DrawTextureMapScanLineBase

Base class for drawing scanline by the texture mapper.

Public Functions

virtual void	drawTextureMapScanLineSubdivisions(int subdivisions, const int widthModLength, int pixelsToDraw, const int affineLength, float oneOverZRight, float UOverZRight, float VOverZRight, fixed16_16 U, fixed16_16 V, fixed16_16 deltaU, fixed16_16 deltaV, float ULeft, float VLeft, float URight, float VRight, float ZRight, const DrawingSurface & dest, const int destX, const int destY, const TextureSurface & texture, uint8_t alpha, const float dOneOverZdXAff, const float dUOverZdXAff, const float dVOverZdXAff) =0
	Draw texture map scan line subdivisions.
virtual	~DrawTextureMapScanLineBase()
	Finalizes an instance of the DrawTextureMapScanLineBase class.

Protected Functions

FORCE_INLINE_FUNCTION void	drawTextureMapNextSubdivision(float & ULeft, float & VLeft, float & ZRight, float & URight, float & VRight, float & oneOverZRight, const float dOneOverZdXAff, float & UOverZRight, const float dUOverZdXAff, float & VOverZRight, const float dVOverZdXAff, const int affineLength, fixed16_16 & U, fixed16_16 & V, fixed16_16 & deltaU, fixed16_16 & deltaV)
	Draw texture map next subdivision.
FORCE_INLINE_FUNCTION bool	is1Inside(int value, int limit)
	Check if value is inside [0..limit[.
FORCE_INLINE_FUNCTION bool	is1x1Inside(int x, int y, int width, int height)
	Check if (x,y) is inside ([0..width[, [0..height[)
FORCE_INLINE_FUNCTION bool	is2Inside(int value, int limit)
	Check if both value and value+1 are inside [0..limit[.
FORCE_INLINE_FUNCTION bool	is2PartiallyInside(int value, int limit)
	Check if either value or value+1 is inside [0..limit[.
FORCE_INLINE_FUNCTION bool	is2x2Inside(int x, int y, int width, int height)
	Check if both (x,y) and (x+1,y+1) are inside ([0..width[,[0..height[)
FORCE_INLINE_FUNCTION bool	is2x2PartiallyInside(int x, int y, int width, int height)
	Check if either (x,y) or (x+1,y+1) is inside ([0..width[,[0..height[)

Protected Attributes

const fixed16_16	half
	1/2 in fixed16_16 format

Public Functions Documentation

drawTextureMapScanLineSubdivisions

virtual void drawTextureMapScanLineSubdivisions	(	int	subdivisions ,		=0
		const int	widthModLength ,		=0
		int	pixelsToDraw ,		=0
		const int	affineLength ,		=0
		float	oneOverZRight ,		=0
		float	UOverZRight ,		=0
		float	VOverZRight ,		=0
		fixed16_16	U ,		=0
		fixed16_16	V ,		=0
		fixed16_16	deltaU ,		=0
		fixed16_16	deltaV ,		=0
		float	ULeft ,		=0
		float	VLeft ,		=0
		float	URight ,		=0
		float	VRight ,		=0
		float	ZRight ,		=0
		const DrawingSurface &	dest ,		=0
		const int	destX ,		=0
		const int	destY ,		=0
		const TextureSurface &	texture ,		=0
		uint8_t	alpha ,		=0
		const float	dOneOverZdXAff ,		=0
		const float	dUOverZdXAff ,		=0
		const float	dVOverZdXAff		=0
		)	=0

Draw texture map scan line subdivisions.

Parameters:

subdivisions	The number of subdivisions.
widthModLength	Remainder of length (after subdivisions).
pixelsToDraw	The pixels to draw.
affineLength	Length of one subdivision.
oneOverZRight	1/Z right.
UOverZRight	U/Z right.
VOverZRight	V/Z right.
U	U Coordinate in fixed16_16 notation.
V	V Coordinate in fixed16_16 notation.
deltaU	U delta to get to next pixel coordinate.
deltaV	V delta to get to next pixel coordinate.
ULeft	The left U.
VLeft	The left V.
URight	The right U.
VRight	The right V.
ZRight	The right Z.
dest	Destination drawing surface.
destX	Destination x coordinate.
destY	Destination y coordinate.
texture	The texture.
alpha	The global alpha.
dOneOverZdXAff	1/ZdX affine.
dUOverZdXAff	U/ZdX affine.
dVOverZdXAff	V/ZdX affine.

