Changed the way circle sections are drawn.

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@96 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/src/rrd_gfx.c b/src/rrd_gfx.c
index 1a45439..405291b 100644 (file)
--- a/src/rrd_gfx.c
+++ b/src/rrd_gfx.c
@@ -108,52 +108,6 @@ gfx_node_t   *gfx_new_area   (gfx_canvas_t *canvas,
 
   return node;
 }
-/* create an arc section (2*M_PI is full circle) */
-gfx_node_t   *gfx_arc_sect   (gfx_canvas_t *canvas, 
-                             double centerx, double centery,
-                             double radiusx, double radiusy,
-                             double start, double end,
-                             gfx_color_t color) {
-
-  gfx_node_t *node;
-  ArtVpath *vec;
-  int counter;
-  double position;
-
-/* 20 is too low, 100 is overkill */
-#define AMOUNT_OF_VECTORS 50
-
-  node = gfx_new_node(canvas,GFX_AREA);
-  if (node == NULL) return NULL;
-  vec = art_new(ArtVpath, AMOUNT_OF_VECTORS+4);
-  if (vec == NULL) return NULL;
-
-  vec[0].code = ART_MOVETO;
-  vec[0].x = centerx;
-  vec[0].y = centery;
-
-  for (counter=0;counter<=AMOUNT_OF_VECTORS;) {
-    position=start + counter*(end-start)/AMOUNT_OF_VECTORS;
-
-    counter++;
-    vec[counter].code = ART_LINETO;
-    vec[counter].x = centerx + sin(position)*radiusx;
-    vec[counter].y = centery - cos(position)*radiusy;
-  }
-
-  vec[AMOUNT_OF_VECTORS+2].code = ART_LINETO;
-  vec[AMOUNT_OF_VECTORS+2].x = centerx;
-  vec[AMOUNT_OF_VECTORS+2].y = centery;
-
-  vec[AMOUNT_OF_VECTORS+3].code = ART_END;
-  
-  node->points = AMOUNT_OF_VECTORS+4;
-  node->points_max = AMOUNT_OF_VECTORS+4;
-  node->color = color;
-  node->path  = vec;
-
-  return node;
-}
 
 /* add a point to a line or to an area */
 int           gfx_add_point  (gfx_node_t *node, 

diff --git a/src/rrd_gfx.h b/src/rrd_gfx.h
index 8362ff1..808b7c4 100644 (file)
--- a/src/rrd_gfx.h
+++ b/src/rrd_gfx.h
@@ -54,13 +54,6 @@ gfx_node_t   *gfx_new_area   (gfx_canvas_t *canvas,
                              double x2, double y2,
                              gfx_color_t  color);
 
-/* create an arc section (2*M_PI is full circle) */
-gfx_node_t   *gfx_arc_sect   (gfx_canvas_t *canvas, 
-                             double centerx, double centery,
-                             double radiusx, double radiusy,
-                             double start, double end,
-                             gfx_color_t color);
-
 /* add a point to a line or to an area */
 int           gfx_add_point  (gfx_node_t *node, double x, double y);
 

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index c7ba63e..ea7ed0d 100644 (file)
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -1851,8 +1851,8 @@ graph_paint(image_desc_t *im, char ***calcpr)
 {
   int i,ii;
   int lazy =     lazy_check(im);
-  int piechart = 0, PieSize, PieCenterX, PieCenterY;
-  double PieStart=0.0;
+  int piechart = 0;
+  double PieStart=0.0, PieSize, PieCenterX, PieCenterY;
   FILE  *fo;
   gfx_canvas_t *canvas;
   gfx_node_t *node;
@@ -1933,7 +1933,7 @@ graph_paint(image_desc_t *im, char ***calcpr)
     PieCenterX = im->xorigin + im->xsize + 50 + PieSize*0.6;
     PieCenterY = im->yorigin - PieSize*0.5;
   }
-  
+
   /* determine where to place the legends onto the graphics.
      and set im->ygif to match space requirements for text */
   if(leg_place(im)==-1)
@@ -1941,6 +1941,7 @@ graph_paint(image_desc_t *im, char ***calcpr)
 
   canvas=gfx_new_canvas();
 
