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Merge pull request #942 from Goodlyay/master

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Minor fix for advanced lighting
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UnknownShadow200 2022-05-15 14:10:57 +10:00 committed by GitHub
commit 22b232940e
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1 changed files with 18 additions and 9 deletions
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27
src/Builder.c
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@ -771,14 +771,22 @@ enum ADV_MASK {
xP1_yM1_zP1, xP1_yCC_zP1, xP1_yP1_zP1,
};
/* Bit-or the Adv_Lit flags with these to set the appropriate light values */
#define LIT_M1 (1 << 0)
#define LIT_CC (1 << 1)
#define LIT_P1 (1 << 2)
/* Returns a 3 bit value where */
/* - bit 0 set: Y-1 is in light */
/* - bit 1 set: Y is in light */
/* - bit 2 set: Y+1 is in light */
static int Adv_Lit(int x, int y, int z, int cIndex) {
int flags, offset, lightFlags;
BlockID block;
if (y < 0 || y >= World.Height) return 7; /* all faces lit */
if (y < 0 || y >= World.Height) return LIT_M1 | LIT_CC | LIT_P1; /* all faces lit */
/* TODO: check sides height (if sides > edges), check if edge block casts a shadow */
if (!World_ContainsXZ(x, z)) {
return y >= Builder_EdgeLevel ? 7 : y == (Builder_EdgeLevel - 1) ? 6 : 0;
return y >= Builder_EdgeLevel ? LIT_M1 | LIT_CC | LIT_P1 : y == (Builder_EdgeLevel - 1) ? LIT_CC | LIT_P1 : 0;
}
flags = 0;
@ -787,19 +795,20 @@ static int Adv_Lit(int x, int y, int z, int cIndex) {
/* Use fact Light(Y.YMin) == Light((Y-1).YMax) */
offset = (lightFlags >> FACE_YMIN) & 1;
flags |= Lighting_IsLit_Fast(x, y - offset, z) ? 1 : 0;
flags |= Lighting_IsLit_Fast(x, y - offset, z) ? LIT_M1 : 0;
/* Light is same for all the horizontal faces */
flags |= Lighting_IsLit_Fast(x, y, z) ? 2 : 0;
flags |= Lighting_IsLit_Fast(x, y, z) ? LIT_CC : 0;
/* Use fact Light((Y+1).YMin) == Light(Y.YMax) */
offset = (lightFlags >> FACE_YMAX) & 1;
flags |= Lighting_IsLit_Fast(x, (y + 1) - offset, z) ? 4 : 0;
flags |= Lighting_IsLit_Fast(x, (y + 1) - offset, z) ? LIT_P1 : 0;
/* If a block is fullbright, it should also look as if that spot is lit */
if (Blocks.FullBright[Builder_Chunk[cIndex - 324]]) flags |= LIT_M1;
if (Blocks.FullBright[block]) flags |= LIT_CC;
if (Blocks.FullBright[Builder_Chunk[cIndex + 324]]) flags |= LIT_P1;
/* Dynamic lighting */
if (Blocks.FullBright[block]) flags |= 5;
if (Blocks.FullBright[Builder_Chunk[cIndex + 324]]) flags |= 4;
if (Blocks.FullBright[Builder_Chunk[cIndex - 324]]) flags |= 1;
return flags;
}