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Face.cpp
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Face.cpp
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#include "Face.h"
#include "ivolumetest.h"
#include "ifilter.h"
#include "itextstream.h"
#include "irenderable.h"
#include "math/Matrix3.h"
#include "shaderlib.h"
#include "texturelib.h"
#include "Winding.h"
#include "selection/algorithm/Texturing.h"
#include "Brush.h"
#include "BrushNode.h"
#include "BrushModule.h"
// The structure that is saved in the undostack
class Face::SavedState final :
public IUndoMemento
{
public:
FacePlane::SavedState _planeState;
TextureProjection _texdefState;
std::string _materialName;
SavedState(const Face& face) :
_planeState(face.getPlane()),
_texdefState(face.getProjection()),
_materialName(face.getShader())
{}
};
Face::Face(Brush& owner) :
_owner(owner),
_shader(texdef_name_default(), _owner.getBrushNode().getRenderSystem()),
_undoStateSaver(nullptr),
_faceIsVisible(true)
{
setupSurfaceShader();
m_plane.initialiseFromPoints(
Vector3(0, 0, 0), Vector3(64, 0, 0), Vector3(0, 64, 0)
);
planeChanged();
shaderChanged();
}
Face::Face(
Brush& owner,
const Vector3& p0,
const Vector3& p1,
const Vector3& p2,
const std::string& shader,
const TextureProjection& projection
) :
_owner(owner),
_shader(shader, _owner.getBrushNode().getRenderSystem()),
_texdef(projection),
_undoStateSaver(nullptr),
_faceIsVisible(true)
{
setupSurfaceShader();
m_plane.initialiseFromPoints(p0, p1, p2);
planeChanged();
shaderChanged();
}
Face::Face(Brush& owner, const Plane3& plane) :
_owner(owner),
_shader("", _owner.getBrushNode().getRenderSystem()),
_undoStateSaver(nullptr),
_faceIsVisible(true)
{
setupSurfaceShader();
m_plane.setPlane(plane);
planeChanged();
shaderChanged();
}
Face::Face(Brush& owner, const Plane3& plane, const Matrix3& textureProjection, const std::string& material) :
_owner(owner),
_shader(material, _owner.getBrushNode().getRenderSystem()),
_undoStateSaver(nullptr),
_faceIsVisible(true)
{
setupSurfaceShader();
m_plane.setPlane(plane);
_texdef.setTransform(textureProjection);
planeChanged();
shaderChanged();
}
Face::Face(Brush& owner, const Face& other) :
IFace(other),
IUndoable(other),
_owner(owner),
m_plane(other.m_plane),
_shader(other._shader.getMaterialName(), _owner.getBrushNode().getRenderSystem()),
_texdef(other.getProjection()),
_undoStateSaver(nullptr),
_faceIsVisible(other._faceIsVisible)
{
setupSurfaceShader();
planepts_assign(m_move_planepts, other.m_move_planepts);
planeChanged();
}
Face::~Face()
{
_surfaceShaderRealised.disconnect();
}
void Face::setupSurfaceShader()
{
_surfaceShaderRealised = _shader.signal_Realised().connect(
sigc::mem_fun(*this, &Face::realiseShader));
// If we're already in realised state, call realiseShader right away
if (_shader.isRealised())
{
realiseShader();
}
}
IBrush& Face::getBrush()
{
return _owner;
}
Brush& Face::getBrushInternal()
{
return _owner;
}
void Face::planeChanged()
{
revertTransform();
_owner.onFacePlaneChanged();
}
void Face::realiseShader()
{
_owner.onFaceShaderChanged();
}
void Face::connectUndoSystem(IMapFileChangeTracker& changeTracker)
{
assert(!_undoStateSaver);
_shader.setInUse(true);
_undoStateSaver = GlobalUndoSystem().getStateSaver(*this, changeTracker);
}
