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Start making movement

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This commit is contained in:
Miloslav Číž 2018-09-06 17:41:09 +02:00
parent 2aa9ba225b
commit f86215c4c1
1 changed files with 62 additions and 0 deletions
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raycastlib.h
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@ -103,6 +103,10 @@ typedef struct
Vector2D resolution;
Unit fovAngle;
Unit height;
Unit collisionRadius;
Unit collisionHeightBelow;
Unit collisionHeightAbove;
} Camera;
/**
@ -203,6 +207,10 @@ void render(Camera cam, ArrayFunction floorHeightFunc,
ArrayFunction ceilingHeightFunc, ArrayFunction typeFunction,
PixelFunction pixelFunc, RayConstraints constraints);
void moveCameraWithCollision(Camera *camera, Vector2D planeOffset,
Unit heightOffset, ArrayFunction floorHeightFunc,
ArrayFunction ceilingHeightFunc);
//=============================================================================
// privates
@ -947,4 +955,58 @@ Unit perspectiveScale(Unit originalSize, Unit distance)
: 0;
}
void moveCameraWithCollision(Camera *camera, Vector2D planeOffset,
Unit heightOffset, ArrayFunction floorHeightFunc,
ArrayFunction ceilingHeightFunc)
{
// TODO: have the cam coll parameters precomputed as macros? => faster
Vector2D corner; // we're only interested in the corner of the BBox
Vector2D cornerNew;
int16_t xDir = planeOffset.x > 0 ? 1 : (planeOffset.x < 0 ? -1 : 0);
int16_t yDir = planeOffset.y > 0 ? 1 : (planeOffset.y < 0 ? -1 : 0);
corner.x = camera->position.x + xDir * camera->collisionRadius;
corner.y = camera->position.y + yDir * camera->collisionRadius;
int16_t xSquare = divRoundDown(corner.x,UNITS_PER_SQUARE);
int16_t ySquare = divRoundDown(corner.y,UNITS_PER_SQUARE);
cornerNew.x = corner.x + planeOffset.x;
cornerNew.y = corner.y + planeOffset.y;
int16_t xSquareNew = divRoundDown(cornerNew.x,UNITS_PER_SQUARE);
int16_t ySquareNew = divRoundDown(cornerNew.y,UNITS_PER_SQUARE);
int8_t xCollides =
xSquare != xSquareNew &&
floorHeightFunc(xSquareNew,ySquare) > UNITS_PER_SQUARE;
int8_t yCollides =
ySquare != ySquareNew &&
floorHeightFunc(xSquare,ySquareNew) > UNITS_PER_SQUARE;
#define collideHelper(dir)\
if (dir##Collides)\
cornerNew.dir = (dir##Square) * UNITS_PER_SQUARE + UNITS_PER_SQUARE / 2 +\
dir##Dir * (UNITS_PER_SQUARE / 2) - dir##Dir;
collideHelper(x)
collideHelper(y)
#undef collideHelper
camera->position.x = cornerNew.x - xDir * camera->collisionRadius;
camera->position.y = cornerNew.y - yDir * camera->collisionRadius;
camera->height += heightOffset;
/*
camera->height = clamp(camera->height,
floorHeight2 + camera->collisionHeightBelow,
ceilHeight2 - camera->collisionHeightAbove);
*/
}
#endif