int main(int argc,char **argv)
{
PetscDraw draw;
PetscErrorCode ierr;
int x = 0,y = 0,width = 300,height = 300;
ierr = PetscInitialize(&argc,&argv,(char*)0,help);CHKERRQ(ierr);
ierr = PetscDrawCreate(PETSC_COMM_WORLD,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr);
#if defined (PETSC_HAVE_X)
ierr = PetscDrawSetType(draw,"x");CHKERRQ(ierr);
ierr = PetscDrawSetType(draw,"null");CHKERRQ(ierr);
ierr = PetscDrawSetType(draw,"x");CHKERRQ(ierr);
#else
ierr = PetscDrawSetType(draw,"null");CHKERRQ(ierr);
#endif
ierr = PetscDrawSetViewPort(draw,.25,.25,.75,.75);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,0.0,0.0,1.0,1.0,PETSC_DRAW_BLACK);CHKERRQ(ierr);
ierr = PetscDrawString(draw,.2,.2,PETSC_DRAW_RED,"Some Text");CHKERRQ(ierr);
ierr = PetscDrawStringSetSize(draw,.5,.5);CHKERRQ(ierr);
ierr = PetscDrawString(draw,.2,.2,PETSC_DRAW_BLUE,"Some Text");CHKERRQ(ierr);
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscSleep(2);CHKERRQ(ierr);
ierr = PetscDrawClear(draw);CHKERRQ(ierr); ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawResizeWindow(draw,600,600);CHKERRQ(ierr);
ierr = PetscSleep(2);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,0.0,1.0,1.0,0.0,PETSC_DRAW_BLUE);
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscSleep(2);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscFinalize();
return 0;
}
PetscErrorCode PetscDrawDestroy_X(PetscDraw draw)
{
PetscDraw_X *win = (PetscDraw_X*)draw->data;
PetscErrorCode ierr;
#if defined(PETSC_HAVE_POPEN)
char command[PETSC_MAX_PATH_LEN];
PetscMPIInt rank;
FILE *fd;
#endif
PetscFunctionBegin;
ierr = PetscDrawSynchronizedClear(draw);CHKERRQ(ierr);
#if defined(PETSC_HAVE_POPEN)
ierr = MPI_Comm_rank(((PetscObject)draw)->comm,&rank);CHKERRQ(ierr);
if (draw->savefilename && !rank && draw->savefilemovie) {
ierr = PetscSNPrintf(command,PETSC_MAX_PATH_LEN,"ffmpeg -i %s_%%d.Gif %s.m4v",draw->savefilename,draw->savefilename);CHKERRQ(ierr);
ierr = PetscPOpen(((PetscObject)draw)->comm,PETSC_NULL,command,"r",&fd);CHKERRQ(ierr);
ierr = PetscPClose(((PetscObject)draw)->comm,fd,PETSC_NULL);CHKERRQ(ierr);
}
#endif
XFreeGC(win->disp,win->gc.set);
XCloseDisplay(win->disp);
ierr = PetscDrawDestroy(&draw->popup);CHKERRQ(ierr);
ierr = PetscFree(win->font);CHKERRQ(ierr);
ierr = PetscFree(win);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
int main(int argc,char **argv)
{
PetscDraw draw;
PetscDrawLG lg;
PetscDrawAxis axis;
PetscInt n = 15,i,x = 0,y = 0,width = 400,height = 300,nports = 1;
PetscBool useports,flg;
const char *xlabel,*ylabel,*toplabel,*legend;
PetscReal xd,yd;
PetscDrawViewPorts *ports = NULL;
PetscErrorCode ierr;
toplabel = "Top Label"; xlabel = "X-axis Label"; ylabel = "Y-axis Label"; legend = "Legend";
ierr = PetscInitialize(&argc,&argv,NULL,help);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(NULL,NULL,"-x",&x,NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(NULL,NULL,"-y",&y,NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(NULL,NULL,"-width",&width,NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(NULL,NULL,"-height",&height,NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(NULL,NULL,"-nports",&nports,&useports);CHKERRQ(ierr);
ierr = PetscOptionsHasName(NULL,NULL,"-nolegend",&flg);CHKERRQ(ierr);
if (flg) legend = NULL;
ierr = PetscOptionsHasName(NULL,NULL,"-notoplabel",&flg);CHKERRQ(ierr);
if (flg) toplabel = NULL;
ierr = PetscOptionsHasName(NULL,NULL,"-noxlabel",&flg);CHKERRQ(ierr);
if (flg) xlabel = NULL;
ierr = PetscOptionsHasName(NULL,NULL,"-noylabel",&flg);CHKERRQ(ierr);
if (flg) ylabel = NULL;
ierr = PetscOptionsHasName(NULL,NULL,"-nolabels",&flg);CHKERRQ(ierr);
if (flg) {toplabel = NULL; xlabel = NULL; ylabel = NULL;}
ierr = PetscDrawCreate(PETSC_COMM_WORLD,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
if (useports) {
ierr = PetscDrawViewPortsCreate(draw,nports,&ports);CHKERRQ(ierr);
ierr = PetscDrawViewPortsSet(ports,0);CHKERRQ(ierr);
}
ierr = PetscDrawLGCreate(draw,1,&lg);CHKERRQ(ierr);
ierr = PetscDrawLGSetUseMarkers(lg,PETSC_TRUE);CHKERRQ(ierr);
ierr = PetscDrawLGGetAxis(lg,&axis);CHKERRQ(ierr);
ierr = PetscDrawAxisSetColors(axis,PETSC_DRAW_BLACK,PETSC_DRAW_RED,PETSC_DRAW_BLUE);CHKERRQ(ierr);
ierr = PetscDrawAxisSetLabels(axis,toplabel,xlabel,ylabel);CHKERRQ(ierr);
ierr = PetscDrawLGSetLegend(lg,&legend);CHKERRQ(ierr);
ierr = PetscDrawLGSetFromOptions(lg);CHKERRQ(ierr);
for (i=0; i<=n; i++) {
xd = (PetscReal)(i - 5); yd = xd*xd;
ierr = PetscDrawLGAddPoint(lg,&xd,&yd);CHKERRQ(ierr);
}
ierr = PetscDrawLGDraw(lg);CHKERRQ(ierr);
ierr = PetscDrawLGSave(lg);CHKERRQ(ierr);
ierr = PetscDrawViewPortsDestroy(ports);CHKERRQ(ierr);
ierr = PetscDrawLGDestroy(&lg);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscFinalize();
return ierr;
}
static PetscErrorCode PetscDrawRestoreSingleton_Image(PetscDraw draw,PetscDraw *sdraw)
{
PetscImage pimg = (PetscImage)draw->data;
PetscImage simg = (PetscImage)(*sdraw)->data;
PetscErrorCode ierr;
PetscFunctionBegin;
ierr = PetscMemcpy(pimg->buffer,simg->buffer,(size_t)(pimg->w*pimg->h));CHKERRQ(ierr);
ierr = PetscDrawDestroy(sdraw);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
static PetscErrorCode PetscDrawDestroy_Image(PetscDraw draw)
{
PetscImage img = (PetscImage)draw->data;
PetscErrorCode ierr;
PetscFunctionBegin;
ierr = PetscDrawDestroy(&draw->popup);CHKERRQ(ierr);
ierr = PetscFree(img->buffer);CHKERRQ(ierr);
ierr = PetscFree(draw->data);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
/*@
KSPMonitorLGResidualNormDestroy - Destroys a line graph context that was created
with KSPMonitorLGResidualNormCreate().
