68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
#pragma once
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class Blob {
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uint16_t m_pos;
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int8_t m_velocity;
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uint8_t m_hue;
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int16_t m_brightness;
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uint8_t m_saturation;
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int8_t m_fadeDir;
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public:
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Blob()
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: m_pos(0),
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m_velocity(1),
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m_hue(0),
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m_brightness(1),
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m_saturation(200),
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m_fadeDir(1) {}
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void setSaturation(uint8_t v) {
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m_saturation = v;
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}
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void setPos(uint16_t p) {
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m_pos = p;
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m_brightness = p % 120 + 1;
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}
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void setHue(uint8_t p) {
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m_hue = p;
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}
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void setBrightness(uint8_t p) {
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m_brightness = p;
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}
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void setVelocity(int8_t v) {
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m_velocity = v;
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}
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void update() {
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m_pos += m_velocity;
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m_hue += 1;
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m_brightness += m_fadeDir;
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if (m_brightness >= 255 || m_brightness <= 0) {
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m_fadeDir *= -1;
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}
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}
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void render(Display* display) const {
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const uint8_t width = 25;
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auto map = display->coordinateMapping();
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// Grab the physical pixel we'll start with
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PhysicalCoordinates startPos = map->virtualToPhysicalCoords({m_pos, 0});
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PhysicalCoordinates endPos = map->virtualToPhysicalCoords({m_pos + width, 0});
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int scaledWidth = std::abs(endPos.x - startPos.x);
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for(uint8_t i = 0;i < scaledWidth; i++) {
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// Blobs desaturate towards their tail
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NSFastLED::CHSV blobColor(m_hue, m_saturation, NSFastLED::quadwave8((i / (double)scaledWidth) * m_brightness));
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PhysicalCoordinates pos{startPos.x + (i*m_fadeDir), 0};
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NSFastLED::CRGB src(display->pixelAt(pos));
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display->pixelAt(pos) = NSFastLED::blend(NSFastLED::CRGB(blobColor), src, 200);
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}
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}
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};
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