3D Rendering More...

Data Structures
struct	T_3dFloorRun

struct	T_3dObjectColRun

struct	T_3dObjectRun

struct	T_3dObjectRunInfo

struct	T_3dWall

struct	T_3dWallRun

struct	T_3dWallSlice

struct	T_floorInfo

struct	T_horzFloorInfo

struct	T_pictureRaster

struct	T_vertFloorInfo

Macros
#define	LOWER_TYPE 2

#define	M_PI 3.14159265358979323846

#define	MAX_FIND_SECTOR_LINES 20

#define	MAX_FLOOR_INDEXES 40

#define	MAX_FLOOR_INFO 5000

#define	MAX_INTERSECTIONS 50

#define	MAX_OBJECT_COLUMN_RUNS 8000

#define	MAX_OBJECT_COLUMNS 50

#define	MAX_OBJECTS 500

#define	MAX_WALL_RUNS 8000

#define	MAX_WALL_SLICES_PER_COLUMN 10

#define	NEXT_IS_NONE 0

#define	P_vgaBuffer ((T_byte8 *)0xA0000)

#define	SECTOR_IS_UNKNOWN 0x8000

#define	SECTOR_IS_WALL 0xFFFF

#define	SECTOR_NONE 0xFFFF

#define	UPPER_TYPE 0

#define	VIEW3D_CROSS_RATIO (65536 / VIEW3D_WIDTH)

#define	VIEW_3D_LEFT_ANGLE 0x2000

#define	WALL_TYPE 1

#define	ZMIN ((T_sword32) 10 << 16)

Functions
T_word16	CalculateDistance (T_sword32 x1, T_sword32 y1, T_sword32 x2, T_sword32 y2)

T_word16	CalculateDistanceOld2 (T_sword16 x1, T_sword16 y1, T_sword16 x2, T_sword16 y2)

T_word16	CalculateDistanceOld3 (T_sword16 x1, T_sword16 y1, T_sword16 x2, T_sword16 y2)

T_word16	CalculateEstimateDistance (T_sword16 x1, T_sword16 y1, T_sword16 x2, T_sword16 y2)

T_void	ClearSampleAsm (T_byte8 *ptr)

T_word16	DebugIFindSectorNum (T_sword16 x, T_sword16 y)

T_void	DrawObjectColumnAsm (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureColumnAsm1 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureColumnAsm128 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureColumnAsm16 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureColumnAsm2 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureColumnAsm256 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureColumnAsm32 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureColumnAsm4 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureColumnAsm64 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureColumnAsm8 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm1 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm128 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm16 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm2 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm256 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm32 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm4 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm64 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTextureRowAsm8 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransColumnAsm (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentColumnAsm1 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentColumnAsm128 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentColumnAsm16 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentColumnAsm2 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentColumnAsm256 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentColumnAsm32 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentColumnAsm4 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentColumnAsm64 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentColumnAsm8 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTranslucentObjectColumnAsm (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransparentColumnAsm1 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransparentColumnAsm128 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransparentColumnAsm16 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransparentColumnAsm2 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransparentColumnAsm256 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransparentColumnAsm32 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransparentColumnAsm4 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransparentColumnAsm64 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransparentColumnAsm8 (T_byte8 p_shade, T_word32 count, T_sword32 textureStep, T_sword32 textureOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm1 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm128 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm16 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm2 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm256 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm32 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm4 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm64 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_void	DrawTransRowAsm8 (T_byte8 p_shade, T_word32 count, T_sword32 xOffset, T_sword32 yOffset, T_byte8 p_pixel)

T_sword32	FindInterXAsm (T_sword32 deltaX, T_sword32 deltaZ, T_sword32 tanViewAngle, T_sword32 zTop)

T_void	IAddLowerWall (T_void)

T_void	IAddMainWall (T_void)

T_void	IAddObjectSlice (T_sword32 zDist, T_sword16 x, T_sword16 clipTop, T_sword16 clipBottom)

T_void	IAddUpperWall (T_void)

T_void	IAddWall (T_sword16 sx1, T_sword16 sx2, T_sword16 relativeBottom, T_sword16 relativeTop, T_sword16 relativeFromZ, T_sword16 relativeToZ)

T_void	ICalculateWallMatrix (T_void)

E_Boolean	ICheckValidRow (T_word16 row, T_word16 run)

