williamjcm/small3dlib
1
0
Fork 0
mirror of https://git.coom.tech/drummyfish/small3dlib.git synced 2024-11-23 20:59:58 +01:00
Code Activity

Use triangle winding function in draw

Browse source
This commit is contained in:
Miloslav Číž 2019-06-12 23:35:57 +02:00
parent fd7d957a64
commit a2283732f0
1 changed files with 3 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
small3dlib.h
View file

@ -1652,11 +1652,7 @@ void S3L_drawTriangle(
tPointSy = y##t;\
tPointPP = &point##t;\
barycentric2 = &(p.barycentric[t]);\
int32_t aDx = x##a - x##t;\
int32_t bDx = x##b - x##t;\
int32_t aDy = S3L_nonZero(y##a - y##t);\
int32_t bDy = S3L_nonZero(y##b - y##t);\
if ((aDx << 8) / aDy < (bDx << 8) / bDy)\
if (S3L_triangleWinding(x##t,y##t,x##a,y##a,x##b,y##b) >= 0)\
{\
lPointSx = x##a; lPointSy = y##a;\
rPointSx = x##b; rPointSy = y##b;\
@ -1948,6 +1944,8 @@ void S3L_drawTriangle(
if (rXClipped < lXClipped &&
lXClipped < S3L_RESOLUTION_X && rXClipped >= 0)
{
// TODO: After the change to computing the L/R, is this needed anymore?
/* This can sometimes happen because of numerical errors in sorting
left vs right triangle point, which are compared based on SLOPE, not
x coordinates. Here we swap the values to prevents not drawing the