36 lines
2 KiB
Markdown
36 lines
2 KiB
Markdown
A tool to send lines to a series of laser projectors (showlasers). Uses the [nannou](https://github.com/nannou-org/nannou) creative coding framework for laser control, and optimisation of the lines before sending them to the DAC.
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It's still a bit of a hacked-together tool. But it works for my case.
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## Features
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* Receive lines over ZMQ.
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* Safety feature: stop the output if no lines are received
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* Clipping mask, to mark laser-free zones
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* Homography by simply dragging the corners of the projection area/corner-pin.
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* Change intensity of projected lines.
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* Geometric (pincushion/barrel) correction for x and y axes independently
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* Particularly x-distortion tends to be present in laser systems due to the independent x/y galvanometer setup.
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* Configuration can be saved to a JSON file.
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* Many of the settings can be configured per DAC.
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* Some pre-defined shapes for debugging purposes.
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## Basic idea
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This tool was initially an adaption of the [laser_frame_stream_gui.rs example code](https://github.com/nannou-org/nannou/blob/master/examples/laser/laser_frame_stream.rs) to enable projection mapping of a large space, which required multiple lasers. Received lines are assumed to be in world-space coordinates. The space is mapped to distinct laser DACs by means of homography/corner-pinning and various geometric correction parameters.
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By using ZMQ as input, the mapping of the lines is decoupled from the generation code. In my own setup ([trap](https://git.rubenvandeven.com/security_vision/trap)) the lines are generated by means of a sequence of Python scripts.
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<video controls="" src="/security_vision/laserspace/raw/branch/main/assets/screenshots/laserspace-demo.mp4">
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<strong>Your browser does not support the HTML5 "video" tag.</strong>
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</video>
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## Usage
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```bash
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cargo run ZMQ_QUEUE_ADDRESS
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```
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