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Use 64-bit fixed point for node builder's vertex map

Browse source 
https://forum.zdoom.org/viewtopic.php?t=59368
This commit is contained in:
alexey.lysiuk 2018-02-28 14:27:22 +02:00 committed by Christoph Oelckers
parent e70250425a
commit 56df88c792
3 changed files with 12 additions and 10 deletions
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4
src/nodebuild.cpp
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@ -814,8 +814,8 @@ void FNodeBuilder::SplitSegs (uint32_t set, node_t &node, uint32_t splitseg, uin
frac = InterceptVector (node, *seg);
newvert.x = Vertices[seg->v1].x;
newvert.y = Vertices[seg->v1].y;
newvert.x += fixed_t(frac * double(Vertices[seg->v2].x - newvert.x));
newvert.y += fixed_t(frac * double(Vertices[seg->v2].y - newvert.y));
newvert.x += fixed_t(frac * (double(Vertices[seg->v2].x) - newvert.x));
newvert.y += fixed_t(frac * (double(Vertices[seg->v2].y) - newvert.y));
vertnum = VertexMap->SelectVertexClose (newvert);
if (vertnum != (unsigned int)seg->v1 && vertnum != (unsigned int)seg->v2)

6
src/nodebuild.h
View file

@ -91,6 +91,8 @@ struct FSimpleVert
fixed_t x, y;
};
typedef int64_t fixed64_t;
class FNodeBuilder
{
struct FPrivSeg
@ -167,14 +169,14 @@ class FNodeBuilder
FNodeBuilder &MyBuilder;
TArray<int> *VertexGrid;
fixed_t MinX, MinY, MaxX, MaxY;
fixed64_t MinX, MinY, MaxX, MaxY;
int BlocksWide, BlocksTall;
enum { BLOCK_SHIFT = 8 + FRACBITS };
enum { BLOCK_SIZE = 1 << BLOCK_SHIFT };
int InsertVertex (FPrivVert &vert);
inline int GetBlock (fixed_t x, fixed_t y)
inline int GetBlock (fixed64_t x, fixed64_t y)
{
assert (x >= MinX);
assert (y >= MinY);

12
src/nodebuild_utility.cpp
View file

@ -641,8 +641,8 @@ FNodeBuilder::FVertexMap::FVertexMap (FNodeBuilder &builder,
MinY = miny;
BlocksWide = int(((double(maxx) - minx + 1) + (BLOCK_SIZE - 1)) / BLOCK_SIZE);
BlocksTall = int(((double(maxy) - miny + 1) + (BLOCK_SIZE - 1)) / BLOCK_SIZE);
MaxX = MinX + BlocksWide * BLOCK_SIZE - 1;
MaxY = MinY + BlocksTall * BLOCK_SIZE - 1;
MaxX = MinX + fixed64_t(BlocksWide) * BLOCK_SIZE - 1;
MaxY = MinY + fixed64_t(BlocksTall) * BLOCK_SIZE - 1;
VertexGrid = new TArray<int>[BlocksWide * BlocksTall];
}
@ -703,10 +703,10 @@ int FNodeBuilder::FVertexMap::InsertVertex (FNodeBuilder::FPrivVert &vert)
// If a vertex is near a block boundary, then it will be inserted on
// both sides of the boundary so that SelectVertexClose can find
// it by checking in only one block.
fixed_t minx = MAX (MinX, vert.x - VERTEX_EPSILON);
fixed_t maxx = MIN (MaxX, vert.x + VERTEX_EPSILON);
fixed_t miny = MAX (MinY, vert.y - VERTEX_EPSILON);
fixed_t maxy = MIN (MaxY, vert.y + VERTEX_EPSILON);
fixed64_t minx = MAX (MinX, fixed64_t(vert.x) - VERTEX_EPSILON);
fixed64_t maxx = MIN (MaxX, fixed64_t(vert.x) + VERTEX_EPSILON);
fixed64_t miny = MAX (MinY, fixed64_t(vert.y) - VERTEX_EPSILON);
fixed64_t maxy = MIN (MaxY, fixed64_t(vert.y) + VERTEX_EPSILON);
int blk[4] =
{