X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Ffg_geometry.c;h=2c6f344c2fdb245e3d5cf5d403f0ec606e2245d7;hb=da66462c2b7ce3185bc714cbabade787291c5c6f;hp=3a19a3b021b223c7297766fd4c7eecd97f54fc8c;hpb=9634525a2e112501938d7cc5c48ce75f8b975a38;p=freeglut diff --git a/src/fg_geometry.c b/src/fg_geometry.c index 3a19a3b..2c6f344 100644 --- a/src/fg_geometry.c +++ b/src/fg_geometry.c @@ -29,73 +29,451 @@ #include "fg_internal.h" /* - * TODO BEFORE THE STABLE RELEASE: - * - * See fghTetrahedron - * - * Following functions have been contributed by Andreas Umbach. - * - * glutWireCube() -- looks OK - * glutSolidCube() -- OK - * - * Those functions have been implemented by John Fay. - * - * glutWireTorus() -- looks OK - * glutSolidTorus() -- looks OK - * glutWireDodecahedron() -- looks OK - * glutSolidDodecahedron() -- looks OK - * glutWireOctahedron() -- looks OK - * glutSolidOctahedron() -- looks OK - * glutWireTetrahedron() -- looks OK - * glutSolidTetrahedron() -- looks OK - * glutWireIcosahedron() -- looks OK - * glutSolidIcosahedron() -- looks OK - * - * The Following functions have been updated by Nigel Stewart, based - * on FreeGLUT 2.0.0 implementations: - * - * glutWireSphere() -- looks OK - * glutSolidSphere() -- looks OK - * glutWireCone() -- looks OK - * glutSolidCone() -- looks OK + * Need more types of polyhedra? See CPolyhedron in MRPT */ -/* - * General function for drawing geometry. As for all geometry we have no - * redundancy (or hardly any in the case of cones and cylinders) in terms - * of the vertex/normal combinations, we just use glDrawArrays. - * useWireMode controls the drawing of solids (false) or wire frame - * versions (TRUE) of the geometry you pass +/* General functions for drawing geometry + * Solids are drawn by glDrawArrays if composed of triangles, or by + * glDrawElements if consisting of squares or pentagons that were + * decomposed into triangles (some vertices are repeated in that case). + * WireFrame drawing will have to be done per face, using GL_LINE_LOOP and + * issuing one draw call per face. Always use glDrawArrays as no triangle + * decomposition needed. We use the "first" parameter in glDrawArrays to go + * from face to face. */ -static void fghDrawGeometry(GLenum vertexMode, double* vertices, double* normals, GLsizei numVertices, GLboolean useWireMode) +static void fghDrawGeometryWire(GLdouble *vertices, GLdouble *normals, GLsizei numFaces, GLsizei numEdgePerFace) { - if (useWireMode) - { - glPushAttrib(GL_POLYGON_BIT); - glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); - } + int i; + + glEnableClientState(GL_VERTEX_ARRAY); + glEnableClientState(GL_NORMAL_ARRAY); + + glVertexPointer(3, GL_DOUBLE, 0, vertices); + glNormalPointer(GL_DOUBLE, 0, normals); + + /* Draw per face (TODO: could use glMultiDrawArrays if available) */ + for (i=0; i 0 ) + { + GLdouble local_offset[3] ; /* Use a local variable to avoid buildup of roundoff errors */ + unsigned int stride = ipow(4,--numLevels)*TETRAHEDRON_VERT_ELEM_PER_OBJ; + scale /= 2.0 ; + for ( i = 0 ; i < TETRAHEDRON_NUM_FACES ; i++ ) + { + int idx = i*3; + local_offset[0] = offset[0] + scale * tetrahedron_v[idx ]; + local_offset[1] = offset[1] + scale * tetrahedron_v[idx+1]; + local_offset[2] = offset[2] + scale * tetrahedron_v[idx+2]; + fghSierpinskiSpongeGenerate ( numLevels, local_offset, scale, vertices+i*stride, normals+i*stride ); } } } /* -- Now the various shapes involving circles -- */ /* - * Compute lookup table of cos and sin values forming a cirle + * Compute lookup table of cos and sin values forming a circle * * Notes: * It is the responsibility of the caller to free these tables @@ -214,70 +617,115 @@ static void fghCircleTable(double **sint,double **cost,const int n) } -/* -- INTERNAL DRAWING functions to avoid code duplication ------------- */ +/* -- INTERNAL DRAWING functions --------------------------------------- */ +#define _DECLARE_INTERNAL_DRAW_DO_DECLARE(name,nameICaps,nameCaps,vertIdxs)\ + static void fgh##nameICaps( GLboolean useWireMode )\ + {\ + if (!name##Cached)\ + {\ + fgh##nameICaps##Generate();\ + name##Cached = GL_TRUE;\ + }\ + \ + if (useWireMode)\ + {\ + fghDrawGeometryWire (name##_verts,name##_norms,\ + nameCaps##_NUM_FACES,nameCaps##_NUM_EDGE_PER_FACE);\ + }\ + else\ + {\ + fghDrawGeometrySolid(name##_verts,name##_norms,vertIdxs,\ + nameCaps##_VERT_PER_OBJ_TRI, nameCaps##_NUM_EDGE_PER_FACE);\ + }\ + } +#define DECLARE_INTERNAL_DRAW(name,nameICaps,nameCaps) _DECLARE_INTERNAL_DRAW_DO_DECLARE(name,nameICaps,nameCaps,NULL) +#define DECLARE_INTERNAL_DRAW_DECOMPOSED_TO_TRIANGLE(name,nameICaps,nameCaps) _DECLARE_INTERNAL_DRAW_DO_DECLARE(name,nameICaps,nameCaps,name##_vertIdxs) -static void fghTetrahedron( GLboolean useWireMode ) +static void fghCube( GLdouble dSize, GLboolean useWireMode ) { - if (!tetrCached) - fghTetrahedronCache(); - - fghDrawGeometry(GL_TRIANGLES,tetr_verts,tetr_norms,TETR_NUM_FACES*TETR_NUM_VERT_PER_FACE,useWireMode); -} + GLdouble *vertices; + if (!cubeCached) + { + fghCubeGenerate(); + cubeCached = GL_TRUE; + } -/* -- INTERFACE FUNCTIONS ---------------------------------------------- */ + if (dSize!=1.) + { + /* Need to build new vertex list containing vertices for cube of different size */ + int i; -/* - * Draws a wireframed cube. Code contributed by Andreas Umbach - */ -void FGAPIENTRY glutWireCube( GLdouble dSize ) -{ - double size = dSize * 0.5; + vertices = malloc(CUBE_VERT_ELEM_PER_OBJ * sizeof(GLdouble)); - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireCube" ); + /* Bail out if memory allocation fails, fgError never returns */ + if (!vertices) + { + free(vertices); + fgError("Failed to allocate memory in fghCube"); + } -# define V(a,b,c) glVertex3d( a size, b size, c size ); -# define N(a,b,c) glNormal3d( a, b, c ); + for (i=0; i - */ -void FGAPIENTRY glutSolidCube( GLdouble dSize ) +DECLARE_INTERNAL_DRAW_DECOMPOSED_TO_TRIANGLE(dodecahedron,Dodecahedron,DODECAHEDRON); +DECLARE_INTERNAL_DRAW(icosahedron,Icosahedron,ICOSAHEDRON); +DECLARE_INTERNAL_DRAW(octahedron,Octahedron,OCTAHEDRON); +DECLARE_INTERNAL_DRAW_DECOMPOSED_TO_TRIANGLE(rhombicdodecahedron,RhombicDodecahedron,RHOMBICDODECAHEDRON); +DECLARE_INTERNAL_DRAW(tetrahedron,Tetrahedron,TETRAHEDRON); + +static void fghSierpinskiSponge ( int numLevels, GLdouble offset[3], GLdouble scale, GLboolean useWireMode ) { - double size = dSize * 0.5; + GLdouble *vertices; + GLdouble * normals; + GLsizei numTetr = numLevels<0? 