Implemented tetrahedra, octahedra, dodecahedra, and icosahedra. Checked in on behalf of John F. Fay <john.fay@eglin.af.mil>.
git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@28 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
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@ -478,7 +478,49 @@ void FGAPIENTRY glutSolidTorus( GLdouble dInnerRadius, GLdouble dOuterRadius, GL
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*/
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void FGAPIENTRY glutWireDodecahedron( void )
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{
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glutWireSphere( 1.0, 5, 5 );
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/* Magic Numbers: It is possible to create a dodecahedron by attaching two pentagons to each face of
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* of a cube. The coordinates of the points are:
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* (+-x,0, z); (+-1, 1, 1); (0, z, x )
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* where x = 0.618033989 and z = 1.618033939.
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*/
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( 0.000000f, 0.525731f, 0.850651f ) ; glVertex3f ( 0.000000f, 1.618034f, 0.618034f ) ; glVertex3f ( -1.0f, 1.0f, 1.0f ) ; glVertex3f ( -0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( 0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( 1.0f, 1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( 0.000000f, 0.525731f, -0.850651f ) ; glVertex3f ( 0.000000f, 1.618034f, -0.618034f ) ; glVertex3f ( 1.0f, 1.0f, -1.0f ) ; glVertex3f ( 0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( -0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( -1.0f, 1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( 0.000000f, -0.525731f, 0.850651f ) ; glVertex3f ( 0.000000f, -1.618034f, 0.618034f ) ; glVertex3f ( 1.0f, -1.0f, 1.0f ) ; glVertex3f ( 0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( -0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( -1.0f, -1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( 0.000000f, -0.525731f, -0.850651f ) ; glVertex3f ( 0.000000f, -1.618034f, -0.618034f ) ; glVertex3f ( -1.0f, -1.0f, -1.0f ) ; glVertex3f ( -0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( 0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( 1.0f, -1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( 0.850651f, 0.000000f, 0.525731f ) ; glVertex3f ( 0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( 1.0f, -1.0f, 1.0f ) ; glVertex3f ( 1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( 1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( 1.0f, 1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( -0.850651f, 0.000000f, 0.525731f ) ; glVertex3f ( -0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( -1.0f, 1.0f, 1.0f ) ; glVertex3f ( -1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( -1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( -1.0f, -1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( 0.850651f, 0.000000f, -0.525731f ) ; glVertex3f ( 0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( 1.0f, 1.0f, -1.0f ) ; glVertex3f ( 1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( 1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( 1.0f, -1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( -0.850651f, 0.000000f, -0.525731f ) ; glVertex3f ( -0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( -1.0f, -1.0f, -1.0f ) ; glVertex3f ( -1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( -1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( -1.0f, 1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( 0.525731f, 0.850651f, 0.000000f ) ; glVertex3f ( 1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( 1.0f, 1.0f, -1.0f ) ; glVertex3f ( 0.000000f, 1.618034f, -0.618034f ) ; glVertex3f ( 0.000000f, 1.618034f, 0.618034f ) ; glVertex3f ( 1.0f, 1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( 0.525731f, -0.850651f, 0.000000f ) ; glVertex3f ( 1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( 1.0f, -1.0f, 1.0f ) ; glVertex3f ( 0.000000f, -1.618034f, 0.618034f ) ; glVertex3f ( 0.000000f, -1.618034f, -0.618034f ) ; glVertex3f ( 1.0f, -1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( -0.525731f, 0.850651f, 0.000000f ) ; glVertex3f ( -1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( -1.0f, 1.0f, 1.0f ) ; glVertex3f ( 0.000000f, 1.618034f, 0.618034f ) ; glVertex3f ( 0.000000f, 1.618034f, -0.618034f ) ; glVertex3f ( -1.0f, 1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_LINE_LOOP ) ;
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glNormal3f ( -0.525731f, -0.850651f, 0.000000f ) ; glVertex3f ( -1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( -1.0f, -1.0f, -1.0f ) ; glVertex3f ( 0.000000f, -1.618034f, -0.618034f ) ; glVertex3f ( 0.000000f, -1.618034f, 0.618034f ) ; glVertex3f ( -1.0f, -1.0f, 1.0f ) ;
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glEnd () ;
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}
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/*
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@ -486,7 +528,49 @@ void FGAPIENTRY glutWireDodecahedron( void )
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*/
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void FGAPIENTRY glutSolidDodecahedron( void )
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{
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glutSolidSphere( 1.0, 5, 5 );
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/* Magic Numbers: It is possible to create a dodecahedron by attaching two pentagons to each face of
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* of a cube. The coordinates of the points are:
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* (+-x,0, z); (+-1, 1, 1); (0, z, x )
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* where x = 0.618033989 and z = 1.618033939.
