void Brush_ConstructCuboid(Brush& brush, const AABB& bounds, const std::string& shader, const TextureProjection& projection)
{
const unsigned char box[3][2] = { { 0, 1 }, { 2, 0 }, { 1, 2 } };
Vector3 mins(bounds.origin - bounds.extents);
Vector3 maxs(bounds.origin + bounds.extents);
brush.clear();
brush.reserve(6);
{
for(int i=0; i < 3; ++i)
{
Vector3 planepts1(maxs);
Vector3 planepts2(maxs);
planepts2[box[i][0]] = mins[box[i][0]];
planepts1[box[i][1]] = mins[box[i][1]];
brush.addPlane(maxs, planepts1, planepts2, shader, projection);
}
}
{
for(int i=0; i < 3; ++i)
{
Vector3 planepts1(mins);
Vector3 planepts2(mins);
planepts1[box[i][0]] = maxs[box[i][0]];
planepts2[box[i][1]] = maxs[box[i][1]];
brush.addPlane(mins, planepts1, planepts2, shader, projection);
}
}
}
void Cone::generate (Brush& brush, const AABB& bounds, std::size_t sides, const TextureProjection& projection,
const std::string& shader)
{
if (sides < _minSides) {
gtkutil::errorDialog(_("Too few sides for constructing the prism, minimum is 3"));
return;
}
if (sides > _maxSides) {
gtkutil::errorDialog(_("Too many sides for constructing the prism, maximum is 32"));
return;
}
brush.clear();
brush.reserve(sides + 1);
Vector3 mins(bounds.origin - bounds.extents);
Vector3 maxs(bounds.origin + bounds.extents);
float radius = maxExtent(bounds.extents);
const Vector3& mid = bounds.origin;
Vector3 planepts[3];
planepts[0][0] = mins[0];
planepts[0][1] = mins[1];
planepts[0][2] = mins[2];
planepts[1][0] = maxs[0];
planepts[1][1] = mins[1];
planepts[1][2] = mins[2];
planepts[2][0] = maxs[0];
planepts[2][1] = maxs[1];
planepts[2][2] = mins[2];
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
for (std::size_t i = 0; i < sides; ++i) {
double sv = sin(i * 3.14159265 * 2 / sides);
double cv = cos(i * 3.14159265 * 2 / sides);
planepts[0][0] = static_cast<float> (floor(mid[0] + radius * cv + 0.5));
planepts[0][1] = static_cast<float> (floor(mid[1] + radius * sv + 0.5));
planepts[0][2] = mins[2];
planepts[1][0] = mid[0];
planepts[1][1] = mid[1];
planepts[1][2] = maxs[2];
planepts[2][0] = static_cast<float> (floor(planepts[0][0] - radius * sv + 0.5));
planepts[2][1] = static_cast<float> (floor(planepts[0][1] + radius * cv + 0.5));
planepts[2][2] = maxs[2];
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
void Brush_ConstructSphere(Brush& brush, const AABB& bounds, std::size_t sides, const char* shader, const TextureProjection& projection)
{
if(sides < c_brushSphere_minSides)
{
globalErrorStream() << c_brushSphere_name << ": sides " << Unsigned(sides) << ": too few sides, minimum is " << Unsigned(c_brushSphere_minSides) << "\n";
return;
}
if(sides > c_brushSphere_maxSides)
{
globalErrorStream() << c_brushSphere_name << ": sides " << Unsigned(sides) << ": too many sides, maximum is " << Unsigned(c_brushSphere_maxSides) << "\n";
return;
}
brush.undoSave();
brush.clear();
brush.reserve(sides*sides);
float radius = max_extent(bounds.extents);
const Vector3& mid = bounds.origin;
Vector3 planepts[3];
double dt = 2 * c_pi / sides;
double dp = c_pi / sides;
for(std::size_t i=0; i < sides; i++)
{
for(std::size_t j=0;j < sides-1; j++)
{
double t = i * dt;
double p = float(j * dp - c_pi / 2);
planepts[0] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t, p), radius));
planepts[1] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t, p + dp), radius));
planepts[2] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t + dt, p + dp), radius));
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
{
double p = (sides - 1) * dp - c_pi / 2;
for(std::size_t i = 0; i < sides; i++)
{
double t = i * dt;
planepts[0] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t, p), radius));
planepts[1] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t + dt, p + dp), radius));
planepts[2] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t + dt, p), radius));
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
}
void Brush_ConstructCone(Brush& brush, const AABB& bounds, std::size_t sides, const char* shader, const TextureProjection& projection)
{
if(sides < c_brushCone_minSides)
{
globalErrorStream() << c_brushCone_name << ": sides " << Unsigned(sides) << ": too few sides, minimum is " << Unsigned(c_brushCone_minSides) << "\n";
return;
}
if(sides > c_brushCone_maxSides)
{
globalErrorStream() << c_brushCone_name << ": sides " << Unsigned(sides) << ": too many sides, maximum is " << Unsigned(c_brushCone_maxSides) << "\n";
