Add manual test for indirect drawing

Change-Id: I964d4e0a512082efe4891e170e56037e24dd9842
Reviewed-by: Kevin Ottens <kevin.ottens@kdab.com>

2 files changed, 410 insertions, 0 deletions

diff --git a/tests/manual/custom-mesh-cpp-indirect/custom-mesh-cpp-indirect.pro b/tests/manual/custom-mesh-cpp-indirect/custom-mesh-cpp-indirect.pro
new file mode 100644
index 000000000..04b2627cf
--- /dev/null
+++ b/tests/manual/custom-mesh-cpp-indirect/custom-mesh-cpp-indirect.pro
@@ -0,0 +1,8 @@
+!include( ../manual.pri ) {
+    error( "Couldn't find the manual.pri file!" )
+}
+
+QT += 3dcore 3drender 3dinput 3dextras
+
+SOURCES += \
+    main.cpp
diff --git a/tests/manual/custom-mesh-cpp-indirect/main.cpp b/tests/manual/custom-mesh-cpp-indirect/main.cpp
new file mode 100644
index 000000000..bac4a7227
--- /dev/null
+++ b/tests/manual/custom-mesh-cpp-indirect/main.cpp
@@ -0,0 +1,402 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QGuiApplication>
+
+#include <Qt3DCore/QEntity>
+#include <Qt3DRender/QCamera>
+#include <Qt3DRender/QCameraLens>
+#include <Qt3DCore/QTransform>
+#include <Qt3DCore/QAspectEngine>
+
+#include <Qt3DInput/QInputAspect>
+
+#include <Qt3DRender/QRenderStateSet>
+#include <Qt3DRender/QRenderAspect>
+#include <Qt3DExtras/QForwardRenderer>
+#include <Qt3DExtras/QPerVertexColorMaterial>
+
+#include <Qt3DRender/QGeometryRenderer>
+#include <Qt3DRender/QGeometry>
+#include <Qt3DRender/QAttribute>
+#include <Qt3DRender/QBuffer>
+
+#include <QPropertyAnimation>
+#include <Qt3DExtras/qt3dwindow.h>
+#include <Qt3DExtras/qorbitcameracontroller.h>
+
+namespace {
+
+struct IndirectElementDrawBuffer{ // Element Indirect
+    uint count;
+    uint instancesCount;
+    uint firstIndex;
+    uint baseVertex;
+    uint baseInstance;
+};
+
+struct IndirectArrayDrawBuffer{ // Array Indirect
+    uint count;
+    uint instancesCount;
+    uint first;
+    uint baseInstance;
+};
+
+} // anonymous
+
+int main(int argc, char* argv[])
+{
+    QGuiApplication app(argc, argv);
+    Qt3DExtras::Qt3DWindow view;
+    view.defaultFrameGraph()->setClearColor(QColor::fromRgbF(0.0, 0.5, 1.0, 1.0));
+
+    // Root entity
+    Qt3DCore::QEntity *rootEntity = new Qt3DCore::QEntity();
+
+    // Camera
+    Qt3DRender::QCamera *cameraEntity = view.camera();
+
+    cameraEntity->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
+    cameraEntity->setPosition(QVector3D(0, 0, 40.0f));
+    cameraEntity->setUpVector(QVector3D(0, 1, 0));
+    cameraEntity->setViewCenter(QVector3D(0, 0, 0));
+
+    // For camera controls
+    Qt3DExtras::QOrbitCameraController *camController = new Qt3DExtras::QOrbitCameraController(rootEntity);
+    camController->setCamera(cameraEntity);
+
+    // Material
+    Qt3DRender::QMaterial *material = new Qt3DExtras::QPerVertexColorMaterial(rootEntity);
+
+    // vec3 for position
+    // vec3 for colors
+    // vec3 for normals
+
+    /*          2
+               /|\
+              / | \
+             / /3\ \
+             0/___\ 1
+    */
+    // Vertices
+    QVector3D v0(-1.0f, 0.0f, -1.0f);
+    QVector3D v1(1.0f, 0.0f, -1.0f);
+    QVector3D v2(0.0f, 1.0f, 0.0f);
+    QVector3D v3(0.0f, 0.0f, 1.0f);
+
+    // Faces Normals
+    QVector3D n023 = QVector3D::normal(v0, v2, v3);
+    QVector3D n012 = QVector3D::normal(v0, v1, v2);
+    QVector3D n310 = QVector3D::normal(v3, v1, v0);
+    QVector3D n132 = QVector3D::normal(v1, v3, v2);
+
+    // Vector Normals
+    QVector3D n0 = QVector3D(n023 + n012 + n310).normalized();
+    QVector3D n1 = QVector3D(n132 + n012 + n310).normalized();
+    QVector3D n2 = QVector3D(n132 + n012 + n023).normalized();
+    QVector3D n3 = QVector3D(n132 + n310 + n023).normalized();
+
+    // Colors
+    QVector3D red(1.0f, 0.0f, 0.0f);
+    QVector3D green(0.0f, 1.0f, 0.0f);
+    QVector3D blue(0.0f, 0.0f, 1.0f);
+    QVector3D white(1.0f, 1.0f, 1.0f);
+
+    QVector<QVector3D> vertices = QVector<QVector3D>()
