Geometric Object Rendering

Geometric Object Rendering — Functions for generating easily recognizable 3D geometric objects

Synopsis


#include <gdk/gdkgl.h>


void        gdk_gl_draw_cube                (gboolean solid,
                                             double size);
void        gdk_gl_draw_sphere              (gboolean solid,
                                             double radius,
                                             int slices,
                                             int stacks);
void        gdk_gl_draw_cone                (gboolean solid,
                                             double base,
                                             double height,
                                             int slices,
                                             int stacks);
void        gdk_gl_draw_torus               (gboolean solid,
                                             double inner_radius,
                                             double outer_radius,
                                             int nsides,
                                             int rings);
void        gdk_gl_draw_tetrahedron         (gboolean solid);
void        gdk_gl_draw_octahedron          (gboolean solid);
void        gdk_gl_draw_dodecahedron        (gboolean solid);
void        gdk_gl_draw_icosahedron         (gboolean solid);
void        gdk_gl_draw_teapot              (gboolean solid,
                                             double scale);

Description

Details

gdk_gl_draw_cube ()

void        gdk_gl_draw_cube                (gboolean solid,
                                             double size);

Renders a cube. The cube is centered at the modeling coordinates origin with sides of length size.

`solid` :	TRUE if the cube should be solid.
`size` :	length of cube sides.

gdk_gl_draw_sphere ()

void        gdk_gl_draw_sphere              (gboolean solid,
                                             double radius,
                                             int slices,
                                             int stacks);

Renders a sphere centered at the modeling coordinates origin of the specified radius. The sphere is subdivided around the Z axis into slices and along the Z axis into stacks.

`solid` :	TRUE if the sphere should be solid.
`radius` :	the radius of the sphere.
`slices` :	the number of subdivisions around the Z axis (similar to lines of longitude).
`stacks` :	the number of subdivisions along the Z axis (similar to lines of latitude).

gdk_gl_draw_cone ()

void        gdk_gl_draw_cone                (gboolean solid,
                                             double base,
                                             double height,
                                             int slices,
                                             int stacks);

Renders a cone oriented along the Z axis. The base of the cone is placed at Z = 0, and the top at Z = height. The cone is subdivided around the Z axis into slices, and along the Z axis into stacks.

`solid` :	TRUE if the cone should be solid.
`base` :	the radius of the base of the cone.
`height` :	the height of the cone.
`slices` :	the number of subdivisions around the Z axis.
`stacks` :	the number of subdivisions along the Z axis.

gdk_gl_draw_torus ()

void        gdk_gl_draw_torus               (gboolean solid,
                                             double inner_radius,
                                             double outer_radius,
                                             int nsides,
                                             int rings);

Renders a torus (doughnut) centered at the modeling coordinates origin whose axis is aligned with the Z axis.

`solid` :	TRUE if the torus should be solid.
`inner_radius` :	inner radius of the torus.
`outer_radius` :	outer radius of the torus.
`nsides` :	number of sides for each radial section.
`rings` :	number of radial divisions for the torus.

gdk_gl_draw_tetrahedron ()

void        gdk_gl_draw_tetrahedron         (gboolean solid);

Renders a tetrahedron centered at the modeling coordinates origin with a radius of the square root of 3.

solid : TRUE if the tetrahedron should be solid.

gdk_gl_draw_octahedron ()

void        gdk_gl_draw_octahedron          (gboolean solid);

Renders a octahedron centered at the modeling coordinates origin with a radius of 1.0.

solid : TRUE if the octahedron should be solid.

gdk_gl_draw_dodecahedron ()

void        gdk_gl_draw_dodecahedron        (gboolean solid);

Renders a dodecahedron centered at the modeling coordinates origin with a radius of the square root of 3.

solid : TRUE if the dodecahedron should be solid.

gdk_gl_draw_icosahedron ()

void        gdk_gl_draw_icosahedron         (gboolean solid);

Renders a icosahedron. The icosahedron is centered at the modeling coordinates origin and has a radius of 1.0.

solid : TRUE if the icosahedron should be solid.

gdk_gl_draw_teapot ()

void        gdk_gl_draw_teapot              (gboolean solid,
                                             double scale);

Renders a teapot. Both surface normals and texture coordinates for the teapot are generated. The teapot is generated with OpenGL evaluators.

`solid` :	TRUE if the teapot should be solid.
`scale` :	relative size of the teapot.