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Fix bug

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This commit is contained in:
Miloslav Číž 2018-09-12 13:45:08 +02:00
parent 1436b17c30
commit 2c77b6d728
1 changed files with 42 additions and 31 deletions
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73
raycastlib.h
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@ -787,14 +787,17 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
int_maybe32_t z1Screen = _middleRow - perspectiveScale(
(worldZPrev * _camera.resolution.y) / UNITS_PER_SQUARE,dist);
int_maybe32_t z2Screen = _middleRow - perspectiveScale(
(worldZ2 * _camera.resolution.y) / UNITS_PER_SQUARE,dist);
int8_t skipFloorWall = ((z1Screen < 0 && z2Screen < 0) ||
(z1Screen > _camResYLimit && z2Screen > _camResYLimit));
int_maybe32_t z1ScreenNoClamp = z1Screen;
z1Screen = clamp(z1Screen,0,_camResYLimit);
z1Screen = z1Screen > y2 ? z1Screen : y2;
int_maybe32_t z2Screen = _middleRow - perspectiveScale(
(worldZ2 * _camera.resolution.y) / UNITS_PER_SQUARE,dist);
int_maybe32_t wallScreenHeightNoClamp = z1ScreenNoClamp - z2Screen + 1;
wallScreenHeightNoClamp = wallScreenHeightNoClamp == 0 ? 1 :
wallScreenHeightNoClamp;
@ -802,6 +805,8 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
z2Screen = clamp(z2Screen,0,_camResYLimit);
z2Screen = z2Screen > y2 ? z2Screen : y2;
int_maybe32_t zTop = z1Screen < z2Screen ? z1Screen : z2Screen;
// make the same variables for ceiling
Unit wallHeightCeil = 0;
@ -809,6 +814,9 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
int_maybe32_t z1ScreenCeil = 0;
int_maybe32_t z1ScreenCeilNoClamp = 0;
int_maybe32_t z2ScreenCeil = 0;
int_maybe32_t wallScreenHeightCeilNoClamp = 0;
int_maybe32_t zBottomCeil;
int8_t skipCeilingWall = 1;
if (_ceilFunction != 0)
{
@ -820,35 +828,33 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
z1ScreenCeil = _middleRow - perspectiveScale(
(worldZPrevCeil * _camera.resolution.y) / UNITS_PER_SQUARE,dist);
z2ScreenCeil = _middleRow - perspectiveScale(
(worldZ2Ceil * _camera.resolution.y) / UNITS_PER_SQUARE,dist);
skipCeilingWall = ((z1ScreenCeil < 0 && z2ScreenCeil < 0) ||
(z1ScreenCeil > _camResYLimit && z2ScreenCeil > _camResYLimit));
z1ScreenCeilNoClamp = z1ScreenCeil;
z1ScreenCeil = clamp(z1ScreenCeil,0,_camResYLimit);
z1ScreenCeil = z1ScreenCeil < y ? z1ScreenCeil : y;
z2ScreenCeil = _middleRow - perspectiveScale(
(worldZ2Ceil * _camera.resolution.y) / UNITS_PER_SQUARE,dist);
wallScreenHeightCeilNoClamp =
z2ScreenCeil - z1ScreenCeilNoClamp;
wallScreenHeightCeilNoClamp = wallScreenHeightCeilNoClamp != 0 ?
wallScreenHeightCeilNoClamp : 1;
z2ScreenCeil = clamp(z2ScreenCeil,0,_camResYLimit);
z2ScreenCeil = z2ScreenCeil < y ? z2ScreenCeil : y;
zBottomCeil = z1ScreenCeil > z2ScreenCeil ?
z1ScreenCeil : z2ScreenCeil;
}
int_maybe32_t wallScreenHeightCeilNoClamp =
z2ScreenCeil - z1ScreenCeilNoClamp;
wallScreenHeightCeilNoClamp = wallScreenHeightCeilNoClamp != 0 ?
wallScreenHeightCeilNoClamp : 1;
z2ScreenCeil = clamp(z2ScreenCeil,0,_camResYLimit);
z2ScreenCeil = z2ScreenCeil < y ? z2ScreenCeil : y;
int_maybe32_t zTop = z1Screen < z2Screen ? z1Screen : z2Screen;
int_maybe32_t zBottomCeil = z1ScreenCeil > z2ScreenCeil ?
z1ScreenCeil : z2ScreenCeil;
if (zTop <= zBottomCeil)
zBottomCeil = zTop; // walls on ceiling and floor met
if (z1Screen == 0) // TMP: nasty shear bug workaround
z1Screen = -1;
// draw floor until wall
p.isWall = 0;
@ -892,25 +898,30 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
p.depth = dist;
p.isFloor = 1;
int_maybe32_t iTo = y2 < zTop ? zTop : y2;
int_maybe32_t iTo;
for (int_maybe32_t i = z1Screen < y ? z1Screen : y; i >= iTo; --i)
if (!skipFloorWall)
{
p.position.y = i;
p.hit = hit;
iTo = y2 < zTop ? zTop : y2;
if (_computeTextureCoords)
p.textureCoordY = UNITS_PER_SQUARE - 1 - ((z1ScreenNoClamp - i) *
UNITS_PER_SQUARE) / wallScreenHeightNoClamp;
for (int_maybe32_t i = z1Screen < y ? z1Screen : y; i >= iTo; --i)
{
p.position.y = i;
p.hit = hit;
_pixelFunction(&p);
if (_computeTextureCoords)
p.textureCoordY = UNITS_PER_SQUARE - 1 - ((z1ScreenNoClamp - i) *
UNITS_PER_SQUARE) / wallScreenHeightNoClamp;
_pixelFunction(&p);
}
}
// draw ceiling wall
p.isFloor = 0;
if (_ceilFunction != 0)
if (!skipCeilingWall)
{
iTo = y > zBottomCeil ? zBottomCeil : y;