Class QAccelPlot::LineCurvePointRenderer¶

ClassList > QAccelPlot > LineCurvePointRenderer

Internal renderer responsible for building and updating QSGNode marker geometry for a LineCurve .More...

#include <LineCurvePointRenderer.hpp>

Public Static Attributes¶

Type	Name
constexpr std::size_t	kVertexCacheBytesPerPoint = `{[kVerticesPerPoint](classQAccelPlot_1_1LineCurvePointRenderer.md#variable-kverticesperpoint) \* sizeof([PointVertex](structQAccelPlot_1_1PointVertex.md))}` Vertex cache bytes per marker.
constexpr int	kVerticesPerPoint = `{6}` Number of vertices drawn per marker.

Public Functions¶

Type	Name
bool	contains (const QPointF & point, const CurveHitTestParams & params) const Returns `true` if__point lies within__params.hitThreshold pixels of any marker.
QSGNode *	paint (QSGNode * oldNode, const PointCurveRenderParams & params) const Updates the scene graph node tree for the point markers.

Public Static Functions¶

Type	Name
void	writeVertexCache (std::vector< char > & cache, int firstPoint, int pointCount) Writes the vertices of markers [ firstPoint _,_pointCount ) into__cache , which holds`kVertexCacheBytesPerPoint` bytes per marker.

Detailed Description¶

Renders per-point markers as two triangles per point. The vertex buffer depends only on the point count, so data updates of the same size only upload the data texture.

Public Static Attributes Documentation¶

variable kVertexCacheBytesPerPoint¶

Vertex cache bytes per marker.

constexpr std::size_t QAccelPlot::LineCurvePointRenderer::kVertexCacheBytesPerPoint;

variable kVerticesPerPoint¶

Number of vertices drawn per marker.

constexpr int QAccelPlot::LineCurvePointRenderer::kVerticesPerPoint;

Public Functions Documentation¶

function contains¶

Returns true if__point lies within__params.hitThreshold pixels of any marker.

bool QAccelPlot::LineCurvePointRenderer::contains (
    const QPointF & point,
    const CurveHitTestParams & params
) const

function paint¶

Updates the scene graph node tree for the point markers.

QSGNode * QAccelPlot::LineCurvePointRenderer::paint (
    QSGNode * oldNode,
    const PointCurveRenderParams & params
) const

The vertex buffer is written only when the point count changes, from params.vertexCache when it matches.

Public Static Functions Documentation¶

function writeVertexCache¶

Writes the vertices of markers [ firstPoint _,_pointCount ) into__cache , which holdskVertexCacheBytesPerPoint bytes per marker.

static void QAccelPlot::LineCurvePointRenderer::writeVertexCache (
    std::vector< char > & cache,
    int firstPoint,
    int pointCount
)

Marker vertices hold no data, so the vertices before firstPoint stay valid.

The documentation for this class was generated from the following file QAccelPlot/src/QAccelPlot/renderers/LineCurvePointRenderer.hpp