78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
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// Codetastic 2024
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// ChatGPT was used to create this.
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#ifndef PatternStarfield_H
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#define PatternStarfield_H
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#include <vector>
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#define STAR_COUNT 128
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// Star structure
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struct Star {
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float x, y, z;
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CRGB colour;
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};
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class PatternStarfield : public Drawable {
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private:
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std::vector<Star> stars;
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float speed = 0.5f;
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public:
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PatternStarfield() {
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name = (char *)"Starfield";
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}
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void start()
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{
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stars.resize(STAR_COUNT);
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for (int i = 0; i < STAR_COUNT; ++i) {
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stars[i] = { static_cast<float>(rand() % VPANEL_W - VPANEL_W / 2),
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static_cast<float>(rand() % VPANEL_H - VPANEL_H / 2),
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static_cast<float>(rand() % VPANEL_W),
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effects.ColorFromCurrentPalette(rand()*255)
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};
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} // random positions
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};
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unsigned int drawFrame() {
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effects.DimAll(250);
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// Update star positions
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for (auto& star : stars) {
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star.z -= speed;
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if (star.z <= 0) {
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star.z = VPANEL_W;
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star.x = static_cast<float>(rand() % VPANEL_W - VPANEL_W / 2);
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star.y = static_cast<float>(rand() % VPANEL_H - VPANEL_H / 2);
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}
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}
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// draw position
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for (const auto& star : stars) {
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float k = 128.0f / star.z;
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int x = static_cast<int>(star.x * k + VPANEL_W / 2);
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int y = static_cast<int>(star.y * k + VPANEL_H / 2);
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if (x >= 0 && x < VPANEL_W && y >= 0 && y < VPANEL_H) {
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// TODO: Get brighter as we get closer to edges?
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effects.setPixel(x, y, star.colour);
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}
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}
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effects.ShowFrame();
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return 0;
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}
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};
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#endif
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