exPlotFigure.cpp

Render a retained line plot. Record one training-loss series, render the retained figure through OA's GPU compositor, save it, and optionally inspect it in Viewer.

ExSDK source-ownedC++Ui

Source

Ui · Vulkan graphics

sdk/cpp/examples/ui/plotFigure.cpp

Record one training-loss series, render the retained figure through OA's GPU compositor, save it, and optionally inspect it in Viewer.

API

Example

1#include <oa/oa.h>
2
3OA_MAIN_MODE("ExamplePlotLine", argc > 1 and oa::StringView(argv[1]) == "--preview" ? oa::PresentationMode::Swapchain : oa::PresentationMode::Headless) {
4	oa::plot::Figure figure({
5		.title = "Training loss",
6		.width = 960U,
7		.height = 540U,
8		.theme = oa::plot::Theme::Dark,
9	});
10	constexpr oa::Array<oa::F32, 6> figureValues{
11		1.0F, 0.72F, 0.51F, 0.38F, 0.29F, 0.23F
12	};
13	figure.ax(0, 0).xLabel("step");
14	figure.ax(0, 0).yLabel("loss");
15	figure.ax(0, 0).plot(figureValues);
16
17	auto renderedResult = figure.render(engine);
18	if (not renderedResult.isOk()) return 1;
19	auto rendered = oa::move(renderedResult).getValue();
20
21	const oa::Path output = oa::Paths::var("example/ui/trainingLoss.jpg");
22	if (not oa::Filesystem::createDirectories(output.parentPath()).isOk()) return 1;
23	if (not oa::FnImage::saveFile(output, rendered, 92U).isOk()) return 1;
24
25	if (not rendered.validate()) return 1;
26	if (rendered.width() != 960 or rendered.height() != 540) return 1;
27	if (rendered.format() != oa::ImageFormat::Rgba) return 1;
28	if (not oa::Filesystem::isFile(output)) return 1;
29
30	oa::print("Saved training-loss plot: {}", output.cStr());
31
32	if (argc > 1 and oa::StringView(argv[1]) == "--preview") {
33		oa::ViewerConfig previewConfig;
34		previewConfig.mode = oa::ViewerMode::Image;
35		previewConfig.title = "OA plot · training loss";
36		previewConfig.width = 1280U;
37		previewConfig.height = 646U;
38		if (not oa::Viewer::preview(engine, oa::Paths::var("example/ui/trainingLoss.jpg").string(),
39			previewConfig).isOk()) {
40			return 1;
41		}
42	}
43	return 0;
44}
45

Output

Rendered plot. This is the exact 960×540 JPEG produced by the retained figure in the source-owned example.

Dark training-loss line plot rendered by OA — output
Training loss
Download image
A dark retained line plot rendered by OA's GPU compositor and saved through oa::FnImage.
960×540 · image/jpegSHA-256 7c60f7dea23a4180641016ef05eae0c3672bb784570d52f1aa44fcaada2ba762sdk/py/examples/ui/plotFigure.py

Present

The Output section above remains the exact artifact evidence. These captures document the current interactive Viewer surface used by the presentation path.