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*/
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( 0.000000f, 0.525731f, 0.850651f ) ; glVertex3f ( 0.000000f, 1.618034f, 0.618034f ) ; glVertex3f ( -1.0f, 1.0f, 1.0f ) ; glVertex3f ( -0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( 0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( 1.0f, 1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( 0.000000f, 0.525731f, -0.850651f ) ; glVertex3f ( 0.000000f, 1.618034f, -0.618034f ) ; glVertex3f ( 1.0f, 1.0f, -1.0f ) ; glVertex3f ( 0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( -0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( -1.0f, 1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( 0.000000f, -0.525731f, 0.850651f ) ; glVertex3f ( 0.000000f, -1.618034f, 0.618034f ) ; glVertex3f ( 1.0f, -1.0f, 1.0f ) ; glVertex3f ( 0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( -0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( -1.0f, -1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( 0.000000f, -0.525731f, -0.850651f ) ; glVertex3f ( 0.000000f, -1.618034f, -0.618034f ) ; glVertex3f ( -1.0f, -1.0f, -1.0f ) ; glVertex3f ( -0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( 0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( 1.0f, -1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( 0.850651f, 0.000000f, 0.525731f ) ; glVertex3f ( 0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( 1.0f, -1.0f, 1.0f ) ; glVertex3f ( 1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( 1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( 1.0f, 1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( -0.850651f, 0.000000f, 0.525731f ) ; glVertex3f ( -0.618034f, 0.000000f, 1.618034f ) ; glVertex3f ( -1.0f, 1.0f, 1.0f ) ; glVertex3f ( -1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( -1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( -1.0f, -1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( 0.850651f, 0.000000f, -0.525731f ) ; glVertex3f ( 0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( 1.0f, 1.0f, -1.0f ) ; glVertex3f ( 1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( 1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( 1.0f, -1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( -0.850651f, 0.000000f, -0.525731f ) ; glVertex3f ( -0.618034f, 0.000000f, -1.618034f ) ; glVertex3f ( -1.0f, -1.0f, -1.0f ) ; glVertex3f ( -1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( -1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( -1.0f, 1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( 0.525731f, 0.850651f, 0.000000f ) ; glVertex3f ( 1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( 1.0f, 1.0f, -1.0f ) ; glVertex3f ( 0.000000f, 1.618034f, -0.618034f ) ; glVertex3f ( 0.000000f, 1.618034f, 0.618034f ) ; glVertex3f ( 1.0f, 1.0f, 1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( 0.525731f, -0.850651f, 0.000000f ) ; glVertex3f ( 1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( 1.0f, -1.0f, 1.0f ) ; glVertex3f ( 0.000000f, -1.618034f, 0.618034f ) ; glVertex3f ( 0.000000f, -1.618034f, -0.618034f ) ; glVertex3f ( 1.0f, -1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( -0.525731f, 0.850651f, 0.000000f ) ; glVertex3f ( -1.618034f, 0.618034f, 0.000000f ) ; glVertex3f ( -1.0f, 1.0f, 1.0f ) ; glVertex3f ( 0.000000f, 1.618034f, 0.618034f ) ; glVertex3f ( 0.000000f, 1.618034f, -0.618034f ) ; glVertex3f ( -1.0f, 1.0f, -1.0f ) ;
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glEnd () ;
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glBegin ( GL_POLYGON ) ;
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glNormal3f ( -0.525731f, -0.850651f, 0.000000f ) ; glVertex3f ( -1.618034f, -0.618034f, 0.000000f ) ; glVertex3f ( -1.0f, -1.0f, -1.0f ) ; glVertex3f ( 0.000000f, -1.618034f, -0.618034f ) ; glVertex3f ( 0.000000f, -1.618034f, 0.618034f ) ; glVertex3f ( -1.0f, -1.0f, 1.0f ) ;
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glEnd () ;
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}
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/*
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@ -494,7 +578,18 @@ void FGAPIENTRY glutSolidDodecahedron( void )
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*/
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void FGAPIENTRY glutWireOctahedron( void )
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{
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glutWireSphere( 1.0, 5, 5 );
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#define RADIUS 1.0f
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glBegin( GL_LINE_LOOP );
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glNormal3f( 0.577350f, 0.577350f, 0.577350f); glVertex3f( RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f, RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f, RADIUS );
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glNormal3f( 0.577350f, 0.577350f,-0.577350f); glVertex3f( RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f, RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f,-RADIUS );
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glNormal3f( 0.577350f,-0.577350f, 0.577350f); glVertex3f( RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f,-RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f, RADIUS );
