Class QAccelPlot::LineMaterial¶

ClassList > QAccelPlot > LineMaterial

QSGMaterial for line rendering, extending DataTextureMaterial with line-specific uniforms.More...

#include <LineMaterial.hpp>

Inherits the following classes: QAccelPlot::DataTextureMaterial

Inherited by the following classes: QAccelPlot::BandEdgeMaterial, QAccelPlot::GradientLineMaterial

Inheritance diagram¶

flowchart TB
  classQAccelPlot_1_1LineMaterial["QAccelPlot::LineMaterial"]

  classQAccelPlot_1_1DataTextureMaterial["QAccelPlot::DataTextureMaterial"]
  classQAccelPlot_1_1DataTextureMaterial --> classQAccelPlot_1_1LineMaterial
  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

  classQAccelPlot_1_1BandEdgeMaterial["QAccelPlot::BandEdgeMaterial"]
  classQAccelPlot_1_1LineMaterial --> classQAccelPlot_1_1BandEdgeMaterial
  click classQAccelPlot_1_1BandEdgeMaterial "../classQAccelPlot_1_1BandEdgeMaterial/" "Open QAccelPlot::BandEdgeMaterial"

  classQAccelPlot_1_1GradientLineMaterial["QAccelPlot::GradientLineMaterial"]
  classQAccelPlot_1_1LineMaterial --> classQAccelPlot_1_1GradientLineMaterial
  click classQAccelPlot_1_1GradientLineMaterial "../classQAccelPlot_1_1GradientLineMaterial/" "Open QAccelPlot::GradientLineMaterial"

Public Attributes¶

Type	Name
float	antialiasingEnabled = `{1.0f}` 1.0 when GPU anti-aliasing is active.
float	antialiasingFeather = `{1.0f}` Anti-aliasing feather width in pixels.
float	dashOffset = `{0.0f}` Phase offset into the dash pattern.
float	dashPattern = `{}` Alternating dash/gap lengths (up to 8 entries).
int	dashPatternSize = `{0}` Number of valid entries in `dashPattern` .
float	dashPeriod = `{0.0f}` Total dash+gap cycle length in pixels.
float	lineWidth = `{1.0f}` Rendered line width in pixels.
float	pointCount = `{0.0f}` Number of data points (used to index the data texture).
float	stepMode = `{0.0f}` `StepMode` of the line, as a float (std140 offset 180 in the UBO).

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
	LineMaterial () Constructs a LineMaterial with default uniform values.
QSGMaterialShader *	createShader (QSGRendererInterface::RenderMode) override const Creates and returns the line shader program.
QSGMaterialType *	type () override const Returns the unique material type identifier for this subclass.

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 line-specific uniform fields 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.

Protected Static Functions¶

Type	Name
QSGMaterialShader *	createLineShader (const QString & vertexShaderFileName) Returns the line shader program with vertex stage vertexShaderFileName and the line fragment stage.

Detailed Description¶

Supplies line width, point count, anti-aliasing parameters, and dash pattern data to the line shaders (std140 offsets 104–183 in the UBO; 176–179 holds the inherited item opacity).

Public Attributes Documentation¶

variable antialiasingEnabled¶

1.0 when GPU anti-aliasing is active.

float QAccelPlot::LineMaterial::antialiasingEnabled;

variable antialiasingFeather¶

Anti-aliasing feather width in pixels.

float QAccelPlot::LineMaterial::antialiasingFeather;

variable dashOffset¶

Phase offset into the dash pattern.

float QAccelPlot::LineMaterial::dashOffset;

variable dashPattern¶

Alternating dash/gap lengths (up to 8 entries).

float QAccelPlot::LineMaterial::dashPattern[8];

variable dashPatternSize¶

Number of valid entries in dashPattern .

int QAccelPlot::LineMaterial::dashPatternSize;

variable dashPeriod¶

Total dash+gap cycle length in pixels.

float QAccelPlot::LineMaterial::dashPeriod;

variable lineWidth¶

Rendered line width in pixels.

float QAccelPlot::LineMaterial::lineWidth;

variable pointCount¶

Number of data points (used to index the data texture).

float QAccelPlot::LineMaterial::pointCount;

variable stepMode¶

StepMode of the line, as a float (std140 offset 180 in the UBO).

float QAccelPlot::LineMaterial::stepMode;

Public Functions Documentation¶

function LineMaterial¶

Constructs a LineMaterial with default uniform values.

QAccelPlot::LineMaterial::LineMaterial ()

function createShader¶

Creates and returns the line shader program.

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

function type¶

Returns the unique material type identifier for this subclass.

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

Protected Functions Documentation¶

function compareExtra¶

Compares line-specific uniform fields after the base-class comparison succeeds.

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

Implements QAccelPlot::DataTextureMaterial::compareExtra

Protected Static Functions Documentation¶

function createLineShader¶

Returns the line shader program with vertex stage vertexShaderFileName and the line fragment stage.

static QSGMaterialShader * QAccelPlot::LineMaterial::createLineShader (
    const QString & vertexShaderFileName
)

The vertex stage must declare the same uniform block as line.vert.

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