E_Boolean	ICheckValidRow2 (T_word16 row, T_word16 run)

int	ICompareObjectRuns (const void first, const void second)

T_word32	IDetermineDistToLine (T_sword16 x, T_sword16 y, T_word16 lineNum)

T_byte8 *	IDetermineShade (T_sword32 distance, T_word16 shadeStart)

T_void	IDrawColumn (T_word16 x, T_word16 top, T_word16 bottom, T_byte8 color)

T_void	IDrawFloorRun (T_word16 y, T_horzFloorInfo *p_floor)

T_void	IDrawNode (T_word16 nodeIndex)

T_void	IDrawObjectAndWallRuns (T_void)

T_void	IDrawObjectColumn (T_word16 column, T_3dObjectColRun *p_objCol)

T_void	IDrawPixel (T_byte8 *p_pixel, T_byte8 color)

T_void	IDrawRow (T_word16 y, T_word16 left, T_word16 right, T_byte8 color)

T_void	IDrawRuns (T_void)

T_void	IDrawSegment (T_word16 segmentIndex)

T_void	IDrawSSector (T_word16 ssectorIndex)

T_void	IDrawTextureColumn (T_word16 x, T_3dWallRun *p_run)

T_void	IDrawTextureColumnNew (T_byte8 p_shade, T_word16 numPixels, T_word32 textureStep, T_word32 textureOffset, T_byte8 p_pixel, T_byte8 shift)

T_void	IDumpVertFloor (T_void)

T_sword32	IFindIntersectX (T_word16 line, T_sword16 y)

E_Boolean	IFindObject (T_3dObject *p_obj)

T_void	IFindObjects (T_void)

T_word16	IFindSectorNum (T_sword16 x, T_sword16 y)

E_Boolean	IIsSegmentGood (T_word16 segmentIndex)

T_void	IMarkOffWall (T_void)

T_sword16	IObjectPartition (T_sword16 p, T_sword16 r)

T_byte8	IOnRightOfLine (T_sword16 x, T_sword16 y, T_word16 line)

T_word16	IQuickSquareRoot (T_word32 value)

T_void	ISetupDistanceTable (T_void)

T_void	ISortObjectQuick (T_sword16 p, T_sword16 q)

T_void	ISortObjects (T_void)

T_sword32	MultAndDivideAsm (T_sword32 multA, T_sword32 multB, T_sword32 divC)

T_sword32	MultAndShift16 (T_sword32 a, T_sword32 b)

T_sword32	MultAndShift22 (T_sword32 a, T_sword32 b)

T_sword32	MultAndShift32 (T_sword32 a, T_sword32 b)

T_sword32	MultAndShift6 (T_sword32 a, T_sword32 b)

T_void	View3dAddObject (T_3dObject *p_obj)

T_3dObject *	View3dAllocateObject (T_void)

T_void	View3dCheckObjectListEmpty (T_void)

T_void	View3dClipCenter (T_word16 centerWidth)

T_void	View3dDisplayView (T_void)

T_void	View3dDrawView (T_void)

T_word16	View3dFindClosestLine (T_sword16 x, T_sword16 y)

T_word16	View3dFindSide (T_sword16 x, T_sword16 y)

T_void	View3dFinish (T_void)

T_void	View3dFreeObject (T_3dObject *p_obj)

T_word16	View3dGetObjectAtColumn (T_word16 objPos, T_3dObject **p_obj, T_word16 column)

T_word16	View3dGetObjectAtXY (T_word16 objPos, T_3dObject **p_obj, T_word16 x, T_word16 y)

T_word16	View3dGetSectorSide (T_word16 lineNum, T_sword16 x, T_sword16 y)

T_word16	View3dGetSide (T_word16 lineNum, T_sword16 x, T_sword16 y)

T_sword32	View3dGetUpDownAngle (T_void)

T_void	View3dGetView (T_sword16 p_x, T_sword16 p_y, T_sword32 p_height, T_word16 p_angle)

T_void	View3dInitialize (T_void)

T_byte8	View3dLeftSideInCone (T_word16 nodeIndex)

T_byte8	View3dOnRightByNode (T_word16 nodeIndex)

T_byte8	View3dOnRightByNodeWithXY (T_word16 nodeIndex, T_sword16 x, T_sword16 y)

T_byte8	View3dOnRightByVertices (T_word16 from, T_word16 to)