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glNormal3f( 0.577350f,-0.577350f,-0.577350f); glVertex3f( RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f,-RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f,-RADIUS );
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glNormal3f(-0.577350f, 0.577350f, 0.577350f); glVertex3f(-RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f, RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f, RADIUS );
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glNormal3f(-0.577350f, 0.577350f,-0.577350f); glVertex3f(-RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f, RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f,-RADIUS );
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glNormal3f(-0.577350f,-0.577350f, 0.577350f); glVertex3f(-RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f,-RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f, RADIUS );
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glNormal3f(-0.577350f,-0.577350f,-0.577350f); glVertex3f(-RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f,-RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f,-RADIUS );
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glEnd();
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#undef RADIUS
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}
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/*
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@ -502,7 +597,18 @@ void FGAPIENTRY glutWireOctahedron( void )
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*/
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void FGAPIENTRY glutSolidOctahedron( void )
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{
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glutSolidSphere( 1.0, 5, 5 );
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#define RADIUS 1.0f
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glBegin( GL_TRIANGLES );
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glNormal3f( 0.577350f, 0.577350f, 0.577350f); glVertex3f( RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f, RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f, RADIUS );
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glNormal3f( 0.577350f, 0.577350f,-0.577350f); glVertex3f( RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f, RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f,-RADIUS );
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glNormal3f( 0.577350f,-0.577350f, 0.577350f); glVertex3f( RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f,-RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f, RADIUS );
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glNormal3f( 0.577350f,-0.577350f,-0.577350f); glVertex3f( RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f,-RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f,-RADIUS );
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glNormal3f(-0.577350f, 0.577350f, 0.577350f); glVertex3f(-RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f, RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f, RADIUS );
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glNormal3f(-0.577350f, 0.577350f,-0.577350f); glVertex3f(-RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f, RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f,-RADIUS );
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glNormal3f(-0.577350f,-0.577350f, 0.577350f); glVertex3f(-RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f,-RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f, RADIUS );
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glNormal3f(-0.577350f,-0.577350f,-0.577350f); glVertex3f(-RADIUS, 0.0f, 0.0f ); glVertex3f( 0.0f,-RADIUS, 0.0f ); glVertex3f( 0.0f, 0.0f,-RADIUS );
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glEnd();
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#undef RADIUS
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}
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/*
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@ -510,7 +616,27 @@ void FGAPIENTRY glutSolidOctahedron( void )
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*/
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void FGAPIENTRY glutWireTetrahedron( void )
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{
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glutWireSphere( 1.0, 5, 5 );
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/* Magic Numbers: r0 = ( 1, 0, 0 )
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* r1 = ( -1/3, 2 sqrt(2) / 3, 0 )
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* r2 = ( -1/3, -sqrt(2) / 3, sqrt(6) / 3 )
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* r3 = ( -1/3, -sqrt(2) / 3, -sqrt(6) / 3 )
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* |r0| = |r1| = |r2| = |r3| = 1
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* Distance between any two points is 2 sqrt(6) / 3
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*
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* Normals: The unit normals are simply the negative of the coordinates of the point not on the surface.
