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Fix wall heights

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This commit is contained in:
Miloslav Číž 2018-09-01 09:07:49 +02:00
parent 3404194dfb
commit 31691f8023
1 changed files with 7 additions and 4 deletions
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11
raycastlib.h
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@ -96,7 +96,7 @@ typedef struct
a "type" of given square as an integer (e.g. square height) - between squares
that return different numbers there is considered to be a collision.
*/
typedef int16_t (*ArrayFunction)(int16_t x, int16_t y);
typedef Unit (*ArrayFunction)(int16_t x, int16_t y);
typedef void (*PixelFunction)(PixelInfo info);
@ -512,11 +512,14 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
dist = dist == 0 ? 1 : dist; // prevent division by zero
int32_t height = perspectiveScale(50,dist,1);
Unit z =
(_camera.resolution.y *
(_arrayFunction(hit.square.x,hit.square.y) - _camera.height)
) / UNITS_PER_SQUARE;
int16_t z = _arrayFunction(hit.square.x,hit.square.y) * 50;
int32_t height = perspectiveScale(z,dist,1);
Unit offset = perspectiveScale(_camera.height - z,dist,1);
Unit offset = perspectiveScale(_camera.height,dist,1);
int32_t start = _camera.resolution.y / 2 + height / 2 + offset;