pixled/signal/square.cpp

Demonstrates the pixled::signal::Square usage.

square_t.gif	square_x.gif	square_x_t.gif	square_radial_t.gif

#include "pixled.h"
#include "pixled/gif_output.h"
 
using namespace pixled;
 
int main(int argc, char** argv) {
    pixled::LedPanel panel(16, 16, pixled::LEFT_RIGHT_RIGHT_LEFT_FROM_BOTTOM);
    pixled::GifOutput out(256, pixled::FIT_WIDTH, 20, panel);
 
    // Time dependent wave
    {
        auto animation = pixled::rgb(
                // Red
                0,
                // Green
                0,
                // Blue = Time dependent square with a period of 10,
                // centered on 122, amplitude of 25
                pixled::Cast<std::uint8_t>(122 + (
                        25 * pixled::Square(pixled::Cast<float>(pixled::T()) / 10.f)
                        ))
                );
        pixled::Runtime runtime(panel, out, animation);
 
        // Writes 20 frames to gif file
        out.write(runtime, 20, "square_t.gif");
    }
 
    // Space dependent wave
    {
        auto animation = pixled::rgb(
                // Red
                0,
                // Green
                0,
                // Blue = Space dependent square wave of period 8,
                // centered on 122, amplitude of 25
                pixled::Cast<std::uint8_t>(122 + (
                        25 * pixled::Square(pixled::Cast<float>(pixled::X()) / 8.f)
                        ))
                );
        pixled::Runtime runtime(panel, out, animation);
 
        // Writes 20 frames to gif file
        out.write(runtime, 20, "square_x.gif");
    }
 
    // Linear progressive wave
    {
        auto animation = pixled::rgb(
                // Red
                0,
                // Green
                0,
                // Blue = Progressive square wave,
                // values centered on 122, amplitude of 25,
                // space period 8, time period 10
                pixled::Cast<std::uint8_t>(122 + (25 * pixled::Square(
                    pixled::X() / 8.f - pixled::T() / 10.f
                )))
            );
 
        pixled::Runtime runtime(panel, out, animation);
 
        // Writes 20 frames to gif file
        out.write(runtime, 20, "square_x_t.gif");
    }
 
    // Radial progressive wave
    {
        auto animation = pixled::rgb(
                // Red
                0,
                // Green
                0,
                // Blue = Radial progressive square wave,
                // values centered on 122, amplitude of 25,
                // space period 8, time period 10
                pixled::Cast<std::uint8_t>(122 + (25 * pixled::Square(
                            pixled::Distance(
                                pixled::Point(pixled::X(), pixled::Y()),
                                pixled::Point(8, 8)
                                ) / 8.f
                            - pixled::T() / 10.f
                            )))
                );
 
        pixled::Runtime runtime(panel, out, animation);
 
        // Writes 20 frames to gif file
        out.write(runtime, 20, "square_radial_t.gif");
    }
}