draw-triangle
wayland/ssd1306-oled-i2c/draw-triangle
Draw a triangle. Writes data to display buffer. To show content of display buffer on screen use node send-buffer-to-display.
draw-triangle
@/draw-triangle
Draw a triangle. Writes data to display buffer. To show content of display buffer on screen use node send-buffer-to-display.
DEV@/ssd1306-oled-i2c-device
An SSD1306 OLED device.
X0number
Vertex #0 x coordinate.
Y0number
Vertex #0 y coordinate
X1number
Vertex #1 x coordinate
Y1number
Vertex #1 y coordinate
X2number
Vertex #2 x coordinate
Y2number
Vertex #2 y coordinate
COLOURnumber
Colour of circle. Options:
0 = black;
1 = white;
2 = invert.
FILLboolean
TRUE to fill triangle with colour, FALSE to draw outline only.
UPDpulse
Update. Trigger write to display buffer.
DONEpulse
Pulses on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
struct State {
};
{{ GENERATED_CODE }}
void evaluate(Context ctx) {
// The node responds only if there is an input pulse
if (!isInputDirty<input_UPD>(ctx))
return;
// Get a pointer to the `Adafruit_SSD1306` class instance
auto display = getValue<input_DEV>(ctx);
auto x0 = getValue<input_X0>(ctx);
auto y0 = getValue<input_Y0>(ctx);
auto x1 = getValue<input_X1>(ctx);
auto y1 = getValue<input_Y1>(ctx);
auto x2 = getValue<input_X2>(ctx);
auto y2 = getValue<input_Y2>(ctx);
auto colour = getValue<input_COLOUR>(ctx);
auto fill = getValue<input_FILL>(ctx);
if (fill){
display->fillTriangle(x0, y0, x1, y1, x2, y2, colour);
}else{
display->drawTriangle(x0, y0, x1, y1, x2, y2, colour);
}
emitValue<output_DONE>(ctx, 1);
}