static void PlaceDetail( DetailModel_t const& model, const Vector& pt, const Vector& normal )
{
// But only place it on the surface if it meets the angle constraints...
float cosAngle = normal.z;
// Never emit if the angle's too steep
if (cosAngle < model.m_MaxCosAngle)
return;
// If it's between min + max, flip a coin...
if (cosAngle < model.m_MinCosAngle)
{
float probability = (cosAngle - model.m_MaxCosAngle) /
(model.m_MinCosAngle - model.m_MaxCosAngle);
float t = rand() / (float)RAND_MAX;
if (t > probability)
return;
}
// Compute the orientation of the detail
QAngle angles;
if (model.m_Flags & MODELFLAG_UPRIGHT)
{
// If it's upright, we just select a random yaw
angles.Init( 0, 360.0f * rand() / (float)RAND_MAX, 0.0f );
}
else
{
// It's not upright, so it must conform to the ground. Choose
// a random orientation based on the surface normal
Vector zaxis;
VectorCopy( normal, zaxis );
// Choose any two arbitrary axes which are perpendicular to the normal
Vector xaxis( 1, 0, 0 );
if (fabs(xaxis.Dot(zaxis)) - 1.0 > -1e-3)
xaxis.Init( 0, 1, 0 );
Vector yaxis;
CrossProduct( zaxis, xaxis, yaxis );
CrossProduct( yaxis, zaxis, xaxis );
VMatrix matrix;
matrix.SetBasisVectors( xaxis, yaxis, zaxis );
float rotAngle = 360.0f * rand() / (float)RAND_MAX;
VMatrix rot = SetupMatrixAxisRot( Vector( 0, 0, 1 ), rotAngle );
matrix = matrix * rot;
MatrixToAngles( matrix, angles );
}
// FIXME: We may also want a purely random rotation too
// Insert an element into the object dictionary if it aint there...
switch ( model.m_Type )
{
case DETAIL_PROP_TYPE_MODEL:
AddDetailToLump( model.m_ModelName.String(), pt, angles, model.m_Orientation );
break;
case DETAIL_PROP_TYPE_SPRITE:
{
float flScale = 1.0f;
if ( model.m_flRandomScaleStdDev != 0.0f )
{
flScale = fabs( RandomGaussianFloat( 1.0f, model.m_flRandomScaleStdDev ) );
}
AddDetailSpriteToLump( pt, angles, model.m_Orientation, model.m_Pos, model.m_Tex, flScale );
}
break;
}
}
//-----------------------------------------------------------------------------
// Copies the texture coordinate system from pFrom into pTo. Then it rotates
// the texture around the edge until it's as close to pTo's normal as possible.
//-----------------------------------------------------------------------------
void CFaceEditMaterialPage::CopyTCoordSystem( const CMapFace *pFrom, CMapFace *pTo )
{
Vector axis[2], vEdge, vEdgePt, vOrigin;
Vector vFromPt, vNextFromPt;
Vector vToPt, vPrevToPt;
Vector vTestTextureNormal, vTextureNormal;
VMatrix mEdgeRotation, mOriginRotation, mTranslation;
float fAngle, fDot;
bool bRotate;
float fShift[2];
Vector vProjTexNormal;
Vector vProjPolyNormal;
// The edge vector lies on both planes.
vEdge = pFrom->plane.normal.Cross(pTo->plane.normal);
VectorNormalize( vEdge );
// To find a point on the plane, we make a plane from the edge vector and find the intersection
// between the three planes (without the third plane, there are an infinite number of solutions).
if( PlaneIntersection( VPlane(pFrom->plane.normal, pFrom->plane.dist),
VPlane(pTo->plane.normal, pTo->plane.dist),
VPlane(vEdge, 0.0f), vEdgePt ) )
{
bRotate = true;
}
else
{
// Ok, in this case, the planes are parallel so we don't need to rotate around the edge anyway!
bRotate = false;
}
// Copy the texture coordinate system.