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*/
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float r0[3] = { 1.0f, 0.0f, 0.0f } ;
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float r1[3] = { -0.333333f, 0.942809f, 0.0f } ;
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float r2[3] = { -0.333333f, -0.471405f, 0.816497f } ;
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float r3[3] = { -0.333333f, -0.471405f, -0.816497f } ;
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glBegin( GL_LINE_LOOP ) ;
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glNormal3f ( -1.0f, 0.0f, 0.0f ) ; glVertex3fv ( r1 ) ; glVertex3fv ( r3 ) ; glVertex3fv ( r2 ) ;
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glNormal3f ( 0.333333f, -0.942809f, 0.0f ) ; glVertex3fv ( r0 ) ; glVertex3fv ( r2 ) ; glVertex3fv ( r3 ) ;
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glNormal3f ( 0.333333f, 0.471405f, -0.816497f ) ; glVertex3fv ( r0 ) ; glVertex3fv ( r3 ) ; glVertex3fv ( r1 ) ;
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glNormal3f ( 0.333333f, 0.471405f, 0.816497f ) ; glVertex3fv ( r0 ) ; glVertex3fv ( r1 ) ; glVertex3fv ( r2 ) ;
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glEnd() ;
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}
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/*
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@ -518,15 +644,57 @@ void FGAPIENTRY glutWireTetrahedron( void )
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*/
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void FGAPIENTRY glutSolidTetrahedron( void )
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{
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glutSolidSphere( 1.0, 5, 5 );
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/* Magic Numbers: r0 = ( 1, 0, 0 )
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* r1 = ( -1/3, 2 sqrt(2) / 3, 0 )
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* r2 = ( -1/3, -sqrt(2) / 3, sqrt(6) / 3 )
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* r3 = ( -1/3, -sqrt(2) / 3, -sqrt(6) / 3 )
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* |r0| = |r1| = |r2| = |r3| = 1
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* Distance between any two points is 2 sqrt(6) / 3
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*
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* Normals: The unit normals are simply the negative of the coordinates of the point not on the surface.
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*/
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float r0[3] = { 1.0f, 0.0f, 0.0f } ;
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float r1[3] = { -0.333333f, 0.942809f, 0.0f } ;
|
||||
float r2[3] = { -0.333333f, -0.471405f, 0.816497f } ;
|
||||
float r3[3] = { -0.333333f, -0.471405f, -0.816497f } ;
|
||||
|
||||
glBegin( GL_TRIANGLES ) ;
|
||||
glNormal3f ( -1.0f, 0.0f, 0.0f ) ; glVertex3fv ( r1 ) ; glVertex3fv ( r3 ) ; glVertex3fv ( r2 ) ;
|
||||
glNormal3f ( 0.333333f, -0.942809f, 0.0f ) ; glVertex3fv ( r0 ) ; glVertex3fv ( r2 ) ; glVertex3fv ( r3 ) ;