void Face::disconnectUndoSystem(IMapFileChangeTracker& changeTracker)
{
assert(_undoStateSaver);
_undoStateSaver = nullptr;
GlobalUndoSystem().releaseStateSaver(*this);
_shader.setInUse(false);
}
void Face::undoSave()
{
if (_undoStateSaver)
{
_undoStateSaver->save(*this);
}
}
// undoable
IUndoMementoPtr Face::exportState() const
{
return std::make_shared<SavedState>(*this);
}
void Face::importState(const IUndoMementoPtr& data)
{
undoSave();
auto state = std::static_pointer_cast<SavedState>(data);
state->_planeState.exportState(getPlane());
setShader(state->_materialName);
_texdef = state->_texdefState;
planeChanged();
_owner.onFaceConnectivityChanged();
texdefChanged();
_owner.onFaceShaderChanged();
}
void Face::flipWinding() {
m_plane.reverse();
planeChanged();
}
bool Face::intersectVolume(const VolumeTest& volume) const
{
if (!m_winding.empty())
{
const Plane3& plane = m_planeTransformed.getPlane();
return volume.TestPlane(Plane3(plane.normal(), -plane.dist()));
}
else
{
// Empty winding, return false
return false;
}
}
bool Face::intersectVolume(const VolumeTest& volume, const Matrix4& localToWorld) const
{
if (m_winding.size() > 0)
{
return volume.TestPlane(Plane3(plane3().normal(), -plane3().dist()), localToWorld);
}
else
{
// Empty winding, return false
return false;
}
}
void Face::renderWireframe(RenderableCollector& collector, const Matrix4& localToWorld,
const IRenderEntity& entity) const
{
collector.addRenderable(*entity.getWireShader(), m_winding, localToWorld,
nullptr, &entity);
}
void Face::setRenderSystem(const RenderSystemPtr& renderSystem)
{
_shader.setRenderSystem(renderSystem);
// Update the visibility flag, we might have switched shaders
const ShaderPtr& shader = _shader.getGLShader();
if (shader)
{
_faceIsVisible = shader->getMaterial()->isVisible();
}
else
{
_faceIsVisible = false; // no shader => not visible
}
}
void Face::transformTexDefLocked(const Matrix4& transform)
{
Vector3 vertices[3] =
{
m_winding[0].vertex,
m_winding[1].vertex,
m_winding[2].vertex
};
Vector2 texcoords[3] =
{
m_winding[0].texcoord,
m_winding[1].texcoord,
m_winding[2].texcoord
};
// Transform the vertices
vertices[0] = transform.transformPoint(vertices[0]);
vertices[1] = transform.transformPoint(vertices[1]);
vertices[2] = transform.transformPoint(vertices[2]);
// Keep the texture coords, recalculate the texture projection
m_texdefTransformed.calculateFromPoints(vertices, texcoords, m_planeTransformed.getPlane().normal());
}
void Face::translate(const Vector3& translation)
{
m_planeTransformed.translate(translation);
if (GlobalBrush().textureLockEnabled() && m_winding.size() >= 3)
{
transformTexDefLocked(Matrix4::getTranslation(translation));
}
_owner.onFacePlaneChanged();
updateWinding();
}
void Face::transform(const Matrix4& transform)
{
// Transform the FacePlane using the given matrix (before the tex def is recalculated)
m_planeTransformed.transform(transform);
if (GlobalBrush().textureLockEnabled() && m_winding.size() >= 3)
{
transformTexDefLocked(transform);
}
_owner.onFacePlaneChanged();
updateWinding();
}
void Face::assign_planepts(const PlanePoints planepts)
{
m_planeTransformed.initialiseFromPoints(
planepts[0], planepts[1], planepts[2]
);
_owner.onFacePlaneChanged();
updateWinding();
}
/// \brief Reverts the transformable state of the brush to identity.
