//---------------------------
//
//---------------------------
void Matrix44::SetView( const Vector3& vPos, const Vector3& vDir_, const Vector3& vUp_ )
{
Vector3 vDir;
Vector3 vUp;
Vector3 vCross;
vDir = vDir_.Normal();
vCross = vUp_.CrossProduct( vDir );
vCross.Normalize();
vUp = vDir.CrossProduct( vCross );
_11 = vCross.x;
_12 = vUp.x;
_13 = vDir.x;
_14 = 0.0F;
_21 = vCross.y;
_22 = vUp.y;
_23 = vDir.y;
_24 = 0.0F;
_31 = vCross.z;
_32 = vUp.z;
_33 = vDir.z;
_34 = 0.0F;
_41 = -vPos.DotProduct( vCross );
_42 = -vPos.DotProduct( vUp );
_43 = -vPos.DotProduct( vDir );
_44 = 1.0F;
} //Matrix44::SetView
void ComputeLefUpForward(Vector3& o_left, Vector3& o_up, Vector3& o_forward, const Vector3& i_position, const Vector3& i_target)
{
// compute the forward vector
o_forward = i_target - i_position;
o_forward.Normalize();
// compute temporal up vector based on the forward vector
// watch out when look up/down at 90 degree
// for example, forward vector is on the Y axis
if (fabs(o_forward[0]) < Math::EPSILON && fabs(o_forward[2]) < Math::EPSILON)
{
// forward vector is pointing +Y axis
if (o_forward[1] > 0)
o_up = Vector3 { 0, 0, -1 };
// forward vector is pointing -Y axis
else
o_up = Vector3 { 0, 0, 1 };
}
// in general, up vector is straight up
else
{
o_up = Vector3 { 0, 1, 0 };
}
// compute the left vector
o_left = o_up.CrossProduct(o_forward); // cross product
o_left.Normalize();
// re-calculate the orthonormal up vector
o_up = o_forward.CrossProduct(o_left); // cross product
o_up.Normalize();
}
Matrix4 Matrix4::CreateLookAtRightHanded(Vector3& position, Vector3& lookAt, Vector3& upVector)
{
Matrix4 perspective = Matrix4::Zero();
Vector3 forward = (lookAt - position).Normalize();
Vector3 right = upVector.CrossProduct(forward).Normalize();
Vector3 up = forward.CrossProduct(right).Normalize();
perspective[0][0] = -right.GetX();
perspective[1][0] = -right.GetY();
perspective[2][0] = -right.GetZ();
perspective[3][0] = right.ScalarProduct(position);
perspective[0][1] = up.GetX();
perspective[1][1] = up.GetY();
perspective[2][1] = up.GetZ();
perspective[3][1] = -up.ScalarProduct(position);
perspective[0][2] = -forward.GetX();
perspective[1][2] = -forward.GetY();
perspective[2][2] = -forward.GetZ();
perspective[3][2] = forward.ScalarProduct(position);
perspective[0][3] = 0.0f;
perspective[1][3] = 0.0f;
perspective[2][3] = 0.0f;
perspective[3][3] = 1.0f;
return perspective;
}
bool Quaternion::FromLookRotation(const Vector3& direction, const Vector3& upDirection)
{
Quaternion ret;
Vector3 forward = direction.Normalized();
Vector3 v = forward.CrossProduct(upDirection);
// If direction & upDirection are parallel and crossproduct becomes zero, use FromRotationTo() fallback
if (v.LengthSquared() >= M_EPSILON)
{
v.Normalize();
Vector3 up = v.CrossProduct(forward);
Vector3 right = up.CrossProduct(forward);
ret.FromAxes(right, up, forward);
}
else
ret.FromRotationTo(Vector3::FORWARD, forward);
if (!ret.IsNaN())
{
(*this) = ret;
return true;
}
else
return false;
}
void Matrix44::SetView( const Vector3& pos, const Vector3& dir0, const Vector3& up0 )
{
Vector3 vDir;
Vector3 vUp;
Vector3 vCross;
vDir = dir0.Normal();
vCross = up0.CrossProduct( vDir );
vCross.Normalize();
