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.
draw-triangle
DEV
X0
Y0
X1
Y1
X2
Y2
COLOUR
FILL
UPD
DONE
DONEpulse
Pulses on completion.
To use the node in your project you should have the wayland/ssd1306-oled-i2c library installed. Use the “File → Add Library” menu item in XOD IDE if you don’t have it yet. See Using libraries for more info.

C++ implementation

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);
}