+
   /* the actual graph is created by going through the individual
      graph elements and then drawing them */
   
@@ -1960,22 +1961,54 @@ graph_paint(image_desc_t *im, char ***calcpr)
   
   gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
 
-  if (piechart) {
-#if 1
-    node=gfx_arc_sect (canvas,
-       PieCenterX,PieCenterY,
-       PieSize*0.6, PieSize*0.6,       /* 20% more as background */
-       0,M_PI*2,
-       im->graph_col[GRC_CANVAS]);
-#else
-    node=gfx_new_area ( canvas,
-       PieCenterX-0.6*PieSize, PieCenterY-0.6*PieSize,
-       PieCenterX+0.6*PieSize, PieCenterY-0.6*PieSize,
-       PieCenterX+0.6*PieSize, PieCenterY+0.6*PieSize,
-       im->graph_col[GRC_CANVAS]);
-    gfx_add_point(node,
-       PieCenterX-0.6*PieSize, PieCenterY+0.6*PieSize);
+#if 0
+/******************************************************************
+ ** Just to play around.  If you see this, I forgot to remove it **
+ ******************************************************************/
+  im->ygif+=100;
+  node=gfx_new_area(canvas,
+                       0,              im->ygif-100,
+                       im->xgif,       im->ygif-100,
+                       im->xgif,       im->ygif,
+                       im->graph_col[GRC_CANVAS]);
+  gfx_add_point(node,0,im->ygif);
+
+  node=gfx_new_line (canvas,
+               0,              im->ygif-100,
+               im->xgif-3,     im->ygif-100,
+               1.0,
+               0xFF0000FF);
+  gfx_add_point(node,im->xgif-3,im->ygif-3);
+  gfx_add_point(node,2,im->ygif-3);
+  gfx_add_point(node,2,im->ygif-100);
+
+
+#if 0
+  node=gfx_new_area ( canvas,
+                       1,              im->ygif-99,
+                       im->xgif-1,     im->ygif-99,
+                       im->xgif-1,     im->ygif-1,
+                       im->graph_col[GRC_CANVAS]);
+  gfx_add_point(node,1,im->ygif-1);
+#endif
+
 #endif
+
+  if (piechart) {
+       int n;
+
+       node=gfx_new_area(canvas,
+               PieCenterX,PieCenterY-PieSize*0.6,
+               PieCenterX,PieCenterY,
+               PieCenterX,PieCenterY-PieSize*0.6,
+               im->graph_col[GRC_CANVAS]);
+       for (n=1;n<500;n++) {
+               double angle;
+               angle=M_PI*2.0*n/500.0;
+               gfx_add_point(node,
+               PieCenterX+sin(angle)*PieSize*0.6,
+               PieCenterY-cos(angle)*PieSize*0.6 );
+       }
   }
 
   if (im->minval > 0.0)
@@ -2110,12 +2143,25 @@ graph_paint(image_desc_t *im, char ***calcpr)
        im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
      
       if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
-       node=gfx_arc_sect(canvas,
-               PieCenterX, PieCenterY,
-               PieSize/2,PieSize/2,
-               M_PI*2.0*PieStart/100.0,
-               M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0,
+       double angle,endangle;
+       int n;
+
+       angle=M_PI*2.0*PieStart/100.0;
+       endangle=M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0;
+       node=gfx_new_area(canvas,
+               PieCenterX+sin(endangle)*PieSize/2,
+               PieCenterY-cos(endangle)*PieSize/2,
+               PieCenterX,
+               PieCenterY,
+               PieCenterX+sin(angle)*PieSize/2,
+               PieCenterY-cos(angle)*PieSize/2,
                im->gdes[i].col);
+       for (n=1;n<100;n++) {
+               angle=M_PI*2.0*(PieStart+n/100.0*im->gdes[i].yrule)/100.0;
+               gfx_add_point(node,
+               PieCenterX+sin(angle)*PieSize/2,
+               PieCenterY-cos(angle)*PieSize/2 );
+       }
        PieStart += im->gdes[i].yrule;
       }
       break;