/** Rotates and turns the wheels appropriately, and adjust for suspension
* updates the speed-weighted objects' animations.
*
* \param dt time since last frame
* \param distance How far the wheels have rotated since last time.
* \param steer The actual steer settings.
* \param suspension Suspension height for all four wheels.
* \param speed The speed of the kart in meters/sec, used for the
* speed-weighted objects' animations
* \param current_lean_angle How much the kart is leaning (positive meaning
* left side down)
* \param gt_replay_index The index to get replay data, used by ghost kart
*/
void KartModel::update(float dt, float distance, float steer, float speed,
float current_lean_angle, int gt_replay_index)
{
core::vector3df wheel_steer(0, steer*30.0f, 0);
for(unsigned int i=0; i<4; i++)
{
if (!m_kart || !m_wheel_node[i]) continue;
#ifdef DEBUG
if (UserConfigParams::m_physics_debug &&
!m_kart->isGhostKart())
{
const btWheelInfo &wi = m_kart->getVehicle()->getWheelInfo(i);
// Make wheels that are not touching the ground invisible
m_wheel_node[i]->setVisible(wi.m_raycastInfo.m_isInContact);
}
#endif
core::vector3df pos = m_wheel_graphics_position[i].toIrrVector();
float suspension_length = 0.0f;
GhostKart* gk = dynamic_cast<GhostKart*>(m_kart);
// Prevent using m_default_physics_suspension uninitialized
if (gk && gt_replay_index == -1) break;
if (gk)
{
suspension_length = gk->getSuspensionLength(gt_replay_index, i);
}
else
{
suspension_length = m_kart->getVehicle()->getWheelInfo(i).
m_raycastInfo.m_suspensionLength;
}
// Check documentation of Kart::updateGraphics for the following line
pos.Y += m_default_physics_suspension[i]
- suspension_length
- m_kart_lowest_point;
// Adjust the wheel position for lean: the lean can cause the 'leaned
// to' side to be partly in the ground - which looks ok (like the tyres
// being compressed), but the other side will be in the air. To avoid
// this, increase the position of the wheels on the side that are
// higher in the ground so that the wheel still touch the ground.
if(current_lean_angle > 0 && (i&1) == 1) // i&1 == 0: left side
{
pos.Y -= 2*current_lean_angle;
}
else if (current_lean_angle < 0 && (i&1) == 0) // i&1 == 1: right side
{
pos.Y += 2*current_lean_angle;
}
m_wheel_node[i]->setPosition(pos);
// Now calculate the new rotation: (old + change) mod 360
float new_rotation = m_wheel_node[i]->getRotation().X
+ distance / m_wheel_graphics_radius[i] * RAD_TO_DEGREE;
new_rotation = fmodf(new_rotation, 360);
core::vector3df wheel_rotation(new_rotation, 0, 0);
// Only apply steer to first 2 wheels.
if (i < 2)
wheel_rotation += wheel_steer;
m_wheel_node[i]->setRotation(wheel_rotation);
} // for (i < 4)
// If animations are disabled, stop here
if (m_animated_node == NULL) return;
if (m_play_non_loop && m_animated_node->getLoopMode() == true)
{
m_play_non_loop = false;
this->setAnimation(AF_DEFAULT);
}
// Update the speed-weighted objects' animations
if (m_kart != NULL)
{
for (size_t i = 0; i < m_speed_weighted_objects.size(); i++)
{
SpeedWeightedObject& obj = m_speed_weighted_objects[i];
#define GET_VALUE(obj, value_name) \
obj.m_properties.value_name > SPEED_WEIGHTED_OBJECT_PROPERTY_UNDEFINED ? obj.m_properties.value_name : \
m_kart->getKartProperties()->getSpeedWeightedObjectProperties().value_name
// Animation strength
float strength = 1.0f;
const float strength_factor = GET_VALUE(obj, m_strength_factor);
if (strength_factor >= 0.0f)
{
strength = speed * strength_factor;
btClamp<float>(strength, 0.0f, 1.0f);
}
// Animation speed
const float speed_factor = GET_VALUE(obj, m_speed_factor);
if (speed_factor >= 0.0f)
{
float anim_speed = speed * speed_factor;
obj.m_node->setAnimationSpeed(anim_speed);
}
// Texture animation
core::vector2df tex_speed;
tex_speed.X = GET_VALUE(obj, m_texture_speed.X);
tex_speed.Y = GET_VALUE(obj, m_texture_speed.Y);
if (tex_speed != core::vector2df(0.0f, 0.0f))
{
obj.m_texture_cur_offset += speed * tex_speed * dt;
if (obj.m_texture_cur_offset.X > 1.0f) obj.m_texture_cur_offset.X = fmod(obj.m_texture_cur_offset.X, 1.0f);
if (obj.m_texture_cur_offset.Y > 1.0f) obj.m_texture_cur_offset.Y = fmod(obj.m_texture_cur_offset.Y, 1.0f);
for (unsigned int i = 0; i < obj.m_node->getMaterialCount(); i++)
{
video::SMaterial &irrMaterial = obj.m_node->getMaterial(i);
for (unsigned int j = 0; j < video::MATERIAL_MAX_TEXTURES; j++)
{
video::ITexture* t = irrMaterial.getTexture(j);
if (!t) continue;
core::matrix4 *m = &irrMaterial.getTextureMatrix(j);
m->setTextureTranslate(obj.m_texture_cur_offset.X, obj.m_texture_cur_offset.Y);
} // for j<MATERIAL_MAX_TEXTURES
} // for i<getMaterialCount
}
#undef GET_VALUE
}
}
// Check if the end animation is being played, if so, don't
// play steering animation.
if(m_current_animation!=AF_DEFAULT) return;
if(m_animation_frame[AF_LEFT]<0) return; // no animations defined
// Update animation if necessary
// -----------------------------
float frame;
if(steer>0.0f) frame = m_animation_frame[AF_STRAIGHT]
- ( ( m_animation_frame[AF_STRAIGHT]
-m_animation_frame[AF_RIGHT] )*steer);
else if(steer<0.0f) frame = m_animation_frame[AF_STRAIGHT]
+ ( (m_animation_frame[AF_STRAIGHT]
-m_animation_frame[AF_LEFT] )*steer);
else frame = (float)m_animation_frame[AF_STRAIGHT];
m_animated_node->setCurrentFrame(frame);
} // update
/** Rotates and turns the wheels appropriately, and adjust for suspension
+ updates the speed-weighted objects' animations.