~DrawTextureMapScanLineBase

virtual ~DrawTextureMapScanLineBase	(			)

Finalizes an instance of the DrawTextureMapScanLineBase class.

Protected Functions Documentation

drawTextureMapNextSubdivision

FORCE_INLINE_FUNCTION void drawTextureMapNextSubdivision	(	float &	ULeft ,
		float &	VLeft ,
		float &	ZRight ,
		float &	URight ,
		float &	VRight ,
		float &	oneOverZRight ,
		const float	dOneOverZdXAff ,
		float &	UOverZRight ,
		const float	dUOverZdXAff ,
		float &	VOverZRight ,
		const float	dVOverZdXAff ,
		const int	affineLength ,
		fixed16_16 &	U ,
		fixed16_16 &	V ,
		fixed16_16 &	deltaU ,
		fixed16_16 &	deltaV
		)

Draw texture map next subdivision.

Parameters:

ULeft	U left.
VLeft	V left.
ZRight	Z right.
URight	U right.
VRight	V right.
oneOverZRight	1/Z right.
dOneOverZdXAff	d1/ZdX affine.
UOverZRight	U/Z right.
dUOverZdXAff	dU/ZdX affine.
VOverZRight	V/Z right.
dVOverZdXAff	dV/ZdX affine.
affineLength	Length of the affine.
U	Bitmap X in fixed16_16.
V	Bitmap Y in fixed16_16.
deltaU	U delta.
deltaV	V delta.

is1Inside

FORCE_INLINE_FUNCTION bool is1Inside	(	int	value ,
		int	limit
		)

Check if value is inside [0..limit[.

Parameters:

value	Value to check.
limit	Upper limit.

Returns:

true if value is inside given limit.

is1x1Inside

FORCE_INLINE_FUNCTION bool is1x1Inside	(	int	x ,
		int	y ,
		int	width ,
		int	height
		)

Check if (x,y) is inside ([0..width[, [0..height[)

Parameters:

x	X coordinate.
y	Y coordinate.
width	X limit.
height	Y limit.

Returns:

true if (x,y) is inside given limits.

is2Inside

FORCE_INLINE_FUNCTION bool is2Inside	(	int	value ,
		int	limit
		)

Check if both value and value+1 are inside [0..limit[.

Parameters:

value	Value to check.
limit	Upper limit.

Returns:

true if value and value+1 are inside given limit.

is2PartiallyInside

FORCE_INLINE_FUNCTION bool is2PartiallyInside	(	int	value ,
		int	limit
		)

Check if either value or value+1 is inside [0..limit[.

Parameters:

value	Value to check.
limit	Upper limit.

Returns:

true if either value or value+1 is inside given limit.

is2x2Inside

FORCE_INLINE_FUNCTION bool is2x2Inside	(	int	x ,
		int	y ,
		int	width ,
		int	height
		)

Check if both (x,y) and (x+1,y+1) are inside ([0..width[,[0..height[)

Parameters:

x	X coordinate.
y	Y coordinate.
width	X limit.
height	Y limit.

Returns:

true if (x,y) and (x+1,y+1) are inside given limits.

is2x2PartiallyInside

FORCE_INLINE_FUNCTION bool is2x2PartiallyInside	(	int	x ,
		int	y ,
		int	width ,
		int	height
		)

Check if either (x,y) or (x+1,y+1) is inside ([0..width[,[0..height[)

Parameters:

x	X coordinate.
y	Y coordinate.
width	X limit.
height	Y limit.

Returns:

true if either (x,y) or (x+1,y+1) is inside given limits.

Protected Attributes Documentation

half

const fixed16_16 half = 0x8000

1/2 in fixed16_16 format