vUp = vDir.CrossProduct( vCross );
_11 = vCross.x;
_12 = vUp.x;
_13 = vDir.x;
_14 = 0.0f;
_21 = vCross.y;
_22 = vUp.y;
_23 = vDir.y;
_24 = 0.0f;
_31 = vCross.z;
_32 = vUp.z;
_33 = vDir.z;
_34 = 0.0f;
_41 = -pos.DotProduct( vCross );
_42 = -pos.DotProduct( vUp );
_43 = -pos.DotProduct( vDir );
_44 = 1.0f;
}
void Node::LookAt(const Vector3& target, const Vector3& upAxis)
{
Vector3 targetZ = (target - GetWorldPosition()).Normalized();
Vector3 targetX = upAxis.CrossProduct(targetZ).Normalized();
Vector3 targetY = targetZ.CrossProduct(targetX).Normalized();
Quaternion rotation(targetX, targetY, targetZ);
SetRotation(parent_ ? parent_->GetWorldRotation().Inverse() * rotation : rotation);
}
//! rotates a vector
Vector3 Quaternion::Rotate(const Vector3& v) const
{
// Irrlicht / nVidia SDK implementation
Vector3 qvec = V;
Vector3 uv = qvec.CrossProduct(v);
Vector3 uuv = qvec.CrossProduct(uv);
uv *= (2.0f * W);
uuv *= 2.0f;
return v + uv + uuv;
}
void Quaternion::FromLookRotation(const Vector3& direction, const Vector3& upDirection)
{
Vector3 forward = direction.Normalized();
Vector3 v = forward.CrossProduct(upDirection).Normalized();
Vector3 up = v.CrossProduct(forward);
Vector3 right = up.CrossProduct(forward);
Quaternion ret;
ret.w_ = sqrtf(1.0f + right.x_ + up.y_ + forward.z_) * 0.5f;
float w4Recip = 1.0f / (4.0f * ret.w_);
ret.x_ = (up.z_ - forward.y_) * w4Recip;
ret.y_ = (forward.x_ - right.z_) * w4Recip;
ret.z_ = (right.y_ - up.x_) * w4Recip;
(*this) = ret;
}
void ParticleLayer3D::CalcLong(Particle* current,
Vector3& topLeft,
Vector3& topRight,
Vector3& botLeft,
Vector3& botRight)
{
Vector3 currDirection;
Particle* parent = emitter->GetParentParticle();
if ((NULL != parent)&&inheritPosition)
{
currDirection = current->speed*current->velocityOverLife + parent->speed*parent->velocityOverLife;
}else
{
currDirection = current->speed;
}
currDirection.Normalize();
Vector3 vecShort = currDirection.CrossProduct(direction);
vecShort.Normalize();
//Vector3 vecLong = vecShort.CrossProduct(direction);
Vector3 vecLong = -currDirection*(scaleVelocityBase+scaleVelocityFactor*current->speed);
vecShort /= 2.f;
float32 widthDiv2 = sprite->GetWidth()*current->size.x*current->sizeOverLife.x/2;
float32 heightDiv2 = sprite->GetHeight()*current->size.y*current->sizeOverLife.y/2;
// Apply offset to the current position according to the emitter position.
UpdateCurrentParticlePosition(current);
topRight = currentParticlePosition + widthDiv2*vecShort - heightDiv2/2*vecLong;
topLeft = currentParticlePosition - widthDiv2*vecShort - heightDiv2/2*vecLong;
botRight = topRight + heightDiv2*vecLong;
botLeft = topLeft + heightDiv2*vecLong;
}
void Node::LookAt(const Vector3& target, const Vector3& upAxis, bool worldSpace)
{
Vector3 targetZ;
if (worldSpace)
targetZ = (target - GetWorldPosition()).Normalized();
else
targetZ = (target - position_).Normalized();
Vector3 targetX = upAxis.CrossProduct(targetZ).Normalized();
Vector3 targetY = targetZ.CrossProduct(targetX).Normalized();
if (!worldSpace || !parent_)
SetRotation(Quaternion(targetX, targetY, targetZ));
else
SetRotation(parent_->GetWorldRotation().Inverse() * Quaternion(targetX, targetY, targetZ));
}
void Quaternion::FromRotationTo(const Vector3& start, const Vector3& end)
{
Vector3 normStart = start.Normalized();
Vector3 normEnd = end.Normalized();
float d = normStart.DotProduct(normEnd);
if (d > -1.0f + M_EPSILON)
{
Vector3 c = normStart.CrossProduct(normEnd);
float s = sqrtf((1.0f + d) * 2.0f);
float invS = 1.0f / s;
x_ = c.x_ * invS;
y_ = c.y_ * invS;
z_ = c.z_ * invS;
w_ = 0.5f * s;
}
else
{
Vector3 axis = Vector3::RIGHT.CrossProduct(normStart);
if (axis.Length() < M_EPSILON)
axis = Vector3::UP.CrossProduct(normStart);
FromAngleAxis(180.f, axis);
}
}
Matrix4& Matrix4::LookAtLH( const Vector3& eye, const Vector3& at, const Vector3& up )
{
Vector3 zaxis = at - eye;
zaxis.Normalize();
Vector3 nup = up;
nup.Normalize();
Vector3 xaxis = zaxis.CrossProduct( nup );
Vector3 yaxis = xaxis.CrossProduct( zaxis );
A[0][0] = xaxis.X; A[1][0] = xaxis.Y; A[2][0] = xaxis.Z; A[3][0] = 0.0f;
A[0][1] = yaxis.X; A[1][1] = yaxis.Y; A[2][1] = yaxis.Z; A[3][1] = 0.0f;
A[0][2] = zaxis.X; A[1][2] = zaxis.Y; A[2][2] = zaxis.Z; A[3][2] = 0.0f;
A[0][3] = -xaxis.DotProduct( eye ); A[1][3] = -yaxis.DotProduct( eye ); A[2][3] = -zaxis.DotProduct( eye ); A[3][3] = 1.0f;
return *this;
}
void WorldNode::SetDirection(const Vector3& Direction, const Mezzanine::TransformSpace& TS, const Vector3& LocalAxis)
{
static const Vector3 Zero(0,0,0);
if(Direction == Zero)
return;
Vector3 NormalizedDir = Direction.GetNormal();
switch(TS)
{
default:
case Mezzanine::TS_World:
{
// Do nothing
break;
}
case Mezzanine::TS_Local:
{
NormalizedDir = GetOrientation() * NormalizedDir;
break;
}
case Mezzanine::TS_Parent:
{
if(Parent) NormalizedDir = Parent->GetOrientation() * NormalizedDir;
else return; /// @todo May want to change this to an exception, maybe.
break;
}
}
Quaternion FinalOrientation;
if(FixedYaw)
{
Vector3 XVec = FixedYawAxis.CrossProduct(NormalizedDir);
XVec.Normalize();
Vector3 YVec = NormalizedDir.CrossProduct(XVec);
YVec.Normalize();
Quaternion ZToTarget(XVec,YVec,NormalizedDir);
if(LocalAxis == Vector3::Neg_Unit_Z())
{
FinalOrientation.SetValues(-ZToTarget.Y,-ZToTarget.Z,ZToTarget.W,ZToTarget.X);
}else{
FinalOrientation = ZToTarget * (LocalAxis.GetRotationToAxis(Vector3::Unit_Z()));
}
}else{
Quaternion CurrOri = GetOrientation();
Vector3 CurrDir = CurrOri * LocalAxis;
if( (CurrDir+NormalizedDir).SquaredLength() < 0.00005 )
{
FinalOrientation.SetValues(-CurrOri.Y,-CurrOri.Z,CurrOri.W,CurrOri.X);
}else{
FinalOrientation = (CurrDir.GetRotationToAxis(NormalizedDir)) * CurrOri;
}
}
SetOrientation(FinalOrientation);
}
Vector3 Vector3::Reflect(const Vector3& n) const
{
Vector3 result;
//TODO: Calculate the reflection of this vector given the input normal n
//Store the result in result
// DONE
return n.CrossProduct(*this).CrossProduct(n) * 2.f - *this;
}
void RigidBody::AddForceAtPoint(const Vector3& force, const Point3& point)
{
Vector3 pointCrossForce;
Vector3 posAsVec = m_Pos.ToVector3();
Vector3 pointRelative = point.ToVector3().Subtract(posAsVec);
m_ForceAccum = m_ForceAccum.Add(force);
pointCrossForce = pointRelative.CrossProduct(force);
m_TorqueAccum = m_TorqueAccum.Add(pointCrossForce);
}
void SoundSystem::SetListenerOrientation(const Vector3 & at, const Vector3 & left)
{
Vector3 atNorm = at;
atNorm.Normalize();
Vector3 upNorm = at.CrossProduct(left);
upNorm.Normalize();
FMOD_VECTOR fmodAt = {atNorm.x, atNorm.y, atNorm.z};
FMOD_VECTOR fmodUp = {upNorm.x, upNorm.y, upNorm.z};
FMOD_VERIFY(fmodEventSystem->set3DListenerAttributes(0, 0, 0, &fmodAt, &fmodUp));
}
void Camera::LookAt(const Vector3& eye, const Vector3& center, const Vector3& up)
{
mPosition = eye;
mCenter = center;
mUp = up;
// http://www.opengl.org/wiki/GluLookAt_code
const Vector3 forward = (center - eye).GetNormalized();
const Vector3 side = (forward.CrossProduct(up)).GetNormalized();
const Vector3 newUp = side.CrossProduct(forward).GetNormalized();
mViewMatrix = Matrix4x4(side.X, newUp.X, -forward.X, 0.0f,
side.Y, newUp.Y, -forward.Y, 0.0f,
side.Z, newUp.Z, -forward.Z, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
mViewMatrix.Translate(eye * -1.0f);
mViewFrustum.LookAt(eye, center, up);
}
/**
* @brief
* Calculate the intersection of a ray and a triangle
*/
dFloat BodyTerrain::RayCastTriangle(const Vector3 &p0, const Vector3 &dp, const Vector3 &origin, const Vector3 &e1, const Vector3 &e2)
{
dFloat t;
dFloat b0;
dFloat b1;
dFloat b00;
dFloat b11;
dFloat a00;
dFloat a10;
dFloat a11;
dFloat det;
dFloat dot;
dFloat tol;
// Clip line again first triangle
Vector3 normal(e2.CrossProduct(e1));
dot = normal.DotProduct(dp);
if (dot <= 1.0e-6f) {
t = ((origin - p0).DotProduct(normal)) / dot;
if (t > 0.0f) {
if (t < 1.0f) {
Vector3 q = p0 + dp*t;
a00 = e1.DotProduct(e1);
a11 = e2.DotProduct(e2);
a10 = e1.DotProduct(e2);
det = a00*a11 - a10*a10;
// det must be positive and different than zero
// _ASSERTE(det > 0.0f);
Vector3 q0p0 = q - origin;
b0 = q0p0.DotProduct(e1);
b1 = q0p0.DotProduct(e2);
tol = -det*1.0e-3f;
b00 = b0*a11 - b1*a10;
if (b00 >= tol) {
b11 = b1*a00 - b0*a10;
if (b11 >= tol) {
if ((b00 + b11) <= (det*1.001f)) {
// Found a hit return this value
return t;
}
}
}
}
}
}
// If it come here the there no intersection
return 1.2f;
}
//! constructor
Frustum::Frustum(f32 fFov, f32 fRatio, f32 fNear, f32 fFar, const Vector3& vPosition, const Vector3& vLookAt, const Vector3& vUp)
{
f32 Hnear = Math::Tan(fFov * Math::DegToRadFactor / 2) * fNear;
f32 Wnear = Hnear * fRatio;
f32 Hfar = Math::Tan(fFov * Math::DegToRadFactor / 2) * fFar;
f32 Wfar = Hfar * fRatio;
Vector3 vDirection = (vLookAt-vPosition).Normalize();
Vector3 vRight = vDirection.CrossProduct(vUp).Normalize();
Vector3 vLocalUp = vRight.CrossProduct(vDirection).Normalize();
Vector3 FCenter = vPosition + vDirection * fFar;
Vector3 FTopLeft = FCenter + (vLocalUp * Hfar) - (vRight * Wfar);
Vector3 FTopRight = FCenter + (vLocalUp * Hfar) + (vRight * Wfar);
Vector3 FBottomLeft = FCenter - (vLocalUp * Hfar) - (vRight * Wfar);
Vector3 FBottomRight = FCenter - (vLocalUp * Hfar) + (vRight * Wfar);
Vector3 NCenter = vPosition + vDirection * fNear;
Vector3 NTopLeft = NCenter + (vLocalUp * Hnear) - (vRight * Wnear);
Vector3 NTopRight = NCenter + (vLocalUp * Hnear) + (vRight * Wnear);
Vector3 NBottomLeft = NCenter- (vLocalUp * Hnear) - (vRight * Wnear);
Vector3 NBottomRight = NCenter - (vLocalUp * Hnear) + (vRight * Wnear);
m_Planes[P_Top] = Plane(NTopLeft, FTopLeft, FTopRight);
m_Planes[P_Bottom] = Plane(NBottomRight, FBottomRight, FBottomLeft);
m_Planes[P_Left] = Plane(FBottomLeft, FTopLeft, NTopLeft);
m_Planes[P_Right] = Plane(NBottomRight, NTopRight, FTopRight);
m_Planes[P_Near] = Plane(NBottomLeft, NTopLeft, NTopRight);
m_Planes[P_Far] = Plane(FBottomRight, FTopRight, FTopLeft);
#ifdef SHOOT_EDITOR
m_FTopLeft = FTopLeft;
m_FTopRight = FTopRight;
m_FBottomLeft = FBottomLeft;
m_FBottomRight = FBottomRight;
m_NTopLeft = NTopLeft;
m_NTopRight = NTopRight;
m_NBottomLeft = NBottomLeft;
m_NBottomRight = NBottomRight;
#endif // SHOOT_EDITOR
}
Matrix4 Matrix4::GenerateOrthogonalBaseFromAxis(const Vector3 &aAxis)
{
Vector3 FirstVector = aAxis.NormalisedCopy();
Vector3 SecondVector;
Vector3 ThirdVector;
if(aAxis != Vector3::UnitX)
{
SecondVector = Vector3::UnitX;
}
else
{
SecondVector = Vector3::UnitY;
}
ThirdVector = FirstVector.CrossProduct(SecondVector).NormalisedCopy();
SecondVector = FirstVector.CrossProduct(ThirdVector).NormalisedCopy();
return Matrix4( SecondVector.X(), SecondVector.Y(), SecondVector.Z(), 0,
FirstVector.X(), FirstVector.Y(), FirstVector.Z(), 0,
ThirdVector.X(), ThirdVector.Y(), ThirdVector.Z(), 0,
0, 0, 0, 1);
}
void Triangle::SetTriangle(Vector3 v0, Vector3 v1, Vector3 v2)
{
m_vertices[0] = v0;
m_vertices[1] = v1;
m_vertices[2] = v2;
//Calculate Normal
Vector3 NormalA = m_vertices[1] - m_vertices[0];
Vector3 NormalB = m_vertices[2] - m_vertices[0];
Vector3 Norm = NormalA.CrossProduct(NormalB);
Norm.Normalise();
m_normal = Norm;
}
// ----------------------------------------------------------------------------
Vector3 Face::Intersect(const Vector3& origin, const Vector3& direction) const
{
#define NO_INTERSECTION Vector3(-1, -1, -1)
#define DO_CULL 0
// Algorithm taken from:
// "Fast, Minimum Storage Ray/Triangle Intersection"
// See doc/research/
Vector3 edge1 = vertex_[1]->position_ - vertex_[0]->position_;
Vector3 edge2 = vertex_[2]->position_ - vertex_[0]->position_;
Vector3 p = direction.CrossProduct(edge2);
float determinant = p.DotProduct(edge1);
#if DO_CULL
if(determinant == 0.0f)
return NO_INTERSECTION;
#endif
Vector3 ray = origin - vertex_[0]->position_;
float u = p.DotProduct(ray);
#if DO_CULL
if(u < 0.0f || u > determinant)
return NO_INTERSECTION;
#endif
Vector3 q = ray.CrossProduct(edge1);
float v = q.DotProduct(direction);
#if DO_CULL
if(v < 0.0f || v > determinant)
return NO_INTERSECTION;
#endif
determinant = 1.0f / determinant;
u *= determinant;
v *= determinant;
return Vector3(1.0f - u - v, u, v);
}
//---------------------------
//
//---------------------------
void Matrix44::SetWorld( const Vector3& vPos, const Vector3& vINDir, const Vector3& vINUp )
{
Vector3 vDir = vINDir.Normal();
Vector3 vCross = vINUp.CrossProduct( vDir ).Normal();
Vector3 vUp = vDir.CrossProduct( vCross );
_11 = vCross.x;
_12 = vCross.y;
_13 = vCross.z;
_14 = 0.0F;
_21 = vUp.x;
_22 = vUp.y;
_23 = vUp.z;
_24 = 0.0F;
_31 = vDir.x;
_32 = vDir.y;
_33 = vDir.z;
_34 = 0.0F;
_41 = vPos.x;
_42 = vPos.y;
_43 = vPos.z;
_44 = 1.0F;
} //Matrix44::SetWorld
//////////////////////////////////////////////////////////////////////////
/// Rotate the camera.
///
/// @param [in] yaw movement delta on X
/// @param [in] pitch movement delta on Y
///
/// @remark this version of rotation rotate using floats.
