VI10AddArc3
V = Vector
I = Image
Function that is used to manage the Vector Image feature (object that resides on some Qpaint versions).
The VI10AddArc3 function adds the ARC3 command queued to be processed in the Buffer instructions to perform the drawing.
The ARC3 commandtrace an arc on the circumference of a circle whose center is located at Xo and Yo passed to the function. This arc go from current coordinates to the X, Y coordinates, these passed to the function.
The X and Y coordinates are also set, at the end of the statement, as current coordinates.
| Buffer |
 |
IMPLEMENTATION
VI10AddArc3 (awBuffer, Coord_X, Coord_Y, Centre_Xo, Centre_Yo, Radius)
Parameters:
| IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
|---|---|---|---|---|
| IN | ARRSYS / ARRGBL | awBuffer | W | Array that serves as a buffer for instructions/data |
| IN | CONST/ GLOBAL | Coord_X | W | Variable containing the value of the X coordinate of the end point of arc, within the Vector Image object. |
| IN | CONST/ GLOBAL | Coord_Y | W | Variable containing the value of the Y coordinate of the end point of arc, within the Vector Image object. |
| IN | CONST/ GLOBAL | Centre_Xo | W | Variable containing the Xo circumferential Center coordinate value on which the arc is drawn. |
| IN | CONST/ GLOBAL | Centre_Yo | W | Variable containing the Yo circumferential Center coordinate value on which the arc is drawn. |
| IN | CONST/ GLOBAL | Radius | W | Variable containing the value of the radius of the circle on which you want to draw the arc. |
Example
TASK_00
MAIN: VI10InitBuffer (awBuffer) ;Initializes the Buffer Color = 0 ;Sets black color VI10AddPen (awBuffer, Color) ;Adds the PEN command Coord_X = 0 ;Sets the coordinates for the MOVE Coord_y = 70 VI10AddMove (awBuffer, Coord_X, Coord_Y) ;Adds the MOve command Coord_X = 20 ;Sets the coordinates of the end point of arc Coord_y = 50 Centre_Xo = 0 ;Sets the coordinates of the circumference center Centre_Yo = 50 Radius = 20 ;Sets the radius of the circumference VI10AddArc3 (awBuffer, Coord_X, Coord_Y, Centre_Xo, Centre_Yo, Radius) ;Adds the ARC3 command .... WAIT 1 JUMP MAIN END
Note
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Considered the picture below:
the ARC3 command trace an arc of a circle from point A to point B, on a circle that has its own centre in Co (Xo, Yo).