up-center trapezium working

1 files changed, 48 insertions, 0 deletions

diff --git a/draw.c b/draw.c
index e1ee63b..3e973b9 100644
--- a/draw.c
+++ b/draw.c
@@ -204,6 +204,54 @@ char flip_par_lean(char st){
 }
 
 void draw_trapezium(int x1, int y1, char st, char fix){
+	int xmin, ymin, xmax, ymax;
+	int dx, dy, ylong, yshort, xoff;
+	int xincr;
+	int i;
+	void (*f)(int, int, char);
+
+
+	xmin = MIN(x, x1);
+	xmax = MAX(x, x1);
+	ymin = MIN(y, y1);
+	ymax = MAX(y, y1);
+	dx = xmax - xmin;
+	dy = ymax - ymin;
+	
+	if (fix == FIX){
+		f = set_xy;
+		copy_lines_to_ring(ymin, ymax, PRV_STATE);
+	}
+	else
+		f = draw_xy;
+
+	/* This is valid only for "upper" trapezoids */
+	if (st & BOX_TRAP_U){
+		ylong = ymax;
+		yshort = ymin;
+		xoff = dy;
+		xincr = -1;
+	}
+	for(i=xmin+1; i<=xmax; i++){
+		f(i, ylong, line_h);
+	}
+	for(i=xmin+xoff; i<=xmax-xoff; i++){
+		f(i, yshort, line_h);
+	}
+	f(xmin+xoff, yshort, corner);
+	f(xmin, ylong, corner);
+	f(xmax-xoff, yshort, corner);
+	f(xmax, ylong, corner);
+	xoff --;
+	for(i=ymin+1; i<ymax; i++, xoff += xincr){
+		f(xmin + xoff, i, '/');
+		f(xmax - xoff, i, '\\');
+	}	
+
+	
+	if (fix == FIX)
+		copy_lines_to_ring(ymin, ymax, NEW_STATE);
+	show_cursor();
 
 }