axis[0] = pFrom->texture.UAxis.AsVector3D();
axis[1] = pFrom->texture.VAxis.AsVector3D();
fShift[0] = pFrom->texture.UAxis[3];
fShift[1] = pFrom->texture.VAxis[3];
vOrigin = axis[0]*fShift[0]*pFrom->texture.scale[0] + axis[1]*fShift[1]*pFrom->texture.scale[1];
vTextureNormal = axis[0].Cross(axis[1]);
VectorNormalize(vTextureNormal);
if(bRotate)
{
// Project texture normal and poly normal into the plane of rotation
// to get the angle between them.
vProjTexNormal = vTextureNormal - vEdge * vEdge.Dot(vTextureNormal);
vProjPolyNormal = pTo->plane.normal - vEdge * vEdge.Dot(pTo->plane.normal);
VectorNormalize( vProjTexNormal );
VectorNormalize( vProjPolyNormal );
fDot = vProjTexNormal.Dot(vProjPolyNormal);
fAngle = (float)(acos(fDot) * (180.0f / M_PI));
if(fDot < 0.0f)
fAngle = 180.0f - fAngle;
// Ok, rotate them for the final values.
mEdgeRotation = SetupMatrixAxisRot(vEdge, fAngle);
axis[0] = mEdgeRotation.ApplyRotation(axis[0]);
axis[1] = mEdgeRotation.ApplyRotation(axis[1]);
// Origin needs translation and rotation to rotate around the edge.
mTranslation = SetupMatrixTranslation(vEdgePt);
mOriginRotation = ~mTranslation * mEdgeRotation * mTranslation;
vOrigin = mOriginRotation * vOrigin;
}
pTo->texture.UAxis.AsVector3D() = axis[0];
pTo->texture.VAxis.AsVector3D() = axis[1];
pTo->texture.UAxis[3] = axis[0].Dot(vOrigin) / pFrom->texture.scale[0];
pTo->texture.VAxis[3] = axis[1].Dot(vOrigin) / pFrom->texture.scale[1];
pTo->NormalizeTextureShifts();
pTo->texture.scale[0] = pFrom->texture.scale[0];
pTo->texture.scale[1] = pFrom->texture.scale[1];
// rotate is only for UI purposes, it doesn't actually do anything.
pTo->texture.rotate = 0.0f;
pTo->CalcTextureCoords();
}
VMatrix rotationMatrix;
VMatrix invRotationMatrix;
Vector transformedEye;
float angle = 0.0f;
if(sv_surface_rotate.GetBool())
{
angle = view->GetViewSetup()->angles.y+180.0f;
//ConMsg("Angle = %f\n", angle);
pRenderContext->Rotate(angle, 0.0f, 0.0f, 1.0f);
//VMatrix rotationMatrix2 = SetupMatrixAngles(view->GetViewSetup()->angles);
//pRenderContext->MultMatrix(rotationMatrix2);
//VMatrix rotationMatrix = rotationMatrix2.InverseTR(); //SetupMatrixAngles(-(view->GetViewSetup()->angles));
rotationMatrix = SetupMatrixAxisRot(Vector(0.0f, 0.0f, 1.0f), -angle);
invRotationMatrix = SetupMatrixAxisRot(Vector(0.0f, 0.0f, 1.0f), angle);
Vector eye = view->GetViewSetup()->origin;
transformedEye = (eye-center)*(1.0f/m_flRadius);
transformedEye = rotationMatrix.ApplyRotation(transformedEye);
}
else
{
rotationMatrix.Identity();
invRotationMatrix.Identity();
transformedEye.Init();
angle = 0.0f;
}
if(sv_surface_use_tiler.GetBool())
{
static int vmatrix_SetupMatrixAxisRot (lua_State *L) {
lua_pushvmatrix(L, SetupMatrixAxisRot(luaL_checkvector(L, 1), luaL_checknumber(L, 2)));
return 1;
}