Collective on KSP
Input Parameter:
. draw - the drawing context
Level: intermediate
.keywords: KSP, monitor, line graph, destroy
.seealso: KSPMonitorLGResidualNormCreate(), KSPMonitorLGTrueResidualDestroy(), KSPMonitorSet()
@*/
PetscErrorCode KSPMonitorLGResidualNormDestroy(PetscObject **objs)
{
PetscErrorCode ierr;
PetscDrawLG drawlg = (PetscDrawLG) (*objs)[0];
PetscDraw draw = (PetscDraw) (*objs)[1];
PetscFunctionBegin;
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscDrawLGDestroy(&drawlg);CHKERRQ(ierr);
ierr = PetscFree(*objs);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
PetscErrorCode DrawFA(FA fa,Vec v)
{
PetscErrorCode ierr;
PetscScalar *va;
ZoomCtx zctx;
PetscReal xmint = 10000.0,xmaxt = -10000.0,ymint = 100000.0,ymaxt = -10000.0;
PetscReal xmin,xmax,ymin,ymax;
PetscInt i,vn,ln,j;
PetscFunctionBeginUser;
ierr = VecGetArray(v,&va);CHKERRQ(ierr);
ierr = VecGetSize(v,&vn);CHKERRQ(ierr);
ierr = VecGetSize(fa->l,&ln);CHKERRQ(ierr);
for (j=0; j<3; j++) {
if (vn == ln) {
zctx.xy[j] = va + 2*fa->offl[j];
zctx.m[j] = fa->ml[j];
zctx.n[j] = fa->nl[j];
} else {
zctx.xy[j] = va + 2*fa->offg[j];
zctx.m[j] = fa->mg[j];
zctx.n[j] = fa->ng[j];
}
for (i=0; i<zctx.m[j]*zctx.n[j]; i++) {
if (zctx.xy[j][2*i] > xmax) xmax = zctx.xy[j][2*i];
if (zctx.xy[j][2*i] < xmin) xmin = zctx.xy[j][2*i];
if (zctx.xy[j][2*i+1] > ymax) ymax = zctx.xy[j][2*i+1];
if (zctx.xy[j][2*i+1] < ymin) ymin = zctx.xy[j][2*i+1];
}
}
ierr = MPI_Allreduce(&xmin,&xmint,1,MPI_DOUBLE,MPI_MIN,PETSC_COMM_WORLD);CHKERRQ(ierr);
ierr = MPI_Allreduce(&xmax,&xmaxt,1,MPI_DOUBLE,MPI_MAX,PETSC_COMM_WORLD);CHKERRQ(ierr);
ierr = MPI_Allreduce(&ymin,&ymint,1,MPI_DOUBLE,MPI_MIN,PETSC_COMM_WORLD);CHKERRQ(ierr);
ierr = MPI_Allreduce(&ymax,&ymaxt,1,MPI_DOUBLE,MPI_MAX,PETSC_COMM_WORLD);CHKERRQ(ierr);
xmin = xmint - .2*(xmaxt - xmint);
xmax = xmaxt + .2*(xmaxt - xmint);
ymin = ymint - .2*(ymaxt - ymint);
ymax = ymaxt + .2*(ymaxt - ymint);
#if defined(PETSC_HAVE_X) || defined(PETSC_HAVE_OPENGL)
{
PetscDraw draw;
ierr = PetscDrawCreate(PETSC_COMM_WORLD,0,"meshes",PETSC_DECIDE,PETSC_DECIDE,700,700,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscDrawSetCoordinates(draw,xmin,ymin,xmax,ymax);CHKERRQ(ierr);
ierr = PetscDrawZoom(draw,DrawPatch,&zctx);CHKERRQ(ierr);
ierr = VecRestoreArray(v,&va);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
}
#endif
PetscFunctionReturn(0);
}
/*@C
TSMonitorSPEigCtxDestroy - Destroys a scatter plot context that was created with TSMonitorSPEigCtxCreate().
