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Improve point mapping

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This commit is contained in:
Miloslav Číž 2019-10-06 21:29:41 +02:00
parent 283db728fb
commit 0c66c8b407
1 changed files with 3 additions and 2 deletions
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raycastlib.h
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@ -1649,9 +1649,10 @@ RCL_PixelInfo RCL_mapToScreen(RCL_Vector2D worldPosition, RCL_Unit height,
cameraDir.x = cameraDir.y;
cameraDir.y = -1 * tmp;
// decide whether the point is in the left or right part of screen
/* decide whether the point is in the left or right part of screen, using
dot product (non-normalized, as we only need to compare to 0) */
if (RCL_vectorsAngleCos(toPoint,cameraDir) <= 0)
if ((toPoint.x * cameraDir.x + toPoint.y * cameraDir.y) <= 0)
a *= -1;
result.position.x =