Class QAccelPlot::BarMaterial¶

ClassList > QAccelPlot > BarMaterial

QSGMaterial for bar series rendering, extending RectMaterial with the bar geometry and colormap uniforms.More...

#include <BarMaterial.hpp>

Inherits the following classes: QAccelPlot::RectMaterial

Inheritance diagram¶

flowchart TB
  classQAccelPlot_1_1BarMaterial["QAccelPlot::BarMaterial"]

  classQAccelPlot_1_1RectMaterial["QAccelPlot::RectMaterial"]
  classQAccelPlot_1_1RectMaterial --> classQAccelPlot_1_1BarMaterial
  click classQAccelPlot_1_1RectMaterial "../classQAccelPlot_1_1RectMaterial/" "Open QAccelPlot::RectMaterial"

  classQAccelPlot_1_1DataTextureMaterial["QAccelPlot::DataTextureMaterial"]
  classQAccelPlot_1_1DataTextureMaterial --> classQAccelPlot_1_1RectMaterial
  click classQAccelPlot_1_1DataTextureMaterial "../classQAccelPlot_1_1DataTextureMaterial/" "Open QAccelPlot::DataTextureMaterial"

  external_base_classQAccelPlot_1_1DataTextureMaterial_1["QSGMaterial"]
  external_base_classQAccelPlot_1_1DataTextureMaterial_1 --> classQAccelPlot_1_1DataTextureMaterial

Public Attributes¶

Type	Name
float	barOffset = `{0.0f}` Shift of every bar along the position axis in data units.
float	barWidth = `{0.8f}` Bar width in position-axis data units.
float	baseline = `{0.0f}` Value the bars start from, relative to the value-axis render origin.
GradientTexture	colorMap Colormap lookup texture sampled at binding 2.
float	colorSource = `{0.0f}` What `colorMap` maps: 0 nothing (the rectangle colors apply), 1 the value, 2 the position.
float	horizontal = `{0.0f}` 1.0 when positions lie on the Y axis (float for std140 UBO compatibility).
float	ranged = `{0.0f}` 1.0 when each bar holds its own extent along the position axis.
float	valueLogScale = `{0.0f}` 1.0 to place values on the colormap in log10.
float	valueMax = `{1.0f}` Value at colormap position 1, shifted like `valueMin` .
float	valueMin = `{0.0f}` Value at colormap position 0, shifted like the data unless `valueLogScale` is set.
float	valueOrigin = `{0.0f}` Added to the mapped data before a log normalization, which needs the absolute value.

Public Attributes inherited from QAccelPlot::RectMaterial¶

See QAccelPlot::RectMaterial

Type	Name
float	antialiasing = `{0.0f}` 1.0 to smooth the rectangle and outline edges.
QColor	borderColor = `{Qt::black}` Outline color.
float	borderWidth = `{0.0f}` Outline width in pixels, drawn inside each rectangle.
QColor	hoverColor = `{Qt::transparent}` Fill color of the highlighted rectangle.
float	hoveredIndex = `{-1.0f}` Index of the highlighted rectangle, or -1 for none.
QVector2D	minimumSize = `{0.0f, 0.0f}` Minimum drawn rectangle width and height in pixels.
float	rectCount = `{0.0f}` Number of rectangles in the data texture (used to index the sampler).

Public Attributes inherited from QAccelPlot::DataTextureMaterial¶

See QAccelPlot::DataTextureMaterial

Type	Name
QColor	color = `{Qt::blue}` Line/fill color uniform.
std::shared_ptr< DataTexture >	dataTexture Data texture sampled by the shader. Materials drawing the same samples may share one.
QVector2D	domainMax = `{1.0f, 1.0f}` Maximum data-space coordinate.
QVector2D	domainMin = `{0.0f, 0.0f}` Minimum data-space coordinate.
float	logScaleX = `{0.0f}` 1.0 when the X axis uses log scale (float for std140 UBO compatibility).
float	logScaleY = `{0.0f}` 1.0 when the Y axis uses log scale (float for std140 UBO compatibility).
float	useVertexColor = `{0.0f}` 1.0 when per-vertex color overrides `color` (float for std140 UBO compatibility).
QVector2D	viewportSize = `{800.0f, 600.0f}` Viewport size in pixels.

Public Functions¶

Type	Name
	BarMaterial () Constructs a BarMaterial with default uniform values.
QSGMaterialShader *	createShader (QSGRendererInterface::RenderMode) override const Creates and returns the bar shader program.
QSGMaterialType *	type () override const Returns the unique material type identifier for this class.

Public Functions inherited from QAccelPlot::RectMaterial¶

See QAccelPlot::RectMaterial

Type	Name
	RectMaterial () Constructs a RectMaterial with default uniform values.
QSGMaterialShader *	createShader (QSGRendererInterface::RenderMode) override const Creates and returns the rectangle shader program.
QSGMaterialType *	type () override const Returns the unique material type identifier for this class.