///
/// This function doesn't return a value
//////////////////////////////////////////////////////////////////////////
void Camera::Rotate(VCNFloat yaw, VCNFloat pitch)
{
Vector3 vAxis = mFocus - mPosition;
vAxis = vAxis.CrossProduct(mUp).Normalized();
RotateView(pitch, vAxis.x, vAxis.y, vAxis.z);
// Prevent head and feet angles
if ( VCN::Abs(mDir.DotProduct(mUp)) > BLOCK_ANGLE )
{
RotateView(-pitch, vAxis.x, vAxis.y, vAxis.z);
}
RotateView(yaw, mUp.x, mUp.y, mUp.z);
}
void ModelLoader::GenerateNormals()
{
mVertReferences.resize(mVertices.size());
for(unsigned int i = 0; i < mCombinedVertices.size(); ++i)
{
//Assign every vertice to their respective triangle(s).
mVertReferences[mCombinedVertices[i].PtId1].push_back(i);
mVertReferences[mCombinedVertices[i].PtId2].push_back(i);
mVertReferences[mCombinedVertices[i].PtId3].push_back(i);
}
vector<Vector3> FacesNormals(mCombinedVertices.size());
for(unsigned int i = 0; i < mCombinedVertices.size(); ++i)
{
Vector3 VecL = mVertices[mCombinedVertices[i].PtId1] -
mVertices[mCombinedVertices[i].PtId2];
Vector3 VecR = mVertices[mCombinedVertices[i].PtId3] -
mVertices[mCombinedVertices[i].PtId2];
FacesNormals[i] = VecR.CrossProduct(VecL).NormalisedCopy();
}
mNormals.resize(mVertices.size());
mCombinedNormals.resize(mCombinedVertices.size());
for(unsigned int i = 1; i < mVertices.size(); ++i)
{
Vector3 NormalSum(0,0,0);
for(unsigned int j = 0; j < mVertReferences[i].size(); ++j)
{
NormalSum += FacesNormals[mVertReferences[i][j]];
mCombinedNormals[mVertReferences[i][j]].PtId1 =
mCombinedVertices[mVertReferences[i][j]].PtId1;
mCombinedNormals[mVertReferences[i][j]].PtId2 =
mCombinedVertices[mVertReferences[i][j]].PtId2;
mCombinedNormals[mVertReferences[i][j]].PtId3 =
mCombinedVertices[mVertReferences[i][j]].PtId3;
}
NormalSum /= float(mVertReferences[i].size());
mNormals[i] = NormalSum.NormalisedCopy();
}
}
//--------------------------------
//
//--------------------------------
void Quaternion::SetRotationArc( const Vector3& v0, const Vector3& v1 )
{
Vector3 vCross = v0.CrossProduct( v1 );
float fDot = v0.DotProduct( v1 );
float s = (float)sqrt( ( 1.0F + fDot ) * 2.0F );
if( 0.1f > s )
{
x = 0;
y = 1;
z = 0;
w = 0;
return;
}
x = vCross.x / s;
y = vCross.y / s;
z = vCross.z / s;
w = s * 0.5F;
} //Quaternion::SetRotationArc
void Quaternion::SetRotationArc(const Vector3& v0, const Vector3& v1, const Vector3 &norm)
{
Vector3 vCross = v0.CrossProduct(v1);
const float len = vCross.Length();
if (len <= 0.01f)
{
// v0 - v1 벡터가 정확히 반대 방향이거나, 정확히 같은 방향을 가르킬때,
// 두 벡터에 직교하는 벡터 norm 에서 180도 회전하거나, 회전하지 않거나
// 결정한다.
