setlinestyle() function in C
The header file graphics.h contains setlinestyle() function which sets the style for all lines drawn by line, lineto, rectangle, drawpoly, and so on.
Syntax :
void setlinestyle(int linestyle, unsigned upattern, int thickness);
Examples :
Input : x = 200, y = 100 Output : x and y are initialized as (200, 100). For every line, value of y increments by 25 to change the position. The line style keep changing corresponding to value of first parameter(c).
Explanation : linestyle specifies in which of several styles subsequent lines will be drawn (such as solid, dotted, centered, dashed).
upattern is a 16-bit pattern that applies only if linestyle is USERBIT_LINE (4). In that case, whenever a bit in the pattern word is 1, the corresponding pixel in the line is drawn in the current drawing color. A value for ‘upattern’ must always be supplied. It is simply ignored if ‘linestyle’ is not USERBIT_LINE (4).
thickness specifies whether the width of subsequent lines drawn will be normal or thick.
Below is the implementation of setlinestyle() function :
// C Implementation for setlinestyle() #include <graphics.h> // driver code int main() { // gm is Graphics mode which is // a computer display mode that // generates image using pixels. // DETECT is a macro defined in // "graphics.h" header file int gd = DETECT, gm; // variable to change the // line styles int c; // initial coordinate to // draw line int x = 200, y = 100; // initgraph initializes the // graphics system by loading a // graphics driver from disk initgraph(&gd, &gm, "" ); // To keep track of lines for ( c = 0 ; c < 5 ; c++ ) { // setlinestyle function setlinestyle(c, 0, 1); // Drawing line line(x, y, x+200, y); y = y + 25; } getch(); // closegraph function closes the // graphics mode and deallocates // all memory allocated by // graphics system . closegraph(); return 0; } |
Output :
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