Actual source code: dviewp.c

petsc-master 2019-09-16
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  2: /*
  3:        Provides the calling sequences for all the basic PetscDraw routines.
  4: */
  5:  #include <petsc/private/drawimpl.h>

  7: /*@
  8:    PetscDrawSetViewPort - Sets the portion of the window (page) to which draw
  9:    routines will write.

 11:    Collective on PetscDraw

 13:    Input Parameters:
 14: +  xl,yl,xr,yr - upper right and lower left corners of subwindow
 15:                  These numbers must always be between 0.0 and 1.0.
 16:                  Lower left corner is (0,0).
 17: -  draw - the drawing context

 19:    Level: advanced


 22: @*/
 23: PetscErrorCode  PetscDrawSetViewPort(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr)
 24: {

 29:   if (xl < 0.0 || xr > 1.0 || yl < 0.0 || yr > 1.0 || xr <= xl || yr <= yl) SETERRQ4(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"ViewPort values must be >= 0 and <= 1: Instead %g %g %g %g",(double)xl,(double)yl,(double)xr,(double)yr);
 30:   draw->port_xl = xl; draw->port_yl = yl;
 31:   draw->port_xr = xr; draw->port_yr = yr;
 32:   if (draw->ops->setviewport) {
 33:     (*draw->ops->setviewport)(draw,xl,yl,xr,yr);
 34:   }
 35:   return(0);
 36: }

 38: /*@
 39:    PetscDrawGetViewPort - Gets the portion of the window (page) to which draw
 40:    routines will write.

 42:    Collective on PetscDraw

 44:    Input Parameter:
 45: .  draw - the drawing context

 47:    Output Parameter:
 48: .  xl,yl,xr,yr - upper right and lower left corners of subwindow
 49:                  These numbers must always be between 0.0 and 1.0.
 50:                  Lower left corner is (0,0).

 52:    Level: advanced


 55: @*/
 56: PetscErrorCode  PetscDrawGetViewPort(PetscDraw draw,PetscReal *xl,PetscReal *yl,PetscReal *xr,PetscReal *yr)
 57: {
 64:   *xl = draw->port_xl;
 65:   *yl = draw->port_yl;
 66:   *xr = draw->port_xr;
 67:   *yr = draw->port_yr;
 68:   return(0);
 69: }

 71: /*@
 72:    PetscDrawSplitViewPort - Splits a window shared by several processes into smaller
 73:    view ports. One for each process.

 75:    Collective on PetscDraw

 77:    Input Parameter:
 78: .  draw - the drawing context

 80:    Level: advanced

 82: .seealso: PetscDrawDivideViewPort(), PetscDrawSetViewPort()

 84: @*/
 85: PetscErrorCode  PetscDrawSplitViewPort(PetscDraw draw)
 86: {
 88:   PetscMPIInt    rank,size;
 89:   PetscInt       n;
 90:   PetscBool      isnull;
 91:   PetscReal      xl,xr,yl,yr,h;

 95:   PetscDrawIsNull(draw,&isnull);
 96:   if (isnull) return(0);
 97:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
 98:   MPI_Comm_size(PetscObjectComm((PetscObject)draw),&size);

100:   n = (PetscInt)(.1 + PetscSqrtReal((PetscReal)size));
101:   while (n*n < size) n++;

103:   h  = 1.0/n;
104:   xl = (rank % n)*h;
105:   xr = xl + h;
106:   yl = (rank / n)*h;
107:   yr = yl + h;

109:   PetscDrawCollectiveBegin(draw);
110:   PetscDrawLine(draw,xl,yl,xl,yr,PETSC_DRAW_BLACK);
111:   PetscDrawLine(draw,xl,yr,xr,yr,PETSC_DRAW_BLACK);
112:   PetscDrawLine(draw,xr,yr,xr,yl,PETSC_DRAW_BLACK);
113:   PetscDrawLine(draw,xr,yl,xl,yl,PETSC_DRAW_BLACK);
114:   PetscDrawCollectiveEnd(draw);
115:   PetscDrawFlush(draw);

117:   draw->port_xl = xl + .05*h;
118:   draw->port_xr = xr - .05*h;
119:   draw->port_yl = yl + .05*h;
120:   draw->port_yr = yr - .05*h;

122:   if (draw->ops->setviewport) {
123:      (*draw->ops->setviewport)(draw,xl,yl,xr,yr);
124:   }
125:   return(0);
126: }

128: /*@C
129:    PetscDrawViewPortsCreate - Splits a window into smaller view ports. Each processor shares all the viewports.

