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// Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "pointsvisitor_p.h"
#include <Qt3DCore/qentity.h>
#include <Qt3DRender/qgeometryrenderer.h>
#include <Qt3DRender/private/managers_p.h>
#include <Qt3DRender/private/nodemanagers_p.h>
#include <Qt3DRender/private/buffermanager_p.h>
#include <Qt3DRender/private/geometryrenderer_p.h>
#include <Qt3DRender/private/geometryrenderermanager_p.h>
#include <Qt3DRender/private/geometry_p.h>
#include <Qt3DRender/private/attribute_p.h>
#include <Qt3DRender/private/buffer_p.h>
#include <Qt3DRender/private/trianglesvisitor_p.h>
#include <Qt3DRender/private/visitorutils_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
namespace {
// indices, vertices are already offset
template<typename Index, typename Vertex>
void traverseCoordinatesIndexed(Index *indices,
Vertex *vertices,
const BufferInfo &indexInfo,
const BufferInfo &vertexInfo,
PointsVisitor *visitor)
{
uint i = 0;
const uint verticesStride = vertexInfo.byteStride / sizeof(Vertex);
const uint maxVerticesDataSize = qMin(vertexInfo.dataSize, 3U);
uint ndx;
Vector3D abc;
while (i < indexInfo.count) {
ndx = indices[i];
const uint idx = ndx * verticesStride;
for (uint j = 0; j < maxVerticesDataSize; ++j) {
abc[j] = vertices[idx + j];
}
visitor->visit(ndx, abc);
++i;
}
}
// vertices are already offset
template<typename Vertex>
void traverseCoordinates(Vertex *vertices,
const BufferInfo &vertexInfo,
PointsVisitor *visitor)
{
const uint verticesStride = vertexInfo.byteStride / sizeof(Vertex);
const uint maxVerticesDataSize = qMin(vertexInfo.dataSize, 3U);
uint ndx = 0;
Vector3D abc;
while (ndx < vertexInfo.count) {
const uint idx = ndx * verticesStride;
for (uint j = 0; j < maxVerticesDataSize; ++j)
abc[j] = vertices[idx + j];
visitor->visit(ndx, abc);
++ndx;
}
}
template<typename Index, typename Visitor>
struct IndexedVertexExecutor
{
template<typename Vertex>
void operator ()(const BufferInfo &vertexInfo, Vertex * vertices)
{
traverseCoordinatesIndexed(m_indices, vertices, m_indexBufferInfo, vertexInfo, m_visitor);
}
BufferInfo m_indexBufferInfo;
Index *m_indices;
Qt3DRender::QGeometryRenderer::PrimitiveType m_primitiveType;
Visitor* m_visitor;
};
template<typename Visitor>
struct IndexExecutor
{
template<typename Index>
void operator ()( const BufferInfo &indexInfo, Index *indices)
{
IndexedVertexExecutor<Index, Visitor> exec;
exec.m_primitiveType = m_primitiveType;
exec.m_indices = indices;
exec.m_indexBufferInfo = indexInfo;
exec.m_visitor = m_visitor;
Qt3DRender::Render::Visitor::processBuffer(m_vertexBufferInfo, exec);
}
BufferInfo m_vertexBufferInfo;
Qt3DRender::QGeometryRenderer::PrimitiveType m_primitiveType;
Visitor* m_visitor;
};
template<typename Visitor>
struct VertexExecutor
{
template<typename Vertex>
void operator ()(const BufferInfo &vertexInfo, Vertex *vertices)
{
switch (m_primitiveType) {
case Qt3DRender::QGeometryRenderer::Points:
traverseCoordinates(vertices, vertexInfo, m_visitor);
return;
default:
Q_UNREACHABLE_RETURN();
}
}
Qt3DRender::QGeometryRenderer::PrimitiveType m_primitiveType;
Visitor* m_visitor;
};
} // anonymous
PointsVisitor::~PointsVisitor()
{
}
void PointsVisitor::apply(const Qt3DCore::QEntity *entity)
{
GeometryRenderer *renderer = m_manager->geometryRendererManager()->lookupResource(entity->id());
apply(renderer, entity->id());
}
void PointsVisitor::apply(const GeometryRenderer *renderer, const Qt3DCore::QNodeId id)
{
m_nodeId = id;
if (renderer && renderer->instanceCount() == 1) {
Visitor::visitPrimitives<GeometryRenderer, VertexExecutor<PointsVisitor>,
IndexExecutor<PointsVisitor>, PointsVisitor>(m_manager, renderer, this);
}
}
void PointsVisitor::apply(const PickingProxy *proxy, const Qt3DCore::QNodeId id)
{
m_nodeId = id;
if (proxy && proxy->instanceCount() == 1) {
Visitor::visitPrimitives<PickingProxy, VertexExecutor<PointsVisitor>,
IndexExecutor<PointsVisitor>, PointsVisitor>(m_manager, proxy, this);
}
}
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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