void Face::revertTransform()
{
m_planeTransformed = m_plane;
planepts_assign(m_move_planeptsTransformed, m_move_planepts);
m_texdefTransformed = _texdef;
updateWinding();
emitTextureCoordinates();
}
void Face::freezeTransform()
{
undoSave();
m_plane = m_planeTransformed;
planepts_assign(m_move_planepts, m_move_planeptsTransformed);
_texdef = m_texdefTransformed;
updateWinding();
}
void Face::updateWinding() {
m_winding.updateNormals(m_plane.getPlane().normal());
}
void Face::update_move_planepts_vertex(std::size_t index, PlanePoints planePoints) {
std::size_t numpoints = getWinding().size();
ASSERT_MESSAGE(index < numpoints, "update_move_planepts_vertex: invalid index");
std::size_t opposite = getWinding().opposite(index);
std::size_t adjacent = getWinding().wrap(opposite + numpoints - 1);
planePoints[0] = getWinding()[opposite].vertex;
planePoints[1] = getWinding()[index].vertex;
planePoints[2] = getWinding()[adjacent].vertex;
// winding points are very inaccurate, so they must be quantised before using them to generate the face-plane
planepts_quantise(planePoints, GRID_MIN);
}
void Face::snapto(float snap) {
if (contributes()) {
PlanePoints planePoints;
update_move_planepts_vertex(0, planePoints);
planePoints[0].snap(snap);
planePoints[1].snap(snap);
planePoints[2].snap(snap);
assign_planepts(planePoints);
freezeTransform();
SceneChangeNotify();
if (!m_plane.getPlane().isValid()) {
rError() << "WARNING: invalid plane after snap to grid\n";
}
}
}
void Face::testSelect(SelectionTest& test, SelectionIntersection& best) {
m_winding.testSelect(test, best);
}
void Face::testSelect_centroid(SelectionTest& test, SelectionIntersection& best) {
test.TestPoint(m_centroid, best);
}
void Face::shaderChanged()
{
emitTextureCoordinates();
_owner.onFaceShaderChanged();
// Update the visibility flag, but leave out the contributes() check
const ShaderPtr& shader = getFaceShader().getGLShader();
if (shader)
{
_faceIsVisible = shader->getMaterial()->isVisible();
}
else
{
_faceIsVisible = false; // no shader => not visible
}
planeChanged();
SceneChangeNotify();
}
const std::string& Face::getShader() const
{
return _shader.getMaterialName();
}
void Face::setShader(const std::string& name)
{
undoSave();
auto ssr = getShiftScaleRotation();
_shader.setMaterialName(name);
// Adjust the scale to match the previous material
auto newSsr = getShiftScaleRotation();
newSsr.scale[0] = ssr.scale[0];
newSsr.scale[1] = ssr.scale[1];
setShiftScaleRotation(newSsr);
shaderChanged();
}
void Face::revertTexdef()
{
m_texdefTransformed = _texdef;
}
void Face::texdefChanged()
{
revertTexdef();
emitTextureCoordinates();
// Fire the signal to update the Texture Tools
signal_texdefChanged().emit();
}
const TextureProjection& Face::getProjection() const
{
return _texdef;
}
TextureProjection& Face::getProjection()
{
return _texdef;
}
Matrix3 Face::getProjectionMatrix() const
{
return getProjection().getMatrix();
}
void Face::setProjectionMatrix(const Matrix3& projection)
{
getProjection().setTransform(projection);
texdefChanged();
}
void Face::GetTexdef(TextureProjection& projection) const
{
projection = _texdef;
}
void Face::SetTexdef(const TextureProjection& projection)
{
undoSave();
_texdef = projection;
texdefChanged();
}
ShiftScaleRotation Face::getShiftScaleRotation() const
{
return _texdef.getShiftScaleRotation(_shader.getWidth(), _shader.getHeight());
}
void Face::setShiftScaleRotation(const ShiftScaleRotation& ssr)
{
undoSave();
// Construct the matrix from the adjusted shift/scale/rotate values
_texdef.setFromShiftScaleRotate(ssr, _shader.getWidth(), _shader.getHeight());