+            << v0 << n0 << red
+            << v1 << n1 << blue
+            << v2 << n2 << green
+            << v3 << n3 << white;
+
+    //     DrawElementIndirect
+    {
+        Qt3DCore::QEntity *customDrawElementIndirectEntity = new Qt3DCore::QEntity(rootEntity);
+
+        // Transform
+        Qt3DCore::QTransform *transform = new Qt3DCore::QTransform;
+        transform->setScale(8.0f);
+        transform->setTranslation(QVector3D(-10.0f, 0.0, 0.0f));
+
+        // Custom Mesh (TetraHedron)
+        Qt3DRender::QGeometryRenderer *customMeshRenderer = new Qt3DRender::QGeometryRenderer;
+        Qt3DRender::QGeometry *customGeometry = new Qt3DRender::QGeometry(customMeshRenderer);
+
+        Qt3DRender::QBuffer *vertexDataBuffer = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::VertexBuffer, customGeometry);
+        Qt3DRender::QBuffer *indexDataBuffer = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::IndexBuffer, customGeometry);
+        Qt3DRender::QBuffer *indirectDrawDataBuffer = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::DrawIndirectBuffer, customGeometry);
+
+        // 4 distinct vertices
+        QByteArray vertexBufferData;
+        vertexBufferData.resize(4 * (3 + 3 + 3) * sizeof(float));
+
+        float *rawVertexArray = reinterpret_cast<float *>(vertexBufferData.data());
+        int idx = 0;
+
+        Q_FOREACH (const QVector3D &v, vertices) {
+            rawVertexArray[idx++] = v.x();
+            rawVertexArray[idx++] = v.y();
+            rawVertexArray[idx++] = v.z();
+        }
+
+        // Indices (12)
+        QByteArray indexBufferData;
+        indexBufferData.resize(4 * 3 * sizeof(ushort));
+        ushort *rawIndexArray = reinterpret_cast<ushort *>(indexBufferData.data());
+
+        // Front
+        rawIndexArray[0] = 0;
+        rawIndexArray[1] = 1;
+        rawIndexArray[2] = 2;
+        // Bottom
+        rawIndexArray[3] = 3;
+        rawIndexArray[4] = 1;
+        rawIndexArray[5] = 0;
+        // Left
+        rawIndexArray[6] = 0;
+        rawIndexArray[7] = 2;
+        rawIndexArray[8] = 3;
+        // Right
+        rawIndexArray[9] = 1;
+        rawIndexArray[10] = 3;
+        rawIndexArray[11] = 2;
+
+
+        QByteArray indirectBufferData;
+        indirectBufferData.resize(sizeof(IndirectElementDrawBuffer));
+        IndirectElementDrawBuffer *indirectStruct = reinterpret_cast<IndirectElementDrawBuffer *>(indirectBufferData.data());
+        indirectStruct->count = 12U;
+        indirectStruct->firstIndex = 0U;
+        indirectStruct->baseInstance = 0U;
+        indirectStruct->baseVertex = 0U;
+        indirectStruct->instancesCount = 1U;
+
+        vertexDataBuffer->setData(vertexBufferData);
+        indexDataBuffer->setData(indexBufferData);
+        indirectDrawDataBuffer->setData(indirectBufferData);
+
+        // Attributes
+        Qt3DRender::QAttribute *positionAttribute = new Qt3DRender::QAttribute();
+        positionAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
+        positionAttribute->setBuffer(vertexDataBuffer);
+        positionAttribute->setVertexBaseType(Qt3DRender::QAttribute::Float);
+        positionAttribute->setVertexSize(3);
+        positionAttribute->setByteOffset(0);
+        positionAttribute->setByteStride(9 * sizeof(float));
+        positionAttribute->setCount(4);
+        positionAttribute->setName(Qt3DRender::QAttribute::defaultPositionAttributeName());
+
+        Qt3DRender::QAttribute *normalAttribute = new Qt3DRender::QAttribute();
+        normalAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
+        normalAttribute->setBuffer(vertexDataBuffer);
+        normalAttribute->setVertexBaseType(Qt3DRender::QAttribute::Float);
+        normalAttribute->setVertexSize(3);
+        normalAttribute->setByteOffset(3 * sizeof(float));
+        normalAttribute->setByteStride(9 * sizeof(float));
+        normalAttribute->setCount(4);