0 : ipow(4,numLevels); /* No sponge for numLevels below 0 */ + GLsizei numVert = numTetr*TETRAHEDRON_VERT_PER_OBJ; + GLsizei numFace = numTetr*TETRAHEDRON_NUM_FACES; - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidCube" ); + if (numTetr) + { + /* Allocate memory */ + vertices = malloc(numVert*3 * sizeof(GLdouble)); + normals = malloc(numVert*3 * sizeof(GLdouble)); + /* Bail out if memory allocation fails, fgError never returns */ + if (!vertices || !normals) + { + free(vertices); + free(normals); + fgError("Failed to allocate memory in fghSierpinskiSponge"); + } -# define V(a,b,c) glVertex3d( a size, b size, c size ); -# define N(a,b,c) glNormal3d( a, b, c ); + /* Generate elements */ + fghSierpinskiSpongeGenerate ( numLevels, offset, scale, vertices, normals ); - /* PWO: Again, I dared to convert the code to use macros... */ - glBegin( GL_QUADS ); - N( 1.0, 0.0, 0.0); V(+,-,+); V(+,-,-); V(+,+,-); V(+,+,+); - N( 0.0, 1.0, 0.0); V(+,+,+); V(+,+,-); V(-,+,-); V(-,+,+); - N( 0.0, 0.0, 1.0); V(+,+,+); V(-,+,+); V(-,-,+); V(+,-,+); - N(-1.0, 0.0, 0.0); V(-,-,+); V(-,+,+); V(-,+,-); V(-,-,-); - N( 0.0,-1.0, 0.0); V(-,-,+); V(-,-,-); V(+,-,-); V(+,-,+); - N( 0.0, 0.0,-1.0); V(-,-,-); V(-,+,-); V(+,+,-); V(+,-,-); - glEnd(); + /* Draw and cleanup */ + if (useWireMode) + fghDrawGeometryWire (vertices,normals, numFace,TETRAHEDRON_NUM_EDGE_PER_FACE); + else + fghDrawGeometrySolid(vertices,normals,NULL,numVert, TETRAHEDRON_NUM_EDGE_PER_FACE); -# undef V -# undef N + free(vertices); + free(normals ); + } } +/* -- INTERFACE FUNCTIONS ---------------------------------------------- */ + + /* * Draws a solid sphere */ @@ -871,426 +1319,50 @@ void FGAPIENTRY glutSolidTorus( GLdouble dInnerRadius, GLdouble dOuterRadius, GL glPopMatrix(); } -/* - * - */ -void FGAPIENTRY glutWireDodecahedron( void ) -{ - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireDodecahedron" ); - - /* Magic Numbers: It is possible to create a dodecahedron by attaching two pentagons to each face of - * of a cube. The coordinates of the points are: - * (+-x,0, z); (+-1, 1, 1); (0, z, x ) - * where x = (-1 + sqrt(5))/2, z = (1 + sqrt(5))/2 or - * x = 0.61803398875 and z = 1.61803398875. - */ - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( 0.0, 0.525731112119, 0.850650808354 ) ; glVertex3d ( 0.0, 1.61803398875, 0.61803398875 ) ; glVertex3d ( -1.0, 1.0, 1.0 ) ; glVertex3d ( -0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( 0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( 1.0, 1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( 0.0, 0.525731112119, -0.850650808354 ) ; glVertex3d ( 0.0, 1.61803398875, -0.61803398875 ) ; glVertex3d ( 1.0, 1.0, -1.0 ) ; glVertex3d ( 0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( -0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( -1.0, 1.0, -1.0 ) ; - glEnd () ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( 0.0, -0.525731112119, 0.850650808354 ) ; glVertex3d ( 0.0, -1.61803398875, 0.61803398875 ) ; glVertex3d ( 1.0, -1.0, 1.0 ) ; glVertex3d ( 0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( -0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( -1.0, -1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( 