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long side check for each triangle line

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My mistake in a previous commit
This commit is contained in:
Bigfoot71 2026-03-18 18:03:48 +01:00
parent a31fecf0b9
commit 0c6de5a08e
1 changed files with 8 additions and 8 deletions
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16
src/external/rlsw.h vendored
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@ -5477,13 +5477,13 @@ static void SW_RASTER_TRIANGLE(const sw_vertex_t *v0, const sw_vertex_t *v1, con
int yBot = (int)y2; int yBot = (int)y2;
// Scanline for the upper part of the triangle // Scanline for the upper part of the triangle
bool longSideIsLeft0 = (lVert.coord[0] < rVert.coord[0]);
const sw_vertex_t *l0 = longSideIsLeft0 ? &lVert : &rVert;
const sw_vertex_t *r0 = longSideIsLeft0 ? &rVert : &lVert;
for (int y = yTop; y < yMid; y++) for (int y = yTop; y < yMid; y++)
{ {
lVert.coord[1] = rVert.coord[1] = y; lVert.coord[1] = rVert.coord[1] = y;
SW_RASTER_TRIANGLE_SPAN(l0, r0, dVXdy02.texcoord[0], dVXdy02.texcoord[1]); bool longSideIsLeft = (lVert.coord[0] < rVert.coord[0]);
const sw_vertex_t *a = longSideIsLeft? &lVert : &rVert;
const sw_vertex_t *b = longSideIsLeft? &rVert : &lVert;
SW_RASTER_TRIANGLE_SPAN(a, b, dVXdy02.texcoord[0], dVXdy02.texcoord[1]);
SW_ADD_GRAD(&lVert, &dVXdy02); SW_ADD_GRAD(&lVert, &dVXdy02);
SW_ADD_GRAD(&rVert, &dVXdy01); SW_ADD_GRAD(&rVert, &dVXdy01);
} }
@ -5493,13 +5493,13 @@ static void SW_RASTER_TRIANGLE(const sw_vertex_t *v0, const sw_vertex_t *v1, con
SW_ADD_GRAD_SCALED(&rVert, &dVXdy12, y1Substep); SW_ADD_GRAD_SCALED(&rVert, &dVXdy12, y1Substep);
// Scanline for the lower part of the triangle // Scanline for the lower part of the triangle
bool longSideIsLeft1 = (lVert.coord[0] < rVert.coord[0]);
const sw_vertex_t *l1 = longSideIsLeft1 ? &lVert : &rVert;
const sw_vertex_t *r1 = longSideIsLeft1 ? &rVert : &lVert;
for (int y = yMid; y < yBot; y++) for (int y = yMid; y < yBot; y++)
{ {
lVert.coord[1] = rVert.coord[1] = y; lVert.coord[1] = rVert.coord[1] = y;
SW_RASTER_TRIANGLE_SPAN(l1, r1, dVXdy02.texcoord[0], dVXdy02.texcoord[1]); bool longSideIsLeft = (lVert.coord[0] < rVert.coord[0]);
const sw_vertex_t *a = longSideIsLeft? &lVert : &rVert;
const sw_vertex_t *b = longSideIsLeft? &rVert : &lVert;
SW_RASTER_TRIANGLE_SPAN(a, b, dVXdy02.texcoord[0], dVXdy02.texcoord[1]);
SW_ADD_GRAD(&lVert, &dVXdy02); SW_ADD_GRAD(&lVert, &dVXdy02);
SW_ADD_GRAD(&rVert, &dVXdy12); SW_ADD_GRAD(&rVert, &dVXdy12);
} }