void GridModel::draw(const core::visual::VisualParams* vparams)
{
if (!isActive() || !((getNext()==NULL)?vparams->displayFlags().getShowCollisionModels():vparams->displayFlags().getShowBoundingCollisionModels())) return;
glDisable(GL_LIGHTING);
int level=0;
CollisionModel* m = getPrevious();
float color = 1.0f;
while (m!=NULL)
{
m = m->getPrevious();
++level;
color *= 0.5f;
}
if (isSimulated())
glColor4f(1.0f, 1.0f, 1.0f, color);
else
glColor4f(1.0f, 1.0f, 0.0f, color);
if (color < 1.0f)
{
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask(0);
}
for (int i=0;i<size;i++)
{
draw(vparams,i);
}
if (color < 1.0f)
{
glDisable(GL_BLEND);
glDepthMask(1);
}
if (getPrevious()!=NULL)
getPrevious()->draw(vparams);
}
void CubeModel::draw(const core::visual::VisualParams* vparams)
{
if (!isActive() || !((getNext()==NULL)?vparams->displayFlags().getShowCollisionModels():vparams->displayFlags().getShowBoundingCollisionModels())) return;
int level=0;
CollisionModel* m = getPrevious();
float color = 1.0f;
while (m!=NULL)
{
m = m->getPrevious();
++level;
color *= 0.5f;
}
Vec<4,float> c;
if (isSimulated())
c=Vec<4,float>(1.0f, 1.0f, 1.0f, color);
else
c=Vec<4,float>(1.0f, 1.0f, 1.0f, color);
std::vector< Vector3 > points;
for (int i=0; i<size; i++)
{
const Vector3& vmin = elems[i].minBBox;
const Vector3& vmax = elems[i].maxBBox;
points.push_back(Vector3(vmin[0], vmin[1], vmin[2]));
points.push_back(Vector3(vmin[0], vmin[1], vmax[2]));
points.push_back(Vector3(vmin[0], vmax[1], vmin[2]));
points.push_back(Vector3(vmin[0], vmax[1], vmax[2]));
points.push_back(Vector3(vmax[0], vmin[1], vmin[2]));
points.push_back(Vector3(vmax[0], vmin[1], vmax[2]));
points.push_back(Vector3(vmax[0], vmax[1], vmin[2]));
points.push_back(Vector3(vmax[0], vmax[1], vmax[2]));
points.push_back(Vector3(vmin[0], vmin[1], vmin[2]));
points.push_back(Vector3(vmin[0], vmax[1], vmin[2]));
points.push_back(Vector3(vmin[0], vmin[1], vmax[2]));
points.push_back(Vector3(vmin[0], vmax[1], vmax[2]));
points.push_back(Vector3(vmax[0], vmin[1], vmin[2]));
points.push_back(Vector3(vmax[0], vmax[1], vmin[2]));
points.push_back(Vector3(vmax[0], vmin[1], vmax[2]));
points.push_back(Vector3(vmax[0], vmax[1], vmax[2]));
points.push_back(Vector3(vmin[0], vmin[1], vmin[2]));
points.push_back(Vector3(vmax[0], vmin[1], vmin[2]));
points.push_back(Vector3(vmin[0], vmax[1], vmin[2]));
points.push_back(Vector3(vmax[0], vmax[1], vmin[2]));
points.push_back(Vector3(vmin[0], vmin[1], vmax[2]));
points.push_back(Vector3(vmax[0], vmin[1], vmax[2]));
points.push_back(Vector3(vmin[0], vmax[1], vmax[2]));
points.push_back(Vector3(vmax[0], vmax[1], vmax[2]));
}
vparams->drawTool()->drawLines(points, 1, Vec<4,float>(c));
if (getPrevious()!=NULL)
getPrevious()->draw(vparams);
}
Vector3f SlideMove(
const Vector3f & footPos,
const float eyeHeight,
const Vector3f & moveDirection,
const float moveDistance,
const CollisionModel & collisionModel,
const CollisionModel & groundCollisionModel
)
{
// Check for collisions at eye level to prevent slipping under walls.
Vector3f eyePos = footPos + UpVector * eyeHeight;
// Pop out of any collision models.
collisionModel.PopOut( eyePos );
{
Planef fowardCollisionPlane;
float forwardDistance = moveDistance;
if ( !collisionModel.TestRay( eyePos, moveDirection, forwardDistance, &fowardCollisionPlane ) )
{
// No collision, move the full distance.
eyePos += moveDirection * moveDistance;
}
else
{
// Move up to the point of collision.
eyePos += moveDirection * forwardDistance;
// Project the remaining movement onto the collision plane.
const float COLLISION_BOUNCE = 0.001f; // don't creep into the plane due to floating-point rounding
const float intoPlane = moveDirection.Dot( fowardCollisionPlane.N ) - COLLISION_BOUNCE;
const Vector3f slideDirection = ( moveDirection - fowardCollisionPlane.N * intoPlane );
// Try to finish the move by sliding along the collision plane.
