TrussC for
oF Users

Beautiful Strokes with StrokeMesh

In oF, thick lines had ugly clipped corners and endpoints.
StrokeMesh gives you beautiful strokes with proper edges.

// Draw lines of any thickness with StrokeMesh
StrokeMesh stroke;
stroke.setStrokeWidth(5.0f);  // 5px thick line
stroke.moveTo(0, 0);
stroke.lineTo(100, 100);
stroke.draw();

// Can also create from Polyline
Polyline line;
line.addVertex(0, 0);
line.addVertex(100, 50);
StrokeMesh stroke2(line, 3.0f);
stroke2.draw();

Automatic Management with shared_ptr

// Automatic management with shared_ptr
auto parent = Node::create();
auto child = Node::create();
parent->addChild(child);

// When parent is destroyed, children are automatically released
// Circular references safely avoided with weak_ptr

Automatic Local Coordinate Transform

// RectNode automatically transforms to local coordinates
class MyButton : public RectNode {
    void onMousePressed(const Vec2& localPos, int button) override {
        // localPos is in THIS node's coordinate space
        // Even if parent is rotated, you get local coords!
        if (localPos.x < width/2) {
            // Left half clicked
        }
    }
};

Z-Order Aware Event Consumption

// RectNode automatically respects Z-order
// Front nodes receive events first

void onMousePressed(const Vec2& pos, int button) override {
    // Handle here, and nodes behind won't receive it
    consumeEvent();
}

Safe Main-Thread Sync Timers

// Safe delayed execution on main thread
node->callAfter(3.0f, []() {
    // Runs on main thread after 3 seconds
    // No mutex needed, no data race worries
});

// Repeating execution is easy too
node->callEvery(1.0f, []() {
    // Runs every second
});

Native Backends via Sokol

Metal / DirectX 12 / Vulkan / WebGPU support.
Runs on OS-recommended native APIs for optimal speed and power efficiency.
WebAssembly + WebGPU provides excellent browser portability.

MIT / zlib / Public Domain Only

Zero GPL contamination guaranteed.
All dependencies are commercial-use friendly.
Use with confidence for client projects.

Independent Update & Draw Control

By default, update and draw alternate as usual. But for event-driven UI apps, you can avoid unnecessary draws by triggering them separately (e.g., on click).
For render-heavy apps, you can also run update at a fixed rate.

// Independent control of Draw and Update
setDrawVsync(true);    // Draw at VSync (60Hz)
setUpdateFps(120);      // Physics update at 120Hz

// Event-driven mode (power-saving)
setDrawFps(0);          // Disable auto-draw
// Call redraw() in mousePressed etc. to trigger draw