Collective on TSMonitorSPEigCtx
Input Parameter:
. ctx - the monitor context
Level: intermediate
.keywords: TS, monitor, line graph, destroy
.seealso: TSMonitorSPEigCtxCreate(), TSMonitorSet(), TSMonitorSPEig();
@*/
PetscErrorCode TSMonitorSPEigCtxDestroy(TSMonitorSPEigCtx *ctx)
{
PetscDraw draw;
PetscErrorCode ierr;
PetscFunctionBegin;
ierr = PetscDrawSPGetDraw((*ctx)->drawsp,&draw);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscDrawSPDestroy(&(*ctx)->drawsp);CHKERRQ(ierr);
ierr = KSPDestroy(&(*ctx)->ksp);CHKERRQ(ierr);
ierr = PetscRandomDestroy(&(*ctx)->rand);CHKERRQ(ierr);
ierr = PetscFree(*ctx);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
/*@C
PetscDrawViewPortsDestroy - frees a PetscDrawViewPorts object
Collective on PetscDraw inside PetscDrawViewPorts
Input Parameter:
. ports - the PetscDrawViewPorts object
Level: advanced
.seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsSet(), PetscDrawViewPortsCreate()
@*/
PetscErrorCode PetscDrawViewPortsDestroy(PetscDrawViewPorts *ports)
{
PetscErrorCode ierr;
PetscFunctionBegin;
if (!ports) PetscFunctionReturn(0);
PetscValidPointer(ports,1);
/* reset Drawport of Window back to previous value */
ierr = PetscDrawSetViewPort(ports->draw,ports->port_xl,ports->port_yl,ports->port_xr,ports->port_yr);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&ports->draw);CHKERRQ(ierr);
ierr = PetscFree4(ports->xl,ports->xr,ports->yl,ports->yr);CHKERRQ(ierr);
ierr = PetscFree(ports);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
int main(int argc,char **argv)
{
PetscDraw draw;
int x = 0,y = 0,width = 256,height = 256;
PetscErrorCode ierr;
ierr = PetscInitialize(&argc,&argv,(char*)0,help);CHKERRQ(ierr);
ierr = PetscDrawCreate(PETSC_COMM_SELF,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscDrawZoom(draw,zoomfunction,NULL);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscFinalize();
return 0;
}
/*@C
PetscDrawViewPortsDestroy - frees a PetscDrawViewPorts object
Collective on PetscDraw inside PetscDrawViewPorts
Input Parameter:
. ports - the PetscDrawViewPorts object
Level: advanced
.seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsSet(), PetscDrawViewPortsCreate()
@*/
PetscErrorCode PetscDrawViewPortsDestroy(PetscDrawViewPorts *ports)
{
PetscErrorCode ierr;
PetscFunctionBegin;
if (!ports) PetscFunctionReturn(0);
ierr = PetscDrawDestroy(&ports->draw);CHKERRQ(ierr);
ierr = PetscFree(ports->xl);CHKERRQ(ierr);
ierr = PetscFree(ports->xr);CHKERRQ(ierr);
ierr = PetscFree(ports->yl);CHKERRQ(ierr);
ierr = PetscFree(ports->yr);CHKERRQ(ierr);
ierr = PetscFree(ports);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
int main(int argc,char **argv)
{
PetscDraw draw;
PetscDrawLG lg;
PetscDrawAxis axis;
PetscInt n = 20,i,x = 0,y = 0,width = 300,height = 300,nports = 1;
PetscTruth flg;
const char *xlabel,*ylabel,*toplabel;
PetscReal xd,yd;
PetscDrawViewPorts *ports;
PetscErrorCode ierr;
xlabel = "X-axis Label";toplabel = "Top Label";ylabel = "Y-axis Label";
ierr = PetscInitialize(&argc,&argv,(char*)0,help);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(PETSC_NULL,"-width",&width,PETSC_NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(PETSC_NULL,"-height",&height,PETSC_NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);CHKERRQ(ierr);
ierr = PetscOptionsHasName(PETSC_NULL,"-nolabels",&flg);CHKERRQ(ierr);
if (flg) {
xlabel = (char *)0; toplabel = (char *)0;
}
ierr = PetscDrawCreate(PETSC_COMM_SELF,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(PETSC_NULL,"-nports",&nports,PETSC_NULL);CHKERRQ(ierr);
ierr = PetscDrawViewPortsCreate(draw,nports,&ports);CHKERRQ(ierr);
ierr = PetscDrawViewPortsSet(ports,0);CHKERRQ(ierr);
ierr = PetscDrawLGCreate(draw,1,&lg);CHKERRQ(ierr);
ierr = PetscDrawLGGetAxis(lg,&axis);CHKERRQ(ierr);
ierr = PetscDrawAxisSetColors(axis,PETSC_DRAW_BLACK,PETSC_DRAW_RED,PETSC_DRAW_BLUE);CHKERRQ(ierr);
ierr = PetscDrawAxisSetLabels(axis,toplabel,xlabel,ylabel);CHKERRQ(ierr);
for (i=0; i<n ; i++) {
xd = (PetscReal)(i - 5); yd = xd*xd;
ierr = PetscDrawLGAddPoint(lg,&xd,&yd);CHKERRQ(ierr);
}
ierr = PetscDrawLGIndicateDataPoints(lg);CHKERRQ(ierr);
ierr = PetscDrawLGDraw(lg);CHKERRQ(ierr);
ierr = PetscDrawString(draw,-3.,150.0,PETSC_DRAW_BLUE,"A legend");CHKERRQ(ierr);
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscSleep(2);CHKERRQ(ierr);
ierr = PetscDrawViewPortsDestroy(ports);CHKERRQ(ierr);
ierr = PetscDrawLGDestroy(lg);CHKERRQ(ierr);
ierr = PetscDrawDestroy(draw);CHKERRQ(ierr);
ierr = PetscFinalize();CHKERRQ(ierr);
return 0;
}
int main(int argc,char **argv)
{
PetscDraw draw;
PetscErrorCode ierr;
int x = 0,y = 0,width = 300,height = 300;
ierr = PetscInitialize(&argc,&argv,NULL,help);CHKERRQ(ierr);
ierr = PetscDrawCreate(PETSC_COMM_WORLD,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetPause(draw,2.0);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscDrawSetViewPort(draw,.25,.25,.75,.75);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,0.0,0.0,1.0,1.0,PETSC_DRAW_BLACK);CHKERRQ(ierr);
ierr = PetscDrawString(draw,.2,.2,PETSC_DRAW_RED,"Some Text");CHKERRQ(ierr);
ierr = PetscDrawString(draw,.5,.5,PETSC_DRAW_GREEN,"Some Text");CHKERRQ(ierr);
ierr = PetscDrawString(draw,.2,.8,PETSC_DRAW_BLUE,"Some Text");CHKERRQ(ierr);
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawPause(draw);CHKERRQ(ierr);
ierr = PetscDrawSave(draw);CHKERRQ(ierr);
ierr = PetscDrawClear(draw);CHKERRQ(ierr);
/*ierr = PetscDrawStringSetSize(draw,.5,.5);CHKERRQ(ierr);*/
ierr = PetscDrawString(draw,.2,.2,PETSC_DRAW_RED,"Some Text");CHKERRQ(ierr);
ierr = PetscDrawString(draw,.5,.5,PETSC_DRAW_GREEN,"Some Text");CHKERRQ(ierr);
ierr = PetscDrawString(draw,.2,.8,PETSC_DRAW_BLUE,"Some Text");CHKERRQ(ierr);
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawPause(draw);CHKERRQ(ierr);
ierr = PetscDrawSave(draw);CHKERRQ(ierr);
ierr = PetscDrawResizeWindow(draw,600,600);CHKERRQ(ierr);
ierr = PetscDrawGetWindowSize(draw,&width,&height);CHKERRQ(ierr);
ierr = PetscDrawSetViewPort(draw,0,0,1,1);CHKERRQ(ierr);
ierr = PetscDrawClear(draw);CHKERRQ(ierr);
/*ierr = PetscDrawLine(draw,0.0,0.0,1.0,1.0,PETSC_DRAW_RED);CHKERRQ(ierr);*/
/*ierr = PetscDrawLine(draw,0.0,1.0,1.0,0.0,PETSC_DRAW_BLUE);CHKERRQ(ierr);*/
ierr = PetscDrawString(draw,.2,.2,PETSC_DRAW_RED,"Some Text\n Some Other Text");CHKERRQ(ierr);
ierr = PetscDrawString(draw,.5,.5,PETSC_DRAW_RED,"ABCygj\n()[]F$");CHKERRQ(ierr);
ierr = PetscDrawString(draw,0,0,PETSC_DRAW_RED,"Horizontal Text (ABCygj)");CHKERRQ(ierr);
ierr = PetscDrawStringVertical(draw,0,1,PETSC_DRAW_RED,"Vertical Text");CHKERRQ(ierr);
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawPause(draw);CHKERRQ(ierr);
ierr = PetscDrawSave(draw);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscFinalize();
return ierr;
}
/*@C
PetscDrawBarDestroy - Frees all space taken up by bar graph data structure.
