GLWidget Class Reference

The GLWidget class This is the main class containing the OpenGL context All interaction with OpenGL happens here. More...

#include <glwidget.h>

Inheritance diagram for GLWidget:

Collaboration diagram for GLWidget:

Public Types
enum	RenderMode { NONE, LINES, POINTS }
	RenderMode enum currently only LINES is supported.

Public Slots
void	cleanup ()

Signals
void	usedGPUMemoryChanged (float size)
void	totalGPUMemoryChanged (float size)
void	fpsChanged (int fps)
void	graphicsDeviceInfoChanged (QString string)

Public Member Functions
	GLWidget (QWidget *parent, MainWindow *mainWindow)
void	initLineRenderMode (std::vector< std::vector< LineVertex > > *lines)
	set up OpenGL buffers and shaders to render lines More...
QImage	getImage ()
	getImage More...
void	updateClipPlaneNormal ()
	updateClipPlaneNormal set the clip plane normal to the current right camera vector this is much easier for the user than setting the clip plane explicitly

Public Attributes
float	lineTriangleStripWidth
	total width of triangle strip (black line + white halo)
float	lineWidthPercentageBlack
	percentage of triangle strip drawn black to represent line (rest is white halo)
float	lineWidthDepthCueingFactor
	how much the black line is drawn thinner with increasing depth
float	lineHaloMaxDepth
	max depth displacement of halo
bool	enableClipping
	if enabled, clip beyond a specified clipping plane. note: no real clipping we only discard fragments
glm::vec3	clipPlaneNormal
	direction along which to clip. note: no real clipping we only discard fragments
float	clipPlaneDistance
	distance from origin in direction of clipPlaneNormal beyond which to clip
enum GLWidget::RenderMode	renderMode

Protected Slots
void	paintGL () Q_DECL_OVERRIDE
void	initializeGL () Q_DECL_OVERRIDE
void	resizeGL (int w, int h) Q_DECL_OVERRIDE

Protected Member Functions
void	mousePressEvent (QMouseEvent *event) Q_DECL_OVERRIDE
void	mouseMoveEvent (QMouseEvent *event) Q_DECL_OVERRIDE
void	keyPressEvent (QKeyEvent *event) Q_DECL_OVERRIDE
void	keyReleaseEvent (QKeyEvent *event) Q_DECL_OVERRIDE
void	wheelEvent (QWheelEvent *event) Q_DECL_OVERRIDE

Private Member Functions
void	initShaders ()
void	allocateGPUBufferLineData ()
void	drawLines ()
void	calculateFPS ()
void	printDebugMsg (const QOpenGLDebugMessage &msg)

Private Attributes
Camera	camera
std::vector< std::vector< LineVertex > > *	lines
size_t	nrLines
QOpenGLShaderProgram *	shaderLinesWithHalos
QOpenGLVertexArrayObject	vaoLines
QOpenGLBuffer	vboLines
QPoint	lastMousePos
size_t	frameCount = 0
size_t	fps = 0
qint64	previousTimeFPS
QElapsedTimer	fpsTimer
bool	GL_NVX_gpu_memory_info_supported = false
GLint	total_mem_kb = 0
GLint	cur_avail_mem_kb = 0
QTimer	paintTimer
QOpenGLDebugLogger *	logger
MainWindow *	mainWindow

Friends
class	MainWindow
	make friend since tightly coupled anyway

Detailed Description

The GLWidget class This is the main class containing the OpenGL context All interaction with OpenGL happens here.

Member Function Documentation

getImage()

QImage GLWidget::getImage ( )

inline

getImage

Returns

an image snapshot of the current OpenGL framebuffer

initLineRenderMode()

void GLWidget::initLineRenderMode

(

std::vector< std::vector< LineVertex > > *

lines

)

set up OpenGL buffers and shaders to render lines

Parameters

lines

vector of lines (vector of vector of line vertices) each vertex has 8 floats: 3 pos, 3 direction to next, 2 uv for triangle strip texturing we store all three attributes interleaved on single vbo [<posdirectionuv><posdirectionuv>...] NOTE: we store two sequential copies of each vertex (one with v = 0, one with v = 1) to draw lines as triangle strips

Member Data Documentation

lines

std::vector<std::vector<LineVertex> >* GLWidget::lines

private

CPU line vertex data each line vertex has 8 floats: 3 pos, 3 direction to next, 2 uv for triangle strip texturing NOTE: we store two sequential copies of each vertex (one with v = 0, one with v = 1) to draw lines as triangle strips

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The documentation for this class was generated from the following files:

• src/glwidget.h
• src/glwidget.cpp