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Add diminishing lighting

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This commit is contained in:
Magnus Norddahl 2016-11-08 18:08:13 +01:00
parent 74977486c3
commit 6ef8fe2da5
1 changed files with 16 additions and 10 deletions
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26
src/r_poly_triangle.cpp
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@ -638,10 +638,6 @@ void ScreenPolyTriangleDrawer::draw32(const ScreenPolyTriangleDrawerArgs *args,
int textureHeight = args->textureHeight;
uint32_t light = args->uniforms->light;
#if !defined(NO_SSE)
__m128i mlight = _mm_set1_epi16(light);
#endif
// 28.4 fixed-point coordinates
const int Y1 = (int)round(16.0f * v1.y);
const int Y2 = (int)round(16.0f * v2.y);
@ -768,6 +764,16 @@ void ScreenPolyTriangleDrawer::draw32(const ScreenPolyTriangleDrawerArgs *args,
varyingBR[i] = ((startVarying[i] + offx1 * gradVaryingX[i] + offy1 * gradVaryingY[i]) * rcpWBR - varyingTR[i]) * (1.0f / q);
}
float globVis = 1706.0f;
float vis = globVis / rcpWTL;
float shade = 64.0f - (light * 255 / 256 + 12.0f) * 32.0f / 128.0f;
float lightscale = clamp((shade - MIN(24.0f, vis)) / 32.0f, 0.0f, 31.0f / 32.0f);
int diminishedlight = (int)clamp((1.0f - lightscale) * 256.0f + 0.5f, 0.0f, 256.0f);
#if !defined(NO_SSE)
__m128i mlight = _mm_set1_epi16(diminishedlight);
#endif
uint32_t *buffer = dest;
// Accept whole block when totally covered
@ -796,9 +802,9 @@ void ScreenPolyTriangleDrawer::draw32(const ScreenPolyTriangleDrawerArgs *args,
uint32_t uvoffset = upos * textureHeight + vpos;
uint32_t fg = texturePixels[uvoffset];
uint32_t fg_red = (RPART(fg) * light) >> 8;
uint32_t fg_green = (GPART(fg) * light) >> 8;
uint32_t fg_blue = (BPART(fg) * light) >> 8;
uint32_t fg_red = (RPART(fg) * diminishedlight) >> 8;
uint32_t fg_green = (GPART(fg) * diminishedlight) >> 8;
uint32_t fg_blue = (BPART(fg) * diminishedlight) >> 8;
uint32_t fg_alpha = APART(fg);
if (fg_alpha > 127)
@ -875,9 +881,9 @@ void ScreenPolyTriangleDrawer::draw32(const ScreenPolyTriangleDrawerArgs *args,
uint32_t uvoffset = upos * textureHeight + vpos;
uint32_t fg = texturePixels[uvoffset];
uint32_t fg_red = (RPART(fg) * light) >> 8;
uint32_t fg_green = (GPART(fg) * light) >> 8;
uint32_t fg_blue = (BPART(fg) * light) >> 8;
uint32_t fg_red = (RPART(fg) * diminishedlight) >> 8;
uint32_t fg_green = (GPART(fg) * diminishedlight) >> 8;
uint32_t fg_blue = (BPART(fg) * diminishedlight) >> 8;
uint32_t fg_alpha = APART(fg);
if (fg_alpha > 127)