* useWireMode controls the drawing of solids (false) or wire frame
* versions (TRUE) of the geometry you pass
*/
-static void fghDrawGeometry(GLenum vertexMode, double* vertices, double* normals, GLsizei numVertices, GLboolean useWireMode)
+static void fghDrawGeometry(GLenum vertexMode, GLdouble* vertices, GLdouble* normals, GLsizei numVertices, GLboolean useWireMode)
{
if (useWireMode)
{
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
}
- glEnableClientState(GL_VERTEX_ARRAY);
- glEnableClientState(GL_NORMAL_ARRAY);
+ if (1)
+ {
+ glEnableClientState(GL_VERTEX_ARRAY);
+ glEnableClientState(GL_NORMAL_ARRAY);
- glVertexPointer(3, GL_DOUBLE, 0, vertices);
- glNormalPointer(GL_DOUBLE, 0, normals);
- glDrawArrays(vertexMode,0,numVertices);
+ glVertexPointer(3, GL_DOUBLE, 0, vertices);
+ glNormalPointer(GL_DOUBLE, 0, normals);
+ glDrawArrays(vertexMode, 0, numVertices);
- glDisableClientState(GL_VERTEX_ARRAY);
- glDisableClientState(GL_NORMAL_ARRAY);
+ glDisableClientState(GL_VERTEX_ARRAY);
+ glDisableClientState(GL_NORMAL_ARRAY);
+ }
+ else
+ {
+ int i;
+ glBegin(vertexMode);
+ for(i=0; i<numVertices; i++)
+ {
+ glNormal3dv(normals+i*3);
+ printf("n(%i) = (%1.4f,%1.4f,%1.4f)\n",i,*(normals+i*3),*(normals+i*3+1),*(normals+i*3+2));
+ glVertex3dv(vertices+i*3);
+ printf("v(%i) = (%1.4f,%1.4f,%1.4f)\n",i,*(vertices+i*3),*(vertices+i*3+1),*(vertices+i*3+2));
+ }
+ glEnd();
+ }
if (useWireMode)
{
}
/* -- stuff that can be cached -- */
+/* Cache of input to glDrawArrays */
+#define DECLARE_SHAPE_CACHE(name,nameICaps,nameCaps)\
+ static GLboolean name##Cached = FALSE;\
+ static GLdouble name##_verts[nameCaps##_VERT_ELEM_PER_OBJ];\
+ static GLdouble name##_norms[nameCaps##_VERT_ELEM_PER_OBJ];\
+ static void fgh##nameICaps##Generate()\
+ {\
+ fghGenerateGeometry(nameCaps##_NUM_FACES, nameCaps##_NUM_VERT_PER_FACE,\
+ name##_v, name##_vi, name##_n,\
+ name##_verts, name##_norms);\
+ }
/*
* In general, we build arrays with all vertices or normals.
* We cant compress this and use glDrawElements as all combinations of
#define CUBE_NUM_VERT 8
#define CUBE_NUM_FACES 6
#define CUBE_NUM_VERT_PER_FACE 4
-#define CUBE_VERT_PER_TETR CUBE_NUM_FACES*CUBE_NUM_VERT_PER_FACE
-#define CUBE_VERT_ELEM_PER_TETR CUBE_VERT_PER_TETR*3
+#define CUBE_VERT_PER_OBJ CUBE_NUM_FACES*CUBE_NUM_VERT_PER_FACE
+#define CUBE_VERT_ELEM_PER_OBJ CUBE_VERT_PER_OBJ*3
/* Vertex Coordinates */
static GLdouble cube_v[CUBE_NUM_VERT*3] =
{
};
/* Vertex indices */
-static GLubyte cube_vi[CUBE_NUM_FACES*CUBE_NUM_VERT_PER_FACE] =
+static GLubyte cube_vi[CUBE_VERT_PER_OBJ] =
{
0,1,2,3,
0,3,4,5,
7,4,3,2,
4,7,6,5
};
+DECLARE_SHAPE_CACHE(cube,Cube,CUBE);
-/* Cache of input to glDrawArrays */
-static GLboolean cubeCached = FALSE;
-static double cube_verts[CUBE_VERT_ELEM_PER_TETR];