Collective over PetscDrawBar
Input Parameter:
. bar - The bar graph context
Level: intermediate
.seealso: PetscDrawBarCreate()
@*/
PetscErrorCode PetscDrawBarDestroy(PetscDrawBar *bar)
{
PetscErrorCode ierr;
PetscFunctionBegin;
if (!*bar) PetscFunctionReturn(0);
PetscValidHeaderSpecific(*bar,PETSC_DRAWBAR_CLASSID,1);
if (--((PetscObject)(*bar))->refct > 0) PetscFunctionReturn(0);
ierr = PetscFree((*bar)->values);CHKERRQ(ierr);
ierr = PetscStrArrayDestroy(&(*bar)->labels);CHKERRQ(ierr);
ierr = PetscDrawAxisDestroy(&(*bar)->axis);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&(*bar)->win);CHKERRQ(ierr);
ierr = PetscHeaderDestroy(bar);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
static PetscErrorCode PetscDrawRestoreSingleton_X(PetscDraw draw,PetscDraw *sdraw)
{
PetscErrorCode ierr;
PetscDraw_X *sXwin = (PetscDraw_X*)(*sdraw)->data;
PetscFunctionBegin;
XFreeGC(sXwin->disp,sXwin->gc.set);
XCloseDisplay(sXwin->disp);
ierr = PetscDrawDestroy(&(*sdraw)->popup);CHKERRQ(ierr);
ierr = PetscFree((*sdraw)->title);CHKERRQ(ierr);
ierr = PetscFree((*sdraw)->display);CHKERRQ(ierr);
ierr = PetscFree(sXwin->font);CHKERRQ(ierr);
ierr = PetscFree(sXwin);CHKERRQ(ierr);
ierr = PetscHeaderDestroy(sdraw);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
/*@C
PetscDrawHGDestroy - Frees all space taken up by histogram data structure.
Collective over PetscDrawHG
Input Parameter:
. hist - The histogram context
Level: intermediate
.seealso: PetscDrawHGCreate()
@*/
PetscErrorCode PetscDrawHGDestroy(PetscDrawHG *hist)
{
PetscErrorCode ierr;
PetscFunctionBegin;
if (!*hist) PetscFunctionReturn(0);
PetscValidHeaderSpecific(*hist,PETSC_DRAWHG_CLASSID,1);
if (--((PetscObject)(*hist))->refct > 0) {*hist = NULL; PetscFunctionReturn(0);}
ierr = PetscFree((*hist)->bins);CHKERRQ(ierr);
ierr = PetscFree((*hist)->values);CHKERRQ(ierr);
ierr = PetscDrawAxisDestroy(&(*hist)->axis);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&(*hist)->win);CHKERRQ(ierr);
ierr = PetscHeaderDestroy(hist);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
int main(int argc,char **argv)
{
PetscDraw draw;
PetscDrawHG hist;
PetscDrawAxis axis;
PetscErrorCode ierr;
int n = 20,i,x = 0,y = 0,width = 300,height = 300,bins = 8;
PetscInt w = 300,h = 300,nn = 20,b = 8,c = PETSC_DRAW_GREEN;
int color = PETSC_DRAW_GREEN;
const char *xlabel,*ylabel,*toplabel;
PetscReal xd;
PetscTruth flg;
xlabel = "X-axis Label";toplabel = "Top Label";ylabel = "Y-axis Label";
ierr = PetscInitialize(&argc,&argv,(char*)0,help);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(PETSC_NULL,"-width",&w,PETSC_NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(PETSC_NULL,"-height",&h,PETSC_NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(PETSC_NULL,"-n",&nn,PETSC_NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(PETSC_NULL,"-bins",&b,PETSC_NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(PETSC_NULL,"-color",&c,PETSC_NULL);CHKERRQ(ierr);
ierr = PetscOptionsHasName(PETSC_NULL,"-nolabels",&flg);CHKERRQ(ierr);
width = (int) w; height = (int)h; n = (int)nn; bins = (int) b; color = (int) c;
if (flg) {
xlabel = (char *)0; toplabel = (char *)0;
}
/* ierr = PetscDrawOpenX(PETSC_COMM_SELF,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr);*/
ierr = PetscDrawCreate(PETSC_COMM_SELF,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetType(draw,PETSC_DRAW_X);CHKERRQ(ierr);
ierr = PetscDrawHGCreate(draw,bins,&hist);CHKERRQ(ierr);
ierr = PetscDrawHGGetAxis(hist,&axis);CHKERRQ(ierr);
ierr = PetscDrawAxisSetColors(axis,PETSC_DRAW_BLACK,PETSC_DRAW_RED,PETSC_DRAW_BLUE);CHKERRQ(ierr);
ierr = PetscDrawAxisSetLabels(axis,toplabel,xlabel,ylabel);CHKERRQ(ierr);
for (i=0; i<n ; i++) {
xd = (PetscReal)(i - 5);
ierr = PetscDrawHGAddValue(hist,xd*xd);CHKERRQ(ierr);
}
ierr = PetscDrawHGSetColor(hist,color);CHKERRQ(ierr);
ierr = PetscDrawHGDraw(hist);CHKERRQ(ierr);
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawHGDestroy(hist);CHKERRQ(ierr);
ierr = PetscDrawDestroy(draw);CHKERRQ(ierr);
ierr = PetscFinalize();CHKERRQ(ierr);
return 0;
}
/*@C
KSPMonitorLGResidualNormCreate - Creates a line graph context for use with
KSP to monitor convergence of preconditioned residual norms.
