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Fix distance overflow

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Miloslav Číž 2019-10-21 17:37:35 +02:00
parent c813602947
commit 256221c6a2
1 changed files with 11 additions and 5 deletions
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16
raycastlib.h
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@ -26,7 +26,7 @@
author: Miloslav "drummyfish" Ciz author: Miloslav "drummyfish" Ciz
license: CC0 1.0 license: CC0 1.0
version: 0.90 version: 0.901
*/ */
#include <stdint.h> #include <stdint.h>
@ -855,8 +855,11 @@ void RCL_castRayMultiHit(RCL_Ray ray, RCL_ArrayFunction arrayFunc,
divided by leg B (length along the same axis). */ divided by leg B (length along the same axis). */
h.distance = h.distance =
((h.position.x - ray.start.x) * RCL_UNITS_PER_SQUARE * rayDirXRecip) (((h.position.x - ray.start.x) / 4) *
/ RECIP_SCALE; RCL_UNITS_PER_SQUARE * rayDirXRecip)
/ (RECIP_SCALE / 4);
// ^ / 4 is here to prevent overflow
#endif #endif
} }
else else
@ -877,8 +880,11 @@ void RCL_castRayMultiHit(RCL_Ray ray, RCL_ArrayFunction arrayFunc,
#if RCL_RECTILINEAR #if RCL_RECTILINEAR
h.distance = h.distance =
((h.position.y - ray.start.y) * RCL_UNITS_PER_SQUARE * rayDirYRecip) (((h.position.y - ray.start.y) / 4) *
/ RECIP_SCALE; RCL_UNITS_PER_SQUARE * rayDirYRecip)
/ (RECIP_SCALE / 4);
// ^ / 4 is here to prevent overflow
#endif #endif
} }