Actual source code: dviewp.c
1: #include <petsc/private/drawimpl.h>
3: /*@
4: PetscDrawSetViewPort - Sets the portion of the window (page) to which draw
5: routines will write.
7: Collective
9: Input Parameters:
10: + xl - the horizontal coordinate of the lower left corner of the subwindow.
11: . yl - the vertical coordinate of the lower left corner of the subwindow.
12: . xr - the horizontal coordinate of the upper right corner of the subwindow.
13: . yr - the vertical coordinate of the upper right corner of the subwindow.
14: - draw - the drawing context
16: Level: advanced
18: Notes:
19: These numbers must always be between 0.0 and 1.0.
21: Lower left corner is (0,0).
23: .seealso: `PetscDrawGetViewPort()`, `PetscDraw`, `PetscDrawSplitViewPort()`, `PetscDrawViewPortsCreate()`
24: @*/
25: PetscErrorCode PetscDrawSetViewPort(PetscDraw draw, PetscReal xl, PetscReal yl, PetscReal xr, PetscReal yr)
26: {
27: PetscFunctionBegin;
29: PetscCheck(xl >= 0.0 && xr <= 1.0 && yl >= 0.0 && yr <= 1.0 && xr > xl && yr > yl, 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;
31: draw->port_yl = yl;
32: draw->port_xr = xr;
33: draw->port_yr = yr;
34: PetscTryTypeMethod(draw, setviewport, xl, yl, xr, yr);
35: PetscFunctionReturn(PETSC_SUCCESS);
36: }
38: /*@
39: PetscDrawGetViewPort - Gets the portion of the window (page) to which draw
40: routines will write.
42: Collective
44: Input Parameter:
45: . draw - the drawing context
47: Output Parameters:
48: + xl - the horizontal coordinate of the lower left corner of the subwindow.
49: . yl - the vertical coordinate of the lower left corner of the subwindow.
50: . xr - the horizontal coordinate of the upper right corner of the subwindow.
51: - yr - the vertical coordinate of the upper right corner of the subwindow.
53: Level: advanced
55: Notes:
56: These numbers must always be between 0.0 and 1.0.
58: Lower left corner is (0,0).
60: .seealso: `PetscDraw`, `PetscDrawSplitViewPort()`, `PetscDrawSetViewPort()`
61: @*/
62: PetscErrorCode PetscDrawGetViewPort(PetscDraw draw, PetscReal *xl, PetscReal *yl, PetscReal *xr, PetscReal *yr)
63: {
64: PetscFunctionBegin;
66: PetscAssertPointer(xl, 2);
67: PetscAssertPointer(yl, 3);
68: PetscAssertPointer(xr, 4);
69: PetscAssertPointer(yr, 5);
70: *xl = draw->port_xl;
71: *yl = draw->port_yl;
72: *xr = draw->port_xr;
73: *yr = draw->port_yr;
74: PetscFunctionReturn(PETSC_SUCCESS);
75: }
77: /*@
78: PetscDrawSplitViewPort - Splits a window shared by several processes into smaller
79: view ports. One for each process.
81: Collective
83: Input Parameter:
84: . draw - the drawing context
86: Level: advanced
88: .seealso: `PetscDrawDivideViewPort()`, `PetscDrawSetViewPort()`
89: @*/
90: PetscErrorCode PetscDrawSplitViewPort(PetscDraw draw)
91: {
92: PetscMPIInt rank, size;
93: PetscInt n;
94: PetscBool isnull;
95: PetscReal xl, xr, yl, yr, h;
97: PetscFunctionBegin;
99: PetscCall(PetscDrawIsNull(draw, &isnull));
100: if (isnull) PetscFunctionReturn(PETSC_SUCCESS);
101: PetscCallMPI(MPI_Comm_rank(PetscObjectComm((PetscObject)draw), &rank));
102: PetscCallMPI(MPI_Comm_size(PetscObjectComm((PetscObject)draw), &size));
104: n = (PetscInt)(.1 + PetscSqrtReal((PetscReal)size));
105: while (n * n < size) n++;
107: h = 1.0 / n;
108: xl = (rank % n) * h;
109: xr = xl + h;
110: yl = (rank / n) * h;
111: yr = yl + h;
113: PetscDrawCollectiveBegin(draw);
114: PetscCall(PetscDrawLine(draw, xl, yl, xl, yr, PETSC_DRAW_BLACK));
115: PetscCall(PetscDrawLine(draw, xl, yr, xr, yr, PETSC_DRAW_BLACK));
116: PetscCall(PetscDrawLine(draw, xr, yr, xr, yl, PETSC_DRAW_BLACK));
117: PetscCall(PetscDrawLine(draw, xr, yl, xl, yl, PETSC_DRAW_BLACK));
118: PetscDrawCollectiveEnd(draw);
119: PetscCall(PetscDrawFlush(draw));
121: draw->port_xl = xl + .05 * h;
122: draw->port_xr = xr - .05 * h;
123: draw->port_yl = yl + .05 * h;
124: draw->port_yr = yr - .05 * h;
126: PetscTryTypeMethod(draw, setviewport, xl, yl, xr, yr);
127: PetscFunctionReturn(PETSC_SUCCESS);
128: }
130: /*@C
131: PetscDrawViewPortsCreate - Splits a window into smaller view ports. Each processor shares all the viewports.
