scm_label Class Reference

An scm_label renders annotations on the sphere. More...

#include <scm-label.hpp>

Public Member Functions
	scm_label (const std::string &, int)
	Create a new label. More...
	~scm_label ()
	Finalize all OpenGL state.
void	draw (GLubyte r, GLubyte g, GLubyte b, GLubyte a)
	Draw all annotations using the given color and transparency. More...

Detailed Description

An scm_label renders annotations on the sphere.

The label renderer reads data from a CSV file giving a list of surface features, each with the following elements:

Key	Type
Name	a string
Latitude	in degrees
Longitude	in degrees
Diameter	in meters
Radius	distance from the center of the globe, in meters
Feature	a two-letter code

The name string is rendered in text scaled to fit the given diameter. The currently-defined two-letter codes are:

Code	Feature	Representation
AA	Crater	Circle of given diameter
SF	Secondary Crater	Circle of given diameter with half opacity
MO	Mountain	Triangle icon
LF	Landing Site	Flag icon
@*	Star	Star icon
@C	Circle	Circle icon

Constructor & Destructor Documentation

scm_label::scm_label	(	const std::string &	file,
		int	size
	)

Create a new label.

Render all strings to a font atlas and initialize any OpenGL state needed to render all annotations.

Parameters

file	CSV data string
size	Icon size (in pixels)

Member Function Documentation

void scm_label::draw	(	GLubyte	r,
		GLubyte	g,
		GLubyte	b,
		GLubyte	a
	)

Draw all annotations using the given color and transparency.

Parameters

r	Red
g	Green
b	Blue
a	Alpha

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

• scm-label.hpp
• scm-label.cpp