main.cpp

#include "png_writer.h"
#include <iostream>

//--------------------------------------------------------------------------------------------------
// All length measurements are in mm.
int main() {
    // reused vars... dirty C style
    double pad_x_min;
    double pad_x_max;
    double pad_y_min;
    double pad_y_max;

    double ppmm = 50;
    auto const to_px = [ppmm](double x) {
        return static_cast<uint32_t>(ppmm * x);
    };

    // overall board dims
    double const width = 6;
    double const height = 14;
    uint32_t const width_px = to_px(width);
    uint32_t const height_px = to_px(height);

    PngWriter png_writer;
    png_writer.allocate(width_px, height_px);
    png_writer.set_all_pixels_black();

    auto const set_pixel = [&png_writer, height_px](uint32_t x, uint32_t y) {
        png_writer.set_pixel(x, height_px - y - 1, 255);
    };

    // SOIC dims
    double const pad_width = 0.5;
    double const pad_height = 2.4;
    //double const soic_width = 5;
    double const soic_height = 7;
    double const soic_pitch = 1.27;

    // Draw the SOIC pads
    double const soic_pos_x = 0.5 * (width - 3 * soic_pitch - pad_width);
    double const soic_pos_y = 0.5 * (height - soic_height);
    for (uint32_t i = 0; i < 4; ++i) {
        pad_x_min = soic_pos_x + i * soic_pitch;
        pad_x_max = pad_x_min + pad_width;

        pad_y_min = soic_pos_y;
        pad_y_max = pad_y_min + pad_height;
        for (uint32_t x = to_px(pad_x_min); x < to_px(pad_x_max); ++x) {
            for (uint32_t y = to_px(pad_y_min); y < to_px(pad_y_max); ++y) {
                set_pixel(x, y);
            }
        }

        pad_y_min = height - pad_y_max;
        pad_y_max = pad_y_min + pad_height;
        for (uint32_t x = to_px(pad_x_min); x < to_px(pad_x_max); ++x) {
            for (uint32_t y = to_px(pad_y_min); y < to_px(pad_y_max); ++y) {
                set_pixel(x, y);
            }
        }
    }

    // Cable attachment dims
    double const min_cut_thickness = 0.4;
    double const cable_pad_height = 2.4;
    pad_x_min = (width - 2 * min_cut_thickness) / 3;
    pad_x_max = pad_x_min + min_cut_thickness;
    pad_y_min = 0;
    pad_y_max = pad_y_min + cable_pad_height;
    for (uint32_t x = to_px(pad_x_min); x < to_px(pad_x_max); ++x) {
        for (uint32_t y = to_px(pad_y_min); y < to_px(pad_y_max); ++y) {
            set_pixel(x, y);
        }
    }

    png_writer.write("node_board_traces.png");

    return 0;
}