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Add render function

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This commit is contained in:
Miloslav Číž 2018-08-31 18:26:51 +02:00
parent 1e5d223be2
commit 30f8e6f205
1 changed files with 42 additions and 0 deletions
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42
raycastlib.h
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@ -141,6 +141,9 @@ Unit perspectiveScale(Unit originalSize, Unit distance, Unit fov);
void castRaysMultiHit(Camera cam, ArrayFunction arrayFunc,
ColumnFunction columnFunc, RayConstraints constraints);
void render(Camera cam, ArrayFunction arrayFunc, PixelFunction pixelFunc,
RayConstraints constraints);
//=============================================================================
// privates
@ -481,6 +484,45 @@ void castRaysMultiHit(Camera cam, ArrayFunction arrayFunc,
}
}
PixelFunction _pixelFunction = 0;
Camera _camera;
void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
{
if (hitCount == 0)
return;
HitResult hit = hits[0];
Unit dist = // adjusted distance
(hit.distance * vectorsAngleCos(angleToDirection(_camera.direction),
ray.direction)) / UNITS_PER_SQUARE;
dist = dist == 0 ? 1 : dist; // prevent division by zero
int32_t height = (UNITS_PER_SQUARE * 50) / dist;
uint32_t start = _camera.resolution.y / 2 - height / 2;
for (uint32_t i = start; i < start + height; ++i)
{
PixelInfo p;
p.position.x = x;
p.position.y = i;
p.isWall = 1;
_pixelFunction(p);
}
}
void render(Camera cam, ArrayFunction arrayFunc, PixelFunction pixelFunc,
RayConstraints constraints)
{
_pixelFunction = pixelFunc;
_camera = cam;
castRaysMultiHit(cam,arrayFunc,_columnFunction,constraints);
}
Vector2D normalize(Vector2D v)
{
profileCall(normalize);