2: #include <../src/sys/draw/utils/lgimpl.h>

  6: /*@
  7:    PetscDrawLGAddPoint - Adds another point to each of the line graphs. 
  8:    The new point must have an X coordinate larger than the old points.

 10:    Not Collective, but ignored by all processors except processor 0 in PetscDrawLG

 12:    Input Parameters:
 13: +  lg - the LineGraph data structure
 14: -  x, y - the points to two vectors containing the new x and y 
 15:           point for each curve.

 17:    Level: intermediate

 19:    Concepts: line graph^adding points

 21: .seealso: PetscDrawLGAddPoints()
 22: @*/
 23: PetscErrorCode  PetscDrawLGAddPoint(PetscDrawLG lg,PetscReal *x,PetscReal *y)
 24: {
 26:   int            i;

 29:   if (lg && ((PetscObject)lg)->classid == PETSC_DRAW_CLASSID) return(0);

 32:   if (lg->loc+lg->dim >= lg->len) { /* allocate more space */
 33:     PetscReal *tmpx,*tmpy;
 34:     PetscMalloc2(lg->len+lg->dim*CHUNCKSIZE,PetscReal,&tmpx,lg->len+lg->dim*CHUNCKSIZE,PetscReal,&tmpy);
 35:     PetscLogObjectMemory(lg,2*lg->dim*CHUNCKSIZE*sizeof(PetscReal));
 36:     PetscMemcpy(tmpx,lg->x,lg->len*sizeof(PetscReal));
 37:     PetscMemcpy(tmpy,lg->y,lg->len*sizeof(PetscReal));
 38:     PetscFree2(lg->x,lg->y);
 39:     lg->x = tmpx;
 40:     lg->y = tmpy;
 41:     lg->len += lg->dim*CHUNCKSIZE;
 42:   }
 43:   for (i=0; i<lg->dim; i++) {
 44:     if (x[i] > lg->xmax) lg->xmax = x[i];
 45:     if (x[i] < lg->xmin) lg->xmin = x[i];
 46:     if (y[i] > lg->ymax) lg->ymax = y[i];
 47:     if (y[i] < lg->ymin) lg->ymin = y[i];

 49:     lg->x[lg->loc]   = x[i];
 50:     lg->y[lg->loc++] = y[i];
 51:   }
 52:   lg->nopts++;
 53:   return(0);
 54: }

 58: /*@C
 59:    PetscDrawLGAddPoints - Adds several points to each of the line graphs.
 60:    The new points must have an X coordinate larger than the old points.

 62:    Not Collective, but ignored by all processors except processor 0 in PetscDrawLG

 64:    Input Parameters:
 65: +  lg - the LineGraph data structure
 66: .  xx,yy - points to two arrays of pointers that point to arrays 
 67:            containing the new x and y points for each curve.
 68: -  n - number of points being added

 70:    Level: intermediate


 73:    Concepts: line graph^adding points

 75: .seealso: PetscDrawLGAddPoint()
 76: @*/
 77: PetscErrorCode  PetscDrawLGAddPoints(PetscDrawLG lg,int n,PetscReal **xx,PetscReal **yy)
 78: {
 80:   int            i,j,k;
 81:   PetscReal      *x,*y;

 84:   if (lg && ((PetscObject)lg)->classid == PETSC_DRAW_CLASSID) return(0);
 86:   if (lg->loc+n*lg->dim >= lg->len) { /* allocate more space */
 87:     PetscReal *tmpx,*tmpy;
 88:     int    chunk = CHUNCKSIZE;

 90:     if (n > chunk) chunk = n;
 91:     PetscMalloc2(lg->len+lg->dim*chunk,PetscReal,&tmpx,lg->len+lg->dim*chunk,PetscReal,&tmpy);
 92:     PetscLogObjectMemory(lg,2*lg->dim*chunk*sizeof(PetscReal));
 93:     PetscMemcpy(tmpx,lg->x,lg->len*sizeof(PetscReal));
 94:     PetscMemcpy(tmpy,lg->y,lg->len*sizeof(PetscReal));
 95:     PetscFree2(lg->x,lg->y);
 96:     lg->x = tmpx;
 97:     lg->y = tmpy;
 98:     lg->len += lg->dim*chunk;
 99:   }
100:   for (j=0; j<lg->dim; j++) {
101:     x = xx[j]; y = yy[j];
102:     k = lg->loc + j;
103:     for (i=0; i<n; i++) {
104:       if (x[i] > lg->xmax) lg->xmax = x[i];
105:       if (x[i] < lg->xmin) lg->xmin = x[i];
106:       if (y[i] > lg->ymax) lg->ymax = y[i];
107:       if (y[i] < lg->ymin) lg->ymin = y[i];

109:       lg->x[k]   = x[i];
110:       lg->y[k] = y[i];
111:       k += lg->dim;
112:     }
113:   }
114:   lg->loc   += n*lg->dim;
115:   lg->nopts += n;
116:   return(0);
117: }

119: 
122: /*@
123:    PetscDrawLGSetLimits - Sets the axis limits for a line graph. If more
124:    points are added after this call, the limits will be adjusted to
125:    include those additional points.

127:    Not Collective, but ignored by all processors except processor 0 in PetscDrawLG

129:    Input Parameters:
130: +  xlg - the line graph context
131: -  x_min,x_max,y_min,y_max - the limits

133:    Level: intermediate

135:    Concepts: line graph^setting axis

137: @*/
138: PetscErrorCode  PetscDrawLGSetLimits(PetscDrawLG lg,PetscReal x_min,PetscReal x_max,PetscReal y_min,PetscReal y_max)
139: {
141:   if (lg && ((PetscObject)lg)->classid == PETSC_DRAW_CLASSID) return(0);
143:   (lg)->xmin = x_min;
144:   (lg)->xmax = x_max;
145:   (lg)->ymin = y_min;
146:   (lg)->ymax = y_max;
147:   return(0);
148: }
149: