SilverScreenAPI

ROUND_NODE

Structure

A primitive-level data type that stores the data associated with a SilverScreen circle, arc, or ellipse.

struct ROUND_NODE : PRIM_NODE

{

SS_XYZ horizontal;

SS_XYZ vertical;

double start_angle;

double stop_angle;

SURFACE_NODE *sn;

RGB surface_rgb;

RGB round_rgb;

int surface_pattern_number;

USINT round_width_style;

VERTEX center;

int round_type;

TEXTURE_DATA *texture;

} ;

Members

Member	Description
horizontal	Displacement from the center indicating the horizontal direction of the circle, ellipse, or arc
vertical	Displacement from the center indicating the vertical direction of the circle, ellipse, or arc
start_angle	When the primitive is an arc or elliptical arc, this stores the start angle in radians.
stop_angle	When the primitive is an arc or elliptical arc, this stores the stop angle in radians.
sn	A SURFACE_NODE pointer, that if not NULL, stores the surface properties for rendering this primitive. When this member is NULL, then the surface properties from the parent OBJECT_NODE will be used to render this primitive.
surface_rgb	The fill color for closed circles and ellipses
round_rgb	The edge color for circles, ellipses, and arcs.
surface_pattern_number	The surface pattern index for closed circles and ellipses, or 0 if there is none.
round_width_style	The edge width and style index for the circle, ellipse, or arc.
center	A VERTEX number from the OBJECT_NODE that contains the circle, ellipse, or arc and which stores the center-point of the primitive.
round_type	A value that is 1 if the primitive is a circle or ellipse, and 2 if the primitive is an arc or elliptical arc.
texture	A TEXTURE_DATA pointer, that if not NULL, stores the texture properties for rendering this primitive. When this member is NULL, then the texture properties from the parent OBJECT_NODE will be used to render this primitive.

Remarks

A ROUND_NODE is a PRIM_NODE that has the BITS_CIRCLE or BITS_ARC flag enabled in 'bits'.To determine if a ROUND_NODE is a circle or ellipse, check for the presence of BITS_CIRCLE on 'bits' or a value of 1 for 'round_type'.

To determine if a ROUND_NODE is closed, check for the presence of BITS_CLOSED on 'bits' or a value of 2 for 'round_type'. To determine if a ROUND_NODE is an arc or elliptical arc, check for the presence of BITS_ARC on 'bits'.

silver.h, ssnodes.h

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