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Improve horizon

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This commit is contained in:
Miloslav Číž 2018-09-12 15:39:28 +02:00
parent 2c77b6d728
commit 99a29e9d57
1 changed files with 7 additions and 6 deletions
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13
raycastlib.h
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@ -815,7 +815,7 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
int_maybe32_t z1ScreenCeilNoClamp = 0; int_maybe32_t z1ScreenCeilNoClamp = 0;
int_maybe32_t z2ScreenCeil = 0; int_maybe32_t z2ScreenCeil = 0;
int_maybe32_t wallScreenHeightCeilNoClamp = 0; int_maybe32_t wallScreenHeightCeilNoClamp = 0;
int_maybe32_t zBottomCeil; int_maybe32_t zBottomCeil = y2;
int8_t skipCeilingWall = 1; int8_t skipCeilingWall = 1;
if (_ceilFunction != 0) if (_ceilFunction != 0)
@ -959,13 +959,17 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
Unit horizon = (y2 < _middleRow || _ceilFunction == 0) ? _middleRow : y2; Unit horizon = (y2 < _middleRow || _ceilFunction == 0) ? _middleRow : y2;
horizon = clamp(horizon,0,_camera.resolution.y); horizon = clamp(horizon,0,_camera.resolution.y);
for (int_maybe32_t i = y; i >= horizon + (horizon > y2 ? 0 : 1); --i) horizon += horizon > y2 ? 0 : 1; // bug workaround
for (int_maybe32_t i = y; i >= horizon; --i)
{ {
p.position.y = i; p.position.y = i;
p.depth = (_fogStartYBottom - i) * _floorDepthStep + floorCameraDiff; p.depth = (_fogStartYBottom - i) * _floorDepthStep + floorCameraDiff;
_pixelFunction(&p); _pixelFunction(&p);
} }
y = horizon < y ? horizon : y;
// draw ceiling until horizon // draw ceiling until horizon
p.isFloor = 0; p.isFloor = 0;
@ -974,10 +978,7 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
_ceilFunction != 0 ? _ceilFunction != 0 ?
absVal(worldZPrevCeil) * VERTICAL_DEPTH_MULTIPLY : UNITS_PER_SQUARE; absVal(worldZPrevCeil) * VERTICAL_DEPTH_MULTIPLY : UNITS_PER_SQUARE;
horizon = y > _middleRow ? _middleRow : y; for (int_maybe32_t i = y2; i < y; ++i)
horizon = clamp(horizon,0,_camResYLimit);
for (int_maybe32_t i = y2; i < horizon; ++i)
{ {
p.position.y = i; p.position.y = i;
p.depth = (i - _fogStartYTop) * _floorDepthStep + ceilCameraDiff; p.depth = (i - _fogStartYTop) * _floorDepthStep + ceilCameraDiff;