Collective on KSP
Input Parameters:
+ comm - communicator context
. host - the X display to open, or null for the local machine
. label - the title to put in the title bar
. x, y - the screen coordinates of the upper left coordinate of
the window
- m, n - the screen width and height in pixels
Output Parameter:
. lgctx - the drawing context
Options Database Key:
. -ksp_monitor_lg_residualnorm - Sets line graph monitor
Notes:
Use PetscDrawLGDestroy() to destroy this line graph.
Level: intermediate
.keywords: KSP, monitor, line graph, residual, create
.seealso: KSPMonitorSet(), KSPMonitorLGTrueResidualCreate()
@*/
PetscErrorCode KSPMonitorLGResidualNormCreate(MPI_Comm comm,const char host[],const char label[],int x,int y,int m,int n,PetscDrawLG *lgctx)
{
PetscDraw draw;
PetscErrorCode ierr;
PetscDrawAxis axis;
PetscDrawLG lg;
PetscFunctionBegin;
ierr = PetscDrawCreate(comm,host,label,x,y,m,n,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscDrawLGCreate(draw,1,&lg);CHKERRQ(ierr);
ierr = PetscDrawLGSetFromOptions(lg);CHKERRQ(ierr);
ierr = PetscDrawLGGetAxis(lg,&axis);CHKERRQ(ierr);
ierr = PetscDrawAxisSetLabels(axis,"Convergence","Iteration","Residual Norm");CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
*lgctx = lg;
PetscFunctionReturn(0);
}
int main(int argc,char **argv)
{
PetscDraw draw;
PetscErrorCode ierr;
ierr = PetscInitialize(&argc,&argv,(char*)0,help);CHKERRQ(ierr);
ierr = PetscDrawCreate(PETSC_COMM_SELF,0,"Title",0,0,256,256,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscDrawBoxedString(draw,.5,.5,PETSC_DRAW_BLUE,PETSC_DRAW_RED,"Greetings",NULL,NULL);CHKERRQ(ierr);
ierr = PetscDrawBoxedString(draw,.25,.75,PETSC_DRAW_BLUE,PETSC_DRAW_RED,"How\nare\nyou?",NULL,NULL);CHKERRQ(ierr);
ierr = PetscDrawBoxedString(draw,.25,.25,PETSC_DRAW_GREEN,PETSC_DRAW_RED,"Long line followed by a very\nshort line",NULL,NULL);CHKERRQ(ierr);
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscFinalize();
return 0;
}
static PetscErrorCode PetscViewerDestroy_Draw(PetscViewer v)
{
PetscErrorCode ierr;
PetscInt i;
PetscViewer_Draw *vdraw = (PetscViewer_Draw*)v->data;
PetscFunctionBegin;
if (vdraw->singleton_made) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ORDER,"Destroying PetscViewer without first restoring singleton");
for (i=0; i<vdraw->draw_max; i++) {
ierr = PetscDrawAxisDestroy(&vdraw->drawaxis[i]);CHKERRQ(ierr);
ierr = PetscDrawLGDestroy(&vdraw->drawlg[i]);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&vdraw->draw[i]);CHKERRQ(ierr);
}
ierr = PetscFree(vdraw->display);CHKERRQ(ierr);
ierr = PetscFree(vdraw->title);CHKERRQ(ierr);
ierr = PetscFree3(vdraw->draw,vdraw->drawlg,vdraw->drawaxis);CHKERRQ(ierr);
ierr = PetscFree(vdraw->bounds);CHKERRQ(ierr);
ierr = PetscFree(vdraw->drawtype);CHKERRQ(ierr);
ierr = PetscFree(v->data);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
int main(int argc,char **argv)
{
PetscDraw draw;
PetscDrawBar bar;
PetscDrawAxis axis;
PetscErrorCode ierr;
int color = PETSC_DRAW_ROTATE;
const char *xlabel,*ylabel,*toplabel;
const PetscReal values[] = {.3, .5, .05, .11};
const char *const labels[] = {"A","B","C","D",NULL};
PetscReal limits[2] = {0,0.55}; PetscInt nlimits = 2;
PetscBool nolabels,setlimits;
xlabel = "X-axis Label"; toplabel = "Top Label"; ylabel = "Y-axis Label";
ierr = PetscInitialize(&argc,&argv,NULL,help);CHKERRQ(ierr);
ierr = PetscOptionsHasName(NULL,NULL,"-nolabels",&nolabels);CHKERRQ(ierr);
if (nolabels) { xlabel = NULL; ylabel = NULL; toplabel = NULL; }
ierr = PetscOptionsGetRealArray(NULL,NULL,"-limits",limits,&nlimits,&setlimits);CHKERRQ(ierr);
ierr = PetscDrawCreate(PETSC_COMM_WORLD,NULL,"Title",PETSC_DECIDE,PETSC_DECIDE,400,300,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscDrawBarCreate(draw,&bar);CHKERRQ(ierr);
ierr = PetscDrawBarGetAxis(bar,&axis);CHKERRQ(ierr);
ierr = PetscDrawAxisSetColors(axis,PETSC_DRAW_BLACK,PETSC_DRAW_RED,PETSC_DRAW_BLUE);CHKERRQ(ierr);
ierr = PetscDrawAxisSetLabels(axis,toplabel,xlabel,ylabel);CHKERRQ(ierr);
ierr = PetscDrawBarSetColor(bar,color);CHKERRQ(ierr);
ierr = PetscDrawBarSetFromOptions(bar);CHKERRQ(ierr);
if (setlimits) {ierr = PetscDrawBarSetLimits(bar,limits[0],limits[1]);CHKERRQ(ierr);}
ierr = PetscDrawBarSetData(bar,4,values,labels);CHKERRQ(ierr);
ierr = PetscDrawBarDraw(bar);CHKERRQ(ierr);
ierr = PetscDrawBarSave(bar);CHKERRQ(ierr);
ierr = PetscDrawBarDestroy(&bar);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscFinalize();
return ierr;
}
/*@C
KSPMonitorSNESLGResidualNormCreate - Creates a line graph context for use with
KSP to monitor convergence of preconditioned residual norms.
