From 945f4f58d76cf41fc073f2dd65eaa66a3a316407 Mon Sep 17 00:00:00 2001 From: Diederick Niehorster Date: Fri, 16 Mar 2012 08:36:48 +0000 Subject: [PATCH] icosahedron also done wrote for easy declaring of interface functions git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@1155 7f0cb862-5218-0410-a997-914c9d46530a --- src/fg_geometry.c | 204 ++++++++++++++++++++++++----------------------------- 1 file changed, 94 insertions(+), 110 deletions(-) diff --git a/src/fg_geometry.c b/src/fg_geometry.c index 4d5d406..6226337 100644 --- a/src/fg_geometry.c +++ b/src/fg_geometry.c @@ -202,6 +202,83 @@ static GLubyte cube_vi[CUBE_VERT_PER_OBJ] = }; DECLARE_SHAPE_CACHE(cube,Cube,CUBE); +/* Icosahedron */ +#define ICOSAHEDRON_NUM_VERT 12 +#define ICOSAHEDRON_NUM_FACES 20 +#define ICOSAHEDRON_NUM_VERT_PER_FACE 3 +#define ICOSAHEDRON_VERT_PER_OBJ ICOSAHEDRON_NUM_FACES*ICOSAHEDRON_NUM_VERT_PER_FACE +#define ICOSAHEDRON_VERT_ELEM_PER_OBJ ICOSAHEDRON_VERT_PER_OBJ*3 +/* Vertex Coordinates */ +static GLdouble icosahedron_v[ICOSAHEDRON_NUM_VERT*3] = +{ + 1.0, 0.0, 0.0 , + 0.447213595500, 0.894427191000, 0.0 , + 0.447213595500, 0.276393202252, 0.850650808354, + 0.447213595500, -0.723606797748, 0.525731112119, + 0.447213595500, -0.723606797748, -0.525731112119, + 0.447213595500, 0.276393202252, -0.850650808354, + -0.447213595500, -0.894427191000, 0.0 , + -0.447213595500, -0.276393202252, 0.850650808354, + -0.447213595500, 0.723606797748, 0.525731112119, + -0.447213595500, 0.723606797748, -0.525731112119, + -0.447213595500, -0.276393202252, -0.850650808354, + -1.0, 0.0, 0.0 +}; +/* Normal Vectors: + * icosahedron_n[i][0] = ( icosahedron_v[icosahedron_vi[i][1]][1] - icosahedron_v[icosahedron_vi[i][0]][1] ) * ( icosahedron_v[icosahedron_vi[i][2]][2] - icosahedron_v[icosahedron_vi[i][0]][2] ) - ( icosahedron_v[icosahedron_vi[i][1]][2] - icosahedron_v[icosahedron_vi[i][0]][2] ) * ( icosahedron_v[icosahedron_vi[i][2]][1] - icosahedron_v[icosahedron_vi[i][0]][1] ) ; + * icosahedron_n[i][1] = ( icosahedron_v[icosahedron_vi[i][1]][2] - icosahedron_v[icosahedron_vi[i][0]][2] ) * ( icosahedron_v[icosahedron_vi[i][2]][0] - icosahedron_v[icosahedron_vi[i][0]][0] ) - ( icosahedron_v[icosahedron_vi[i][1]][0] - icosahedron_v[icosahedron_vi[i][0]][0] ) * ( icosahedron_v[icosahedron_vi[i][2]][2] - icosahedron_v[icosahedron_vi[i][0]][2] ) ; + * icosahedron_n[i][2] = ( icosahedron_v[icosahedron_vi[i][1]][0] - icosahedron_v[icosahedron_vi[i][0]][0] ) * ( icosahedron_v[icosahedron_vi[i][2]][1] - icosahedron_v[icosahedron_vi[i][0]][1] ) - ( icosahedron_v[icosahedron_vi[i][1]][1] - icosahedron_v[icosahedron_vi[i][0]][1] ) * ( icosahedron_v[icosahedron_vi[i][2]][0] - icosahedron_v[icosahedron_vi[i][0]][0] ) ; +*/ +static GLdouble icosahedron_n[ICOSAHEDRON_NUM_FACES*3] = +{ + 0.760845213037948, 0.470228201835026, 0.341640786498800, + 0.760845213036861, -0.179611190632978, 0.552786404500000, + 0.760845213033849, -0.581234022404097, 0, + 0.760845213036861, -0.179611190632978, -0.552786404500000, + 0.760845213037948, 0.470228201835026, -0.341640786498800, + 0.179611190628666, 0.760845213037948, 0.552786404498399, + 0.179611190634277, -0.290617011204044, 