133: Collective
135: Input Parameters:
136: + draw - the drawing context
137: - nports - the number of ports
139: Output Parameter:
140: . newports - a `PetscDrawViewPorts` context (C structure)
142: Options Database Key:
143: . -draw_ports - display multiple fields in the same window with PetscDrawPorts() instead of in separate windows
145: Level: advanced
147: .seealso: `PetscDrawSplitViewPort()`, `PetscDrawSetViewPort()`, `PetscDrawViewPortsSet()`, `PetscDrawViewPortsDestroy()`
148: @*/
149: PetscErrorCode PetscDrawViewPortsCreate(PetscDraw draw, PetscInt nports, PetscDrawViewPorts **newports)
150: {
151: PetscDrawViewPorts *ports;
152: PetscInt i, n;
153: PetscBool isnull;
154: PetscMPIInt rank;
155: PetscReal *xl, *xr, *yl, *yr, h;
157: PetscFunctionBegin;
159: PetscCheck(nports >= 1, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Number of divisions must be positive: %" PetscInt_FMT, nports);
160: PetscAssertPointer(newports, 3);
161: PetscCall(PetscDrawIsNull(draw, &isnull));
162: if (isnull) {
163: *newports = NULL;
164: PetscFunctionReturn(PETSC_SUCCESS);
165: }
166: PetscCallMPI(MPI_Comm_rank(PetscObjectComm((PetscObject)draw), &rank));
168: PetscCall(PetscNew(&ports));
169: *newports = ports;
170: ports->draw = draw;
171: ports->nports = nports;
172: PetscCall(PetscObjectReference((PetscObject)draw));
173: /* save previous drawport of window */
174: PetscCall(PetscDrawGetViewPort(draw, &ports->port_xl, &ports->port_yl, &ports->port_xr, &ports->port_yr));
176: n = (PetscInt)(.1 + PetscSqrtReal((PetscReal)nports));
177: while (n * n < nports) n++;
178: h = 1.0 / n;
180: PetscCall(PetscMalloc4(n * n, &xl, n * n, &xr, n * n, &yl, n * n, &yr));
181: ports->xl = xl;
182: ports->xr = xr;
183: ports->yl = yl;
184: ports->yr = yr;
186: PetscCall(PetscDrawSetCoordinates(draw, 0.0, 0.0, 1.0, 1.0));
187: PetscDrawCollectiveBegin(draw);
188: for (i = 0; i < n * n; i++) {
189: xl[i] = (i % n) * h;
190: xr[i] = xl[i] + h;
191: yl[i] = (i / n) * h;
192: yr[i] = yl[i] + h;
194: if (rank == 0) {
195: PetscCall(PetscDrawLine(draw, xl[i], yl[i], xl[i], yr[i], PETSC_DRAW_BLACK));
196: PetscCall(PetscDrawLine(draw, xl[i], yr[i], xr[i], yr[i], PETSC_DRAW_BLACK));
197: PetscCall(PetscDrawLine(draw, xr[i], yr[i], xr[i], yl[i], PETSC_DRAW_BLACK));
198: PetscCall(PetscDrawLine(draw, xr[i], yl[i], xl[i], yl[i], PETSC_DRAW_BLACK));
199: }
201: xl[i] += .05 * h;
202: xr[i] -= .05 * h;
203: yl[i] += .05 * h;
204: yr[i] -= .05 * h;
205: }
206: PetscDrawCollectiveEnd(draw);
207: PetscCall(PetscDrawFlush(draw));
208: PetscFunctionReturn(PETSC_SUCCESS);
209: }
211: /*@C
212: PetscDrawViewPortsCreateRect - Splits a window into smaller
213: view ports. Each processor shares all the viewports. The number
214: of views in the x- and y-directions is specified.
