hwSurfRev - create a shape specified by revolving a path about the Z axis

NAME

INHERITS FROM

PROPERTIES

GraphN	1I	The number of rows in the resulting mesh
Data	*F	The 2-dimensional path to be rotated around the Z axis
LonRange	2F	The starting and ending points of the rotation, in degrees from 0 to 360
OptFlags	1I	Optimization flags; see hw for details
HasNormals	1B	True for smooth shading; false for faceted appearance
Resolution	1F	Tesselation multiplier

DEFAULTS

GraphN	9
LonRange	{0,360}
OptFlags	hwDefaultOptFlags
HasNormals	True
Resolution	1.0

DESCRIPTION

The hwSurfRev class creates a surface of revolution based on a 2-dimensional path. The path consists of radius, height pairs. The radius is the distance of this point on the path from the Z axis. The height is the distance of the point above the XY plane. This path is revolved about the Z axis, starting at LonRange[0] degrees, and going to LonRange[1] degrees. By default, this surface is smoothly shaded; set HasNormals to False if you want a faceted appearance.

The default texture coordinates for a surface of revolution have the S coordinate increasing from 0.0 to 1.0 around the arc, and T increasing from 0.0 to 1.0 from minimum Z to maximum Z.

C EXAMPLE

    /* Draw a surface of revolution */
    hwObject
        surfRev;
    hwFloat
        points[] = {1,0, 0.5,1, 1,2};

    surfRev = hwSurfRev->create( hwSurfRev );
    surfRev->modify( surfRev, hwStrData,
                        HW_MAKE_TYPE(HW_TYPE_FLOAT,6), points );
    HW_MODIFY_1B( surfRev, hwStrTwoSided, HW_TRUE );
    surfRev->draw( surfRev );
    surfRev->destroy( surfRev );

OBJECT FILE EXAMPLE

    # A simple surface of revolution
    hwSurfRev surfRev {
        Data = {1,0, 0.5,1, 1,2}
        TwoSided = True
    }