texdefChanged();
}
Vector2 Face::getTexelScale() const
{
auto imageWidth = _shader.getWidth();
auto imageHeight = _shader.getHeight();
auto textureMatrix = _texdef.getMatrix();
// Multiplying the image dimensions onto the texture matrix yields
// the base vectors in texel space. Take the length to get the covered texels per world unit
return Vector2(
Vector2(textureMatrix.xx() * imageWidth, textureMatrix.xy() * imageHeight).getLength(),
Vector2(textureMatrix.yx() * imageWidth, textureMatrix.yy() * imageHeight).getLength()
);
}
float Face::getTextureAspectRatio() const
{
auto imageWidth = _shader.getWidth();
auto imageHeight = _shader.getHeight();
return static_cast<float>(imageWidth) / imageHeight;
}
// Returns the index pair forming an edge, keeping the winding direction intact
inline std::pair<std::size_t, std::size_t> getEdgeIndexPair(std::size_t first, std::size_t second, std::size_t windingSize)
{
if (first > second || second == windingSize - 1 && first == 0)
{
std::swap(first, second);
}
return std::make_pair(first, second);
}
void Face::applyShaderFromFace(const Face& other)
{
undoSave();
// Apply the material of the other face
setShader(other.getShader());
// Retrieve the textureprojection from the source face
TextureProjection projection;
other.GetTexdef(projection);
// The list of shared vertices (other face index => this face index)
std::vector<std::pair<std::size_t, std::size_t>> sharedVertices;
// Let's see whether this face is sharing any 3D coordinates with the other one
// It's important to iterate over ascending indices of the other face, since we need to keep the winding order
for (std::size_t i = 0; i < other.m_winding.size(); ++i)
{
for (std::size_t j = 0; j < m_winding.size(); ++j)
{
// Check if the vertices are matching
if (math::isNear(m_winding[j].vertex, other.m_winding[i].vertex, 0.001))
{
// Match found, add to list
sharedVertices.emplace_back(std::make_pair(i, j));
break;
}
}
}
// Do we have a shared edge?
if (sharedVertices.size() == 2)
{
auto edgeIndices = getEdgeIndexPair(sharedVertices[0].first, sharedVertices[1].first, other.m_winding.size());
// We wrap the texture around the shared edge, check the UV scale perpendicular to that edge
auto edgeCenter = (other.m_winding[edgeIndices.first].vertex + other.m_winding[edgeIndices.second].vertex) * 0.5;
// Construct an edge vector, following the winding direction
auto edge = other.m_winding[edgeIndices.second].vertex - other.m_winding[edgeIndices.first].vertex;
// Construct a vector that is orthogonal to the edge, pointing outwards
auto outwardsDirection = edge.cross(other.m_planeTransformed.getPlane().normal());
// Pick a point outside face, placing that orthogonal vector on the edge center
auto extrapolatedPoint = edgeCenter + outwardsDirection;
auto extrapolationLength = outwardsDirection.getLength();
auto extrapolatedTexcoords = other.m_texdefTransformed.getTextureCoordsForVertex(
extrapolatedPoint, other.m_planeTransformed.getPlane().normal(), Matrix4::getIdentity()
);
// Construct an edge vector on this target face, keeping the winding order
edgeIndices = getEdgeIndexPair(sharedVertices[0].second, sharedVertices[1].second, m_winding.size());
auto targetFaceEdge = m_winding[edgeIndices.second].vertex - m_winding[edgeIndices.first].vertex;
auto inwardsDirection = -targetFaceEdge.cross(m_planeTransformed.getPlane().normal()).getNormalised();
// Calculate a point on this face plane, with the same distance from the edge center as on the source face
auto pointOnThisFacePlane = edgeCenter + inwardsDirection * extrapolationLength;