* \param dt time since last frame
* \param rotation_dt How far the wheels have rotated since last time.
* \param steer The actual steer settings.
* \param suspension Suspension height for all four wheels.
* \param speed The speed of the kart in meters/sec, used for the
* speed-weighted objects' animations
*/
void KartModel::update(float dt, float rotation_dt, float steer, float speed)
{
core::vector3df wheel_steer(0, steer*30.0f, 0);
for(unsigned int i=0; i<4; i++)
{
if(!m_wheel_node[i]) continue;
const btWheelInfo &wi = m_kart->getVehicle()->getWheelInfo(i);
#ifdef DEBUG
if(UserConfigParams::m_physics_debug && m_kart)
{
// Make wheels that are not touching the ground invisible
m_wheel_node[i]->setVisible(wi.m_raycastInfo.m_isInContact);
}
#endif
float rel_suspension = wi.m_raycastInfo.m_suspensionLength
- m_default_physics_suspension[i];
// If the suspension is too compressed
if(rel_suspension< m_min_suspension[i])
rel_suspension = m_min_suspension[i];
else if(rel_suspension > m_max_suspension[i])
rel_suspension = m_max_suspension[i];
core::vector3df pos = m_wheel_graphics_position[i].toIrrVector();
pos.Y -= rel_suspension;
m_wheel_node[i]->setPosition(pos);
// Now calculate the new rotation: (old + change) mod 360
float new_rotation = m_wheel_node[i]->getRotation().X
+ rotation_dt * RAD_TO_DEGREE;
new_rotation = fmodf(new_rotation, 360);
core::vector3df wheel_rotation(new_rotation, 0, 0);
// Only apply steer to first 2 wheels.
if (i < 2)
wheel_rotation += wheel_steer;
m_wheel_node[i]->setRotation(wheel_rotation);
} // for (i < 4)
// If animations are disabled, stop here
if (m_animated_node == NULL) return;
// Update the speed-weighted objects' animations
for(size_t i=0 ; i < m_speed_weighted_objects.size() ; i++)
{
SpeedWeightedObject& obj = m_speed_weighted_objects[i];
#define GET_VALUE(obj, value_name) \
obj.m_properties.value_name > SPEED_WEIGHTED_OBJECT_PROPERTY_UNDEFINED ? obj.m_properties.value_name : \
m_kart->getKartProperties()->getSpeedWeightedObjectProperties().value_name
// Animation strength
float strength = 1.0f;
const float strength_factor = GET_VALUE(obj, m_strength_factor);
if(strength_factor >= 0.0f)
{
strength = speed * strength_factor;
btClamp<float>(strength, 0.0f, 1.0f);
}
// Animation speed
const float speed_factor = GET_VALUE(obj, m_speed_factor);
if(speed_factor >= 0.0f)
{
float anim_speed = speed * speed_factor;
obj.m_node->setAnimationSpeed(anim_speed);
}
// Texture animation
core::vector2df tex_speed;
tex_speed.X = GET_VALUE(obj, m_texture_speed.X);
tex_speed.Y = GET_VALUE(obj, m_texture_speed.Y);
if(tex_speed != core::vector2df(0.0f, 0.0f))
{
obj.m_texture_cur_offset += speed * tex_speed * dt;
if(obj.m_texture_cur_offset.X > 1.0f) obj.m_texture_cur_offset.X = fmod(obj.m_texture_cur_offset.X, 1.0f);
if(obj.m_texture_cur_offset.Y > 1.0f) obj.m_texture_cur_offset.Y = fmod(obj.m_texture_cur_offset.Y, 1.0f);
for(unsigned int i=0; i<obj.m_node->getMaterialCount(); i++)
{
video::SMaterial &irrMaterial=obj.m_node->getMaterial(i);
for(unsigned int j=0; j<video::MATERIAL_MAX_TEXTURES; j++)
{
video::ITexture* t=irrMaterial.getTexture(j);
if(!t) continue;
core::matrix4 *m = &irrMaterial.getTextureMatrix(j);
m->setTextureTranslate(obj.m_texture_cur_offset.X, obj.m_texture_cur_offset.Y);
} // for j<MATERIAL_MAX_TEXTURES
} // for i<getMaterialCount
}
#undef GET_VALUE
}
// Check if the end animation is being played, if so, don't
// play steering animation.
if(m_current_animation!=AF_DEFAULT) return;
if(m_animation_frame[AF_LEFT]<0) return; // no animations defined
// Update animation if necessary
// -----------------------------
float frame;
if(steer>0.0f) frame = m_animation_frame[AF_STRAIGHT]
- ( ( m_animation_frame[AF_STRAIGHT]
-m_animation_frame[AF_RIGHT] )*steer);
else if(steer<0.0f) frame = m_animation_frame[AF_STRAIGHT]
+ ( (m_animation_frame[AF_STRAIGHT]
-m_animation_frame[AF_LEFT] )*steer);
else frame = (float)m_animation_frame[AF_STRAIGHT];
m_animated_node->setCurrentFrame(frame);
} // update