hwSphere - create a partial sphere of a given radius

NAME

INHERITS FROM

PROPERTIES

GraphN	1I	Tesselation parameter; the number of rows in the resulting mesh
GraphM	1I	Tesselation parameter; the number of columns in the resulting mesh
Radius	1F	The radius of the sphere
LatRange	2F	The range of latitudes covered by the partial sphere, from -90 to 90
LonRange	2F	The range of longitudes covered by the partial sphere, from 0 to 360
OptFlags	1I	The optimization flags; see hw for details
HasNormals	1B	True if smooth shading is desired; false for a faceted appearance
Resolution	1F	Tesselation multiplier

DEFAULTS

GraphN	9
GraphM	17
Radius	1.0
LatRange	{-90,90}
LonRange	{0,360}
OptFlags	hwDefaultOptFlags
HasNormals	True
Resolution	1.0

DESCRIPTION

The hwSphere class creates a partial sphere object with specified radius, latitude range, and longitude range. GraphN and GraphM correspond the the numbers of rows and columns in the mesh resulting from tesselation of the sphere. Note that for full spheres, the tesselation might not be a trivial latitude-longitude mesh. By default, the sphere has a smoothly shaded appearance; if a faceted appearance is desired instead, set the HasNormals property to False.

The default texture coordinates have the S coordinate increasing from 0 to 1 along the longitudes of the sphere, and the T coordinate increasing from 0 to 1 along the latitudes of the sphere.

C EXAMPLE

    /* Draw a bowl */
    hwObject
        sphere;

    sphere = hwSphere->create( hwSphere );
    HW_MODIFY_1B( sphere, hwStrTwoSided, HW_TRUE );
    HW_MODIFY_2F( sphere, hwStrLatRange, -90.0, -45.0 );
    sphere->draw( sphere );
    sphere->destroy( sphere );

OBJECT FILE EXAMPLE

    # A bowl-shaped object
    hwSphere sphere {
        TwoSided = True
        LatRange = {-90, -45}
    }