gcu::Sphere Class Reference

#include <gcu/sphere.h>

Public Member Functions
void	setup (int detail)
void	draw (Vector const &center, double radius) const

Protected Member Functions
unsigned short	indexOfVertex (int strip, int column, int row)
void	computeVertex (int strip, int column, int row)

Detailed Description

This class represents and draws a sphere. The level of detail can be controlled. At level 0, the sphere is a octahedron. At levels >=1, the sphere is a "geosphere", that is, one starts with an icosahedron, which is the regular solid with 20 triangular faces, and one then sub-tesselates each face into smaller triangles. This is a classical tesselation, known to give a very good quality/complexity ratio.

Author

Benoit Jacob jacob.nosp@m.@mat.nosp@m.h.jus.nosp@m.sieu.nosp@m..fr

Definition at line 46 of file sphere.h.

Member Function Documentation

void gcu::Sphere::computeVertex ( int  strip, int  column, int  row  )

protected

computes the coordinates of a vertex given by its position (strip, column, row) inside a certain flat model of the sub-tesselated icosahedron

void gcu::Sphere::draw	(	Vector const &	center,
		double	radius
	)		const

draws the sphere at specified position and with specified radius

unsigned short gcu::Sphere::indexOfVertex ( int  strip, int  column, int  row  )

inlineprotected

computes the index (position inside the index buffer) of a vertex given by its position (strip, column, row) inside a certain flat model of the sub-tesselated icosahedron

void gcu::Sphere::setup

(

int

detail

)

initializes the sphere with given level of detail. If the

sphere was already initialized, any pre-allocated buffers are freed and then re-allocated.

Parameters

detail

the wanted level of detail. See m_detail member

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

• sphere.h