Collective on KSP
Input Parameters:
+ comm - communicator context
. host - the X display to open, or null for the local machine
. label - the title to put in the title bar
. x, y - the screen coordinates of the upper left coordinate of
the window
- m, n - the screen width and height in pixels
Output Parameter:
. draw - the drawing context
Options Database Key:
. -ksp_monitor_lg_residualnorm - Sets line graph monitor
Notes:
Use KSPMonitorSNESLGResidualNormDestroy() to destroy this line graph; do not use PetscDrawLGDestroy().
Level: intermediate
.keywords: KSP, monitor, line graph, residual, create
.seealso: KSPMonitorSNESLGResidualNormDestroy(), KSPMonitorSet(), KSPMonitorSNESLGTrueResidualCreate()
@*/
PetscErrorCode KSPMonitorSNESLGResidualNormCreate(MPI_Comm comm,const char host[],const char label[],int x,int y,int m,int n,PetscObject **objs)
{
PetscDraw draw;
PetscErrorCode ierr;
PetscDrawAxis axis;
PetscDrawLG lg;
const char *names[] = {"Linear residual","Nonlinear residual"};
PetscFunctionBegin;
ierr = PetscDrawCreate(comm,host,label,x,y,m,n,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscDrawLGCreate(draw,2,&lg);CHKERRQ(ierr);
ierr = PetscDrawLGSetLegend(lg,names);CHKERRQ(ierr);
ierr = PetscDrawLGSetFromOptions(lg);CHKERRQ(ierr);
ierr = PetscDrawLGGetAxis(lg,&axis);CHKERRQ(ierr);
ierr = PetscDrawAxisSetLabels(axis,"Convergence of Residual Norm","Iteration","Residual Norm");CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscMalloc1(2,objs);CHKERRQ(ierr);
(*objs)[1] = (PetscObject)lg;
PetscFunctionReturn(0);
}
/*@
PetscDrawLGDestroy - Frees all space taken up by line graph data structure.
Collective on PetscDrawLG
Input Parameter:
. lg - the line graph context
Level: intermediate
.seealso: PetscDrawLGCreate()
@*/
PetscErrorCode PetscDrawLGDestroy(PetscDrawLG *lg)
{
PetscErrorCode ierr;
PetscInt i;
PetscFunctionBegin;
if (!*lg) PetscFunctionReturn(0);
PetscValidHeaderSpecific(*lg,PETSC_DRAWLG_CLASSID,1);
if (--((PetscObject)(*lg))->refct > 0) {*lg = NULL; PetscFunctionReturn(0);}
if ((*lg)->legend) {
for (i=0; i<(*lg)->dim; i++) {
ierr = PetscFree((*lg)->legend[i]);CHKERRQ(ierr);
}
ierr = PetscFree((*lg)->legend);CHKERRQ(ierr);
}
ierr = PetscFree((*lg)->colors);CHKERRQ(ierr);
ierr = PetscFree2((*lg)->x,(*lg)->y);CHKERRQ(ierr);
ierr = PetscDrawAxisDestroy(&(*lg)->axis);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&(*lg)->win);CHKERRQ(ierr);
ierr = PetscHeaderDestroy(lg);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
int main(int argc,char **argv)
{
PetscDraw draw;
PetscMPIInt size,rank;
PetscErrorCode ierr;
int x = 0,y = 0,width = 256,height = 256,i;
ierr = PetscInitialize(&argc,&argv,NULL,help);CHKERRQ(ierr);
ierr = PetscDrawCreate(PETSC_COMM_WORLD,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr);
ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr);
for (i=rank; i<height; i+=size) {
PetscReal y = ((PetscReal)i)/(height-1);
ierr = PetscDrawLine(draw,0.0,y,1.0,y,i%256);CHKERRQ(ierr);
}
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawPause(draw);CHKERRQ(ierr);
ierr = PetscDrawSave(draw);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscFinalize();
return ierr;
}
/*
Run with -build_twosided allreduce -pc_type bjacobi -sub_pc_type lu -q 16 -ksp_rtol 1.e-34 (or 1.e-14 for double precision)
-q <q> number of spectral elements to use
-N <N> maximum number of GLL points per element
*/
int main(int argc,char **args)
{
PetscErrorCode ierr;
PetscGLL gll;
PetscInt N = 80,n,q = 8,xs,xn,j,l;
PetscReal **A;
Mat K;
KSP ksp;
PC pc;
Vec x,b;
PetscInt *rows;
PetscReal norm,xc,yc,h;
PetscScalar *f;
PetscDraw draw;
PetscDrawLG lg;
PetscDrawAxis axis;
DM da;
PetscMPIInt rank,size;
ierr = PetscInitialize(&argc,&args,NULL,NULL);if (ierr) return ierr;
ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr);
ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL);CHKERRQ(ierr);
ierr = PetscOptionsGetInt(NULL,NULL,"-q",&q,NULL);CHKERRQ(ierr);
ierr = PetscDrawCreate(PETSC_COMM_WORLD,NULL,"Log(Error norm) vs Number of GLL points",0,0,500,500,&draw);CHKERRQ(ierr);
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscDrawLGCreate(draw,1,&lg);CHKERRQ(ierr);
ierr = PetscDrawLGSetUseMarkers(lg,PETSC_TRUE);CHKERRQ(ierr);
ierr = PetscDrawLGGetAxis(lg,&axis);CHKERRQ(ierr);