|
||||
glNormal3f ( 0.333333f, 0.471405f, -0.816497f ) ; glVertex3fv ( r0 ) ; glVertex3fv ( r3 ) ; glVertex3fv ( r1 ) ;
|
||||
glNormal3f ( 0.333333f, 0.471405f, 0.816497f ) ; glVertex3fv ( r0 ) ; glVertex3fv ( r1 ) ; glVertex3fv ( r2 ) ;
|
||||
glEnd() ;
|
||||
}
|
||||
|
||||
/*
|
||||
*
|
||||
*/
|
||||
float r[12][3] = { { 1.0f, 0.0f, 0.0f },
|
||||
{ 0.447214f, 0.894427f, 0.0f }, { 0.447214f, 0.276393f, 0.850651f }, { 0.447214f, -0.723607f, 0.525731f }, { 0.447214f, -0.723607f, -0.525731f }, { 0.447214f, 0.276393f, -0.850651f },
|
||||
{ -0.447214f, -0.894427f, 0.0f }, { -0.447214f, -0.276393f, 0.850651f }, { -0.447214f, 0.723607f, 0.525731f }, { -0.447214f, 0.723607f, -0.525731f }, { -0.447214f, -0.276393f, -0.850651f },
|
||||
{ -1.0f, 0.0f, 0.0f } } ;
|
||||
int v [20][3] = { { 0, 1, 2 }, { 0, 2, 3 }, { 0, 3, 4 }, { 0, 4, 5 }, { 0, 5, 1 },
|
||||
{ 1, 8, 2 }, { 2, 7, 3 }, { 3, 6, 4 }, { 4, 10, 5 }, { 5, 9, 1 },
|
||||
{ 1, 9, 8 }, { 2, 8, 7 }, { 3, 7, 6 }, { 4, 6, 10 }, { 5, 10, 9 },
|
||||
{ 11, 9, 10 }, { 11, 8, 9 }, { 11, 7, 8 }, { 11, 6, 7 }, { 11, 10, 6 } } ;
|
||||
|
||||
void FGAPIENTRY glutWireIcosahedron( void )
|
||||
{
|
||||
glutWireSphere( 1.0, 5, 5 );
|
||||
int i ;
|
||||
for ( i = 0; i < 20; i++ )
|
||||
{
|
||||
float normal[3] ;
|
||||
normal[0] = ( r[v[i][1]][1] - r[v[i][0]][1] ) * ( r[v[i][2]][2] - r[v[i][0]][2] ) - ( r[v[i][1]][2] - r[v[i][0]][2] ) * ( r[v[i][2]][1] - r[v[i][0]][1] ) ;
|
||||
normal[1] = ( r[v[i][1]][2] - r[v[i][0]][2] ) * ( r[v[i][2]][0] - r[v[i][0]][0] ) - ( r[v[i][1]][0] - r[v[i][0]][0] ) * ( r[v[i][2]][2] - r[v[i][0]][2] ) ;
|
||||
normal[2] = ( r[v[i][1]][0] - r[v[i][0]][0] ) * ( r[v[i][2]][1] - r[v[i][0]][1] ) - ( r[v[i][1]][1] - r[v[i][0]][1] ) * ( r[v[i][2]][0] - r[v[i][0]][0] ) ;
|
||||
glBegin ( GL_LINE_LOOP ) ;
|
||||
glNormal3fv ( normal ) ;
|
||||
glVertex3fv ( r[v[i][0]] ) ;
|
||||
glVertex3fv ( r[v[i][1]] ) ;
|
||||
glVertex3fv ( r[v[i][2]] ) ;
|
||||
glEnd () ;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
@ -534,7 +702,22 @@ void FGAPIENTRY glutWireIcosahedron( void )
|
||||
*/
|
||||
void FGAPIENTRY glutSolidIcosahedron( void )
|
||||
{
|
||||
glutSolidSphere( 1.0, 5, 5 );
|
||||
int i ;
|
||||
|
||||
glBegin ( GL_TRIANGLES ) ;
|
||||
for ( i = 0; i < 20; i++ )
|
||||
{
|
||||
float normal[3] ;
|
||||
normal[0] = ( r[v[i][1]][1] - r[v[i][0]][1] ) * ( r[v[i][2]][2] - r[v[i][0]][2] ) - ( r[v[i][1]][2] - r[v[i][0]][2] ) * ( r[v[i][2]][1] - r[v[i][0]][1] ) ;
|
||||
normal[1] = ( r[v[i][1]][2] - r[v[i][0]][2] ) * ( r[v[i][2]][0] - r[v[i][0]][0] ) - ( r[v[i][1]][0] - r[v[i][0]][0] ) * ( r[v[i][2]][2] - r[v[i][0]][2] ) ;
|
||||
normal[2] = ( r[v[i][1]][0] - r[v[i][0]][0] ) * ( r[v[i][2]][1] - r[v[i][0]][1] ) - ( r[v[i][1]][1] - r[v[i][0]][1] ) * ( r[v[i][2]][0] - r[v[i][0]][0] ) ;
|
||||
glNormal3fv ( normal ) ;
|
||||
glVertex3fv ( r[v[i][0]] ) ;
|
||||
glVertex3fv ( r[v[i][1]] ) ;
|
||||
glVertex3fv ( r[v[i][2]] ) ;
|
||||
}
|
||||
|
||||
glEnd () ;
|
||||
}
|
||||
|
||||
/*** END OF FILE ***/
|
||||
|
||||
Reference in New Issue
Block a user