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_",0};

  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


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

 23: @*/
 24: PetscErrorCode  PetscDrawMarker(PetscDraw draw,PetscReal xl,PetscReal yl,int cl)
 25: {

 30:   if (draw->markertype == PETSC_DRAW_MARKER_CROSS){
 31:     if (draw->ops->coordinatetopixel && draw->ops->pointpixel) {
 32:       int i,j,k;
 33:       (*draw->ops->coordinatetopixel)(draw,xl,yl,&i,&j);
 34:       for (k=-2; k<=2; k++) {
 35:         (*draw->ops->pointpixel)(draw,i+k,j+k,cl);
 36:         (*draw->ops->pointpixel)(draw,i+k,j-k,cl);
 37:       }
 38:     } else if (draw->ops->string) {
 39:        (*draw->ops->string)(draw,xl,yl,cl,"x");
 40:     } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"No support for drawing marker type CROSS");
 41:   } else if (draw->markertype == PETSC_DRAW_MARKER_PLUS){
 42:     if (draw->ops->coordinatetopixel && draw->ops->pointpixel) {
 43:       int i,j,k;
 44:       (*draw->ops->coordinatetopixel)(draw,xl,yl,&i,&j);
 45:       for (k=-2; k<=2; k++) {
 46:         (*draw->ops->pointpixel)(draw,i,j+k,cl);
 47:         (*draw->ops->pointpixel)(draw,i+k,j,cl);
 48:       }
 49:     } else if (draw->ops->string) {
 50:        (*draw->ops->string)(draw,xl,yl,cl,"+");
 51:     } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"No support for drawing marker type PLUS");
 52:   } else if (draw->markertype == PETSC_DRAW_MARKER_CIRCLE){
 53:     if (draw->ops->coordinatetopixel && draw->ops->pointpixel) {
 54:       int i,j,k;
 55:       (*draw->ops->coordinatetopixel)(draw,xl,yl,&i,&j);
 56:       for (k=-1; k<=1; k++) {
 57:         (*draw->ops->pointpixel)(draw,i+2,j+k,cl);
 58:         (*draw->ops->pointpixel)(draw,i-2,j+k,cl);
 59:         (*draw->ops->pointpixel)(draw,i+k,j+2,cl);
 60:         (*draw->ops->pointpixel)(draw,i+k,j-2,cl);
 61:       }
 62:     } else if (draw->ops->string) {
 63:        (*draw->ops->string)(draw,xl,yl,cl,"+");
 64:     } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"No support for drawing marker type CIRCLE");
 65:   } else {
 66:     (*draw->ops->point)(draw,xl,yl,cl);
 67:   }
 68:   return(0);
 69: }

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

 74:    Not collective

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

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

 83:    Level: beginner


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

 88: @*/
 89: PetscErrorCode  PetscDrawSetMarkerType(PetscDraw draw,PetscDrawMarkerType mtype)
 90: {
 93:   draw->markertype = mtype;
 94:   return(0);
 95: }

 97: /*@
 98:    PetscDrawGetMarkerType - gets the type of marker to display with PetscDrawMarker()

100:    Not collective

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

106:    Level: beginner


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

111: @*/
112: PetscErrorCode  PetscDrawGetMarkerType(PetscDraw draw,PetscDrawMarkerType *mtype)
113: {
116:   *mtype = draw->markertype;
117:   return(0);
118: }