T_byte8	View3dOnRightByVerticesXY (T_word16 from, T_word16 to, T_sword16 x, T_sword16 y)

T_void	View3dRemapSectors (T_void)

T_void	View3dRemoveObject (T_3dObject *p_obj)

T_byte8	View3dRightSideInCone (T_word16 nodeIndex)

T_void	View3dSetDarknessAdjustment (T_sbyte8 darkAdjust)

T_void	View3dSetHeight (T_sword32 height)

T_void	View3dSetSize (T_word16 width, T_word16 height)

T_void	View3dSetUpDownAngle (T_sword32 alpha)

T_void	View3dSetView (T_sword16 x, T_sword16 y, T_sword32 height, T_word16 angle)

T_void	View3dUnmapSectors (T_void)

T_void	View3dUpdateSectorLightAnimation (T_void)

Variables
T_sword32	G_3dCosPlayerLeftAngle

T_sword32	G_3dCosPlayerRightAngle

T_sword32	G_3dSinPlayerLeftAngle

T_sword32	G_3dSinPlayerRightAngle

T_word16	G_allocatedColRun = 0

T_sword32	G_alpha = 0x0000

T_byte8 *	G_backdrop = NULL
	T_byte8 *GG_palette ;. More...

T_word16	G_backdropOffset = 0

T_word16	G_colCount

T_byte8	G_colDone [MAX_VIEW3D_WIDTH]

T_byte8 *	G_CurrentTexturePos

T_sbyte8	G_darknessAdjustment

E_Boolean	G_didDrawWall

T_word16	G_firstSSector

T_word16	G_intCount [MAX_VIEW3D_WIDTH]

T_word16	G_intersections [MAX_INTERSECTIONS][MAX_VIEW3D_WIDTH]

T_sword16	G_maxY [MAX_VIEW3D_WIDTH]

T_sword16	G_minY [MAX_VIEW3D_WIDTH]

T_word16	G_nodeCount

T_word16	G_numVertFloor

T_byte8	G_numWallSlices [MAX_VIEW3D_WIDTH]

T_word16	G_objColumnEnd

T_word16	G_objColumnStart

T_3dObjectColRun	G_objectColRunList [MAX_OBJECT_COLUMN_RUNS]

T_word16	G_objectColStart [MAX_VIEW3D_WIDTH]

T_word16	G_objectCount

T_3dObjectRun	G_objectRun [MAX_OBJECTS]

T_word16 *	G_remapSectorCeilingArray

T_word16 *	G_remapSectorFloorArray

T_sword32	G_screenObjectDistance [MAX_VIEW3D_WIDTH]

T_word16	G_screenObjectPosition [MAX_VIEW3D_WIDTH]

T_word16	G_segCount

T_byte8	G_squareRootTable [16384]

T_word32	G_textureAndX =63

T_word32	G_textureAndY =63

T_word16	G_textureShift =6

T_sword32	G_textureStepX

T_sword32	G_textureStepY

T_vertFloorInfo	G_vertFloorInfo [MAX_FLOOR_INFO]

T_word16	G_vertFloorStarts [MAX_VIEW3D_WIDTH]

T_3dWall	G_wall

T_word16	G_wallAttempt

T_word16	G_wallCount

T_word16	G_wallRunCount

T_3dWallSlice	G_wallSlices [MAX_VIEW3D_WIDTH][MAX_WALL_SLICES_PER_COLUMN]

T_byte8 *	P_doubleBuffer

T_byte8	P_shadeIndex [16384]

T_sword16	VIEW3D_CLIP_LEFT = 100

T_sword16	VIEW3D_CLIP_RIGHT = 200

T_sword16	VIEW3D_EVEN_HALF_HEIGHT = 70

T_sword16	VIEW3D_HALF_HEIGHT = 70

T_sword16	VIEW3D_HALF_WIDTH = 150

T_sword16	VIEW3D_HEIGHT = 140

T_sword16	VIEW3D_WIDTH = 300

Detailed Description

3D Rendering

All 3D rendering is done through this section of code.

