1/****************************************************************************
2**
3** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt3D module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#include "pointsvisitor_p.h"
41#include <Qt3DCore/qentity.h>
42#include <Qt3DRender/qgeometryrenderer.h>
43#include <Qt3DRender/private/managers_p.h>
44#include <Qt3DRender/private/nodemanagers_p.h>
45#include <Qt3DRender/private/buffermanager_p.h>
46#include <Qt3DRender/private/geometryrenderer_p.h>
47#include <Qt3DRender/private/geometryrenderermanager_p.h>
48#include <Qt3DRender/private/geometry_p.h>
49#include <Qt3DRender/private/attribute_p.h>
50#include <Qt3DRender/private/buffer_p.h>
51#include <Qt3DRender/private/trianglesvisitor_p.h>
52#include <Qt3DRender/private/visitorutils_p.h>
53
54QT_BEGIN_NAMESPACE
55
56namespace Qt3DRender {
57
58namespace Render {
59
60namespace {
61
62// indices, vertices are already offset
63template<typename Index, typename Vertex>
64void traverseCoordinatesIndexed(Index *indices,
65 Vertex *vertices,
66 const BufferInfo &indexInfo,
67 const BufferInfo &vertexInfo,
68 PointsVisitor *visitor)
69{
70 uint i = 0;
71 const uint verticesStride = vertexInfo.byteStride / sizeof(Vertex);
72 const uint maxVerticesDataSize = qMin(a: vertexInfo.dataSize, b: 3U);
73
74 uint ndx;
75 Vector3D abc;
76 while (i < indexInfo.count) {
77 ndx = indices[i];
78 const uint idx = ndx * verticesStride;
79 for (uint j = 0; j < maxVerticesDataSize; ++j) {
80 abc[j] = vertices[idx + j];
81 }
82 visitor->visit(ndx, c: abc);
83 ++i;
84 }
85}
86
87// vertices are already offset
88template<typename Vertex>
89void traverseCoordinates(Vertex *vertices,
90 const BufferInfo &vertexInfo,
91 PointsVisitor *visitor)
92{
93 const uint verticesStride = vertexInfo.byteStride / sizeof(Vertex);
94 const uint maxVerticesDataSize = qMin(a: vertexInfo.dataSize, b: 3U);
95
96 uint ndx = 0;
97 Vector3D abc;
98 while (ndx < vertexInfo.count) {
99 const uint idx = ndx * verticesStride;
100 for (uint j = 0; j < maxVerticesDataSize; ++j)
101 abc[j] = vertices[idx + j];
102 visitor->visit(ndx, c: abc);
103 ++ndx;
104 }
105}
106
107template<typename Index, typename Visitor>
108struct IndexedVertexExecutor
109{
110 template<typename Vertex>
111 void operator ()(const BufferInfo &vertexInfo, Vertex * vertices)
112 {
113 traverseCoordinatesIndexed(m_indices, vertices, m_indexBufferInfo, vertexInfo, m_visitor);
114 }
115
116 BufferInfo m_indexBufferInfo;
117 Index *m_indices;
118 Qt3DRender::QGeometryRenderer::PrimitiveType m_primitiveType;
119 Visitor* m_visitor;
120};
121
122template<typename Visitor>
123struct IndexExecutor
124{
125 template<typename Index>
126 void operator ()( const BufferInfo &indexInfo, Index *indices)
127 {
128 IndexedVertexExecutor<Index, Visitor> exec;
129 exec.m_primitiveType = m_primitiveType;
130 exec.m_indices = indices;
131 exec.m_indexBufferInfo = indexInfo;
132 exec.m_visitor = m_visitor;
133 Qt3DRender::Render::Visitor::processBuffer(m_vertexBufferInfo, exec);
134 }
135
136 BufferInfo m_vertexBufferInfo;
137 Qt3DRender::QGeometryRenderer::PrimitiveType m_primitiveType;
138 Visitor* m_visitor;
139};
140
141template<typename Visitor>
142struct VertexExecutor
143{
144 template<typename Vertex>
145 void operator ()(const BufferInfo &vertexInfo, Vertex *vertices)
146 {
147 switch (m_primitiveType) {
148 case Qt3DRender::QGeometryRenderer::Points:
149 traverseCoordinates(vertices, vertexInfo, m_visitor);
150 return;
151 default:
152 Q_UNREACHABLE();
153 return;
154 }
155 }
156
157 Qt3DRender::QGeometryRenderer::PrimitiveType m_primitiveType;
158 Visitor* m_visitor;
159};
160
161} // anonymous
162
163
164PointsVisitor::~PointsVisitor()
165{
166
167}
168
169void PointsVisitor::apply(const Qt3DCore::QEntity *entity)
170{
171 GeometryRenderer *renderer = m_manager->geometryRendererManager()->lookupResource(id: entity->id());
172 apply(renderer, id: entity->id());
173}
174
175void PointsVisitor::apply(const GeometryRenderer *renderer, const Qt3DCore::QNodeId id)
176{
177 m_nodeId = id;
178 if (renderer && renderer->instanceCount() == 1) {
179 Visitor::visitPrimitives<VertexExecutor<PointsVisitor>,
180 IndexExecutor<PointsVisitor>, PointsVisitor>(manager: m_manager, renderer, visitor: this);
181 }
182}
183
184} // namespace Render
185
186} // namespace Qt3DRender
187
188QT_END_NAMESPACE
189

source code of qt3d/src/render/backend/pointsvisitor.cpp