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; }
/* This routine is not parallel */ PetscErrorCode MyMonitor(TS ts,PetscInt step,PetscReal time,Vec U,void *ptr) { UserCtx *ctx = (UserCtx*)ptr; PetscDrawLG lg; PetscErrorCode ierr; PetscScalar *u; PetscInt Mx,i,xs,xm,cnt; PetscReal x,y,hx,pause,sx,len,max,xx[2],yy[2]; PetscDraw draw; Vec localU; DM da; int colors[] = {PETSC_DRAW_YELLOW,PETSC_DRAW_RED,PETSC_DRAW_BLUE}; const char*const legend[] = {"-kappa (\\grad u,\\grad u)","(1 - u^2)^2"}; PetscDrawAxis axis; PetscDrawViewPorts *ports; PetscReal vbounds[] = {-1.1,1.1}; PetscFunctionBegin; ierr = PetscViewerDrawSetBounds(PETSC_VIEWER_DRAW_(PETSC_COMM_WORLD),1,vbounds);CHKERRQ(ierr); ierr = PetscViewerDrawResize(PETSC_VIEWER_DRAW_(PETSC_COMM_WORLD),1200,800);CHKERRQ(ierr); ierr = TSGetDM(ts,&da);CHKERRQ(ierr); ierr = DMGetLocalVector(da,&localU);CHKERRQ(ierr); ierr = DMDAGetInfo(da,PETSC_IGNORE,&Mx,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE,PETSC_IGNORE);CHKERRQ(ierr); ierr = DMDAGetCorners(da,&xs,NULL,NULL,&xm,NULL,NULL);CHKERRQ(ierr); hx = 1.0/(PetscReal)Mx; sx = 1.0/(hx*hx); ierr = DMGlobalToLocalBegin(da,U,INSERT_VALUES,localU);CHKERRQ(ierr); ierr = DMGlobalToLocalEnd(da,U,INSERT_VALUES,localU);CHKERRQ(ierr); ierr = DMDAVecGetArrayRead(da,localU,&u);CHKERRQ(ierr); ierr = PetscViewerDrawGetDrawLG(PETSC_VIEWER_DRAW_(PETSC_COMM_WORLD),1,&lg);CHKERRQ(ierr); ierr = PetscDrawLGGetDraw(lg,&draw);CHKERRQ(ierr); ierr = PetscDrawCheckResizedWindow(draw);CHKERRQ(ierr); if (!ctx->ports) { ierr = PetscDrawViewPortsCreateRect(draw,1,3,&ctx->ports);CHKERRQ(ierr); } ports = ctx->ports; ierr = PetscDrawLGGetAxis(lg,&axis);CHKERRQ(ierr); ierr = PetscDrawLGReset(lg);CHKERRQ(ierr); xx[0] = 0.0; xx[1] = 1.0; cnt = 2; ierr = PetscOptionsGetRealArray(NULL,NULL,"-zoom",xx,&cnt,NULL);CHKERRQ(ierr); xs = xx[0]/hx; xm = (xx[1] - xx[0])/hx; /* Plot the energies */ ierr = PetscDrawLGSetDimension(lg,1 + (ctx->allencahn ? 1 : 0));CHKERRQ(ierr); ierr = PetscDrawLGSetColors(lg,colors+1);CHKERRQ(ierr); ierr = PetscDrawViewPortsSet(ports,2);CHKERRQ(ierr); x = hx*xs; for (i=xs; i<xs+xm; i++) { xx[0] = xx[1] = x; yy[0] = PetscRealPart(.25*ctx->kappa*(u[i-1] - u[i+1])*(u[i-1] - u[i+1])*sx); if (ctx->allencahn) yy[1] = .25*PetscRealPart((1. - u[i]*u[i])*(1. - u[i]*u[i])); ierr = PetscDrawLGAddPoint(lg,xx,yy);CHKERRQ(ierr); x += hx; } ierr = PetscDrawGetPause(draw,&pause);CHKERRQ(ierr); ierr = PetscDrawSetPause(draw,0.0);CHKERRQ(ierr); ierr = PetscDrawAxisSetLabels(axis,"Energy","","");CHKERRQ(ierr); ierr = PetscDrawLGSetLegend(lg,legend);CHKERRQ(ierr); ierr = PetscDrawLGDraw(lg);CHKERRQ(ierr); /* Plot the forces */ ierr = PetscDrawViewPortsSet(ports,1);CHKERRQ(ierr); ierr = PetscDrawLGReset(lg);CHKERRQ(ierr); x = xs*hx;; max = 0.; for (i=xs; i<xs+xm; i++) { xx[0] = xx[1] = x; yy[0] = PetscRealPart(ctx->kappa*(u[i-1] + u[i+1] - 2.0*u[i])*sx); max = PetscMax(max,PetscAbs(yy[0])); if (ctx->allencahn) { yy[1] = PetscRealPart(u[i] - u[i]*u[i]*u[i]); max = PetscMax(max,PetscAbs(yy[1])); } ierr = PetscDrawLGAddPoint(lg,xx,yy);CHKERRQ(ierr); x += hx; } ierr = PetscDrawAxisSetLabels(axis,"Right hand side","","");CHKERRQ(ierr); ierr = PetscDrawLGSetLegend(lg,NULL);CHKERRQ(ierr); ierr = PetscDrawLGDraw(lg);CHKERRQ(ierr); /* Plot the solution */ ierr = PetscDrawLGSetDimension(lg,1);CHKERRQ(ierr); ierr = PetscDrawViewPortsSet(ports,0);CHKERRQ(ierr); ierr = PetscDrawLGReset(lg);CHKERRQ(ierr); x = hx*xs; ierr = PetscDrawLGSetLimits(lg,x,x+(xm-1)*hx,-1.1,1.1);CHKERRQ(ierr); ierr = PetscDrawLGSetColors(lg,colors);CHKERRQ(ierr); for (i=xs; i<xs+xm; i++) { xx[0] = x; yy[0] = PetscRealPart(u[i]); ierr = PetscDrawLGAddPoint(lg,xx,yy);CHKERRQ(ierr); x += hx; } ierr = PetscDrawAxisSetLabels(axis,"Solution","","");CHKERRQ(ierr); ierr = PetscDrawLGDraw(lg);CHKERRQ(ierr); /* Print the forces as arrows on the solution */ x = hx*xs; cnt = xm/60; cnt = (!cnt) ? 1 : cnt; for (i=xs; i<xs+xm; i += cnt) { y = PetscRealPart(u[i]); len = .5*PetscRealPart(ctx->kappa*(u[i-1] + u[i+1] - 2.0*u[i])*sx)/max; ierr = PetscDrawArrow(draw,x,y,x,y+len,PETSC_DRAW_RED);CHKERRQ(ierr); if (ctx->allencahn) { len = .5*PetscRealPart(u[i] - u[i]*u[i]*u[i])/max; ierr = PetscDrawArrow(draw,x,y,x,y+len,PETSC_DRAW_BLUE);CHKERRQ(ierr); } x += cnt*hx; } ierr = DMDAVecRestoreArrayRead(da,localU,&x);CHKERRQ(ierr); ierr = DMRestoreLocalVector(da,&localU);CHKERRQ(ierr); ierr = PetscDrawStringSetSize(draw,.2,.2);CHKERRQ(ierr); ierr = PetscDrawFlush(draw);CHKERRQ(ierr); ierr = PetscDrawSetPause(draw,pause);CHKERRQ(ierr); ierr = PetscDrawPause(draw);CHKERRQ(ierr); PetscFunctionReturn(0); }
PETSC_EXTERN void PETSC_STDCALL petscdrawarrow_(PetscDraw draw,PetscReal *xl,PetscReal *yl,PetscReal *xr,PetscReal *yr,int *cl, int *__ierr ) { *__ierr = PetscDrawArrow( (PetscDraw)PetscToPointer((draw) ),*xl,*yl,*xr,*yr,*cl); }