*this = Quaternion(norm, v0.DotProduct(v1) > 0 ? 0 : MATH_PI);
return;
}
float fDot = v0.DotProduct(v1);
float s = (float)sqrtf((1.0f + fDot) * 2.0f);
x = vCross.x / s;
y = vCross.y / s;
z = vCross.z / s;
w = s * 0.5f;
} //Quaternion::SetRotationArc
//--------------------------------
//
//--------------------------------
void Quaternion::SetRotationArc( const Vector3& v0, const Vector3& v1 )
{
Vector3 vCross = v0.CrossProduct(v1);
const float len = vCross.Length();
if (len <= 0.01f)
{
x = 0; y = 0; z = 0; w = 1;
return;
}
float fDot = v0.DotProduct( v1 );
float s = (float)sqrtf((1.0f + fDot) * 2.0f);
//if (0.1f > s)
//{
// x = 0; y = 1; z = 0; w = 0;
// return;
//}
x = vCross.x / s;
y = vCross.y / s;
z = vCross.z / s;
w = s * 0.5f;
} //Quaternion::SetRotationArc
int main()
{
cout << "---------------------------Matrix 3--------------------------------" << endl;
Matrix3 TranslationXY;
TranslationXY = Mat3.m_TranslationXY(2, 2);
cout << TranslationXY;
cout << endl;
cout << "--------------------------MATRIX 4 --------------------------------" << endl;
Matrix4 RotationX;
RotationX = Mat4.m_RotationX(3);
cout << RotationX;
cout << endl;
Matrix4 RotationY;
RotationY = Mat4.m_RotationY(2);
cout << RotationY;
cout << endl;
Matrix4 RotationZ;
RotationZ = Mat4.m_RotationZ(2);
cout << RotationZ;
cout << endl;
Matrix4 TranslationXYZ;
TranslationXYZ = Mat4.m_TranslationXYZ(2, 2, 2);
cout << TranslationXYZ;
cout << endl;
Matrix4 mat;
mat = Mat4.m_OrthoProjection(2,2,2,2,2,2);
cout << mat;
cout << endl;
Matrix4 Identity;
mat = Mat4.m_CreateIdentity();
cout << Identity;
cout <<endl;
cout << "---------------------------COMMON MATH--------------------------------" << endl;
cout << ComMath.Pow2(2, 2)<< endl;
cout << ComMath.m_RadianConvert(360)<< endl;
cout << ComMath.m_degreeConvert(6) << endl;
Vect3.x = 2;
Vect3.y = 2;
Vect3.z =2;
Vect33.x = 4;
Vect33.y = 4;
Vect33.z = 4;
cout << ComMath.m_Lerp(Vect3, Vect33, 2) << endl;
cout << "---------------------------VECTOR 3--------------------------------" << endl;
Vect3.x = 2;
Vect3.y =2;
Vect3.z =2;
cout << Vect3.Magnitude()<<endl;
Vect3.x = 2;
Vect3.y =2;
Vect3.z =2;
cout << Vect33.Normalise(Vect3)<<endl;
Vect3.x = 2;
Vect3.y =2;
Vect3.z = 2;
cout << Vect33.GetNormal(Vect3) << endl;
Vect3.x = 2;
Vect3.y = 2;
Vect3.z =2;
cout <<Vect33.DotProduct(Vect3) << endl;
Vect3.x = 4;
Vect3.y = 4;
Vect3.z = 4;
Vect33.x =4;
Vect33.y = 4;
Vect3.z = 4;
cout << Vect3.EulerAngle(Vect3, Vect33)<<endl;
Vect3.x = 2;
Vect3.y = 2;
Vect3.z = 2;
Vect33.x = 2;
Vect33.y =2;
Vect33.z = 2;
cout << Vect3.CrossProduct(Vect3, Vect33)<<endl;
Matrix3 Transform;
Transform = Mat3;
Vect3.x =2;
Vect3.y = 2;
Vect3.z = 2;
cout << Vect3.m_TransformVector3(Mat3)<<endl;
Matrix3 tempM;
tempM = Mat3;
Vect3.x = 2;
Vect3.y = 2;
Vect3.z = 2;
cout << Vect3.Scale(Mat3);
cout << endl;
cout << "---------------------------VECTOR 4--------------------------------" << endl;
Vect4.x = 2;
Vect4.y =2;
Vect4.z =2;
Vect4.w = 2;
cout << Vect4.m_Magnitude()<<endl;
Vect4.x = 2;
Vect4.y =2;
Vect4.z =2;
Vect4.w = 2;
cout << Vect4.m_GetNormal(Vect4)<<endl;
Vect4.x = 2;
Vect4.y =2;
Vect4.z =2;
Vect4.w = 2;
cout << Vect4.m_Normalise(Vect4) <<endl;
Vect4.x = 2;
Vect4.y =2;
Vect4.z =2;
Vect4.w = 2;
cout << Vect4.m_DotProduct(Vect4) << endl;
cout << Vect4.m_RGBconverter(0xFFFFFFFF)<<endl;
Matrix4 Transform2;
Transform2 = Mat4;
Vect4.x = 2;
Vect4.y =2;
Vect4.z =2;
Vect4.w = 2;
cout << Vect4.m_TransformPoint(Mat4) << endl;
Matrix4 Transform3;
Transform3 = Mat4;
Vect4.x = 2;
Vect4.y =2;
Vect4.z =2;
Vect4.w = 2;
cout << Vect4.m_TransformVector4(Vect4, Mat4);
cout << endl;
Matrix4 mat4;
mat4 = Mat4;
Vect4.x = 2;
Vect4.y = 2;
Vect4.z = 2;
Vect4.w = 2;
cout << Vect4.Scale(Mat4);
cout << endl;
cout << "---------------------------VECTOR 2--------------------------------" << endl;
Vectors Point;
Point.x = 2;
Point.y =2;
cout << V2.pointSubtract(Point, 2) << endl;
Vectors Point2;
Point2.x = 2;
Point2.y =2;
cout << V2.pointAdd(Point2, 2)<<endl;
Vectors Point3;
Point3.x = 2;
Point3.y =2;
cout << V2.multiplyScalar(Point3, 2) << endl;
Vectors Point4;
Point4.x = 2;
Point4.y =2;
cout << V2.getMagnitude(Point4)<<endl;
Vectors Point5;
Point5.x = 2;
Point5.y =2;
cout<<V2.getNormal(Point5)<<endl;
getchar();
return 0;
}
/**
* @brief
* Returns the currently picked texture coordinate (can also be outside the 0..1 interval)
*/
bool PickingResult::GetTextureCoordinate(Vector2 &vTexCoord, uint32 nTexCoordChannel) const
{
// Is anything picked?
