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Fix simple rendering func

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This commit is contained in:
Miloslav Číž 2018-09-14 17:46:31 +02:00
parent 9c0a2f2e5f
commit 4eb84296cb
1 changed files with 20 additions and 7 deletions
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27
raycastlib.h
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@ -795,6 +795,11 @@ Unit _floorCeilFunction(int16_t x, int16_t y)
#endif
}
Unit _floorHeightNotZeroFunction(int16_t x, int16_t y)
{
return _floorFunction(x,y) == 0 ? 0 : UNITS_PER_SQUARE;
}
Unit adjustDistance(Unit distance, Camera *camera, Ray *ray)
{
/* FIXME/TODO: The adjusted (=orthogonal, camera-space) distance could
@ -955,7 +960,7 @@ void _columnFunctionSimple(HitResult *hits, uint16_t hitCount, uint16_t x,
Ray ray)
{
int16_t y = 0;
int16_t wallScreenHeight = 0;
int16_t wallHeightScreen = 0;
int16_t coordHelper = 0;
int16_t wallStart = _middleRow;
int16_t wallEnd = _middleRow;
@ -970,20 +975,27 @@ void _columnFunctionSimple(HitResult *hits, uint16_t hitCount, uint16_t x,
{
HitResult hit = hits[0];
p.hit = hit;
dist = adjustDistance(hit.distance,&_camera,&ray);
int16_t wallHeightWorld = _floorFunction(hit.square.x,hit.square.y);
wallScreenHeight = perspectiveScale((wallHeightWorld *
wallHeightScreen = perspectiveScale((wallHeightWorld *
_camera.resolution.y) / UNITS_PER_SQUARE,dist);
int16_t normalizedWallHeight =
(UNITS_PER_SQUARE * wallHeightScreen) / wallHeightWorld;
heightOffset = perspectiveScale(_cameraHeightScreen,dist);
wallStart = _middleRow - wallScreenHeight / 2 + heightOffset;
wallStart = _middleRow - wallHeightScreen + heightOffset +
normalizedWallHeight;
coordHelper = -1 * wallStart;
coordHelper = coordHelper >= 0 ? coordHelper : 0;
wallEnd = clamp(wallStart + wallHeightScreen,0,_camResYLimit);
wallStart = clamp(wallStart,0,_camResYLimit);
wallEnd = clamp(wallStart + wallScreenHeight,0,_camResYLimit);
}
// draw ceiling
@ -1012,9 +1024,10 @@ void _columnFunctionSimple(HitResult *hits, uint16_t hitCount, uint16_t x,
p.position.y = y;
if (_computeTextureCoords)
p.textureCoordY = (coordHelper * UNITS_PER_SQUARE) / wallScreenHeight;
p.textureCoordY = (coordHelper * UNITS_PER_SQUARE) / wallHeightScreen;
_pixelFunction(&p);
++y;
++coordHelper;
}
@ -1089,8 +1102,8 @@ void renderSimple(Camera cam, ArrayFunction floorHeightFunc,
constraints.maxHits = 1;
castRaysMultiHit(cam,_floorFunction,typeFunc,_columnFunctionSimple,
constraints);
castRaysMultiHit(cam,_floorHeightNotZeroFunction,typeFunc,
_columnFunctionSimple, constraints);
}
Vector2D normalize(Vector2D v)