1c4762a1bSJed Brown static char help[] = "Demonstrates named colormaps\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscsys.h> 4c4762a1bSJed Brown #include <petscdraw.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown typedef PetscReal (*Function)(PetscReal,PetscReal); 7c4762a1bSJed Brown 8c4762a1bSJed Brown typedef struct { 9c4762a1bSJed Brown Function function; 10c4762a1bSJed Brown } FunctionCtx; 11c4762a1bSJed Brown 12c4762a1bSJed Brown #define Exp PetscExpReal 13c4762a1bSJed Brown #define Pow PetscPowReal 14c4762a1bSJed Brown static PetscReal Peaks(PetscReal x,PetscReal y) 15c4762a1bSJed Brown { 16c4762a1bSJed Brown return 3 * Pow(1-x,2) * Exp(-Pow(x,2) - Pow(y+1,2)) 17c4762a1bSJed Brown - 10 * (x/5 - Pow(x,3) - Pow(y,5)) * Exp(-Pow(x,2) - Pow(y,2)) 18c4762a1bSJed Brown - 1./3 * Exp(-Pow(x+1,2) - Pow(y,2)); 19c4762a1bSJed Brown } 20c4762a1bSJed Brown 21c4762a1bSJed Brown static PetscErrorCode DrawFunction(PetscDraw draw,void *ctx) 22c4762a1bSJed Brown { 23c4762a1bSJed Brown int i,j,w,h; 24c4762a1bSJed Brown Function function = ((FunctionCtx*)ctx)->function; 25c4762a1bSJed Brown PetscReal min = PETSC_MAX_REAL, max = PETSC_MIN_REAL; 26c4762a1bSJed Brown MPI_Comm comm = PetscObjectComm((PetscObject)draw); 27c4762a1bSJed Brown PetscMPIInt size,rank; 28c4762a1bSJed Brown PetscDraw popup; 29c4762a1bSJed Brown 30c4762a1bSJed Brown PetscFunctionBegin; 319566063dSJacob Faibussowitsch PetscCall(PetscDrawGetWindowSize(draw,&w,&h)); 329566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(comm,&size)); 339566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(comm,&rank)); 34c4762a1bSJed Brown 35d0609cedSBarry Smith PetscDrawCollectiveBegin(draw); 36c4762a1bSJed Brown for (j=rank; j<h; j+=size) { 37c4762a1bSJed Brown for (i=0; i<w; i++) { 38c4762a1bSJed Brown PetscReal x,y,f; int color; 399566063dSJacob Faibussowitsch PetscCall(PetscDrawPixelToCoordinate(draw,i,j,&x,&y)); 40c4762a1bSJed Brown f = function(x,y); color = PetscDrawRealToColor(f,-8,+8); 419566063dSJacob Faibussowitsch PetscCall(PetscDrawPointPixel(draw,i,j,color)); 42c4762a1bSJed Brown min = PetscMin(f,min); max = PetscMax(f,max); 43c4762a1bSJed Brown } 44c4762a1bSJed Brown } 45d0609cedSBarry Smith PetscDrawCollectiveEnd(draw); 46c4762a1bSJed Brown 479566063dSJacob Faibussowitsch PetscCall(PetscDrawGetPopup(draw,&popup)); 489566063dSJacob Faibussowitsch PetscCall(PetscDrawScalePopup(popup,-8,+8)); 49c4762a1bSJed Brown PetscFunctionReturn(0); 50c4762a1bSJed Brown } 51c4762a1bSJed Brown 52c4762a1bSJed Brown int main(int argc,char **argv) 53c4762a1bSJed Brown { 54c4762a1bSJed Brown char title[64],cmap[32] = ""; 55c4762a1bSJed Brown PetscDraw draw; 56c4762a1bSJed Brown FunctionCtx ctx; 57c4762a1bSJed Brown 58c4762a1bSJed Brown ctx.function = Peaks; 59*327415f7SBarry Smith PetscFunctionBeginUser; 609566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&argv,NULL,help)); 619566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL,NULL,"-draw_cmap",cmap,sizeof(cmap),NULL)); 629566063dSJacob Faibussowitsch PetscCall(PetscSNPrintf(title,sizeof(title),"Colormap: %s",cmap)); 63c4762a1bSJed Brown 649566063dSJacob Faibussowitsch PetscCall(PetscDrawCreate(PETSC_COMM_WORLD,NULL,title,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,&draw)); 659566063dSJacob Faibussowitsch PetscCall(PetscObjectSetName((PetscObject)draw,"Peaks")); 669566063dSJacob Faibussowitsch PetscCall(PetscDrawSetFromOptions(draw)); 679566063dSJacob Faibussowitsch PetscCall(PetscDrawSetCoordinates(draw,-3,-3,+3,+3)); 689566063dSJacob Faibussowitsch PetscCall(PetscDrawZoom(draw,DrawFunction,&ctx)); 699566063dSJacob Faibussowitsch PetscCall(PetscDrawSave(draw)); 70c4762a1bSJed Brown 719566063dSJacob Faibussowitsch PetscCall(PetscDrawDestroy(&draw)); 729566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 73b122ec5aSJacob Faibussowitsch return 0; 74c4762a1bSJed Brown } 75c4762a1bSJed Brown 76c4762a1bSJed Brown /*TEST 77c4762a1bSJed Brown 78c4762a1bSJed Brown build: 79c4762a1bSJed Brown requires: x 80c4762a1bSJed Brown 81c4762a1bSJed Brown test: 82c4762a1bSJed Brown args: -draw_cmap hue 83c4762a1bSJed Brown output_file: output/ex1_1.out 84c4762a1bSJed Brown 85c4762a1bSJed Brown test: 86c4762a1bSJed Brown suffix: 2 87c4762a1bSJed Brown args: -draw_cmap gray 88c4762a1bSJed Brown output_file: output/ex1_1.out 89c4762a1bSJed Brown 90c4762a1bSJed Brown test: 91c4762a1bSJed Brown suffix: 3 92c4762a1bSJed Brown args: -draw_cmap bone 93c4762a1bSJed Brown output_file: output/ex1_1.out 94c4762a1bSJed Brown 95c4762a1bSJed Brown test: 96c4762a1bSJed Brown suffix: 4 97c4762a1bSJed Brown args: -draw_cmap jet 98c4762a1bSJed Brown output_file: output/ex1_1.out 99c4762a1bSJed Brown 100c4762a1bSJed Brown test: 101c4762a1bSJed Brown suffix: 5 102c4762a1bSJed Brown args: -draw_cmap coolwarm 103c4762a1bSJed Brown output_file: output/ex1_1.out 104c4762a1bSJed Brown 105c4762a1bSJed Brown test: 106c4762a1bSJed Brown suffix: 6 107c4762a1bSJed Brown args: -draw_cmap parula 108c4762a1bSJed Brown output_file: output/ex1_1.out 109c4762a1bSJed Brown 110c4762a1bSJed Brown test: 111c4762a1bSJed Brown suffix: 7 112c4762a1bSJed Brown args: -draw_cmap viridis 113c4762a1bSJed Brown output_file: output/ex1_1.out 114c4762a1bSJed Brown 115c4762a1bSJed Brown test: 116c4762a1bSJed Brown suffix: 8 117c4762a1bSJed Brown args: -draw_cmap plasma 118c4762a1bSJed Brown output_file: output/ex1_1.out 119c4762a1bSJed Brown 120c4762a1bSJed Brown TEST*/ 121