0.894427191000000, + 0.179611190633958, -0.940456403667806, 0, + 0.179611190634278, -0.290617011204044, -0.894427191000000, + 0.179611190628666, 0.760845213037948, -0.552786404498399, + -0.179611190633958, 0.940456403667806, 0, + -0.179611190634277, 0.290617011204044, 0.894427191000000, + -0.179611190628666, -0.760845213037948, 0.552786404498399, + -0.179611190628666, -0.760845213037948, -0.552786404498399, + -0.179611190634277, 0.290617011204044, -0.894427191000000, + -0.760845213036861, 0.179611190632978, -0.552786404500000, + -0.760845213033849, 0.581234022404097, 0, + -0.760845213036861, 0.179611190632978, 0.552786404500000, + -0.760845213037948, -0.470228201835026, 0.341640786498800, + -0.760845213037948, -0.470228201835026, -0.341640786498800, +}; + +/* Vertex indices */ +static GLubyte icosahedron_vi[ICOSAHEDRON_VERT_PER_OBJ] = +{ + 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 +}; +DECLARE_SHAPE_CACHE(icosahedron,Icosahedron,ICOSAHEDRON); + /* -- Octahedron -- */ #define OCTAHEDRON_NUM_VERT 6 #define OCTAHEDRON_NUM_FACES 8 @@ -420,6 +497,7 @@ static void fghCube( GLdouble dSize, GLboolean useWireMode ) else fghDrawGeometry(GL_QUADS,cube_verts,cube_norms,CUBE_VERT_PER_OBJ,useWireMode); } +DECLARE_INTERNAL_DRAW(icosahedron,Icosahedron,ICOSAHEDRON); DECLARE_INTERNAL_DRAW(octahedron,Octahedron,OCTAHEDRON); DECLARE_INTERNAL_DRAW(tetrahedron,Tetrahedron,TETRAHEDRON); @@ -1152,93 +1230,6 @@ void FGAPIENTRY glutSolidDodecahedron( void ) /* * */ -static double icos_r[12][3] = { - { 1.0, 0.0, 0.0 }, - { 0.447213595500, 0.894427191000, 0.0 }, - { 0.447213595500, 0.276393202252, 0.850650808354 }, - { 0.447213595500, -0.723606797748, 0.525731112119 }, - { 0.447213595500, -0.723606797748, -0.525731112119 }, - { 0.447213595500, 0.276393202252, -0.850650808354 }, - { -0.447213595500, -0.894427191000, 0.0 }, - { -0.447213595500, -0.276393202252, 0.850650808354 }, - { -0.447213595500, 0.723606797748, 0.525731112119 }, - { -0.447213595500, 0.723606797748, -0.525731112119 }, - { -0.447213595500, -0.276393202252, -0.850650808354 }, - { -1.0, 0.0, 0.0 } -}; - -static int icos_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 ) -{ - int i ; - - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireIcosahedron" ); - - for ( i = 0; i < 20; i++ ) - { - double normal[3] ; - normal[0] = ( icos_r[icos_v[i][1]][1] - icos_r[icos_v[i][0]][1] ) * ( icos_r[icos_v[i][2]][2] - icos_r[icos_v[i][0]][2] ) - ( icos_r[icos_v[i][1]][2] - icos_r[icos_v[i][0]][2] ) * ( icos_r[icos_v[i][2]][1] - icos_r[icos_v[i][0]][1] ) ; - normal[1] = ( icos_r[icos_v[i][1]][2] - icos_r[icos_v[i][0]][2] ) * ( icos_r[icos_v[i][2]][0] - icos_r[icos_v[i][0]][0] ) - ( icos_r[icos_v[i][1]][0] - icos_r[icos_v[i][0]][0] ) * ( icos_r[icos_v[i][2]][2] - icos_r[icos_v[i][0]][2] ) ; - normal[2] = ( icos_r[icos_v[i][1]][0] - icos_r[icos_v[i][0]][0] ) * ( icos_r[icos_v[i][2]][1] - icos_r[icos_v[i][0]][1] ) - ( icos_r[icos_v[i][1]][1] - icos_r[icos_v[i][0]][1] ) * ( icos_r[icos_v[i][2]][0] - icos_r[icos_v[i][0]][0] ) ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3dv ( normal ) ; - glVertex3dv ( icos_r[icos_v[i][0]] ) ; - glVertex3dv ( icos_r[icos_v[i][1]] ) ; - glVertex3dv ( icos_r[icos_v[i][2]] ) ; - glEnd () ; - } -} - -/* - * - */ -void FGAPIENTRY glutSolidIcosahedron( void ) -{ - int i ; - - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidIcosahedron" ); - - glBegin ( GL_TRIANGLES ) ; - for ( i = 0; i < 20; i++ ) - { - double normal[3] ; - normal[0] = ( icos_r[icos_v[i][1]][1] - icos_r[icos_v[i][0]][1] ) * ( icos_r[icos_v[i][2]][2] - icos_r[icos_v[i][0]][2] ) - ( icos_r[icos_v[i][1]][2] - icos_r[icos_v[i][0]][2] ) * ( icos_r[icos_v[i][2]][1] - icos_r[icos_v[i][0]][1] ) ; - normal[1] = ( icos_r[icos_v[i][1]][2] - icos_r[icos_v[i][0]][2] ) * ( icos_r[icos_v[i][2]][0] - icos_r[icos_v[i][0]][0] ) - ( icos_r[icos_v[i][1]][0] - icos_r[icos_v[i][0]][0] ) * ( icos_r[icos_v[i][2]][2] - icos_r[icos_v[i][0]][2] ) ; - normal[2] = ( icos_r[icos_v[i][1]][0] - icos_r[icos_v[i][0]][0] ) * ( icos_r[icos_v[i][2]][1] - icos_r[icos_v[i][0]][1] ) - ( icos_r[icos_v[i][1]][1] - icos_r[icos_v[i][0]][1] ) * ( icos_r[icos_v[i][2]][0] - icos_r[icos_v[i][0]][0] ) ; - glNormal3dv ( normal ) ; - glVertex3dv ( icos_r[icos_v[i][0]] ) ; - glVertex3dv ( icos_r[icos_v[i][1]] ) ; - glVertex3dv ( icos_r[icos_v[i][2]] ) ; - } - - glEnd () ; -} - -/* - * - */ static double rdod_r[14][3] = { { 0.0, 0.0, 1.0 }, { 0.707106781187, 0.000000000000, 0.5 }, @@ -1329,9 +1320,19 @@ void FGAPIENTRY glutSolidRhombicDodecahedron( void ) /* -- INTERFACE FUNCTIONS -------------------------------------------------- */ -/* - * Draws a wireframed cube. - */ +/* Macro to generate interface functions */ +#define DECLARE_SHAPE_INTERFACE(nameICaps)\ + void FGAPIENTRY glutWire##nameICaps( void )\ + {\ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWire"#nameICaps );\ + fgh##nameICaps( TRUE );\ + }\ + void FGAPIENTRY glutSolid##nameICaps( void )\ + {\ + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolid"#nameICaps );\ + fgh##nameICaps( FALSE );\ + } + void FGAPIENTRY glutWireCube( GLdouble dSize ) { FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireCube" ); @@ -1343,16 +1344,8 @@ void FGAPIENTRY glutSolidCube( GLdouble dSize ) fghCube( dSize, FALSE ); } -void FGAPIENTRY glutWireOctahedron( void ) -{ - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireOctahedron" ); - fghOctahedron( TRUE ); -} -void FGAPIENTRY glutSolidOctahedron( void ) -{ - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidOctahedron" ); - fghOctahedron( FALSE ); -} +DECLARE_SHAPE_INTERFACE(Icosahedron); +DECLARE_SHAPE_INTERFACE(Octahedron); void FGAPIENTRY glutWireSierpinskiSponge ( int num_levels, GLdouble offset[3], GLdouble scale ) { @@ -1365,16 +1358,7 @@ void FGAPIENTRY glutSolidSierpinskiSponge ( int num_levels, GLdouble offset[3], fghSierpinskiSponge ( num_levels, offset, scale, FALSE ); } -void FGAPIENTRY glutWireTetrahedron( void ) -{ - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireTetrahedron" ); - fghTetrahedron( TRUE ); -} -void FGAPIENTRY glutSolidTetrahedron( void ) -{ - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidTetrahedron" ); - fghTetrahedron( FALSE ); -} +DECLARE_SHAPE_INTERFACE(Tetrahedron); /*** END OF FILE ***/ -- 1.7.10.4