generate-grid
wayland/generate-grid/generate-grid
Calculate the coordinates of all rectangles in a user specified grid.
generate-grid
@/generate-grid
Calculate the coordinates of all rectangles in a user specified grid.
X-startnumber
X coordinate of the left hand side of the grid.
X-stopnumber
X coordinate of the right hand side of the grid. Should be greater than X-start.
X-stepnumber
Horizontal spacing between elements in grid.
Y-startnumber
Y coordinate of the top of the grid.
Y-stopnumber
Y coordinate of the bottom of the grid. Should be greater than Y-start.
Y-stepnumber
Vertical spacing between elements in grid.
UPDpulse
Update. Begin generation of new grid coordinates.
Donepulse
Pulse when all grid coordinates have been output.
Nextpulse
Pulse on output of each new pair of coordinates.
Ynumber
Y coordinate of grid element.
Xnumber
X coordinate of grid element.
C++ implementation
node {
// Internal state variables defined at this level persists across evaluations
Number xStart;
Number xStop;
Number xStep;
Number yStart;
Number yStop;
Number yStep;
Number x;
Number y;
bool update;
void evaluate(Context ctx) {
if(isInputDirty<input_UPD>(ctx)) {
xStart = getValue<input_X_start>(ctx);
xStop = getValue<input_X_stop>(ctx);
xStep = getValue<input_X_step>(ctx);
yStart = getValue<input_Y_start>(ctx);
yStop = getValue<input_Y_stop>(ctx);
yStep = getValue<input_Y_step>(ctx);
x = xStart;
y = yStart;
update = true;
}
if(update) {
if (x <= xStop && y <= yStop) {
emitValue<output_X>(ctx, x);
emitValue<output_Y>(ctx, y);
emitValue<output_Next>(ctx, 1);
x += xStep;
setImmediate();
}
else if (x > xStop && y <= yStop) {
x = xStart;
y += yStep;
setImmediate();
} else {
update = false;
emitValue<output_Done>(ctx, 1);
}
}
}
}