nearPlane: 0.1 + farPlane: 1000 + fieldOfView: 25 + aspectRatio: 1.33 + } + + property int particlesCount: 50 * 1024 + readonly property int floatSize: 4 + + function buildParticlesBuffer() { + var bufferData = new Float32Array(particlesCount * 4 * 3); + var factor = 500.0; + for (var i = 0; i < particlesCount; ++i) { + var positionIdx = i * 12; + var velocityIdx = i * 12 + 4; + var colorIdx = i * 12 + 8; + + for (var j = 0; j < 3; ++j) { + bufferData[positionIdx + j] = (Math.random() - 0.5) * factor; + bufferData[velocityIdx + j] = Math.random() * 2.0; + bufferData[colorIdx + j] = 0.75 + Math.sin(((i / 1024.0) + j * 0.333) * 6.0) * 0.25; + } + + bufferData[positionIdx + 3] = 1.0; + bufferData[velocityIdx + 3] = 0.0; + bufferData[colorIdx + 3] = 1.0; + } + return bufferData + } + + Buffer { + id: particleBuffer + type: Buffer.VertexBuffer + // struct ParticleData + // { + // vec3 position; // Aligned to 4 floats + // vec3 velocity; // Aligned to 4 floats + // vec3 color; // Aligned to 4 floats + // }; + data: buildParticlesBuffer() + } + + onReset : { + particleBuffer.data = buildParticlesBuffer() + } + + Attribute { + id: particlePositionDataAttribute + name: "particlePosition" + attributeType: Attribute.VertexAttribute + dataType: Attribute.Float + dataSize: 3 + divisor: 1 + byteStride: 12 * floatSize + buffer: particleBuffer + } + + Attribute { + id: particleColorDataAttribute + name: "particleColor" + attributeType: Attribute.VertexAttribute + dataType: Attribute.Float + dataSize: 3 + divisor: 1 + byteOffset: 8 * floatSize + byteStride: 12 * floatSize + buffer: particleBuffer + } + + ComputeMaterial { + id: computeMaterial + dataBuffer: particleBuffer + } + + Entity { + id: particleComputeEntity + readonly property ComputeJob particlesComputeJob: ComputeJob {} + components: [ + particlesComputeJob, + computeMaterial + ] + } + + SphereGeometry { + id: sphereGeometry + rings: 10 + slices: 10 + radius: 1 + // Additional Attributes + attributes: [ + particlePositionDataAttribute, + particleColorDataAttribute + ] + } + + CuboidGeometry { + id: cubeGeometry + yzMeshResolution: Qt.size(2, 2) + xzMeshResolution: Qt.size(2, 2) + xyMeshResolution: Qt.size(2, 2) + // Additional Attributes + attributes: [ + particlePositionDataAttribute, + particleColorDataAttribute + ] + } + + CylinderGeometry { + id: cylinderGeometry + rings: 10 + slices: 10 + radius: 1 + length: 1.5 + // Additional Attributes + attributes: [ + particlePositionDataAttribute, + particleColorDataAttribute + ] + } + + TorusGeometry { + id: torusGeometry + rings: 10 + slices: 10 + radius: 1 + minorRadius: 0.5 + // Additional Attributes + attributes: [ + particlePositionDataAttribute, + particleColorDataAttribute + ] + } + + Entity { + id: particleRenderEntity + readonly property GeometryRenderer particlesRenderer: GeometryRenderer { + instanceCount: particlesCount + baseVertex: 0 + baseInstance: 0 + primitiveType: GeometryRenderer.Triangles + geometry: { + switch (particlesShape) { + case _SPHERE: + return sphereGeometry; + case _CUBE: + return cubeGeometry; + case _CYLINDER: + return cylinderGeometry; + case _TORUS: + return torusGeometry; + } + } + } + + components: [ + particlesRenderer, + computeMaterial + ] + } +} + |