return;
}
brush.undoSave();
brush.clear();
brush.reserve(sides+1);
Vector3 mins(vector3_subtracted(bounds.origin, bounds.extents));
Vector3 maxs(vector3_added(bounds.origin, bounds.extents));
float radius = max_extent(bounds.extents);
const Vector3& mid = bounds.origin;
Vector3 planepts[3];
planepts[0][0] = mins[0];planepts[0][1] = mins[1];planepts[0][2] = mins[2];
planepts[1][0] = maxs[0];planepts[1][1] = mins[1];planepts[1][2] = mins[2];
planepts[2][0] = maxs[0];planepts[2][1] = maxs[1];planepts[2][2] = mins[2];
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
for (std::size_t i=0 ; i<sides ; ++i)
{
double sv = sin (i*3.14159265*2/sides);
double cv = cos (i*3.14159265*2/sides);
planepts[0][0] = static_cast<float>(floor(mid[0]+radius*cv+0.5));
planepts[0][1] = static_cast<float>(floor(mid[1]+radius*sv+0.5));
planepts[0][2] = mins[2];
planepts[1][0] = mid[0];
planepts[1][1] = mid[1];
planepts[1][2] = maxs[2];
planepts[2][0] = static_cast<float>(floor(planepts[0][0] - radius * sv + 0.5));
planepts[2][1] = static_cast<float>(floor(planepts[0][1] + radius * cv + 0.5));
planepts[2][2] = maxs[2];
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
void Sphere::generate (Brush& brush, const AABB& bounds, std::size_t sides, const TextureProjection& projection,
const std::string& shader)
{
if (sides < _minSides) {
gtkutil::errorDialog(_("Too few sides for constructing the sphere, minimum is 3"));
return;
}
if (sides > _maxSides) {
gtkutil::errorDialog(_("Too many sides for constructing the sphere, maximum is 31"));
return;
}
brush.clear();
brush.reserve(sides * sides);
float radius = maxExtent(bounds.extents);
const Vector3& mid = bounds.origin;
Vector3 planepts[3];
double dt = 2 * c_pi / sides;
double dp = c_pi / sides;
for (std::size_t i = 0; i < sides; i++) {
for (std::size_t j = 0; j < sides - 1; j++) {
double t = i * dt;
double p = float(j * dp - c_pi / 2);
planepts[0] = mid + vector3_for_spherical(t, p) * radius;
planepts[1] = mid + vector3_for_spherical(t, p + dp) * radius;
planepts[2] = mid + vector3_for_spherical(t + dt, p + dp) * radius;
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
{
double p = (sides - 1) * dp - c_pi / 2;
for (std::size_t i = 0; i < sides; i++) {
double t = i * dt;
planepts[0] = mid + vector3_for_spherical(t, p) * radius;
planepts[1] = mid + vector3_for_spherical(t + dt, p + dp) * radius;
planepts[2] = mid + vector3_for_spherical(t + dt, p) * radius;
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
}
void Brush_ConstructPrism(Brush& brush, const AABB& bounds, std::size_t sides, int axis, const std::string& shader, const TextureProjection& projection)
{
if(sides < c_brushPrism_minSides)
{
globalErrorStream() << c_brushPrism_name << ": sides " << sides << ": too few sides, minimum is " << c_brushPrism_minSides << "\n";
return;
}
if(sides > c_brushPrism_maxSides)
{
globalErrorStream() << c_brushPrism_name << ": sides " << sides << ": too many sides, maximum is " << c_brushPrism_maxSides << "\n";
return;
}
brush.clear();
brush.reserve(sides+2);
Vector3 mins(bounds.origin - bounds.extents);
Vector3 maxs(bounds.origin + bounds.extents);
float radius = max_extent_2d(bounds.extents, axis);
const Vector3& mid = bounds.origin;
Vector3 planepts[3];
planepts[2][(axis+1)%3] = mins[(axis+1)%3];
planepts[2][(axis+2)%3] = mins[(axis+2)%3];
planepts[2][axis] = maxs[axis];
planepts[1][(axis+1)%3] = maxs[(axis+1)%3];
planepts[1][(axis+2)%3] = mins[(axis+2)%3];
planepts[1][axis] = maxs[axis];
planepts[0][(axis+1)%3] = maxs[(axis+1)%3];
planepts[0][(axis+2)%3] = maxs[(axis+2)%3];
planepts[0][axis] = maxs[axis];
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
planepts[0][(axis+1)%3] = mins[(axis+1)%3];
planepts[0][(axis+2)%3] = mins[(axis+2)%3];
planepts[0][axis] = mins[axis];
planepts[1][(axis+1)%3] = maxs[(axis+1)%3];
planepts[1][(axis+2)%3] = mins[(axis+2)%3];
planepts[1][axis] = mins[axis];
planepts[2][(axis+1)%3] = maxs[(axis+1)%3];
planepts[2][(axis+2)%3] = maxs[(axis+2)%3];
planepts[2][axis] = mins[axis];
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
for (std::size_t i=0 ; i<sides ; ++i)
{
double sv = sin (i*3.14159265*2/sides);
double cv = cos (i*3.14159265*2/sides);
planepts[0][(axis+1)%3] = static_cast<float>(floor(mid[(axis+1)%3]+radius*cv+0.5));
planepts[0][(axis+2)%3] = static_cast<float>(floor(mid[(axis+2)%3]+radius*sv+0.5));