0.0, -0.525731112119, -0.850650808354 ) ; glVertex3d ( 0.0, -1.61803398875, -0.61803398875 ) ; glVertex3d ( -1.0, -1.0, -1.0 ) ; glVertex3d ( -0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( 0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( 1.0, -1.0, -1.0 ) ; - glEnd () ; - - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( 0.850650808354, 0.0, 0.525731112119 ) ; glVertex3d ( 0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( 1.0, -1.0, 1.0 ) ; glVertex3d ( 1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( 1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( 1.0, 1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( -0.850650808354, 0.0, 0.525731112119 ) ; glVertex3d ( -0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( -1.0, 1.0, 1.0 ) ; glVertex3d ( -1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( -1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( -1.0, -1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( 0.850650808354, 0.0, -0.525731112119 ) ; glVertex3d ( 0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( 1.0, 1.0, -1.0 ) ; glVertex3d ( 1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( 1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( 1.0, -1.0, -1.0 ) ; - glEnd () ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( -0.850650808354, 0.0, -0.525731112119 ) ; glVertex3d ( -0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( -1.0, -1.0, -1.0 ) ; glVertex3d ( -1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( -1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( -1.0, 1.0, -1.0 ) ; - glEnd () ; - - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( 0.525731112119, 0.850650808354, 0.0 ) ; glVertex3d ( 1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( 1.0, 1.0, -1.0 ) ; glVertex3d ( 0.0, 1.61803398875, -0.61803398875 ) ; glVertex3d ( 0.0, 1.61803398875, 0.61803398875 ) ; glVertex3d ( 1.0, 1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( 0.525731112119, -0.850650808354, 0.0 ) ; glVertex3d ( 1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( 1.0, -1.0, 1.0 ) ; glVertex3d ( 0.0, -1.61803398875, 0.61803398875 ) ; glVertex3d ( 0.0, -1.61803398875, -0.61803398875 ) ; glVertex3d ( 1.0, -1.0, -1.0 ) ; - glEnd () ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( -0.525731112119, 0.850650808354, 0.0 ) ; glVertex3d ( -1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( -1.0, 1.0, 1.0 ) ; glVertex3d ( 0.0, 1.61803398875, 0.61803398875 ) ; glVertex3d ( 0.0, 1.61803398875, -0.61803398875 ) ; glVertex3d ( -1.0, 1.0, -1.0 ) ; - glEnd () ; - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( -0.525731112119, -0.850650808354, 0.0 ) ; glVertex3d ( -1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( -1.0, -1.0, -1.0 ) ; glVertex3d ( 0.0, -1.61803398875, -0.61803398875 ) ; glVertex3d ( 0.0, -1.61803398875, 0.61803398875 ) ; glVertex3d ( -1.0, -1.0, 1.0 ) ; - glEnd () ; -} -/* - * - */ -void FGAPIENTRY glutSolidDodecahedron( void ) -{ - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidDodecahedron" ); - - /* Magic Numbers: It is possible to create a dodecahedron by attaching two pentagons to each face of - * of a cube. The coordinates of the points are: - * (+-x,0, z); (+-1, 