-static double cube_norms[CUBE_VERT_ELEM_PER_TETR];
+/* -- Octahedron -- */
+#define OCTAHEDRON_NUM_VERT 6
+#define OCTAHEDRON_NUM_FACES 8
+#define OCTAHEDRON_NUM_VERT_PER_FACE 3
+#define OCTAHEDRON_VERT_PER_OBJ OCTAHEDRON_NUM_FACES*OCTAHEDRON_NUM_VERT_PER_FACE
+#define OCTAHEDRON_VERT_ELEM_PER_OBJ OCTAHEDRON_VERT_PER_OBJ*3
-static void fghCubeGenerate()
+/* Vertex Coordinates */
+static GLdouble octahedron_v[OCTAHEDRON_NUM_VERT*3] =
{
- fghGenerateGeometry(CUBE_NUM_FACES, CUBE_NUM_VERT_PER_FACE, cube_v, cube_vi, cube_n, cube_verts, cube_norms);
-}
+ 1., 0., 0.,
+ 0., 1., 0.,
+ 0., 0., 1.,
+ -1., 0., 0.,
+ 0., -1., 0.,
+ 0., 0., -1.,
+
+};
+/* Normal Vectors */
+static GLdouble octahedron_n[OCTAHEDRON_NUM_FACES*3] =
+{
+ 0.577350269189, 0.577350269189, 0.577350269189, /* sqrt(1/3) */
+ 0.577350269189, 0.577350269189,-0.577350269189,
+ 0.577350269189,-0.577350269189, 0.577350269189,
+ 0.577350269189,-0.577350269189,-0.577350269189,
+ -0.577350269189, 0.577350269189, 0.577350269189,
+ -0.577350269189, 0.577350269189,-0.577350269189,
+ -0.577350269189,-0.577350269189, 0.577350269189,
+ -0.577350269189,-0.577350269189,-0.577350269189
+
+};
+
+/* Vertex indices */
+static GLubyte octahedron_vi[OCTAHEDRON_VERT_PER_OBJ] =
+{
+ 0, 1, 2,
+ 0, 5, 1,
+ 0, 2, 4,
+ 0, 4, 5,
+ 3, 2, 1,
+ 3, 1, 5,
+ 3, 4, 2,
+ 3, 5, 4
+};
+DECLARE_SHAPE_CACHE(octahedron,Octahedron,OCTAHEDRON);
/* -- Tetrahedron -- */
/* Magic Numbers: r0 = ( 1, 0, 0 )
*
* Normals: The unit normals are simply the negative of the coordinates of the point not on the surface.
*/
-#define TETR_NUM_VERT 4
-#define TETR_NUM_FACES 4
-#define TETR_NUM_VERT_PER_FACE 3
-#define TETR_VERT_PER_TETR TETR_NUM_FACES*TETR_NUM_VERT_PER_FACE
-#define TETR_VERT_ELEM_PER_TETR TETR_VERT_PER_TETR*3
+#define TETRAHEDRON_NUM_VERT 4
+#define TETRAHEDRON_NUM_FACES 4
+#define TETRAHEDRON_NUM_VERT_PER_FACE 3
+#define TETRAHEDRON_VERT_PER_OBJ TETRAHEDRON_NUM_FACES*TETRAHEDRON_NUM_VERT_PER_FACE
+#define TETRAHEDRON_VERT_ELEM_PER_OBJ TETRAHEDRON_VERT_PER_OBJ*3
/* Vertex Coordinates */
-static GLdouble tetr_v[TETR_NUM_VERT*3] =
+static GLdouble tetrahedron_v[TETRAHEDRON_NUM_VERT*3] =
{
1.0, 0.0, 0.0,
-0.333333333333, 0.942809041582, 0.0,
-0.333333333333, -0.471404520791, -0.816496580928
};
/* Normal Vectors */
-static GLdouble tetr_n[CUBE_NUM_FACES*3] =
+static GLdouble tetrahedron_n[TETRAHEDRON_NUM_FACES*3] =
{
- 1.0, 0.0, 0.0,
0.333333333333, -0.942809041582, 0.0,
};
/* Vertex indices */
-static GLubyte tetr_vi[TETR_NUM_FACES*TETR_NUM_VERT_PER_FACE] =
+static GLubyte tetrahedron_vi[TETRAHEDRON_VERT_PER_OBJ] =
{
1, 3, 2,
0, 2, 3,
0, 3, 1,
0, 1, 2
};
-
-/* Cache of input to glDrawArrays */
-static GLboolean tetrCached = FALSE;
-static double tetr_verts[TETR_VERT_ELEM_PER_TETR];
-static double tetr_norms[TETR_VERT_ELEM_PER_TETR];