if (m_pSceneNode) {
// Get the mesh handler
MeshHandler *pMeshHandler = m_pSceneNode->GetMeshHandler();
if (pMeshHandler) {
// Get the mesh
Mesh *pMesh = pMeshHandler->GetResource();
if (pMesh) {
// Get the first LOD level of the mesh
MeshLODLevel *pLODLevel = pMesh->GetLODLevel(0);
if (pLODLevel) {
// Get the vertex indices of the picked triangle
uint32 nVertex0, nVertex1, nVertex2;
if (pLODLevel->GetTriangle(m_nGeometry, m_nTriangle, nVertex0, nVertex1, nVertex2)) {
// Get and lock the vertex buffer
VertexBuffer *pVertexBuffer = pMeshHandler->GetVertexBuffer();
if (pVertexBuffer && pVertexBuffer->GetNumOfElements() && pVertexBuffer->Lock(Lock::ReadOnly)) {
// Get triangle vertex position
const Vector3 vA = static_cast<const float*>(pVertexBuffer->GetData(nVertex0, VertexBuffer::Position));
const Vector3 vB = static_cast<const float*>(pVertexBuffer->GetData(nVertex1, VertexBuffer::Position));
const Vector3 vC = static_cast<const float*>(pVertexBuffer->GetData(nVertex2, VertexBuffer::Position));
// Get triangle texture coordinates
const float *pfTexCoordA = static_cast<const float*>(pVertexBuffer->GetData(nVertex0, VertexBuffer::TexCoord, nTexCoordChannel));
const float *pfTexCoordB = static_cast<const float*>(pVertexBuffer->GetData(nVertex1, VertexBuffer::TexCoord, nTexCoordChannel));
const float *pfTexCoordC = static_cast<const float*>(pVertexBuffer->GetData(nVertex2, VertexBuffer::TexCoord, nTexCoordChannel));
// Unlock the vertex buffer
pVertexBuffer->Unlock();
// Calculate picked texture coordinate
if (pfTexCoordA && pfTexCoordB && pfTexCoordC) {
const Vector2 vTexCoordA = pfTexCoordA;
const Vector2 vTexCoordB = pfTexCoordB;
const Vector2 vTexCoordC = pfTexCoordC;
// We want to have the texture coordinate for 'm_vPoint'...
// ... we have all triangle data we need to calculate our ...
// ... 3 vertex positions, 3 texture coordinates and the point on the triangle we want to calculate
// the texture coordinate for. We solve the problem by using "Barycentric coordinates".
// http://www.gamedev.net/community/forums/topic.asp?topic_id=451357
// Compute the normal of the triangle
Vector3 vN;
vN.CrossProduct(vB-vA, vC-vA);
vN.Normalize();
// Compute twice area of triangle ABC
const float fAreaABC = vN.DotProduct(Vector3().CrossProduct(vB-vA, vC-vA));
// Compute a
const float fAreaPBC = vN.DotProduct(Vector3().CrossProduct(vB-m_vPoint, vC-m_vPoint));
const float fA = fAreaPBC / fAreaABC;
// Compute b
const float fAreaPCA = vN.DotProduct(Vector3().CrossProduct(vC-m_vPoint, vA-m_vPoint));
const float fB = fAreaPCA / fAreaABC;
// Compute c
const float fC = 1.0f - fA - fB;
// Finally, calculate the texture coordinate
vTexCoord = vTexCoordA*fA + vTexCoordB*fB + vTexCoordC*fC;
// Done
return true;
}
}
}
}
}
}
}
// Set to null on error
vTexCoord = Vector2::Zero;
// Error!
return false;
}