1, 1); (0, z, x ) - * where x = (-1 + sqrt(5))/2, z = (1 + sqrt(5))/2 or - * x = 0.61803398875 and z = 1.61803398875. - */ - glBegin ( GL_POLYGON ) ; - glNormal3d ( 0.0, 0.525731112119, 0.850650808354 ) ; glVertex3d ( 0.0, 1.61803398875, 0.61803398875 ) ; glVertex3d ( -1.0, 1.0, 1.0 ) ; glVertex3d ( -0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( 0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( 1.0, 1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_POLYGON ) ; - glNormal3d ( 0.0, 0.525731112119, -0.850650808354 ) ; glVertex3d ( 0.0, 1.61803398875, -0.61803398875 ) ; glVertex3d ( 1.0, 1.0, -1.0 ) ; glVertex3d ( 0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( -0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( -1.0, 1.0, -1.0 ) ; - glEnd () ; - glBegin ( GL_POLYGON ) ; - glNormal3d ( 0.0, -0.525731112119, 0.850650808354 ) ; glVertex3d ( 0.0, -1.61803398875, 0.61803398875 ) ; glVertex3d ( 1.0, -1.0, 1.0 ) ; glVertex3d ( 0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( -0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( -1.0, -1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_POLYGON ) ; - glNormal3d ( 0.0, -0.525731112119, -0.850650808354 ) ; glVertex3d ( 0.0, -1.61803398875, -0.61803398875 ) ; glVertex3d ( -1.0, -1.0, -1.0 ) ; glVertex3d ( -0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( 0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( 1.0, -1.0, -1.0 ) ; - glEnd () ; - - glBegin ( GL_POLYGON ) ; - glNormal3d ( 0.850650808354, 0.0, 0.525731112119 ) ; glVertex3d ( 0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( 1.0, -1.0, 1.0 ) ; glVertex3d ( 1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( 1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( 1.0, 1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_POLYGON ) ; - glNormal3d ( -0.850650808354, 0.0, 0.525731112119 ) ; glVertex3d ( -0.61803398875, 0.0, 1.61803398875 ) ; glVertex3d ( -1.0, 1.0, 1.0 ) ; glVertex3d ( -1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( -1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( -1.0, -1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_POLYGON ) ; - glNormal3d ( 0.850650808354, 0.0, -0.525731112119 ) ; glVertex3d ( 0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( 1.0, 1.0, -1.0 ) ; glVertex3d ( 1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( 1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( 1.0, -1.0, -1.0 ) ; - glEnd () ; - glBegin ( GL_POLYGON ) ; - glNormal3d ( -0.850650808354, 0.0, -0.525731112119 ) ; glVertex3d ( -0.61803398875, 0.0, -1.61803398875 ) ; glVertex3d ( -1.0, -1.0, -1.0 ) ; glVertex3d ( -1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( -1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( -1.0, 1.0, -1.0 ) ; - glEnd () ; - - glBegin ( GL_POLYGON ) ; - glNormal3d ( 0.525731112119, 0.850650808354, 0.0 ) ; glVertex3d ( 1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( 1.0, 1.0, -1.0 ) ; glVertex3d ( 0.0, 1.61803398875, -0.61803398875 ) ; glVertex3d ( 0.0, 1.61803398875, 0.61803398875 ) ; glVertex3d ( 1.0, 1.0, 1.0 ) ; - glEnd () ; - glBegin ( GL_POLYGON ) ; - glNormal3d ( 0.525731112119, -0.850650808354, 0.0 ) ; glVertex3d ( 