See Also: http://www.amuletsandarmor.com/AALicense.txt

Macro Definition Documentation

#define LOWER_TYPE 2

#define M_PI 3.14159265358979323846

#define MAX_FIND_SECTOR_LINES 20

#define MAX_FLOOR_INDEXES 40

#define MAX_FLOOR_INFO 5000

#define MAX_INTERSECTIONS 50

#define MAX_OBJECT_COLUMN_RUNS 8000

#define MAX_OBJECT_COLUMNS 50

#define MAX_OBJECTS 500

#define MAX_WALL_RUNS 8000

#define MAX_WALL_SLICES_PER_COLUMN 10

#define NEXT_IS_NONE 0

#define P_vgaBuffer ((T_byte8 *)0xA0000)

#define SECTOR_IS_UNKNOWN 0x8000

#define SECTOR_IS_WALL 0xFFFF

#define SECTOR_NONE 0xFFFF

#define UPPER_TYPE 0

#define VIEW3D_CROSS_RATIO (65536 / VIEW3D_WIDTH)

#define VIEW_3D_LEFT_ANGLE 0x2000

#define WALL_TYPE 1

#define ZMIN ((T_sword32) 10 << 16)

Function Documentation

T_word16 CalculateDistance	(	T_sword32	x1,
		T_sword32	y1,
		T_sword32	x2,
		T_sword32	y2
	)

T_word16 CalculateDistanceOld2	(	T_sword16	x1,
		T_sword16	y1,
		T_sword16	x2,
		T_sword16	y2
	)

T_word16 CalculateDistanceOld3	(	T_sword16	x1,
		T_sword16	y1,
		T_sword16	x2,
		T_sword16	y2
	)

T_word16 CalculateEstimateDistance	(	T_sword16	x1,
		T_sword16	y1,
		T_sword16	x2,
		T_sword16	y2
	)

T_void ClearSampleAsm ( T_byte8 * ptr)

T_word16 DebugIFindSectorNum	(	T_sword16	x,
		T_sword16	y
	)

puts("Here") ;

printf("line=%d, side=%d", closestLine, side) ;

T_void DrawObjectColumnAsm	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureColumnAsm1	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureColumnAsm128	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureColumnAsm16	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureColumnAsm2	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureColumnAsm256	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureColumnAsm32	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureColumnAsm4	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureColumnAsm64	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureColumnAsm8	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm1	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm128	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm16	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm2	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm256	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm32	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm4	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm64	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTextureRowAsm8	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransColumnAsm	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentColumnAsm1	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentColumnAsm128	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentColumnAsm16	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentColumnAsm2	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentColumnAsm256	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentColumnAsm32	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentColumnAsm4	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentColumnAsm64	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentColumnAsm8	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTranslucentObjectColumnAsm	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransparentColumnAsm1	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransparentColumnAsm128	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransparentColumnAsm16	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransparentColumnAsm2	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransparentColumnAsm256	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransparentColumnAsm32	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransparentColumnAsm4	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransparentColumnAsm64	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransparentColumnAsm8	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	textureStep,
		T_sword32	textureOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm1	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm128	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm16	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm2	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm256	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm32	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm4	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm64	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_void DrawTransRowAsm8	(	T_byte8 *	p_shade,
		T_word32	count,
		T_sword32	xOffset,
		T_sword32	yOffset,
		T_byte8 *	p_pixel
	)

T_sword32 FindInterXAsm	(	T_sword32	deltaX,
		T_sword32	deltaZ,
		T_sword32	tanViewAngle,
		T_sword32	zTop
	)

T_void IAddLowerWall ( T_void )

IAddLowerWall sets up a lower wall to be draw by the 3d engine.

T_void IAddMainWall ( T_void )

IAddMainWall sets up a main wall to be draw by the 3d engine.

T_void IAddObjectSlice	(	T_sword32	zDist,
		T_sword16	x,
		T_sword16	clipTop,
		T_sword16	clipBottom
	)

T_void IAddUpperWall ( T_void )

IAddUpperWall sets up a upper wall to be draw by the 3d engine.

T_void IAddWall	(	T_sword16	sx1,
		T_sword16	sx2,
		T_sword16	relativeBottom,
		T_sword16	relativeTop,
		T_sword16	relativeFromZ,
		T_sword16	relativeToZ
	)

IAddWall is called once a wall has been found to be on the screen, has been clipped, and the full coordinates have been located. This routine "draws" the wall into the run lists.