float slideDistance = moveDistance;
collisionModel.TestRay( eyePos - UpVector * RailHeight, slideDirection, slideDistance, NULL );
eyePos += slideDirection * slideDistance;
}
}
if ( groundCollisionModel.Polytopes.GetSizeI() != 0 )
{
// Check for collisions at foot level, which allows following terrain.
float downDistance = 10.0f;
groundCollisionModel.TestRay( eyePos, - UpVector, downDistance, NULL );
// Maintain the minimum camera height.
if ( eyeHeight - downDistance < 1.0f )
{
eyePos += UpVector * ( eyeHeight - downDistance );
}
}
return eyePos - UpVector * eyeHeight;
}
std::pair<bool, Real>
doPicking(const Ogre::Ray& localRay, const CollisionModel& collisionModel, CullingMode cullingMode)
{
// Convert our ray to Opcode ray
IceMaths::Ray world_ray(
IceMaths::Point(localRay.getOrigin().x, localRay.getOrigin().y, localRay.getOrigin().z),
IceMaths::Point(localRay.getDirection().x, localRay.getDirection().y, localRay.getDirection().z));
// Be aware we store triangle as ccw in collision mode, and Opcode treat it as cw,
// so need to inverse cull mode here.
Opcode::CullMode cullMode;
switch (cullingMode)
{
default:
case CULL_NONE:
cullMode = Opcode::CULLMODE_NONE;
break;
case CULL_CLOCKWISE:
cullMode = Opcode::CULLMODE_CCW;
break;
case CULL_ANTICLOCKWISE:
cullMode = Opcode::CULLMODE_CW;
break;
}
// Cull mode callback for Opcode
struct Local
{
static Opcode::CullMode cullModeCallback(udword triangle_index, void* user_data)
{
return (Opcode::CullMode) (int) user_data;
}
};
std::pair<bool, Real> ret;
// Do picking
Opcode::CollisionFace picked_face;
ret.first = Opcode::Picking(picked_face,
world_ray, collisionModel.getOpcodeModel(), 0,
0, FLT_MAX,
world_ray.mOrig,
&Local::cullModeCallback, (void*) (int) cullMode);
ret.second = ret.first ? picked_face.mDistance : 0;
return ret;
}
std::pair<bool, Real>
rayCollide(const Ogre::Ray& ray,
Ogre::MovableObject* movable,
bool accurate,
CullingMode cullingMode,
bool allowAnimable)
{
// Get local space axis aligned bounding box
const Ogre::AxisAlignedBox& aabb = movable->getBoundingBox();
// Matrix4 to transform local space to world space
const Ogre::Matrix4& localToWorld = movable->_getParentNodeFullTransform();
// Matrix4 to transform world space to local space
Ogre::Matrix4 worldToLocal = localToWorld.inverse();
// Matrix3 to transform world space normal to local space
Ogre::Matrix3 worldToLocalN;
worldToLocal.extract3x3Matrix(worldToLocalN);
// Convert world space ray to local space ray
// Note:
// By preserving the scale between world space and local space of the
// direction, we don't need to recalculate the distance later.
Ogre::Ray localRay;
localRay.setOrigin(worldToLocal * ray.getOrigin());
localRay.setDirection(worldToLocalN * ray.getDirection());
// Intersect with axis aligned bounding box, but because we transformed
// ray to local space of the bounding box, so this test just like test
// with oriented bounding box.
std::pair<bool, Real> ret = localRay.intersects(aabb);
// Do accurate test if hitted bounding box and user required.
if (ret.first && accurate)
{
if (movable->getMovableType() == Ogre::EntityFactory::FACTORY_TYPE_NAME ||
allowAnimable && movable->getMovableType() == Ogre::AutoAnimationEntityFactory::FACTORY_TYPE_NAME)
{
Ogre::Entity* entity = static_cast<Ogre::Entity*>(movable);
if (!entity->_isAnimated())
{
// Static entity
// Get the entity mesh
const Ogre::MeshPtr& mesh = entity->getMesh();
// Get the collision mode
CollisionModelPtr collisionModel = CollisionModelManager::getSingleton().getCollisionModel(mesh);
ret = doPicking(localRay, *collisionModel, cullingMode);
}
else if (allowAnimable)
{
// Animation entity
bool addedSoftwareAnimation = false;
if (entity->getSoftwareAnimationRequests() <= 0)
{
entity->addSoftwareAnimationRequest(false);
entity->_updateAnimation();
addedSoftwareAnimation = true;
}
CollisionModel collisionModel;
collisionModel.addEntity(entity);
collisionModel.build(true);
ret = doPicking(localRay, collisionModel, cullingMode);
if (addedSoftwareAnimation)
{
entity->removeSoftwareAnimationRequest(false);
}
}
}
}
return ret;
}
