////////////////////////////////////////////////////////////
// Check for collisions with rocks
////////////////////////////////////////////////////////////
void CheckCollisions(R3Scene *scene)
{
const double MOVEMENT_WEIGHT = 0.02;
// check each bobsled - //TODO CHANGE THIS WHEN WE HAVE MULTIPLE BOBSLEDS
for (unsigned int i = 0; i < 1; i++)
{
R3Bobsled *bobsled = scene->bobsleds[i];
bobsled->x_vibration = 0.0;
R3Box &bbox = bobsled->sleds[0]->mesh->bbox;
// printf("bobsled: %f %f %f %f %f %f\n", bbox.XMin(), bbox.XMax(), bbox.YMin(), bbox.YMax(), bbox.ZMin(), bbox.ZMax());
// check each obstacle for a collision
for (unsigned int j = 0; j < scene->obstacles.size(); j++)
{
R3Obstacle *obstacle = scene->obstacles[j];
R3Box intersection = bbox;
R3Box *obstacle_box = ObstacleBBox(obstacle);
intersection.Intersect(*obstacle_box);
if (intersection.XMin() < intersection.XMax() &&
intersection.YMin() < intersection.YMax() &&
intersection.ZMin() < intersection.ZMax())
{
double current_z = bobsled->velocity.Z();
// slow down
if (obstacle->hit_count == 0 && abs(current_z) > 40)
bobsled->velocity.SetZ(current_z * 0.6);
// add left-to-right vibration if this is a rock
if (obstacle->type == OBSTACLE_ROCK)
{
if (obstacle->hit_count - 2 * ((int) obstacle->hit_count / 2) == 0)
bobsled->x_vibration = MOVEMENT_WEIGHT * (1 + Rand());
else
bobsled->x_vibration = - MOVEMENT_WEIGHT * (1 + Rand());
}
obstacle->hit_count++;
}
delete obstacle_box;
}
}
}