131:    Collective on PetscDraw

133:    Input Parameters:
134: +  draw - the drawing context
135: -  nports - the number of ports

137:    Output Parameter:
138: .  ports - a PetscDrawViewPorts context (C structure)

140:    Options Database:
141: .  -draw_ports - display multiple fields in the same window with PetscDrawPorts instead of in seperate windows

143:    Level: advanced

145: .seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsSet(), PetscDrawViewPortsDestroy()

147: @*/
148: PetscErrorCode  PetscDrawViewPortsCreate(PetscDraw draw,PetscInt nports,PetscDrawViewPorts **newports)
149: {
150:   PetscDrawViewPorts *ports;
151:   PetscInt           i,n;
152:   PetscBool          isnull;
153:   PetscMPIInt        rank;
154:   PetscReal          *xl,*xr,*yl,*yr,h;
155:   PetscErrorCode     ierr;

159:   if (nports < 1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE, "Number of divisions must be positive: %d", nports);
161:   PetscDrawIsNull(draw,&isnull);
162:   if (isnull) {*newports = NULL; return(0);}
163:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

165:   PetscNew(&ports); *newports = ports;
166:   ports->draw = draw;
167:   ports->nports = nports;
168:   PetscObjectReference((PetscObject)draw);
169:   /* save previous drawport of window */
170:   PetscDrawGetViewPort(draw,&ports->port_xl,&ports->port_yl,&ports->port_xr,&ports->port_yr);

172:   n = (PetscInt)(.1 + PetscSqrtReal((PetscReal)nports));
173:   while (n*n < nports) n++;
174:   h = 1.0/n;

176:   PetscMalloc4(n*n,&xl,n*n,&xr,n*n,&yl,n*n,&yr);
177:   ports->xl = xl;
178:   ports->xr = xr;
179:   ports->yl = yl;
180:   ports->yr = yr;

182:   PetscDrawSetCoordinates(draw,0.0,0.0,1.0,1.0);
183:   PetscDrawCollectiveBegin(draw);
184:   for (i=0; i<n*n; i++) {
185:     xl[i] = (i % n)*h;
186:     xr[i] = xl[i] + h;
187:     yl[i] = (i / n)*h;
188:     yr[i] = yl[i] + h;

190:     if (!rank) {
191:       PetscDrawLine(draw,xl[i],yl[i],xl[i],yr[i],PETSC_DRAW_BLACK);
192:       PetscDrawLine(draw,xl[i],yr[i],xr[i],yr[i],PETSC_DRAW_BLACK);
193:       PetscDrawLine(draw,xr[i],yr[i],xr[i],yl[i],PETSC_DRAW_BLACK);
194:       PetscDrawLine(draw,xr[i],yl[i],xl[i],yl[i],PETSC_DRAW_BLACK);
195:     }

197:     xl[i] += .05*h;
198:     xr[i] -= .05*h;
199:     yl[i] += .05*h;
200:     yr[i] -= .05*h;
201:   }
202:   PetscDrawCollectiveEnd(draw);
203:   PetscDrawFlush(draw);
204:   return(0);
205: }

207: /*@C
208:    PetscDrawViewPortsCreateRect - Splits a window into smaller
209:        view ports. Each processor shares all the viewports. The number
210:        of views in the x- and y-directions is specified.

212:    Collective on PetscDraw

214:    Input Parameters:
215: +  draw - the drawing context
216: .  nx - the number of x divisions
217: -  ny - the number of y divisions

219:    Output Parameter:
220: .  ports - a PetscDrawViewPorts context (C structure)

222:    Level: advanced

224: .seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsSet(), PetscDrawViewPortsDestroy()

226: @*/
227: PetscErrorCode  PetscDrawViewPortsCreateRect(PetscDraw draw,PetscInt nx,PetscInt ny,PetscDrawViewPorts **newports)
228: {
229:   PetscDrawViewPorts *ports;
230:   PetscReal          *xl,*xr,*yl,*yr,hx,hy;
231:   PetscInt           i,j,k,n;
232:   PetscBool          isnull;
233:   PetscMPIInt        rank;
234:   PetscErrorCode     ierr;