Parameters

sx1	– Screen X1 coordinate
sx2	– Screen X2 coordinate
relativeBottom	– Height of the wall at base
relativeTop	– Height of the wall at top
relativeFromZ	– Distance to first coordinate along Z
relativeToZ	– Distance to second coordinate along Z

T_void ICalculateWallMatrix ( T_void )

ICalculateWallMatrix determines the matrix for a wall segment given that it has already been determined to be on the screen. Directly changes the matrix values in G_wall

NOTE: Must call IIsSegmentGood any time before this routine.

E_Boolean ICheckValidRow	(	T_word16	row,
		T_word16	run
	)

E_Boolean ICheckValidRow2	(	T_word16	row,
		T_word16	run
	)

int ICompareObjectRuns	(	const void *	first,
		const void *	second
	)

T_word32 IDetermineDistToLine	(	T_sword16	x,
		T_sword16	y,
		T_word16	lineNum
	)

printf("Line %d, xA=%d, xB=%d, angle=%d, dy=%d, dx=%d -- ", lineNum, xA, xB, angle, y2-y1, x2-x1) ;

puts("Yes") ;

puts("No") ;

T_byte8 * IDetermineShade	(	T_sword32	distance,
		T_word16	shadeStart
	)

T_void IDrawColumn	(	T_word16	x,
		T_word16	top,
		T_word16	bottom,
		T_byte8	color
	)

IDrawColumn draws a vertical line at the given x position from the given top and bottom pixels. The color is also passed in.

Parameters

x	– X position on screen
top	– Top Y position
bottom	– Bottom Y position
color	– Color to draw line in

T_void IDrawFloorRun	(	T_word16	y,
		T_horzFloorInfo *	p_floor
	)

T_void IDrawNode ( T_word16 nodeIndex)

IDrawNode is a self-calling recursive routine that travels through the BSP tree and determines the order that walls (and floors) should be drawn.

Parameters

nodeIndex – Index to head node of sub-BSP tree

T_void IDrawObjectAndWallRuns ( T_void )

T_void IDrawObjectColumn	(	T_word16	column,
		T_3dObjectColRun *	p_objCol
	)

T_void IDrawPixel	(	T_byte8 *	p_pixel,
		T_byte8	color
	)

T_void IDrawRow	(	T_word16	y,
		T_word16	left,
		T_word16	right,
		T_byte8	color
	)

IDrawColumn draws a vertical line at the given x position from the given top and bottom pixels. The color is also passed in.

Parameters

y	– Y position on screen
left	– Left X position
right	– Right Y position
color	– Color to draw line in

T_void IDrawRuns ( T_void )

IDrawRuns does the actual work of drawing all the different parts onto the screen.

T_void IDrawSegment ( T_word16 segmentIndex)

IDrawSegment does all the work to determine if the given segment can be drawn on the screen and if so, calls the appropriate routines to add the wall and floor runs.

Parameters

segmentIndex – Segment to draw

T_void IDrawSSector ( T_word16 ssectorIndex)

IDrawSSector draws all the facing sectors in a segment sector.

Parameters

ssectorIndex – Index to segment sector

T_void IDrawTextureColumn	(	T_word16	x,
		T_3dWallRun *	p_run
	)

IDrawTextureColumn draws a vertical line using a given run length and column.

Parameters

x	– X position on screen
p_run	– Wall run length to draw

p_shade = &P_shadeIndex[p_run->shadeIndex<<8] ;

p_pixel = &P_doubleBuffer[((top << 2) + (top << 4)) + (x>>2)] ;

T_void IDrawTextureColumnNew	(	T_byte8 *	p_shade,
		T_word16	numPixels,
		T_word32	textureStep,
		T_word32	textureOffset,
		T_byte8 *	p_pixel,
		T_byte8	shift
	)

IDrawTextureColumnNew is the new version of IDrawTextureColumn. The difference is that this routine JUST dispatches the data to the correct texture drawing routine. No calculations are done on this level any more.

Parameters

p_shade	– Pointer into shade table
numPixels	– How many pixels high to draw
textureStep	– How fast to step through the texture
textureOffset	– Start position in texture
p_pixel	– First position on the screen
shift	– Texture power of 2 factor up and down

T_void IDumpVertFloor ( T_void )

T_sword32 IFindIntersectX	(	T_word16	line,
		T_sword16	y
	)

E_Boolean IFindObject ( T_3dObject * p_obj)

Apply lighting only if applicable.

T_void IFindObjects ( T_void )

IFindObjects locates all objects in the view and add them to the wall runs.

