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feat: dynamic color update to Ball based on velocity

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This commit is contained in:
Florian Sylvain
2025-05-11 04:36:24 +02:00
parent 509c6ceeca
commit 98c3bbf3f9
3 changed files with 48 additions and 3 deletions
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src/Ball.cpp
+45 -1
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@@ -9,7 +9,8 @@ Ball::Ball(float radius, const sf::Vector2f& pos, const sf::Vector2f& vel,
: m_radius(radius),
m_velocity(vel),
m_lastPosition(pos),
m_pixelVelocity(vel) {
m_pixelVelocity(vel),
m_baseColor(color) {
m_shape.setRadius(radius);
m_shape.setOrigin(sf::Vector2f(radius, radius));
m_shape.setPosition(pos);
@@ -25,9 +26,52 @@ void Ball::update(float dt, const sf::Vector2f& windowSize) {
m_pixelVelocity = (currentPosition - m_lastPosition) / dt;
m_lastPosition = currentPosition;
updateColor();
handleWallCollision(windowSize);
}
void Ball::updateColor() {
float speed =
std::sqrt(m_velocity.x * m_velocity.x + m_velocity.y * m_velocity.y);
const float MAX_SPEED = 2000.0f;
float t = std::min(speed / MAX_SPEED, 1.0f);
sf::Color targetColor;
if (t < 0.33f) {
float scaledT = t * 3.0f;
targetColor.r = static_cast<std::uint8_t>(0 + scaledT * 128);
targetColor.g = static_cast<std::uint8_t>(0);
targetColor.b = static_cast<std::uint8_t>(255);
} else if (t < 0.66f) {
float scaledT = (t - 0.33f) * 3.0f;
targetColor.r = static_cast<std::uint8_t>(128 + scaledT * 127);
targetColor.g = static_cast<std::uint8_t>(0 + scaledT * 165);
targetColor.b = static_cast<std::uint8_t>(255 - scaledT * 255);
} else {
float scaledT = (t - 0.66f) * 3.0f;
targetColor.r = static_cast<std::uint8_t>(255);
targetColor.g = static_cast<std::uint8_t>(165 - scaledT * 165);
targetColor.b = static_cast<std::uint8_t>(0);
}
sf::Color currentColor = m_shape.getFillColor();
const float TRANSITION_SPEED = 0.05f;
sf::Color newColor;
newColor.r = static_cast<std::uint8_t>(
currentColor.r + TRANSITION_SPEED * (targetColor.r - currentColor.r));
newColor.g = static_cast<std::uint8_t>(
currentColor.g + TRANSITION_SPEED * (targetColor.g - currentColor.g));
newColor.b = static_cast<std::uint8_t>(
currentColor.b + TRANSITION_SPEED * (targetColor.b - currentColor.b));
newColor.a = 255;
m_shape.setFillColor(newColor);
}
void Ball::draw(sf::RenderWindow& window) { window.draw(m_shape); }
void Ball::applyImpulse(const sf::Vector2f& impulse) {