static void drawSubspace(ConvexSubspace const &subspace)
{
float const scale = de::max(bmapDebugSize, 1.f);
float const width = (DENG_GAMEVIEW_WIDTH / 16) / scale;
Face const &poly = subspace.poly();
HEdge *base = poly.hedge();
HEdge *hedge = base;
do
{
Vector2d start = hedge->origin();
Vector2d end = hedge->twin().origin();
glBegin(GL_LINES);
glVertex2f(start.x, start.y);
glVertex2f(end.x, end.y);
glEnd();
ddouble length = (end - start).length();
if(length > 0)
{
Vector2d const unit = (end - start) / length;
Vector2d const normal(-unit.y, unit.x);
GL_BindTextureUnmanaged(GL_PrepareLSTexture(LST_DYNAMIC));
glEnable(GL_TEXTURE_2D);
GL_BlendMode(BM_ADD);
glBegin(GL_QUADS);
glTexCoord2f(0.75f, 0.5f);
glVertex2f(start.x, start.y);
glTexCoord2f(0.75f, 0.5f);
glVertex2f(end.x, end.y);
glTexCoord2f(0.75f, 1);
glVertex2f(end.x - normal.x * width, end.y - normal.y * width);
glTexCoord2f(0.75f, 1);
glVertex2f(start.x - normal.x * width, start.y - normal.y * width);
glEnd();
glDisable(GL_TEXTURE_2D);
GL_BlendMode(BM_NORMAL);
}
// Draw a bounding box for the leaf's face geometry.
start = Vector2d(poly.aaBox().minX, poly.aaBox().minY);
end = Vector2d(poly.aaBox().maxX, poly.aaBox().maxY);
glBegin(GL_LINES);
glVertex2f(start.x, start.y);
glVertex2f( end.x, start.y);
glVertex2f( end.x, start.y);
glVertex2f( end.x, end.y);
glVertex2f( end.x, end.y);
glVertex2f(start.x, end.y);
glVertex2f(start.x, end.y);
glVertex2f(start.x, start.y);
glEnd();
} while((hedge = &hedge->next()) != base);
}
/**
* On which side of the half-edge does the specified @a point lie?
*
* @param hedge Half-edge to test.
* @param point Point to test in the map coordinate space.
*
* @return @c <0 Point is to the left/back of the segment.
* @c =0 Point lies directly on the segment.
* @c >0 Point is to the right/front of the segment.
*/
static coord_t pointOnHEdgeSide(HEdge const &hedge, Vector2d const &point)
{
Vector2d const direction = hedge.twin().origin() - hedge.origin();
ddouble pointV1[2] = { point.x, point.y };
ddouble fromOriginV1[2] = { hedge.origin().x, hedge.origin().y };
ddouble directionV1[2] = { direction.x, direction.y };
return V2d_PointOnLineSide(pointV1, fromOriginV1, directionV1);
}
void buildSubspaceGeometries()
{
for(ConvexSubspaceProxy const &subspace : subspaces)
{
/// @todo Move BSP leaf construction here?
BspLeaf &bspLeaf = *subspace.bspLeaf();
subspace.buildGeometry(bspLeaf, *mesh);
// Account the new segments.
/// @todo Refactor away.
for(OrderedSegment const &oseg : subspace.segments())
{
if(oseg.segment->hasHEdge())
{
// There is now one more line segment.
segmentCount += 1;
}
}
}
/*
* Finalize the built geometry by adding a twin half-edge for any
* which don't yet have one.
*/
for(ConvexSubspaceProxy const &convexSet : subspaces)
for(OrderedSegment const &oseg : convexSet.segments())
{
LineSegmentSide *seg = oseg.segment;
if(seg->hasHEdge() && !seg->back().hasHEdge())
{
HEdge *hedge = &seg->hedge();
DENG2_ASSERT(!hedge->hasTwin());
// Allocate the twin from the same mesh.
hedge->setTwin(hedge->mesh().newHEdge(seg->back().from()));
hedge->twin().setTwin(hedge);
}
}
}
