1 2 static char help[] = "Demonstrates drawing primitives in a window\n"; 3 4 #include <petscdraw.h> 5 6 int main(int argc,char **argv) 7 { 8 PetscDraw draw; 9 PetscErrorCode ierr; 10 11 int i,j,w,h; 12 int k = PETSC_DRAW_BLACK; 13 int r = PETSC_DRAW_RED; 14 int g = PETSC_DRAW_GREEN; 15 int b = PETSC_DRAW_BLUE; 16 int y = PETSC_DRAW_YELLOW; 17 int c0 = PETSC_DRAW_BASIC_COLORS; 18 int c2 = 255; 19 int c1 = (c0+c2)/2; 20 21 ierr = PetscInitialize(&argc,&argv,NULL,help);if (ierr) return ierr; 22 23 CHKERRQ(PetscDrawCreate(PETSC_COMM_WORLD,0,"Draw Example",PETSC_DECIDE,PETSC_DECIDE,101,101,&draw)); 24 /*CHKERRQ(PetscDrawSetPause(draw,2.0));*/ 25 CHKERRQ(PetscDrawSetFromOptions(draw)); 26 27 CHKERRQ(PetscDrawCheckResizedWindow(draw)); 28 CHKERRQ(PetscDrawGetWindowSize(draw,&w,&h)); 29 CHKERRQ(PetscDrawSetCoordinates(draw,0,0,--w,--h)); 30 CHKERRQ(PetscDrawClear(draw)); 31 /* one-pixel lines in the window corners */ 32 CHKERRQ(PetscDrawLine(draw,0,0,0,0,r)); 33 CHKERRQ(PetscDrawLine(draw,w,0,w,0,r)); 34 CHKERRQ(PetscDrawLine(draw,0,h,0,h,r)); 35 CHKERRQ(PetscDrawLine(draw,w,h,w,h,r)); 36 /* border lines with two pixels from borders */ 37 CHKERRQ(PetscDrawLine(draw,0+2,0,w-2,0,k)); 38 CHKERRQ(PetscDrawLine(draw,0+2,h,w-2,h,k)); 39 CHKERRQ(PetscDrawLine(draw,0,0+2,0,h-2,k)); 40 CHKERRQ(PetscDrawLine(draw,w,0+2,w,h-2,k)); 41 /* oblique lines */ 42 CHKERRQ(PetscDrawLine(draw,0+2,h/2,w-2,h-2,b)); 43 CHKERRQ(PetscDrawLine(draw,0+1,h-1,w-1,0+1,b)); 44 /* vertical up and down arrow, two pixels from borders */ 45 CHKERRQ(PetscDrawArrow(draw,1*w/4,0+2,1*w/4,h-2,g)); 46 CHKERRQ(PetscDrawArrow(draw,3*w/4,h-2,3*w/4,0+2,g)); 47 /* horizontal right and left arrow, two pixels from borders */ 48 CHKERRQ(PetscDrawArrow(draw,0+2,3*h/4,w-2,3*h/4,g)); 49 CHKERRQ(PetscDrawArrow(draw,w-2,1*h/4,0+2,1*h/4,g)); 50 /* flush, save, and pause */ 51 CHKERRQ(PetscDrawFlush(draw)); 52 CHKERRQ(PetscDrawSave(draw)); 53 CHKERRQ(PetscDrawPause(draw)); 54 55 CHKERRQ(PetscDrawCheckResizedWindow(draw)); 56 CHKERRQ(PetscDrawGetWindowSize(draw,&w,&h)); 57 CHKERRQ(PetscDrawSetCoordinates(draw,0,0,--w,--h)); 58 CHKERRQ(PetscDrawClear(draw)); 59 /* one-pixel rectangles in the window corners */ 60 CHKERRQ(PetscDrawRectangle(draw,0,0,0,0,k,k,k,k)); 61 CHKERRQ(PetscDrawRectangle(draw,w,0,w,0,k,k,k,k)); 62 CHKERRQ(PetscDrawRectangle(draw,0,h,0,h,k,k,k,k)); 63 CHKERRQ(PetscDrawRectangle(draw,w,h,w,h,k,k,k,k)); 64 /* border rectangles with two pixels from borders */ 65 CHKERRQ(PetscDrawRectangle(draw,0+2,0,w-2,0,k,k,k,k)); 66 CHKERRQ(PetscDrawRectangle(draw,0+2,h,w-2,h,k,k,k,k)); 67 CHKERRQ(PetscDrawRectangle(draw,0,0+2,0,h-2,k,k,k,k)); 68 CHKERRQ(PetscDrawRectangle(draw,w,0+2,w,h-2,k,k,k,k)); 69 /* more rectangles */ 70 CHKERRQ(PetscDrawRectangle(draw,0+2,0+2,w/2-1,h/2-1,b,b,b,b)); 71 CHKERRQ(PetscDrawRectangle(draw,0+2,h/2+1,w/2-1,h-2,r,r,r,r)); 72 CHKERRQ(PetscDrawRectangle(draw,w/2+1,h/2+1,w-2,h-2,g,g,g,g)); 73 CHKERRQ(PetscDrawRectangle(draw,w/2+1,0+2,w-2,h/2-1,y,y,y,y)); 74 /* flush, save, and pause */ 75 CHKERRQ(PetscDrawFlush(draw)); 76 CHKERRQ(PetscDrawSave(draw)); 77 CHKERRQ(PetscDrawPause(draw)); 78 79 CHKERRQ(PetscDrawCheckResizedWindow(draw)); 80 CHKERRQ(PetscDrawGetWindowSize(draw,&w,&h)); 81 CHKERRQ(PetscDrawSetCoordinates(draw,0,0,--w,--h)); 82 CHKERRQ(PetscDrawClear(draw)); 83 /* interpolated triangles, one pixel from borders */ 84 CHKERRQ(PetscDrawTriangle(draw,0+1,0+1,w-1,0+1,w-1,h-1,c0,c1,c2)); 85 CHKERRQ(PetscDrawTriangle(draw,0+1,0+1,0+1,h-1,w-1,h-1,c0,c1,c2)); 86 /* interpolated triangle, oblique, inside canvas */ 87 CHKERRQ(PetscDrawTriangle(draw,w/4,h/4,w/2,3*h/4,3*w/4,h/2,c2,c1,c0)); 88 /* flush, save, and pause */ 89 CHKERRQ(PetscDrawFlush(draw)); 90 CHKERRQ(PetscDrawSave(draw)); 91 CHKERRQ(PetscDrawPause(draw)); 92 93 CHKERRQ(PetscDrawCheckResizedWindow(draw)); 94 CHKERRQ(PetscDrawGetWindowSize(draw,&w,&h)); 95 CHKERRQ(PetscDrawSetCoordinates(draw,0,0,--w,--h)); 96 CHKERRQ(PetscDrawClear(draw)); 97 /* circles and ellipses */ 98 CHKERRQ(PetscDrawEllipse(draw,w/2,h/2,w-1,h-1,r)); 99 CHKERRQ(PetscDrawEllipse(draw,w,h/2,w/2,h,g)); 100 CHKERRQ(PetscDrawEllipse(draw,0,0,w,h/2,b)); 101 CHKERRQ(PetscDrawEllipse(draw,w/4,3*h/4,w/2,h/4,y)); 102 CHKERRQ(PetscDrawCoordinateToPixel(draw,w/2,h/2,&i,&j)); 103 CHKERRQ(PetscDrawPointPixel(draw,i,j,k)); 104 /* flush, save, and pause */ 105 CHKERRQ(PetscDrawFlush(draw)); 106 CHKERRQ(PetscDrawSave(draw)); 107 CHKERRQ(PetscDrawPause(draw)); 108 109 CHKERRQ(PetscDrawDestroy(&draw)); 110 ierr = PetscFinalize(); 111 return ierr; 112 } 113 114 /*TEST 115 116 build: 117 requires: x 118 119 test: 120 output_file: output/ex1_1.out 121 122 TEST*/ 123