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fix pixel origin in line rasterization

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my bad, an oversight in my previous fix.
This offset should have been moved here rather than per pixel during truncation.
This commit is contained in:
Bigfoot71 2026-03-17 01:23:22 +01:00
parent fd6fdcce91
commit 7ac973b4b8
1 changed files with 5 additions and 4 deletions
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9
src/external/rlsw.h vendored
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@ -5749,10 +5749,11 @@ static void SW_RASTER_QUAD(const sw_vertex_t *a, const sw_vertex_t *b,
static void SW_RASTER_LINE(const sw_vertex_t *v0, const sw_vertex_t *v1)
{
float x0 = v0->screen[0];
float y0 = v0->screen[1];
float x1 = v1->screen[0];
float y1 = v1->screen[1];
// Convert from pixel-center convention (n+0.5) to pixel-origin convention (n)
float x0 = v0->screen[0] - 0.5f;
float y0 = v0->screen[1] - 0.5f;
float x1 = v1->screen[0] - 0.5f;
float y1 = v1->screen[1] - 0.5f;
float dx = x1 - x0;
float dy = y1 - y0;