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Render floor
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parent
d449c7b52e
commit
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1 changed files with 28 additions and 7 deletions
35
raycastlib.h
35
raycastlib.h
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@ -495,6 +495,8 @@ Camera _camera;
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void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
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{
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int32_t y = _camera.resolution.y - 1;
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for (uint32_t j = 0; j < hitCount; ++j)
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{
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HitResult hit = hits[j];
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@ -516,17 +518,36 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
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Unit offset = perspectiveScale(_camera.height - z,dist,1);
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uint32_t start = _camera.resolution.y / 2 - height / 2 + offset;
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int32_t start = _camera.resolution.y / 2 + height / 2 + offset;
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for (uint32_t i = start; i < start + height; ++i)
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PixelInfo p;
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p.position.x = x;
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p.isWall = 0;
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// draw floor until the wall
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for (int32_t i = y; i > start; --i)
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{
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PixelInfo p;
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p.position.x = x;
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p.position.y = i;
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p.isWall = 1;
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p.hit = hit;
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_pixelFunction(p);
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}
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int32_t yPrev = y;
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y = start - height;
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if (y > yPrev) // don't overwrite the previous - y can only get smaller
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y = yPrev;
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start = start > yPrev ? yPrev : start;
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p.isWall = 1;
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// draw the wall
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for (int32_t i = start; i > (y < 0 ? 0 : y); --i)
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{
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p.position.y = i;
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p.hit = hit;
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_pixelFunction(p);
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}
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}
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