T_word16 IFindSectorNum	(	T_sword16	x,
		T_sword16	y
	)

E_Boolean IIsSegmentGood ( T_word16 segmentIndex)

IIsSegmentGood determines if a segment is in the view and if it will be drawn on the screen.

Parameters

segmentIndex – Segment to check if need to draw.

T_void IMarkOffWall ( T_void )

IMarkOffWall goes through all the columns in a wall and marks off any empty slots. This signifies that the column is done and is no longer going to have anything drawn onto it.

T_sword16 IObjectPartition	(	T_sword16	p,
		T_sword16	r
	)

T_byte8 IOnRightOfLine	(	T_sword16	x,
		T_sword16	y,
		T_word16	line
	)

T_word16 IQuickSquareRoot ( T_word32 value)

IQuickSquareRoot uses an approximation method to calculate the square root of a 32 bit number (into a 16 bit number).

Parameters

value – 32 bit number to take square root of

Returns: square root calculated

T_void ISetupDistanceTable ( T_void )

T_void ISortObjectQuick	(	T_sword16	p,
		T_sword16	q
	)

T_void ISortObjects ( T_void )

T_sword32 MultAndDivideAsm	(	T_sword32	multA,
		T_sword32	multB,
		T_sword32	divC
	)

T_sword32 MultAndShift16	(	T_sword32	a,
		T_sword32	b
	)

T_sword32 MultAndShift22	(	T_sword32	a,
		T_sword32	b
	)

T_sword32 MultAndShift32	(	T_sword32	a,
		T_sword32	b
	)

T_sword32 MultAndShift6	(	T_sword32	a,
		T_sword32	b
	)

T_void View3dAddObject ( T_3dObject * p_obj)

View3dAddObject attaches a new object to the list of objects in the 3d world.

Parameters

p_obj – Object to bring into world.

T_3dObject* View3dAllocateObject ( T_void )

View3dAllocateObject either finds an old object slot that is no longer being used or allocates a fresh one. The number to the object is returned.

NOTE: None of the fields are initialized, the object is just allocated. The fields need to be setup before another frame is drawn.

Returns: Pointer to the newly created object.

T_void View3dCheckObjectListEmpty ( T_void )

T_void View3dClipCenter ( T_word16 centerWidth)

View3dClipCenter sets up the clipping left and right egdes based on the given view size already. Just pass in how wide you want the final view to be.

NOTE: Do not try to clip a width bigger than the width of the view.

Parameters

centerWidth – How width is the clipped view.

T_void View3dDisplayView ( T_void )

View3dDisplayView actually draws/flips to the actual screen to use.

GrScreenSet((T_screen)(P_doubleBuffer-VIEW3D_CLIP_LEFT)) ;

GrTransferRectangle( GRAPHICS_ACTUAL_SCREEN, VIEW3D_CLIP_LEFT, 0, VIEW3D_CLIP_RIGHT-1, VIEW3D_HEIGHT-1, 4, 3) ;

T_void View3dDrawView ( T_void )

View3dDrawView is the main routine to call when you wish to draw the whole view. This routine calls all the other routines necessary.

T_word16 View3dFindClosestLine	(	T_sword16	x,
		T_sword16	y
	)

T_word16 View3dFindSide	(	T_sword16	x,
		T_sword16	y
	)

T_void View3dFinish ( T_void )

View3dFinish closes out all information that is stored in memory.

T_void View3dFreeObject ( T_3dObject * p_obj)

View3dFreeObject deletes an object and updates the links assocaited with it.

Parameters

p_obj – pointer to object to free

T_word16 View3dGetObjectAtColumn	(	T_word16	objPos,
		T_3dObject **	p_obj,
		T_word16	column
	)

View3dGetObjectAtColumn is a utility routine that checks the sorted list of objects to see if there is an object at the given row. The routine takes in the an integer of where in the list it is, a place to store the found object, and the column of where it is to search. It returns where in the list is the next object, or 0xFFFF if at end.

Parameters

objPos	– Position in list to search.
p_obj	– Object found (NULL if none)
column	– Column on screen to search.

Returns: Next position to be searched, or 0xFFFF if at end.