+        normalAttribute->setName(Qt3DRender::QAttribute::defaultNormalAttributeName());
+
+        Qt3DRender::QAttribute *colorAttribute = new Qt3DRender::QAttribute();
+        colorAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
+        colorAttribute->setBuffer(vertexDataBuffer);
+        colorAttribute->setVertexBaseType(Qt3DRender::QAttribute::Float);
+        colorAttribute->setVertexSize(3);
+        colorAttribute->setByteOffset(6 * sizeof(float));
+        colorAttribute->setByteStride(9 * sizeof(float));
+        colorAttribute->setCount(4);
+        colorAttribute->setName(Qt3DRender::QAttribute::defaultColorAttributeName());
+
+        Qt3DRender::QAttribute *indexAttribute = new Qt3DRender::QAttribute();
+        indexAttribute->setAttributeType(Qt3DRender::QAttribute::IndexAttribute);
+        indexAttribute->setBuffer(indexDataBuffer);
+        indexAttribute->setVertexBaseType(Qt3DRender::QAttribute::UnsignedShort);
+        indexAttribute->setVertexSize(1);
+        indexAttribute->setByteOffset(0);
+        indexAttribute->setByteStride(0);
+        indexAttribute->setCount(12);
+
+        Qt3DRender::QAttribute *indirectAttribute = new Qt3DRender::QAttribute();
+        indirectAttribute->setAttributeType(Qt3DRender::QAttribute::DrawIndirectAttribute);
+        indirectAttribute->setBuffer(indirectDrawDataBuffer);
+        indirectAttribute->setByteOffset(0);
+        indirectAttribute->setByteStride(0);
+        indirectAttribute->setCount(1);
+
+        customGeometry->addAttribute(positionAttribute);
+        customGeometry->addAttribute(normalAttribute);
+        customGeometry->addAttribute(colorAttribute);
+        customGeometry->addAttribute(indexAttribute);
+        customGeometry->addAttribute(indirectAttribute);
+
+        customMeshRenderer->setInstanceCount(1);
+        customMeshRenderer->setIndexOffset(0);
+        customMeshRenderer->setFirstInstance(0);
+        customMeshRenderer->setPrimitiveType(Qt3DRender::QGeometryRenderer::Triangles);
+        customMeshRenderer->setGeometry(customGeometry);
+        // 4 faces of 3 points
+        customMeshRenderer->setVertexCount(12);
+
+        customDrawElementIndirectEntity->addComponent(customMeshRenderer);
+        customDrawElementIndirectEntity->addComponent(transform);
+        customDrawElementIndirectEntity->addComponent(material);
+    }
+
+    // DrawArrayIndirect
+    {
+        Qt3DCore::QEntity *customDrawArrayIndirectEntity = new Qt3DCore::QEntity(rootEntity);
+
+        // Transform
+        Qt3DCore::QTransform *transform = new Qt3DCore::QTransform;
+        transform->setScale(8.0f);
+        transform->setTranslation(QVector3D(10.0f, 0.0, 0.0f));
+
+        // Custom Mesh (TetraHedron)
+        Qt3DRender::QGeometryRenderer *customMeshRenderer = new Qt3DRender::QGeometryRenderer;
+        Qt3DRender::QGeometry *customGeometry = new Qt3DRender::QGeometry(customMeshRenderer);
+
+        Qt3DRender::QBuffer *vertexDataBuffer = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::VertexBuffer, customGeometry);
+        Qt3DRender::QBuffer *indirectDrawDataBuffer = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::DrawIndirectBuffer, customGeometry);
+
+
+        QVector<QVector3D> orderedPositionVertices;
+        // 12 vertices with position, normal, color
+        orderedPositionVertices.reserve(12 * (1 + 1 + 1));
+
+        orderedPositionVertices << v0 << n0 << red;
+        orderedPositionVertices << v1 << n1 << red;
+        orderedPositionVertices << v2 << n2 << red;
+
+        orderedPositionVertices << v3 << n3 << green;
+        orderedPositionVertices << v1 << n1 << green;
+        orderedPositionVertices << v0 << n0 << green;
+
+        orderedPositionVertices << v0 << n0 << blue;
+        orderedPositionVertices << v2 << n2 << blue;
+        orderedPositionVertices << v3 << n3 << blue;
+
+        orderedPositionVertices << v1 << n1 << white;
