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Move shear to camera

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This commit is contained in:
Miloslav Číž 2018-09-08 07:10:09 +02:00
parent 78ec58d1df
commit 5c9c7cb299
1 changed files with 7 additions and 9 deletions
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16
raycastlib.h
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@ -101,6 +101,8 @@ typedef struct
Vector2D position;
Unit direction;
Vector2D resolution;
int16_t shear; /* Shear offset in pixels (0 => no shear), can simulate
looking up/down. */
Unit fovAngle;
Unit height;
@ -203,13 +205,10 @@ void castRaysMultiHit(Camera cam, ArrayFunction arrayFunc,
index), can be 0 (no type in hit result)
@param pixelFunc callback function to draw a single pixel on screen
@param constraints constraints for each cast ray
@param verticalShear normalized camera shear from (1 = UNITS_PER_SQUARE =
camera y resolution, 0 means no shear), can simulate
looking up/down
*/
void render(Camera cam, ArrayFunction floorHeightFunc,
ArrayFunction ceilingHeightFunc, ArrayFunction typeFunction,
PixelFunction pixelFunc, RayConstraints constraints, Unit verticalShear);
PixelFunction pixelFunc, RayConstraints constraints);
void moveCameraWithCollision(Camera *camera, Vector2D planeOffset,
Unit heightOffset, ArrayFunction floorHeightFunc,
@ -854,7 +853,7 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
void render(Camera cam, ArrayFunction floorHeightFunc,
ArrayFunction ceilingHeightFunc, ArrayFunction typeFunction,
PixelFunction pixelFunc, RayConstraints constraints, Unit verticalShear)
PixelFunction pixelFunc, RayConstraints constraints)
{
_pixelFunction = pixelFunc;
_floorFunction = floorHeightFunc;
@ -863,9 +862,7 @@ void render(Camera cam, ArrayFunction floorHeightFunc,
_camResYLimit = cam.resolution.y - 1;
_middleRow = cam.resolution.y / 2;
if (verticalShear != 0)
_middleRow = _middleRow + (verticalShear * _middleRow) /
UNITS_PER_SQUARE;
_middleRow = _middleRow + cam.shear;
_computeTextureCoords = constraints.computeTextureCoords;
@ -933,7 +930,8 @@ PixelInfo mapToScreen(Vector2D worldPosition, Unit height, Camera camera)
result.position.y = camera.resolution.y / 2 -
(camera.resolution.y *
perspectiveScale(height - camera.height,result.depth)) / UNITS_PER_SQUARE;
perspectiveScale(height - camera.height,result.depth)) / UNITS_PER_SQUARE
+ camera.shear;
Unit middleColumn = camera.resolution.x / 2;