planepts[0][axis] = mins[axis];
planepts[1][(axis+1)%3] = planepts[0][(axis+1)%3];
planepts[1][(axis+2)%3] = planepts[0][(axis+2)%3];
planepts[1][axis] = maxs[axis];
planepts[2][(axis+1)%3] = static_cast<float>(floor(planepts[0][(axis+1)%3] - radius*sv + 0.5));
planepts[2][(axis+2)%3] = static_cast<float>(floor(planepts[0][(axis+2)%3] + radius*cv + 0.5));
planepts[2][axis] = maxs[axis];
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
void BrushByPlaneClipper::visit(const scene::INodePtr& node) const {
// Don't clip invisible nodes
if (!node->visible()) {
return;
}
// Try to cast the instance onto a brush
Brush* brush = Node_getBrush(node);
// Return if not brush
if (brush == NULL) {
return;
}
Plane3 plane(_p0, _p1, _p2);
if (!plane.isValid()) {
return;
}
// greebo: Analyse the brush to find out which shader is the most used one
getMostUsedTexturing(brush);
BrushSplitType split = Brush_classifyPlane(*brush, _split == eFront ? -plane : plane);
if (split.counts[ePlaneBack] && split.counts[ePlaneFront]) {
// the plane intersects this brush
if (_split == eFrontAndBack) {
scene::INodePtr brushNode = GlobalBrushCreator().createBrush();
assert(brushNode != NULL);
Brush* fragment = Node_getBrush(brushNode);
assert(fragment != NULL);
fragment->copy(*brush);
FacePtr newFace = fragment->addPlane(_p0, _p1, _p2, _mostUsedShader, _mostUsedProjection);
if (newFace != NULL && _split != eFront) {
newFace->flipWinding();
}
fragment->removeEmptyFaces();
ASSERT_MESSAGE(!fragment->empty(), "brush left with no faces after split");
// Mark this brush for insertion
_insertList.insert(InsertMap::value_type(brushNode, node->getParent()));
}
FacePtr newFace = brush->addPlane(_p0, _p1, _p2, _mostUsedShader, _mostUsedProjection);
if (newFace != NULL && _split == eFront) {
newFace->flipWinding();
}
brush->removeEmptyFaces();
ASSERT_MESSAGE(!brush->empty(), "brush left with no faces after split");
}
// the plane does not intersect this brush
else if (_split != eFrontAndBack && split.counts[ePlaneBack] != 0) {
// the brush is "behind" the plane
_deleteList.insert(node);
}
}
void BrushByPlaneClipper::split(const BrushPtrVector& brushes)
{
Plane3 plane(_p0, _p1, _p2);
if (!plane.isValid())
{
return;
}
for (BrushPtrVector::const_iterator i = brushes.begin(); i != brushes.end(); ++i)
{
const BrushNodePtr& node = *i;
// Don't clip invisible nodes
if (!node->visible())
{
continue;
}
Brush& brush = node->getBrush();
scene::INodePtr parent = node->getParent();
if (!parent)
{
continue;
}
// greebo: Analyse the brush to find out which shader is the most used one
getMostUsedTexturing(brush);
BrushSplitType split = Brush_classifyPlane(brush, _split == eFront ? -plane : plane);
if (split.counts[ePlaneBack] && split.counts[ePlaneFront])
{
// the plane intersects this brush
if (_split == eFrontAndBack)
{
scene::INodePtr fragmentNode = GlobalBrushCreator().createBrush();
assert(fragmentNode != NULL);
// Put the fragment in the same layer as the brush it was clipped from
// Do this before adding the fragment to the parent, since there is an
// update algorithm setting the visibility of the fragment right there.
scene::assignNodeToLayers(fragmentNode, node->getLayers());
// greebo: For copying the texture scale the new node needs to be inserted in the scene
// otherwise the shaders cannot be captured and the scale is off
// Insert the child into the designated parent
scene::addNodeToContainer(fragmentNode, parent);
// Select the child
Node_setSelected(fragmentNode, true);
Brush* fragment = Node_getBrush(fragmentNode);
assert(fragment != NULL);
fragment->copy(brush);
FacePtr newFace = fragment->addPlane(_p0, _p1, _p2, _mostUsedShader, _mostUsedProjection);
if (newFace != NULL && _split != eFront)
{
newFace->flipWinding();
}
fragment->removeEmptyFaces();
ASSERT_MESSAGE(!fragment->empty(), "brush left with no faces after split");
}
FacePtr newFace = brush.addPlane(_p0, _p1, _p2, _mostUsedShader, _mostUsedProjection);
if (newFace != NULL && _split == eFront) {
newFace->flipWinding();
}
brush.removeEmptyFaces();
ASSERT_MESSAGE(!brush.empty(), "brush left with no faces after split");
}
// the plane does not intersect this brush
else if (_split != eFrontAndBack && split.counts[ePlaneBack] != 0)
{
// the brush is "behind" the plane
// Remove the node from the scene
scene::removeNodeFromParent(node);
}
}
}