1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( 1.0, -1.0, 1.0 ) ; glVertex3d ( 0.0, -1.61803398875, 0.61803398875 ) ; glVertex3d ( 0.0, -1.61803398875, -0.61803398875 ) ; glVertex3d ( 1.0, -1.0, -1.0 ) ; - glEnd () ; - glBegin ( GL_POLYGON ) ; - glNormal3d ( -0.525731112119, 0.850650808354, 0.0 ) ; glVertex3d ( -1.61803398875, 0.61803398875, 0.0 ) ; glVertex3d ( -1.0, 1.0, 1.0 ) ; glVertex3d ( 0.0, 1.61803398875, 0.61803398875 ) ; glVertex3d ( 0.0, 1.61803398875, -0.61803398875 ) ; glVertex3d ( -1.0, 1.0, -1.0 ) ; - glEnd () ; - glBegin ( GL_POLYGON ) ; - glNormal3d ( -0.525731112119, -0.850650808354, 0.0 ) ; glVertex3d ( -1.61803398875, -0.61803398875, 0.0 ) ; glVertex3d ( -1.0, -1.0, -1.0 ) ; glVertex3d ( 0.0, -1.61803398875, -0.61803398875 ) ; glVertex3d ( 0.0, -1.61803398875, 0.61803398875 ) ; glVertex3d ( -1.0, -1.0, 1.0 ) ; - glEnd () ; -} -/* - * - */ -void FGAPIENTRY glutWireOctahedron( void ) -{ - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireOctahedron" ); - -#define RADIUS 1.0f - glBegin( GL_LINE_LOOP ); - glNormal3d( 0.577350269189, 0.577350269189, 0.577350269189); glVertex3d( RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, RADIUS, 0.0 ); glVertex3d( 0.0, 0.0, RADIUS ); - glNormal3d( 0.577350269189, 0.577350269189,-0.577350269189); glVertex3d( RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, 0.0,-RADIUS ); glVertex3d( 0.0, RADIUS, 0.0 ); - glNormal3d( 0.577350269189,-0.577350269189, 0.577350269189); glVertex3d( RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, 0.0, RADIUS ); glVertex3d( 0.0,-RADIUS, 0.0 ); - glNormal3d( 0.577350269189,-0.577350269189,-0.577350269189); glVertex3d( RADIUS, 0.0, 0.0 ); glVertex3d( 0.0,-RADIUS, 0.0 ); glVertex3d( 0.0, 0.0,-RADIUS ); - glNormal3d(-0.577350269189, 0.577350269189, 0.577350269189); glVertex3d(-RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, 0.0, RADIUS ); glVertex3d( 0.0, RADIUS, 0.0 ); - glNormal3d(-0.577350269189, 0.577350269189,-0.577350269189); glVertex3d(-RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, RADIUS, 0.0 ); glVertex3d( 0.0, 0.0,-RADIUS ); - glNormal3d(-0.577350269189,-0.577350269189, 0.577350269189); glVertex3d(-RADIUS, 0.0, 0.0 ); glVertex3d( 0.0,-RADIUS, 0.0 ); glVertex3d( 0.0, 0.0, RADIUS ); - glNormal3d(-0.577350269189,-0.577350269189,-0.577350269189); glVertex3d(-RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, 0.0,-RADIUS ); glVertex3d( 0.0,-RADIUS, 0.0 ); - glEnd(); -#undef RADIUS -} - -/* - * - */ -void FGAPIENTRY glutSolidOctahedron( void ) -{ - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidOctahedron" ); - -#define RADIUS 1.0f - glBegin( GL_TRIANGLES ); - glNormal3d( 0.577350269189, 0.577350269189, 0.577350269189); glVertex3d( RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, RADIUS, 0.0 ); glVertex3d( 0.0, 0.0, RADIUS ); - glNormal3d( 0.577350269189, 0.577350269189,-0.577350269189); glVertex3d( RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, 0.0,-RADIUS ); glVertex3d( 0.0, RADIUS, 0.0 ); - glNormal3d( 0.577350269189,-0.577350269189, 0.577350269189); glVertex3d( RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, 0.0, RADIUS ); glVertex3d( 0.0,-RADIUS, 0.0 ); - glNormal3d( 