-
-static void fghTetrahedronGenerate()
-{
- fghGenerateGeometry(TETR_NUM_FACES, TETR_NUM_VERT_PER_FACE, tetr_v, tetr_vi, tetr_n, tetr_verts, tetr_norms);
-}
+DECLARE_SHAPE_CACHE(tetrahedron,Tetrahedron,TETRAHEDRON);
/* -- Sierpinski Sponge -- */
-static void fghSierpinskiSpongeGenerate ( int numLevels, GLdouble offset[3], GLdouble scale, double* vertices, double* normals )
+static void fghSierpinskiSpongeGenerate ( int numLevels, GLdouble offset[3], GLdouble scale, GLdouble* vertices, GLdouble* normals )
{
int i, j;
if ( numLevels == 0 )
{
- for (i=0; i<TETR_NUM_FACES; i++)
+ for (i=0; i<TETRAHEDRON_NUM_FACES; i++)
{
int normIdx = i*3;
- int faceIdxVertIdx = i*TETR_NUM_VERT_PER_FACE;
- for (j=0; j<TETR_NUM_VERT_PER_FACE; j++)
+ int faceIdxVertIdx = i*TETRAHEDRON_NUM_VERT_PER_FACE;
+ for (j=0; j<TETRAHEDRON_NUM_VERT_PER_FACE; j++)
{
- int outIdx = i*TETR_NUM_VERT_PER_FACE*3+j*3;
- int vertIdx = tetr_vi[faceIdxVertIdx+j]*3;
+ int outIdx = i*TETRAHEDRON_NUM_VERT_PER_FACE*3+j*3;
+ int vertIdx = tetrahedron_vi[faceIdxVertIdx+j]*3;
- vertices[outIdx ] = offset[0] + scale * tetr_v[vertIdx ];
- vertices[outIdx+1] = offset[1] + scale * tetr_v[vertIdx+1];
- vertices[outIdx+2] = offset[2] + scale * tetr_v[vertIdx+2];
+ vertices[outIdx ] = offset[0] + scale * tetrahedron_v[vertIdx ];
+ vertices[outIdx+1] = offset[1] + scale * tetrahedron_v[vertIdx+1];
+ vertices[outIdx+2] = offset[2] + scale * tetrahedron_v[vertIdx+2];
- normals [outIdx ] = tetr_n[normIdx ];
- normals [outIdx+1] = tetr_n[normIdx+1];
- normals [outIdx+2] = tetr_n[normIdx+2];
+ normals [outIdx ] = tetrahedron_n[normIdx ];
+ normals [outIdx+1] = tetrahedron_n[normIdx+1];
+ normals [outIdx+2] = tetrahedron_n[normIdx+2];
}
}
}
else if ( numLevels > 0 )
{
GLdouble local_offset[3] ; /* Use a local variable to avoid buildup of roundoff errors */
- unsigned int stride = ipow(4,--numLevels)*TETR_VERT_ELEM_PER_TETR;
+ unsigned int stride = ipow(4,--numLevels)*TETRAHEDRON_VERT_ELEM_PER_OBJ;
scale /= 2.0 ;
- for ( i = 0 ; i < TETR_NUM_FACES ; i++ )
+ for ( i = 0 ; i < TETRAHEDRON_NUM_FACES ; i++ )
{
int idx = i*3;
- local_offset[0] = offset[0] + scale * tetr_v[idx ];
- local_offset[1] = offset[1] + scale * tetr_v[idx+1];
- local_offset[2] = offset[2] + scale * tetr_v[idx+2];
+ 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 );
}
}
/* -- INTERNAL DRAWING functions to avoid code duplication ------------- */
+#define DECLARE_INTERNAL_DRAW(name,nameICaps,nameCaps)\
+ static void fgh##nameICaps( GLboolean useWireMode )\
+ {\
+ if (!name##Cached)\
+ {\
+ fgh##nameICaps##Generate();\
+ name##Cached = TRUE;\
+ }\
+ fghDrawGeometry(GL_TRIANGLES,name##_verts,name##_norms,nameCaps##_VERT_PER_OBJ,useWireMode);\
+ }
static void fghCube( GLdouble dSize, GLboolean useWireMode )
{
if (dSize!=1.)
