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sds_grdraw

int sds_grdraw (const sds_point point1, const sds_point point2, int color, int mode);


Draw a vector, this way.


This function draws a vector in the graphics window, from point1 to point2. The vector can be displayed in any of the standard colors and can be highlighted or displayed normally.

The arguments point1 and point2 represent the first and second points for the vector.

The argument color is the color number for the vector. This can be any of the standard color numbers, from 0 to 255. When color is set to -1, the vector is drawn in XOR ink.

NOTE When one XOR-colored vector overdraws another vector, it is drawn in a complimentary color. When an XOR-color vector overdraws itself, it becomes invisible.

The mode argument determines whether the vector is displayed as highlighted or normal. To display normally, mode equals zero. Any other value highlights the vector.

This function returns RTNORM except when a critical error occurs.

NOTE If you need to draw multiple vectors, use the sds_grvecs function.

Example

int color,highlight;

sds_point firstpt,secondpt;

sds_getpoint(NULL,"\nFirst point for vector. ",firstpt);

sds_getpoint(NULL,"\nSecond point for vector. ",secondpt);

sds_getint("\nEnter a color number (0-255): ",&color);

sds_getint("\nEnter 1 for highlighted, 0 for normal display. ,&highlight);

sds_grdraw(firstpt,secondpt,color,highlight);

Programming Overview of SDS (Solutions Development System)

sds_grvecs

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