0.577350269189,-0.577350269189,-0.577350269189); glVertex3d( RADIUS, 0.0, 0.0 ); glVertex3d( 0.0,-RADIUS, 0.0 ); glVertex3d( 0.0, 0.0,-RADIUS ); - glNormal3d(-0.577350269189, 0.577350269189, 0.577350269189); glVertex3d(-RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, 0.0, RADIUS ); glVertex3d( 0.0, RADIUS, 0.0 ); - glNormal3d(-0.577350269189, 0.577350269189,-0.577350269189); glVertex3d(-RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, RADIUS, 0.0 ); glVertex3d( 0.0, 0.0,-RADIUS ); - glNormal3d(-0.577350269189,-0.577350269189, 0.577350269189); glVertex3d(-RADIUS, 0.0, 0.0 ); glVertex3d( 0.0,-RADIUS, 0.0 ); glVertex3d( 0.0, 0.0, RADIUS ); - glNormal3d(-0.577350269189,-0.577350269189,-0.577350269189); glVertex3d(-RADIUS, 0.0, 0.0 ); glVertex3d( 0.0, 0.0,-RADIUS ); glVertex3d( 0.0,-RADIUS, 0.0 ); - glEnd(); -#undef RADIUS -} - -/* - * - */ -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 () ; - } -} +/* -- INTERFACE FUNCTIONS -------------------------------------------------- */ +/* 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 glutSolidIcosahedron( void ) +void FGAPIENTRY glutWireCube( GLdouble dSize ) { - 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 () ; + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireCube" ); + fghCube( dSize, TRUE ); } - -/* - * - */ -static double rdod_r[14][3] = { - { 0.0, 0.0, 1.0 }, - { 0.707106781187, 0.000000000000, 0.5 }, - { 0.000000000000, 0.707106781187, 0.5 }, - { -0.707106781187, 0.000000000000, 0.5 }, - { 0.000000000000, -0.707106781187, 0.5 }, - { 0.707106781187, 0.707106781187, 0.0 }, - { -0.707106781187, 0.707106781187, 0.0 }, - { -0.707106781187, -0.707106781187, 0.0 }, - { 0.707106781187, -0.707106781187, 0.0 }, - { 0.707106781187, 0.000000000000, -0.5 }, - { 0.000000000000, 0.707106781187, -0.5 }, - { -0.707106781187, 0.000000000000, -0.5 }, - { 0.000000000000, -0.707106781187, -0.5 }, - { 0.0, 0.0, -1.0 } -} ; - -static int rdod_v [12][4] = { - { 0, 1, 5, 2 }, - { 0, 2, 6, 3 }, - { 0, 3, 7, 4 }, - { 0, 4, 8, 1 }, - { 5, 10, 6, 2 }, - { 6, 11, 7, 3 }, - { 7, 12, 8, 4 }, - { 8, 9, 5, 1 }, - { 5, 9, 13, 10 }, - { 6, 10, 13, 11 }, - { 7, 11, 13, 12 }, - { 8, 12, 13, 9 } -}; - -static double rdod_n[12][3] = { - { 0.353553390594, 0.353553390594, 0.5 }, - { -0.353553390594, 0.353553390594, 0.5 }, - { -0.353553390594, -0.353553390594, 0.5 }, - { 0.353553390594, -0.353553390594, 0.5 }, - { 0.000000000000, 1.000000000000, 0.0 }, - { -1.000000000000, 0.000000000000, 0.0 }, - { 0.000000000000, -1.000000000000, 0.0 }, - { 1.000000000000, 0.000000000000, 0.0 }, - { 0.353553390594, 0.353553390594, -0.5 }, - { -0.353553390594, 0.353553390594, -0.5 }, - { -0.353553390594, -0.353553390594, -0.5 }, - { 0.353553390594, -0.353553390594, -0.5 } -}; - -void FGAPIENTRY glutWireRhombicDodecahedron( void ) +void FGAPIENTRY glutSolidCube( GLdouble dSize ) { - int i ; - - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireRhombicDodecahedron" ); - - for ( i = 0; i < 12; i++ ) - { - glBegin ( GL_LINE_LOOP ) ; - glNormal3dv ( rdod_n[i] ) ; - glVertex3dv ( rdod_r[rdod_v[i][0]] ) ; - glVertex3dv ( rdod_r[rdod_v[i][1]] ) ; - glVertex3dv ( rdod_r[rdod_v[i][2]] ) ; - glVertex3dv ( rdod_r[rdod_v[i][3]] ) ; - glEnd () ; - } + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidCube" ); + fghCube( dSize, FALSE ); } -/* - * - */ -void FGAPIENTRY glutSolidRhombicDodecahedron( void ) -{ - int i ; - - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidRhombicDodecahedron" ); - - glBegin ( GL_QUADS ) ; - for ( i = 0; i < 12; i++ ) - { - glNormal3dv ( rdod_n[i] ) ; - glVertex3dv ( rdod_r[rdod_v[i][0]] ) ; - glVertex3dv ( rdod_r[rdod_v[i][1]] ) ; - glVertex3dv ( rdod_r[rdod_v[i][2]] ) ; - glVertex3dv ( rdod_r[rdod_v[i][3]] ) ; - } - - glEnd () ; -} +DECLARE_SHAPE_INTERFACE(Dodecahedron); +DECLARE_SHAPE_INTERFACE(Icosahedron); +DECLARE_SHAPE_INTERFACE(Octahedron); +DECLARE_SHAPE_INTERFACE(RhombicDodecahedron); void FGAPIENTRY glutWireSierpinskiSponge ( int num_levels, GLdouble offset[3], GLdouble scale ) { - int i, j ; - - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireSierpinskiSponge" ); - - if ( num_levels == 0 ) - { - - for ( i = 0 ; i < TETR_NUM_FACES ; i++ ) - { - glBegin ( GL_LINE_LOOP ) ; - glNormal3d ( -tet_r[i][0], -tet_r[i][1], -tet_r[i][2] ) ; - for ( j = 0; j < 3; j++ ) - { - double x = offset[0] + scale * tet_r[tet_i[i][j]][0] ; - double y = offset[1] + scale * tet_r[tet_i[i][j]][1] ; - double z = offset[2] + scale * tet_r[tet_i[i][j]][2] ; - glVertex3d ( x, y, z ) ; - } - - glEnd () ; - } - } - else if ( num_levels > 0 ) - { - GLdouble local_offset[3] ; /* Use a local variable to avoid buildup of roundoff errors */ - num_levels -- ; - scale /= 2.0 ; - for ( i = 0 ; i < TETR_NUM_FACES ; i++ ) - { - local_offset[0] = offset[0] + scale * tet_r[i][0] ; - local_offset[1] = offset[1] + scale * tet_r[i][1] ; - local_offset[2] = offset[2] + scale * tet_r[i][2] ; - glutWireSierpinskiSponge ( num_levels, local_offset, scale ) ; - } - } + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireSierpinskiSponge" ); + fghSierpinskiSponge ( num_levels, offset, scale, TRUE ); } - void FGAPIENTRY glutSolidSierpinskiSponge ( int num_levels, GLdouble offset[3], GLdouble scale ) { - int i, j ; - - FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidSierpinskiSponge" ); - - if ( num_levels == 0 ) - { - glBegin ( GL_TRIANGLES ) ; - - for ( i = 0 ; i < TETR_NUM_FACES ; i++ ) - { - glNormal3d ( -tet_r[i][0], -tet_r[i][1], -tet_r[i][2] ) ; - for ( j = 0; j < 3; j++ ) - { - double x = offset[0] + scale * tet_r[tet_i[i][j]][0] ; - double y = offset[1] + scale * tet_r[tet_i[i][j]][1] ; - double z = offset[2] + scale * tet_r[tet_i[i][j]][2] ; - glVertex3d ( x, y, z ) ; - } - } - - glEnd () ; - } - else if ( num_levels > 0 ) - { - GLdouble local_offset[3] ; /* Use a local variable to avoid buildup of roundoff errors */ - num_levels -- ; - scale /= 2.0 ; - for ( i = 0 ; i < TETR_NUM_FACES ; i++ ) - { - local_offset[0] = offset[0] + scale * tet_r[i][0] ; - local_offset[1] = offset[1] + scale * tet_r[i][1] ; - local_offset[2] = offset[2] + scale * tet_r[i][2] ; - glutSolidSierpinskiSponge ( num_levels, local_offset, scale ) ; - } - } + FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidSierpinskiSponge" ); + fghSierpinskiSponge ( num_levels, offset, scale, FALSE ); } - - -/* -- INTERFACE FUNCTIONS -------------------------------------------------- */ - - -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 ***/