216: Collective
218: Input Parameters:
219: + draw - the drawing context
220: . nx - the number of x divisions
221: - ny - the number of y divisions
223: Output Parameter:
224: . newports - a `PetscDrawViewPorts` context (C structure)
226: Level: advanced
228: .seealso: `PetscDrawSplitViewPort()`, `PetscDrawSetViewPort()`, `PetscDrawViewPortsSet()`, `PetscDrawViewPortsDestroy()`, `PetscDrawViewPorts`
229: @*/
230: PetscErrorCode PetscDrawViewPortsCreateRect(PetscDraw draw, PetscInt nx, PetscInt ny, PetscDrawViewPorts **newports)
231: {
232: PetscDrawViewPorts *ports;
233: PetscReal *xl, *xr, *yl, *yr, hx, hy;
234: PetscInt i, j, k, n;
235: PetscBool isnull;
236: PetscMPIInt rank;
238: PetscFunctionBegin;
240: PetscCheck(nx >= 1 && ny >= 1, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Number of divisions must be positive: %" PetscInt_FMT " x %" PetscInt_FMT, nx, ny);
241: PetscAssertPointer(newports, 4);
242: PetscCall(PetscDrawIsNull(draw, &isnull));
243: if (isnull) {
244: *newports = NULL;
245: PetscFunctionReturn(PETSC_SUCCESS);
246: }
247: PetscCallMPI(MPI_Comm_rank(PetscObjectComm((PetscObject)draw), &rank));
249: n = nx * ny;
250: hx = 1.0 / nx;
251: hy = 1.0 / ny;
252: PetscCall(PetscNew(&ports));
253: *newports = ports;
254: ports->draw = draw;
255: ports->nports = n;
256: PetscCall(PetscObjectReference((PetscObject)draw));
257: /* save previous drawport of window */
258: PetscCall(PetscDrawGetViewPort(draw, &ports->port_xl, &ports->port_yl, &ports->port_xr, &ports->port_yr));
260: PetscCall(PetscMalloc4(n, &xl, n, &xr, n, &yl, n, &yr));
261: ports->xr = xr;
262: ports->xl = xl;
263: ports->yl = yl;
264: ports->yr = yr;
266: PetscCall(PetscDrawSetCoordinates(draw, 0.0, 0.0, 1.0, 1.0));
267: PetscDrawCollectiveBegin(draw);
268: for (i = 0; i < nx; i++) {
269: for (j = 0; j < ny; j++) {
270: k = j * nx + i;
272: xl[k] = i * hx;
273: xr[k] = xl[k] + hx;
274: yl[k] = j * hy;
275: yr[k] = yl[k] + hy;
277: if (rank == 0) {
278: PetscCall(PetscDrawLine(draw, xl[k], yl[k], xl[k], yr[k], PETSC_DRAW_BLACK));
279: PetscCall(PetscDrawLine(draw, xl[k], yr[k], xr[k], yr[k], PETSC_DRAW_BLACK));
280: PetscCall(PetscDrawLine(draw, xr[k], yr[k], xr[k], yl[k], PETSC_DRAW_BLACK));
281: PetscCall(PetscDrawLine(draw, xr[k], yl[k], xl[k], yl[k], PETSC_DRAW_BLACK));
282: }
284: xl[k] += .05 * hx;
285: xr[k] -= .05 * hx;
286: yl[k] += .05 * hy;
287: yr[k] -= .05 * hy;
288: }
289: }
290: PetscDrawCollectiveEnd(draw);
291: PetscCall(PetscDrawFlush(draw));
292: PetscFunctionReturn(PETSC_SUCCESS);
293: }
295: /*@C
296: PetscDrawViewPortsDestroy - frees a `PetscDrawViewPorts` object
298: Collective on the `PetscDraw` inside `ports`
300: Input Parameter:
301: . ports - the `PetscDrawViewPorts` object
303: Level: advanced
305: .seealso: `PetscDrawViewPorts`, `PetscDrawSplitViewPort()`, `PetscDrawSetViewPort()`, `PetscDrawViewPortsSet()`, `PetscDrawViewPortsCreate()`
306: @*/
307: PetscErrorCode PetscDrawViewPortsDestroy(PetscDrawViewPorts *ports)
308: {
309: PetscFunctionBegin;
310: if (!ports) PetscFunctionReturn(PETSC_SUCCESS);
311: PetscAssertPointer(ports, 1);
312: /* reset Drawport of Window back to previous value */
313: PetscCall(PetscDrawSetViewPort(ports->draw, ports->port_xl, ports->port_yl, ports->port_xr, ports->port_yr));
314: PetscCall(PetscDrawDestroy(&ports->draw));
315: PetscCall(PetscFree4(ports->xl, ports->xr, ports->yl, ports->yr));
316: PetscCall(PetscFree(ports));
317: PetscFunctionReturn(PETSC_SUCCESS);
318: }
320: /*@C
321: PetscDrawViewPortsSet - sets a draw object to use a particular subport
323: Logically Collective on the `PetscDraw` inside `ports`
325: Input Parameters:
326: + ports - the `PetscDrawViewPorts` object
327: - port - the port number, from 0 to nports-1
329: Level: advanced
331: .seealso: `PetscDrawViewPorts`, `PetscDrawSplitViewPort()`, `PetscDrawSetViewPort()`, `PetscDrawViewPortsDestroy()`, `PetscDrawViewPortsCreate()`
332: @*/
333: PetscErrorCode PetscDrawViewPortsSet(PetscDrawViewPorts *ports, PetscInt port)
334: {
335: PetscFunctionBegin;
336: if (!ports) PetscFunctionReturn(PETSC_SUCCESS);
337: PetscAssertPointer(ports, 1);
338: PetscCheck(port >= 0 && (port <= ports->nports - 1), PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Port is out of range requested %" PetscInt_FMT " from 0 to %" PetscInt_FMT, port, ports->nports - 1);
339: PetscCall(PetscDrawSetViewPort(ports->draw, ports->xl[port], ports->yl[port], ports->xr[port], ports->yr[port]));
340: PetscFunctionReturn(PETSC_SUCCESS);
341: }