238:   if ((nx < 1) || (ny < 1)) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE, "Number of divisions must be positive: %d x %d", nx, ny);
240:   PetscDrawIsNull(draw,&isnull);
241:   if (isnull) {*newports = NULL; return(0);}
242:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

244:   n  = nx*ny;
245:   hx = 1.0/nx;
246:   hy = 1.0/ny;
247:   PetscNew(&ports); *newports = ports;
248:   ports->draw = draw;
249:   ports->nports = n;
250:   PetscObjectReference((PetscObject) draw);
251:   /* save previous drawport of window */
252:   PetscDrawGetViewPort(draw,&ports->port_xl,&ports->port_yl,&ports->port_xr,&ports->port_yr);

254:   PetscMalloc4(n,&xl,n,&xr,n,&yl,n,&yr);
255:   ports->xr = xr;
256:   ports->xl = xl;
257:   ports->yl = yl;
258:   ports->yr = yr;

260:   PetscDrawSetCoordinates(draw,0.0,0.0,1.0,1.0);
261:   PetscDrawCollectiveBegin(draw);
262:   for (i = 0; i < nx; i++) {
263:     for (j = 0; j < ny; j++) {
264:       k = j*nx+i;

266:       xl[k] = i*hx;
267:       xr[k] = xl[k] + hx;
268:       yl[k] = j*hy;
269:       yr[k] = yl[k] + hy;

271:       if (!rank) {
272:         PetscDrawLine(draw,xl[k],yl[k],xl[k],yr[k],PETSC_DRAW_BLACK);
273:         PetscDrawLine(draw,xl[k],yr[k],xr[k],yr[k],PETSC_DRAW_BLACK);
274:         PetscDrawLine(draw,xr[k],yr[k],xr[k],yl[k],PETSC_DRAW_BLACK);
275:         PetscDrawLine(draw,xr[k],yl[k],xl[k],yl[k],PETSC_DRAW_BLACK);
276:       }

278:       xl[k] += .05*hx;
279:       xr[k] -= .05*hx;
280:       yl[k] += .05*hy;
281:       yr[k] -= .05*hy;
282:     }
283:   }
284:   PetscDrawCollectiveEnd(draw);
285:   PetscDrawFlush(draw);
286:   return(0);
287: }

289: /*@C
290:    PetscDrawViewPortsDestroy - frees a PetscDrawViewPorts object

292:    Collective on PetscDraw inside PetscDrawViewPorts

294:    Input Parameter:
295: .  ports - the PetscDrawViewPorts object

297:    Level: advanced

299: .seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsSet(), PetscDrawViewPortsCreate()

301: @*/
302: PetscErrorCode  PetscDrawViewPortsDestroy(PetscDrawViewPorts *ports)
303: {

307:   if (!ports) return(0);
309:   /* reset Drawport of Window back to previous value */
310:   PetscDrawSetViewPort(ports->draw,ports->port_xl,ports->port_yl,ports->port_xr,ports->port_yr);
311:   PetscDrawDestroy(&ports->draw);
312:   PetscFree4(ports->xl,ports->xr,ports->yl,ports->yr);
313:   PetscFree(ports);
314:   return(0);
315: }

317: /*@C
318:    PetscDrawViewPortsSet - sets a draw object to use a particular subport

320:    Logically Collective on PetscDraw inside PetscDrawViewPorts

322:    Input Parameter:
323: +  ports - the PetscDrawViewPorts object
324: -  port - the port number, from 0 to nports-1

326:    Level: advanced

328: .seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsDestroy(), PetscDrawViewPortsCreate()

330: @*/
331: PetscErrorCode  PetscDrawViewPortsSet(PetscDrawViewPorts *ports,PetscInt port)
332: {

336:   if (!ports) return(0);
338:   if (port < 0 || port > ports->nports-1) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Port is out of range requested %d from 0 to %d\n",port,ports->nports-1);
339:   PetscDrawSetViewPort(ports->draw,ports->xl[port],ports->yl[port],ports->xr[port],ports->yr[port]);
340:   return(0);
341: }