Function Engine_stepFrame

src/engine/Engine.cpp:428–473

Steps a single frame */

/** Steps a single frame
*/
static void Engine_stepFrame(Engine* that) {
	Engine::Internal* internal = that->internal;

	// Param smoothing
	Module* smoothModule = internal->smoothModule;
	if (smoothModule) {
		int smoothParamId = internal->smoothParamId;
		float smoothValue = internal->smoothValue;
		Param* smoothParam = &smoothModule->params[smoothParamId];
		float value = smoothParam->value;
		// Use decay rate of roughly 1 graphics frame
		const float smoothLambda = 60.f;
		float newValue = value + (smoothValue - value) * smoothLambda * internal->sampleTime;
		if (value == newValue) {
			// Snap to actual smooth value if the value doesn't change enough (due to the granularity of floats)
			smoothParam->setValue(smoothValue);
			internal->smoothModule = NULL;
			internal->smoothParamId = 0;
		}
		else {
			smoothParam->setValue(newValue);
		}
	}

	// Step modules along with workers
	internal->workerModuleIndex = 0;
	internal->engineBarrier.wait();
	Engine_stepWorker(that, 0);
	internal->workerBarrier.wait();

	Engine_stepFrameCables(that);

	// Flip messages for each module
	for (Module* module : that->internal->modules) {
		if (module->leftExpander.messageFlipRequested) {
			std::swap(module->leftExpander.producerMessage, module->leftExpander.consumerMessage);
			module->leftExpander.messageFlipRequested = false;
		}
		if (module->rightExpander.messageFlipRequested) {
			std::swap(module->rightExpander.producerMessage, module->rightExpander.consumerMessage);
			module->rightExpander.messageFlipRequested = false;
		}
	}

	internal->frame++;
}


static void Engine_refreshParamHandleCache(Engine* that) {