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Diffstat (limited to 'tests/manual/compute-manual/ParticlesScene.qml')
| -rw-r--r-- | tests/manual/compute-manual/ParticlesScene.qml | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/tests/manual/compute-manual/ParticlesScene.qml b/tests/manual/compute-manual/ParticlesScene.qml new file mode 100644 index 000000000..68572f6b4 --- /dev/null +++ b/tests/manual/compute-manual/ParticlesScene.qml @@ -0,0 +1,200 @@ +/**************************************************************************** +** +** Copyright (C) 2019 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 2.14 +import Qt3D.Render 2.14 +import Qt3D.Extras 2.14 +import Qt3D.Input 2.14 + +Entity { + + property alias computeMode: particlesComputeJob.runType + + function triggerCompute(frames) { + particlesComputeJob.trigger(frames) + } + + components: [ + RenderSettings { + ComputeFrameGraph { + camera: sceneCamera + } + // explicitly set RenderingPolicy to AlwaysRender, as changes in the + // scene won't be reflected in actual Qt scene-graph changes (due to + // GPU compute calls) + renderPolicy: RenderSettings.Always + }, + InputSettings {} + ] + + FirstPersonCameraController { camera: sceneCamera } + + Camera { + id: sceneCamera + projectionType: CameraLens.PerspectiveProjection + viewCenter: Qt.vector3d(0, 0, 0) + position: Qt.vector3d(0, 20, -800) + nearPlane: 0.1 + farPlane: 1000 + fieldOfView: 60 + } + + property int particlesCount: 1024 * 1024 + readonly property int floatSize: 4 + + function buildParticlesBuffer() { + var byteSizeOfParticleData = 8; + var bufferData = new Float32Array(particlesCount * byteSizeOfParticleData); + for (var x = 0; x < 1024; ++x) { + for (var z = 0; z < 1024; ++z) { + var i = x * 1024 + z; + var positionIdx = i * byteSizeOfParticleData; + var colorIdx = i * byteSizeOfParticleData + 8; + + bufferData[positionIdx] = -1024 + x * 2; + bufferData[positionIdx + 1] = 0; + bufferData[positionIdx + 2] = -1024 + z * 2; + bufferData[positionIdx + 3] = 1.0; + + bufferData[colorIdx] = 0.25 + Math.sin(x / 1024) * 0.75; + bufferData[colorIdx + 1] = 0.25 + Math.sin(z / 1024) * 0.75; + bufferData[colorIdx + 2] = 0.25 + Math.sin(x / 1024) * 0.75; + bufferData[colorIdx + 3] = 1.0; + } + } + return bufferData + } + + Buffer { + id: particleBuffer + type: Buffer.VertexBuffer + // struct ParticleData + // { + // vec3 position; // Aligned to 4 floats + // vec3 color; // Aligned to 4 floats + // }; + data: buildParticlesBuffer() + } + + Attribute { + id: particlePositionDataAttribute + name: "particlePosition" + attributeType: Attribute.VertexAttribute + vertexBaseType: Attribute.Float + vertexSize: 3 + divisor: 1 + byteStride: 8 * floatSize + buffer: particleBuffer + } + + Attribute { + id: particleColorDataAttribute + name: "particleColor" + attributeType: Attribute.VertexAttribute + vertexBaseType: Attribute.Float + vertexSize: 3 + divisor: 1 + byteOffset: 4 * floatSize + byteStride: 8 * floatSize + buffer: particleBuffer + } + + ComputeMaterial { + id: computeMaterial + dataBuffer: particleBuffer + } + + ComputeCommand { + id: particlesComputeJob + onRunTypeChanged: { + // Don't forget to re-enable the command + // when switching back to continuous + if (runType === ComputeCommand.Continuous) + enabled = true + } + } + + Entity { + id: particleComputeEntity + components: [ + particlesComputeJob, + computeMaterial + ] + } + + SphereGeometry { + id: sphereGeometry + rings: 10 + slices: 10 + radius: 1 + // Additional Attributes + attributes: [ + particlePositionDataAttribute, + particleColorDataAttribute + ] + } + + Entity { + id: particleRenderEntity + readonly property GeometryRenderer particlesRenderer: GeometryRenderer { + instanceCount: particlesCount + indexOffset: 0 + firstInstance: 0 + primitiveType: GeometryRenderer.Triangles + geometry: sphereGeometry + } + + components: [ + particlesRenderer, + computeMaterial + ] + } +} + |