Public Functions inherited from QAccelPlot::DataTextureMaterial¶

See QAccelPlot::DataTextureMaterial

Type	Name
	DataTextureMaterial () Constructs an empty DataTextureMaterial .
int	compare (const QSGMaterial * other) override const Compares shared uniform fields; delegates type-specific fields to `compareExtra()` .
QSGTexture *	sampledTexture () const Returns the texture the shader samples, or `nullptr` before`dataTexture` holds an upload.
void	uploadTexture (QQuickWindow * window, const float * data, int floatCount) Uploads floatCount raw floats from__data into`dataTexture` , creating it when it is`nullptr` .
	~DataTextureMaterial () override

Public Static Functions inherited from QAccelPlot::DataTextureMaterial¶

See QAccelPlot::DataTextureMaterial

Type	Name
const QSGGeometry::AttributeSet &	attributeSet () Returns the shared vertex attribute set: `{float` id, float param, uchar4 color} (12 bytes).
void	commitTexture (QSGMaterialShader::RenderState & state, int binding, QSGTexture texture, const DataTexture** * data) Commits the texture of data to sampler__binding (call from`updateSampledImage` ). Does nothing before an upload.
const QSGGeometry::AttributeSet &	vertexIndexAttributeSet () Returns the attribute set of marker quads: one ignored `uchar4` placeholder (4 bytes).
bool	writeCommonUniforms (char * buf, int bufSize, const QMatrix4x4 & matrix, const DataTextureMaterial * mat) Writes the shared UBO prefix (transform + color + domain + flags) into buf .

Protected Functions¶

Type	Name
virtual int	compareExtra (const QSGMaterial * other) override const Compares the bar-specific uniforms and the colormap texture after the rectangle uniforms compare equal.

Protected Functions inherited from QAccelPlot::RectMaterial¶

See QAccelPlot::RectMaterial

Type	Name
virtual int	compareExtra (const QSGMaterial * other) override const Compares the rectangle-specific uniforms after the base-class comparison succeeds.

Protected Functions inherited from QAccelPlot::DataTextureMaterial¶

See QAccelPlot::DataTextureMaterial

Type	Name
virtual int	compareExtra (const QSGMaterial * other) const Subclass hook for `compare()` — called after the shared fields compare equal.

Detailed Description¶

The data texture holds (position, value) pairs, or (from, to, value) triples when ranged is set; the shader turns each into a rectangle. When colorSource is set, the vertex shader colors each bar from colorMap.

Public Attributes Documentation¶

variable barOffset¶

Shift of every bar along the position axis in data units.

float QAccelPlot::BarMaterial::barOffset;

variable barWidth¶

Bar width in position-axis data units.

float QAccelPlot::BarMaterial::barWidth;

variable baseline¶

Value the bars start from, relative to the value-axis render origin.

float QAccelPlot::BarMaterial::baseline;

variable colorMap¶

Colormap lookup texture sampled at binding 2.

GradientTexture QAccelPlot::BarMaterial::colorMap;

variable colorSource¶

What colorMap maps: 0 nothing (the rectangle colors apply), 1 the value, 2 the position.

float QAccelPlot::BarMaterial::colorSource;

variable horizontal¶

1.0 when positions lie on the Y axis (float for std140 UBO compatibility).

float QAccelPlot::BarMaterial::horizontal;

variable ranged¶

1.0 when each bar holds its own extent along the position axis.

float QAccelPlot::BarMaterial::ranged;

variable valueLogScale¶

1.0 to place values on the colormap in log10.

float QAccelPlot::BarMaterial::valueLogScale;

variable valueMax¶

Value at colormap position 1, shifted like valueMin .

float QAccelPlot::BarMaterial::valueMax;

variable valueMin¶

Value at colormap position 0, shifted like the data unless valueLogScale is set.

float QAccelPlot::BarMaterial::valueMin;

variable valueOrigin¶

Added to the mapped data before a log normalization, which needs the absolute value.

float QAccelPlot::BarMaterial::valueOrigin;

Public Functions Documentation¶

function BarMaterial¶

Constructs a BarMaterial with default uniform values.

QAccelPlot::BarMaterial::BarMaterial ()

function createShader¶

Creates and returns the bar shader program.

QSGMaterialShader * QAccelPlot::BarMaterial::createShader (
    QSGRendererInterface::RenderMode
) override const

function type¶

Returns the unique material type identifier for this class.

QSGMaterialType * QAccelPlot::BarMaterial::type () override const

Protected Functions Documentation¶

function compareExtra¶

Compares the bar-specific uniforms and the colormap texture after the rectangle uniforms compare equal.

virtual int QAccelPlot::BarMaterial::compareExtra (
    const QSGMaterial * other
) override const

Implements QAccelPlot::DataTextureMaterial::compareExtra

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