ierr = PetscDrawAxisSetLabels(axis,NULL,"Number of GLL points","Log(Error Norm)");CHKERRQ(ierr);
for (n=4; n<N; n+=2) {
/*
da contains the information about the parallel layout of the elements
*/
ierr = DMDACreate1d(PETSC_COMM_WORLD,DM_BOUNDARY_NONE,q*(n-1)+1,1,1,NULL,&da);CHKERRQ(ierr);
ierr = DMSetFromOptions(da);CHKERRQ(ierr);
ierr = DMSetUp(da);CHKERRQ(ierr);
ierr = DMDAGetInfo(da,NULL,&q,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);CHKERRQ(ierr);
q = (q-1)/(n-1); /* number of spectral elements */
/*
gll simply contains the GLL node and weight values
*/
ierr = PetscGLLCreate(n,PETSCGLL_VIA_LINEARALGEBRA,&gll);CHKERRQ(ierr);
ierr = DMDASetGLLCoordinates(da,&gll);CHKERRQ(ierr);
/*
Creates the element stiffness matrix for the given gll
*/
ierr = PetscGLLElementLaplacianCreate(&gll,&A);CHKERRQ(ierr);
/*
Scale the element stiffness and weights by the size of the element
*/
h = 2.0/q;
for (j=0; j<n; j++) {
gll.weights[j] *= .5*h;
for (l=0; l<n; l++) {
A[j][l] = 2.*A[j][l]/h;
}
}
/*
Create the global stiffness matrix and add the element stiffness for each local element
*/
ierr = DMCreateMatrix(da,&K);CHKERRQ(ierr);
ierr = MatSetOption(K,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE);CHKERRQ(ierr);
ierr = DMDAGetCorners(da,&xs,NULL,NULL,&xn,NULL,NULL);CHKERRQ(ierr);
xs = xs/(n-1);
xn = xn/(n-1);
ierr = PetscMalloc1(n,&rows);CHKERRQ(ierr);
/*
loop over local elements
*/
for (j=xs; j<xs+xn; j++) {
for (l=0; l<n; l++) rows[l] = j*(n-1)+l;
ierr = MatSetValues(K,n,rows,n,rows,&A[0][0],ADD_VALUES);CHKERRQ(ierr);
}
ierr = MatAssemblyBegin(K,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
ierr = MatAssemblyEnd(K,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
ierr = MatCreateVecs(K,&x,&b);CHKERRQ(ierr);
ierr = ComputeRhs(da,&gll,b);CHKERRQ(ierr);
/*
Replace the first and last rows/columns of the matrix with the identity to obtain the zero Dirichlet boundary conditions
*/
rows[0] = 0;
rows[1] = q*(n-1);
ierr = MatZeroRowsColumns(K,2,rows,1.0,x,b);CHKERRQ(ierr);
ierr = PetscFree(rows);CHKERRQ(ierr);
ierr = KSPCreate(PETSC_COMM_WORLD,&ksp);CHKERRQ(ierr);
ierr = KSPSetOperators(ksp,K,K);CHKERRQ(ierr);
ierr = KSPGetPC(ksp,&pc);CHKERRQ(ierr);
ierr = PCSetType(pc,PCLU);CHKERRQ(ierr);
ierr = KSPSetFromOptions(ksp);CHKERRQ(ierr);
ierr = KSPSolve(ksp,b,x);CHKERRQ(ierr);
/* compute the error to the continium problem */
ierr = ComputeSolution(da,&gll,b);CHKERRQ(ierr);
ierr = VecAXPY(x,-1.0,b);CHKERRQ(ierr);
/* compute the L^2 norm of the error */
ierr = VecGetArray(x,&f);CHKERRQ(ierr);
ierr = PetscGLLIntegrate(&gll,f,&norm);CHKERRQ(ierr);
ierr = VecRestoreArray(x,&f);CHKERRQ(ierr);
norm = PetscSqrtReal(norm);
ierr = PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD,"L^2 norm of the error %D %g\n",n,(double)norm);CHKERRQ(ierr);
if (n > 10 && norm > 1.e-8) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_PLIB,"Slower convergence than expected");
xc = (PetscReal)n;
yc = PetscLog10Real(norm);
ierr = PetscDrawLGAddPoint(lg,&xc,&yc);CHKERRQ(ierr);
ierr = PetscDrawLGDraw(lg);CHKERRQ(ierr);
ierr = VecDestroy(&b);CHKERRQ(ierr);
ierr = VecDestroy(&x);CHKERRQ(ierr);
ierr = KSPDestroy(&ksp);CHKERRQ(ierr);
ierr = MatDestroy(&K);CHKERRQ(ierr);
ierr = PetscGLLElementLaplacianDestroy(&gll,&A);CHKERRQ(ierr);
ierr = PetscGLLDestroy(&gll);CHKERRQ(ierr);
ierr = DMDestroy(&da);CHKERRQ(ierr);
}
ierr = PetscDrawLGDestroy(&lg);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscFinalize();
return ierr;
}
int main(int argc,char **argv)
{
PetscDraw draw;
PetscErrorCode ierr;
int i,j,w,h;
int k = PETSC_DRAW_BLACK;
int r = PETSC_DRAW_RED;
int g = PETSC_DRAW_GREEN;
int b = PETSC_DRAW_BLUE;
int y = PETSC_DRAW_YELLOW;
int c0 = PETSC_DRAW_BASIC_COLORS;
int c2 = 255;
int c1 = (c0+c2)/2;
ierr = PetscInitialize(&argc,&argv,NULL,help);CHKERRQ(ierr);
ierr = PetscDrawCreate(PETSC_COMM_WORLD,0,"Draw Example",PETSC_DECIDE,PETSC_DECIDE,101,101,&draw);CHKERRQ(ierr);
/*ierr = PetscDrawSetPause(draw,2.0);CHKERRQ(ierr);*/
ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr);
ierr = PetscDrawCheckResizedWindow(draw);CHKERRQ(ierr);
ierr = PetscDrawGetWindowSize(draw,&w,&h);CHKERRQ(ierr);
ierr = PetscDrawSetCoordinates(draw,0,0,--w,--h);CHKERRQ(ierr);
ierr = PetscDrawClear(draw);CHKERRQ(ierr);