// Now we have 3 vertices and 3 texcoords to calculate the matching texdef
Vector3 vertices[3] =
{
m_winding[sharedVertices[0].second].vertex,
m_winding[sharedVertices[1].second].vertex,
pointOnThisFacePlane
};
// Use the shared texcoords we found on the other face, and the third one we calculated
Vector2 texcoords[3] =
{
other.m_winding[sharedVertices[0].first].texcoord,
other.m_winding[sharedVertices[1].first].texcoord,
extrapolatedTexcoords
};
setTexDefFromPoints(vertices, texcoords);
_texdef = m_texdefTransformed; // freeze that matrix
return;
}
else
{
// Just use the other projection, as-is
SetTexdef(projection);
}
}
void Face::setTexDefFromPoints(const Vector3 points[3], const Vector2 uvs[3])
{
m_texdefTransformed.calculateFromPoints(points, uvs, getPlane3().normal());
emitTextureCoordinates();
// Fire the signal to update the Texture Tools
signal_texdefChanged().emit();
}
void Face::shiftTexdef(float s, float t)
{
undoSave();
_texdef.shift(s, t);
texdefChanged();
}
void Face::shiftTexdefByPixels(float sPixels, float tPixels)
{
// Scale down the s,t translation using the active texture dimensions
shiftTexdef(sPixels / _shader.getWidth(), tPixels / _shader.getHeight());
}
void Face::scaleTexdef(float sFactor, float tFactor)
{
selection::algorithm::TextureScaler::ScaleFace(*this, { sFactor, tFactor });
}
void Face::rotateTexdef(float angle)
{
selection::algorithm::TextureRotator::RotateFace(*this, degrees_to_radians(angle));
}
void Face::fitTexture(float s_repeat, float t_repeat) {
undoSave();
_texdef.fitTexture(_shader.getWidth(), _shader.getHeight(), m_plane.getPlane().normal(), m_winding, s_repeat, t_repeat);
texdefChanged();
}
void Face::flipTexture(unsigned int flipAxis)
{
selection::algorithm::TextureFlipper::FlipFace(*this, flipAxis);
}
void Face::alignTexture(AlignEdge align)
{
undoSave();
_texdef.alignTexture(align, m_winding);
texdefChanged();
}
void Face::emitTextureCoordinates()
{
m_texdefTransformed.emitTextureCoordinates(m_winding, m_planeTransformed.getPlane().normal(), Matrix4::getIdentity());
}
void Face::applyDefaultTextureScale()
{
_texdef = TextureProjection::ConstructDefault(_shader.getWidth(), _shader.getHeight());
texdefChanged();
}
const Vector3& Face::centroid() const {
return m_centroid;
}
void Face::construct_centroid() {
// Take the plane and let the winding calculate the centroid
m_centroid = m_winding.centroid(plane3());
}
const Winding& Face::getWinding() const {
return m_winding;
}
Winding& Face::getWinding() {
return m_winding;
}
const Plane3& Face::plane3() const
{
_owner.onFaceEvaluateTransform();
return m_planeTransformed.getPlane();
}
const Plane3& Face::getPlane3() const
{
return m_plane.getPlane();
}
FacePlane& Face::getPlane() {
return m_plane;
}
const FacePlane& Face::getPlane() const {
return m_plane;
}
SurfaceShader& Face::getFaceShader() {
return _shader;
}
const SurfaceShader& Face::getFaceShader() const {
return _shader;
}
bool Face::contributes() const {
return m_winding.size() > 2;
}
bool Face::is_bounded() const {
for (Winding::const_iterator i = m_winding.begin(); i != m_winding.end(); ++i) {
if (i->adjacent == brush::c_brush_maxFaces) {
return false;
}
}
return true;
}
void Face::normaliseTexture()
{
selection::algorithm::TextureNormaliser::NormaliseFace(*this);
}
bool Face::isVisible() const
{
return _faceIsVisible;
}
void Face::updateFaceVisibility()
{
_faceIsVisible = contributes() && getFaceShader().getGLShader()->getMaterial()->isVisible();
}
sigc::signal<void>& Face::signal_texdefChanged()
{
static sigc::signal<void> _sigTexdefChanged;
return _sigTexdefChanged;
}