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: }