C481 B581 Computer Graphics
Dana Vrajitoru
Complex Geometrical Objects in OpenGL
Quadric Objects in GLU
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Quadric: geometrical form defined by equations in x, y, and z, of degree
<
2.
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x2 + y2 + z2 = 4
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In GLU, one must declare such an object and define its rendering mode.
GLUquadricObj *obj = gluNewQuadric();
gluQuadricDrawStyle(obj, GLU_LINE);
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The style can be GLU_FILL , GLU_LINE , GLU_POINT or GLU_SILHOUETTE.
Quadric Primitives
void gluSphere( GLUquadricObj *quadobj, GLdouble radius, GLint
slices, GLint stacks );
void gluCylinder( GLUquadricObj *quadobj, GLdouble baseRadius,
GLdouble topRadius, GLdouble height, GLint slices, GLint stacks );
void gluDisk( GLUquadricObj *quadobj, GLdouble innerRadius, GLdouble
outerRadius, GLint slices, GLint loops );
void gluPartialDisk( GLUquadricObj *quadobj, GLdouble innerRadius,
GLdouble outerRadius, GLint slices, GLint loops, GLdouble startAngle, GLdouble
sweepAngle );
A cylinder and a disk.
Complex Objects in GLUT
glutSolidSphere(radius, slices, stacks);
glutWireSphere(...);
The objects can be Cube, Cone, Torus, Dodecahedron, Octahedron, Tetrahedron,
Icosahedron, Teapot,
Documentation for each of them can be found at
http://www.openGL.org/
The teapot and a dodecaedron