Date: 2022-03-04T17:37:00+00:00

Actual source code: dmarker.c

      2: /*
      3:        Provides the calling sequences for all the basic PetscDraw routines.
      4: */
      5: #include <petsc/private/drawimpl.h>
      6: const char *const PetscDrawMarkerTypes[]     = {"CROSS","POINT","PLUS","CIRCLE","PetscDrawMarkerType","PETSC_DRAW_MARKER_",NULL};

      8: /*@
      9:    PetscDrawMarker - PetscDraws a marker onto a drawable.

     11:    Not collective

     13:    Input Parameters:
     14: +  draw - the drawing context
     15: .  xl,yl - the coordinates of the marker
     16: -  cl - the color of the marker

     18:    Level: beginner

     20: .seealso: PetscDrawPoint(), PetscDrawString(), PetscDrawSetMarkerType(), PetscDrawGetMarkerType()

     22: @*/
     23: PetscErrorCode  PetscDrawMarker(PetscDraw draw,PetscReal xl,PetscReal yl,int cl)
     24: {

     29:   if (draw->markertype == PETSC_DRAW_MARKER_CROSS) {
     30:     if (draw->ops->coordinatetopixel && draw->ops->pointpixel) {
     31:       int i,j,k;
     32:       (*draw->ops->coordinatetopixel)(draw,xl,yl,&i,&j);
     33:       for (k=-2; k<=2; k++) {
     34:         (*draw->ops->pointpixel)(draw,i+k,j+k,cl);
     35:         (*draw->ops->pointpixel)(draw,i+k,j-k,cl);
     36:       }
     37:     } else if (draw->ops->string) {
     38:        (*draw->ops->string)(draw,xl,yl,cl,"x");
     39:     } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"No support for drawing marker type CROSS");
     40:   } else if (draw->markertype == PETSC_DRAW_MARKER_PLUS) {
     41:     if (draw->ops->coordinatetopixel && draw->ops->pointpixel) {
     42:       int i,j,k;
     43:       (*draw->ops->coordinatetopixel)(draw,xl,yl,&i,&j);
     44:       for (k=-2; k<=2; k++) {
     45:         (*draw->ops->pointpixel)(draw,i,j+k,cl);
     46:         (*draw->ops->pointpixel)(draw,i+k,j,cl);
     47:       }
     48:     } else if (draw->ops->string) {
     49:        (*draw->ops->string)(draw,xl,yl,cl,"+");
     50:     } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"No support for drawing marker type PLUS");
     51:   } else if (draw->markertype == PETSC_DRAW_MARKER_CIRCLE) {
     52:     if (draw->ops->coordinatetopixel && draw->ops->pointpixel) {
     53:       int i,j,k;
     54:       (*draw->ops->coordinatetopixel)(draw,xl,yl,&i,&j);
     55:       for (k=-1; k<=1; k++) {
     56:         (*draw->ops->pointpixel)(draw,i+2,j+k,cl);
     57:         (*draw->ops->pointpixel)(draw,i-2,j+k,cl);
     58:         (*draw->ops->pointpixel)(draw,i+k,j+2,cl);
     59:         (*draw->ops->pointpixel)(draw,i+k,j-2,cl);
     60:       }
     61:     } else if (draw->ops->string) {
     62:        (*draw->ops->string)(draw,xl,yl,cl,"+");
     63:     } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"No support for drawing marker type CIRCLE");
     64:   } else {
     65:     (*draw->ops->point)(draw,xl,yl,cl);
     66:   }
     67:   return(0);
     68: }

     70: /*@
     71:    PetscDrawSetMarkerType - sets the type of marker to display with PetscDrawMarker()

     73:    Not collective

     75:    Input Parameters:
     76: +  draw - the drawing context
     77: -  mtype - either PETSC_DRAW_MARKER_CROSS (default) or PETSC_DRAW_MARKER_POINT

     79:    Options Database:
     80: .  -draw_marker_type - x or point

     82:    Level: beginner

     84: .seealso: PetscDrawPoint(), PetscDrawMarker(), PetscDrawGetMarkerType()

     86: @*/
     87: PetscErrorCode  PetscDrawSetMarkerType(PetscDraw draw,PetscDrawMarkerType mtype)
     88: {
     91:   draw->markertype = mtype;
     92:   return(0);
     93: }

     95: /*@
     96:    PetscDrawGetMarkerType - gets the type of marker to display with PetscDrawMarker()

     98:    Not collective

    100:    Input Parameters:
    101: +  draw - the drawing context
    102: -  mtype - either PETSC_DRAW_MARKER_CROSS (default) or PETSC_DRAW_MARKER_POINT

    104:    Level: beginner

    106: .seealso: PetscDrawPoint(), PetscDrawMarker(), PetscDrawSetMarkerType()

    108: @*/
    109: PetscErrorCode  PetscDrawGetMarkerType(PetscDraw draw,PetscDrawMarkerType *mtype)
    110: {
    113:   *mtype = draw->markertype;
    114:   return(0);
    115: }