{
- /* Need to build new */
- fghDrawGeometry(GL_QUADS,cube_verts,cube_norms,CUBE_VERT_PER_TETR,useWireMode);
- }
- else
- fghDrawGeometry(GL_QUADS,cube_verts,cube_norms,CUBE_VERT_PER_TETR,useWireMode);
-}
+ int i;
-static void fghTetrahedron( GLboolean useWireMode )
-{
- if (!tetrCached)
- {
- fghTetrahedronGenerate();
- tetrCached = TRUE;
- }
+ /* Need to build new vertex list containing vertices for cube of different size */
+ GLdouble *vertices = malloc(CUBE_VERT_ELEM_PER_OBJ * sizeof(GLdouble));
+ for (i=0; i<CUBE_VERT_ELEM_PER_OBJ; i++)
+ vertices[i] = dSize*cube_verts[i];
- fghDrawGeometry(GL_TRIANGLES,tetr_verts,tetr_norms,TETR_VERT_PER_TETR,useWireMode);
+ fghDrawGeometry(GL_QUADS,vertices ,cube_norms,CUBE_VERT_PER_OBJ,useWireMode);
+ }
+ else
+ fghDrawGeometry(GL_QUADS,cube_verts,cube_norms,CUBE_VERT_PER_OBJ,useWireMode);
}
+DECLARE_INTERNAL_DRAW(octahedron,Octahedron,OCTAHEDRON);
+DECLARE_INTERNAL_DRAW(tetrahedron,Tetrahedron,TETRAHEDRON);
static void fghSierpinskiSponge ( int numLevels, GLdouble offset[3], GLdouble scale, GLboolean useWireMode )
{
- double *vertices;
- double * normals;
- unsigned int numTetr = numLevels<0? 0 : ipow(4,numLevels); /* No sponge for numLevels below 0 */
- unsigned int numVert = numTetr*TETR_VERT_PER_TETR;
+ 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;
if (numTetr)
{
/* Allocate memory */
- vertices = malloc(numVert*3 * sizeof(double));
- normals = malloc(numVert*3 * sizeof(double));
+ vertices = malloc(numVert*3 * sizeof(GLdouble));
+ normals = malloc(numVert*3 * sizeof(GLdouble));
/* Generate elements */
fghSierpinskiSpongeGenerate ( numLevels, offset, scale, vertices, normals );
/*
*
*/
-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 },
fghCube( dSize, FALSE );
}
-void FGAPIENTRY glutWireTetrahedron( void )
+void FGAPIENTRY glutWireOctahedron( void )
{
- FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireTetrahedron" );
- fghTetrahedron( TRUE );
+ FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireOctahedron" );
+ fghOctahedron( TRUE );
}
-void FGAPIENTRY glutSolidTetrahedron( void )
+void FGAPIENTRY glutSolidOctahedron( void )
{
- FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidTetrahedron" );
- fghTetrahedron( FALSE );
+ FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidOctahedron" );
+ fghOctahedron( FALSE );
}
void FGAPIENTRY glutWireSierpinskiSponge ( int num_levels, GLdouble offset[3], GLdouble scale )
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 );
+}
+
/*** END OF FILE ***/
projects / freeglut / blobdiff