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Add simple render
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1 changed files with 25 additions and 6 deletions
31
raycastlib.h
31
raycastlib.h
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@ -675,6 +675,7 @@ ArrayFunction _ceilFunction = 0;
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uint8_t _computeTextureCoords = 0;
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Unit _fogStartYBottom = 0;
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Unit _fogStartYTop = 0;
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int16_t _cameraHeightScreen = 0;
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/**
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Helper function that determines intersection with both ceiling and floor.
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@ -928,6 +929,11 @@ void _columnFunctionSimple(HitResult *hits, uint16_t hitCount, uint16_t x,
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{
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int16_t y = 0;
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int16_t wallScreenHeight = 0;
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int16_t coordHelper = 0;
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int16_t wallStart = _middleRow;
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int16_t wallEnd = _middleRow;
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int16_t heightOffset = 0;
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Unit dist = 1;
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PixelInfo p;
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@ -941,10 +947,19 @@ void _columnFunctionSimple(HitResult *hits, uint16_t hitCount, uint16_t x,
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int16_t wallHeightWorld = _floorFunction(hit.square.x,hit.square.y);
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wallScreenHeight = perspectiveScale((wallHeightWorld *
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_camera.resolution.y) / UNITS_PER_SQUARE,dist);
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}
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int16_t wallStart = clamp(_middleRow - wallScreenHeight / 2,0,_camResYLimit);
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int16_t wallEnd = clamp(wallStart + wallScreenHeight,0,_camResYLimit);
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heightOffset = perspectiveScale(_cameraHeightScreen,dist);
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wallStart = _middleRow - wallScreenHeight / 2 + heightOffset;
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coordHelper = -1 * wallStart;
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coordHelper = coordHelper >= 0 ? coordHelper : 0;
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wallStart = clamp(wallStart,0,_camResYLimit);
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wallEnd = clamp(wallStart + wallScreenHeight,0,_camResYLimit);
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}
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// draw ceiling
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@ -958,6 +973,7 @@ void _columnFunctionSimple(HitResult *hits, uint16_t hitCount, uint16_t x,
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p.position.y = y;
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_pixelFunction(p);
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++y;
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p.depth += _floorDepthStep;
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}
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// draw wall
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@ -966,8 +982,6 @@ void _columnFunctionSimple(HitResult *hits, uint16_t hitCount, uint16_t x,
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p.isFloor = 1;
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p.depth = dist;
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int16_t coordHelper = 0;
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while (y < wallEnd)
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{
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p.position.y = y;
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@ -983,13 +997,14 @@ void _columnFunctionSimple(HitResult *hits, uint16_t hitCount, uint16_t x,
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// draw floor
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p.isWall = 0;
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p.depth = 1;
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p.depth = _middleRow * _floorDepthStep;
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while (y < _camera.resolution.y)
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{
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p.position.y = y;
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_pixelFunction(p);
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++y;
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p.depth -= _floorDepthStep;
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}
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}
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@ -1040,6 +1055,10 @@ void renderSimple(Camera cam, ArrayFunction floorHeightFunc,
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_middleRow = cam.resolution.y / 2;
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_computeTextureCoords = constraints.computeTextureCoords;
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_cameraHeightScreen =
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(_camera.resolution.y * (_camera.height - UNITS_PER_SQUARE)) /
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UNITS_PER_SQUARE;
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// TODO
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_floorDepthStep = (12 * UNITS_PER_SQUARE) / cam.resolution.y;
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