+        orderedPositionVertices << v3 << n3 << white;
+        orderedPositionVertices << v2 << n2 << white;
+
+        QByteArray vertexBufferData;
+        vertexBufferData.resize(orderedPositionVertices.size() * sizeof(QVector3D));
+        memcpy(vertexBufferData.data(), orderedPositionVertices.data(), orderedPositionVertices.size() * sizeof(QVector3D));
+
+        QByteArray indirectBufferData;
+        indirectBufferData.resize(sizeof(IndirectArrayDrawBuffer));
+        IndirectArrayDrawBuffer *indirectStruct = reinterpret_cast<IndirectArrayDrawBuffer *>(indirectBufferData.data());
+        indirectStruct->count = 12U;
+        indirectStruct->baseInstance = 0U;
+        indirectStruct->instancesCount = 1U;
+        indirectStruct->first = 0U;
+
+        vertexDataBuffer->setData(vertexBufferData);
+        indirectDrawDataBuffer->setData(indirectBufferData);
+
+        // Attributes
+        Qt3DRender::QAttribute *positionAttribute = new Qt3DRender::QAttribute();
+        positionAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
+        positionAttribute->setBuffer(vertexDataBuffer);
+        positionAttribute->setVertexBaseType(Qt3DRender::QAttribute::Float);
+        positionAttribute->setVertexSize(3);
+        positionAttribute->setByteOffset(0);
+        positionAttribute->setByteStride(9 * sizeof(float));
+        positionAttribute->setCount(12);
+        positionAttribute->setName(Qt3DRender::QAttribute::defaultPositionAttributeName());
+
+        Qt3DRender::QAttribute *normalAttribute = new Qt3DRender::QAttribute();
+        normalAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
+        normalAttribute->setBuffer(vertexDataBuffer);
+        normalAttribute->setVertexBaseType(Qt3DRender::QAttribute::Float);
+        normalAttribute->setVertexSize(3);
+        normalAttribute->setByteOffset(3 * sizeof(float));
+        normalAttribute->setByteStride(9 * sizeof(float));
+        normalAttribute->setCount(12);
+        normalAttribute->setName(Qt3DRender::QAttribute::defaultNormalAttributeName());
+
+        Qt3DRender::QAttribute *colorAttribute = new Qt3DRender::QAttribute();
+        colorAttribute->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
+        colorAttribute->setBuffer(vertexDataBuffer);
+        colorAttribute->setVertexBaseType(Qt3DRender::QAttribute::Float);
+        colorAttribute->setVertexSize(3);
+        colorAttribute->setByteOffset(6 * sizeof(float));
+        colorAttribute->setByteStride(9 * sizeof(float));
+        colorAttribute->setCount(12);
+        colorAttribute->setName(Qt3DRender::QAttribute::defaultColorAttributeName());
+
+        Qt3DRender::QAttribute *indirectAttribute = new Qt3DRender::QAttribute();
+        indirectAttribute->setAttributeType(Qt3DRender::QAttribute::DrawIndirectAttribute);
+        indirectAttribute->setBuffer(indirectDrawDataBuffer);
+        indirectAttribute->setByteOffset(0);
+        indirectAttribute->setByteStride(0);
+        indirectAttribute->setCount(1);
+
+        customGeometry->addAttribute(positionAttribute);
+        customGeometry->addAttribute(normalAttribute);
+        customGeometry->addAttribute(colorAttribute);
+        customGeometry->addAttribute(indirectAttribute);
+
+        customMeshRenderer->setInstanceCount(1);
+        customMeshRenderer->setIndexOffset(0);
+        customMeshRenderer->setFirstInstance(0);
+        customMeshRenderer->setPrimitiveType(Qt3DRender::QGeometryRenderer::Triangles);
+        customMeshRenderer->setGeometry(customGeometry);
+        // 4 faces of 3 points
+        customMeshRenderer->setVertexCount(12);
+
+        customDrawArrayIndirectEntity->addComponent(customMeshRenderer);
+        customDrawArrayIndirectEntity->addComponent(transform);
+        customDrawArrayIndirectEntity->addComponent(material);
+    }
+
+    view.setRootEntity(rootEntity);
+    view.show();
+
+    return app.exec();
+}