void collideBallWithPaddle(Gem& ball, const Paddle& paddle) {
SpriteMatrix matrix = paddle.getSpriteMatrix();
// Left sphere
vec2 left = {-24, 0};
// Right sphere
vec2 right = {24, 0};
matrix.transform(&left.x, &left.y);
matrix.transform(&right.x, &right.y);
static const int PADDLE_RADIUS = 8;
fixed24_8 rel_ball_x = ball.pos_x - paddle.pos_x;
fixed24_8 rel_ball_y = ball.pos_y - paddle.pos_y;
vec2 rel_ball = {rel_ball_x.toFloat(), rel_ball_y.toFloat()};
vec2 nearest_point = pointLineSegmentNearestPoint(rel_ball, left, right);
vec2 penetration = rel_ball - nearest_point;
float d_sqr = length_sqr(penetration);
float r = PADDLE_RADIUS + Gem::RADIUS;
if (d_sqr < r*r) {
vec2 vel = {ball.vel_x.toFloat(), ball.vel_y.toFloat()};
int score_addition = static_cast<int>(ball.score_value * (ball.vel_y.toFloat() / 128.f));
ball.score_value = std::min(ball.score_value + std::max(score_addition, 0), Gem::MAX_VALUE);
float d = std::sqrt(d_sqr);
float sz = r - d;
vec2 normal = penetration / d;
fixed24_8 push_back_x(sz * normal.x);
fixed24_8 push_back_y(sz * normal.y);
ball.pos_x += push_back_x;
ball.pos_y += push_back_y;
vec2 par, perp;
splitVector(vel, normal, &par, &perp);
vel = perp - par;
ball.vel_x = fixed16_16(vel.x);
ball.vel_y = fixed16_16(vel.y);
}
}
void Drone::draw(SpriteBuffer& sprite_buffer, const Camera& camera) const {
Sprite drone_spr;
drone_spr.setImg(34, 1, 24, 24);
drone_spr.setPos(camera.transform(rb.pos));
SpriteMatrix matrix;
matrix.loadIdentity().rotate(angle);
sprite_buffer.append(drone_spr, matrix);
if (anim_flags.test(AnimationFlags::YELLOW_STROBE)) {
drone_spr.img_y = 1+1*25;
sprite_buffer.append(drone_spr, matrix);
}
if (anim_flags.test(AnimationFlags::RED_STROBE)) {
drone_spr.img_y = 1+2*25;
sprite_buffer.append(drone_spr, matrix);
}
}
void Ship::draw(SpriteBuffer& sprite_buffer, const Camera& camera) const {
Sprite ship_spr;
ship_spr.img = img_ship_body;
ship_spr.setPos(camera.transform(rb.pos));
SpriteMatrix matrix;
matrix.loadIdentity().rotate(rb.orientation);
sprite_buffer.append(ship_spr, matrix);
if (anim_flags.test(AnimationFlags::THRUST_FORWARD)) {
ship_spr.img = img_ship_thrust;
sprite_buffer.append(ship_spr, matrix);
}
if (anim_flags.test(AnimationFlags::INERTIAL_BRAKE)) {
ship_spr.img = img_ship_brake;
sprite_buffer.append(ship_spr, matrix);
}
shield.draw(sprite_buffer, ship_spr.x, ship_spr.y);
}