/* one-pixel lines in the window corners */
ierr = PetscDrawLine(draw,0,0,0,0,r);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,w,0,w,0,r);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,0,h,0,h,r);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,w,h,w,h,r);CHKERRQ(ierr);
/* border lines with two pixels from borders */
ierr = PetscDrawLine(draw,0+2,0,w-2,0,k);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,0+2,h,w-2,h,k);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,0,0+2,0,h-2,k);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,w,0+2,w,h-2,k);CHKERRQ(ierr);
/* oblique lines */
ierr = PetscDrawLine(draw,0+2,h/2,w-2,h-2,b);CHKERRQ(ierr);
ierr = PetscDrawLine(draw,0+1,h-1,w-1,0+1,b);CHKERRQ(ierr);
/* vertical up and down arrow, two pixels from borders */
ierr = PetscDrawArrow(draw,1*w/4,0+2,1*w/4,h-2,g);CHKERRQ(ierr);
ierr = PetscDrawArrow(draw,3*w/4,h-2,3*w/4,0+2,g);CHKERRQ(ierr);
/* horizontal right and left arrow, two pixels from borders */
ierr = PetscDrawArrow(draw,0+2,3*h/4,w-2,3*h/4,g);CHKERRQ(ierr);
ierr = PetscDrawArrow(draw,w-2,1*h/4,0+2,1*h/4,g);CHKERRQ(ierr);
/* flush, save, and pause */
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawSave(draw);CHKERRQ(ierr);
ierr = PetscDrawPause(draw);CHKERRQ(ierr);
ierr = PetscDrawCheckResizedWindow(draw);CHKERRQ(ierr);
ierr = PetscDrawGetWindowSize(draw,&w,&h);CHKERRQ(ierr);
ierr = PetscDrawSetCoordinates(draw,0,0,--w,--h);CHKERRQ(ierr);
ierr = PetscDrawClear(draw);CHKERRQ(ierr);
/* one-pixel rectangles in the window corners */
ierr = PetscDrawRectangle(draw,0,0,0,0,k,k,k,k);CHKERRQ(ierr);
ierr = PetscDrawRectangle(draw,w,0,w,0,k,k,k,k);CHKERRQ(ierr);
ierr = PetscDrawRectangle(draw,0,h,0,h,k,k,k,k);CHKERRQ(ierr);
ierr = PetscDrawRectangle(draw,w,h,w,h,k,k,k,k);CHKERRQ(ierr);
/* border rectangles with two pixels from borders */
ierr = PetscDrawRectangle(draw,0+2,0,w-2,0,k,k,k,k);CHKERRQ(ierr);
ierr = PetscDrawRectangle(draw,0+2,h,w-2,h,k,k,k,k);CHKERRQ(ierr);
ierr = PetscDrawRectangle(draw,0,0+2,0,h-2,k,k,k,k);CHKERRQ(ierr);
ierr = PetscDrawRectangle(draw,w,0+2,w,h-2,k,k,k,k);CHKERRQ(ierr);
/* more rectangles */
ierr = PetscDrawRectangle(draw,0+2,0+2,w/2-1,h/2-1,b,b,b,b);CHKERRQ(ierr);
ierr = PetscDrawRectangle(draw,0+2,h/2+1,w/2-1,h-2,r,r,r,r);CHKERRQ(ierr);
ierr = PetscDrawRectangle(draw,w/2+1,h/2+1,w-2,h-2,g,g,g,g);CHKERRQ(ierr);
ierr = PetscDrawRectangle(draw,w/2+1,0+2,w-2,h/2-1,y,y,y,y);CHKERRQ(ierr);
/* flush, save, and pause */
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawSave(draw);CHKERRQ(ierr);
ierr = PetscDrawPause(draw);CHKERRQ(ierr);
ierr = PetscDrawCheckResizedWindow(draw);CHKERRQ(ierr);
ierr = PetscDrawGetWindowSize(draw,&w,&h);CHKERRQ(ierr);
ierr = PetscDrawSetCoordinates(draw,0,0,--w,--h);CHKERRQ(ierr);
ierr = PetscDrawClear(draw);CHKERRQ(ierr);
/* interpolated triangles, one pixel from borders */
ierr = PetscDrawTriangle(draw,0+1,0+1,w-1,0+1,w-1,h-1,c0,c1,c2);CHKERRQ(ierr);
ierr = PetscDrawTriangle(draw,0+1,0+1,0+1,h-1,w-1,h-1,c0,c1,c2);CHKERRQ(ierr);
/* interpolated triangle, oblique, inside canvas */
ierr = PetscDrawTriangle(draw,w/4,h/4,w/2,3*h/4,3*w/4,h/2,c2,c1,c0);CHKERRQ(ierr);
/* flush, save, and pause */
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawSave(draw);CHKERRQ(ierr);
ierr = PetscDrawPause(draw);CHKERRQ(ierr);
ierr = PetscDrawCheckResizedWindow(draw);CHKERRQ(ierr);
ierr = PetscDrawGetWindowSize(draw,&w,&h);CHKERRQ(ierr);
ierr = PetscDrawSetCoordinates(draw,0,0,--w,--h);CHKERRQ(ierr);
ierr = PetscDrawClear(draw);CHKERRQ(ierr);
/* circles and ellipses */
ierr = PetscDrawEllipse(draw,w/2,h/2,w-1,h-1,r);CHKERRQ(ierr);
ierr = PetscDrawEllipse(draw,w,h/2,w/2,h,g);CHKERRQ(ierr);
ierr = PetscDrawEllipse(draw,0,0,w,h/2,b);CHKERRQ(ierr);
ierr = PetscDrawEllipse(draw,w/4,3*h/4,w/2,h/4,y);CHKERRQ(ierr);
ierr = PetscDrawCoordinateToPixel(draw,w/2,h/2,&i,&j);CHKERRQ(ierr);
ierr = PetscDrawPointPixel(draw,i,j,k);CHKERRQ(ierr);
/* flush, save, and pause */
ierr = PetscDrawFlush(draw);CHKERRQ(ierr);
ierr = PetscDrawSave(draw);CHKERRQ(ierr);
ierr = PetscDrawPause(draw);CHKERRQ(ierr);
ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr);
ierr = PetscFinalize();
return 0;
}
void PETSC_STDCALL petscdrawdestroy_(PetscDraw *draw, int *__ierr ){
*__ierr = PetscDrawDestroy(draw);
}