T_word16 View3dGetObjectAtXY	(	T_word16	objPos,
		T_3dObject **	p_obj,
		T_word16	x,
		T_word16	y
	)

View3dGetObjectAtXY is a utility routine that checks the sorted list of objects to see if there is an object at the given X&Y. The routine takes in the an integer of where in the list it is, a place to store the found object, and the X & Y of where it is to search. It returns where in the list is the next object, or 0xFFFF if at end.

Parameters

objPos	– Position in list to search.
p_obj	– Object found (NULL if none)
x	– X (column) on screen to search
y	– Y (row) on screen to search

Returns: Next position to be searched, or 0xFFFF if at end.

T_word16 View3dGetSectorSide	(	T_word16	lineNum,
		T_sword16	x,
		T_sword16	y
	)

T_word16 View3dGetSide	(	T_word16	lineNum,
		T_sword16	x,
		T_sword16	y
	)

T_sword32 View3dGetUpDownAngle ( T_void )

T_void View3dGetView	(	T_sword16 *	p_x,
		T_sword16 *	p_y,
		T_sword32 *	p_height,
		T_word16 *	p_angle
	)

View3dGetView returns the position, angle, and height of the current point of view.

Parameters

p_x	– X position
p_y	– Y position
p_height	– Height of position
p_angle	– Angle being faced

T_void View3dInitialize ( T_void )

END OF GRAPHICS-SPECIFIC (i.e. non-server) CODE SERVER_ONLY View3dInitialize starts up anything that relates to the 3d view.

Server-only build doesn't need graphics.

GG_palette = (T_byte8 *)FileLoad("game.pal", &size) ; DebugCheck(size == 768) ;

T_byte8 View3dLeftSideInCone ( T_word16 nodeIndex)

View3dLeftSideInCone checks to see if the given node (a left child node) is in the current viewing cone.

Parameters

nodeIndex – Number of node to check

Returns: TRUE if on right, FALSE if not

T_byte8 View3dOnRightByNode ( T_word16 nodeIndex)

View3dOnRightByNode checks to see if the player is on the right of a line segment (given by line's node number) and returns TRUE if so (otherwise, FALSE).

Parameters

nodeIndex – Node index to check

Returns: TRUE if player on right of segment, FALSE if not.

T_byte8 View3dOnRightByNodeWithXY	(	T_word16	nodeIndex,
		T_sword16	x,
		T_sword16	y
	)

T_byte8 View3dOnRightByVertices	(	T_word16	from,
		T_word16	to
	)

View3dOnRightByVertices checks to see if the player is on the right of a line segment (given by their vertice indexes) and returns TRUE if so (otherwise, FALSE).

Parameters

from	– From vertex
to	– To vertex

Returns: TRUE if player on right of segment, FALSE if not.

T_byte8 View3dOnRightByVerticesXY	(	T_word16	from,
		T_word16	to,
		T_sword16	x,
		T_sword16	y
	)

T_void View3dRemapSectors ( T_void )

View3dRemapSectors is called after a map is loaded. This routine sets up optimization for floor and ceiling drawing by finding similar ceilings and floors and declares them to be the "same" ceiling and pattern.

NOTE: This routine MUST be called before the wall textures are locked into memory.

T_void View3dRemoveObject ( T_3dObject * p_obj)

View3dRemoveObject detaches an object from the list of objects in the 3d world.

Parameters

p_obj – Object to bring into world.

T_byte8 View3dRightSideInCone ( T_word16 nodeIndex)

View3dRightSideInCone checks to see if the given node (a right child node) is in the current viewing cone.

Parameters

nodeIndex – Number of node to check

Returns: TRUE if on right, FALSE if not

T_void View3dSetDarknessAdjustment ( T_sbyte8 darkAdjust)

View3dSetDarknessAdjustment sets how much light to add to all floors and ceilings. If negative, makes darker.

Parameters

darkAdjust – 0 = Normal, 63=perfect night vision, -63=Blind.

T_void View3dSetHeight ( T_sword32 height)

View3dSetHeight sets the current point of view to the new location and prepares the appropriate calculations.

Parameters

height – Height to move to.

T_void View3dSetSize	(	T_word16	width,
		T_word16	height
	)

T_void View3dSetUpDownAngle ( T_sword32 alpha)

T_void View3dSetView	(	T_sword16	x,
		T_sword16	y,
		T_sword32	height,
		T_word16	angle
	)

BEGIN GRAPHICS-MODE (i.e. not req'd by server) FUNCTION DEFS View3dSetView moves the current point of view to the new location and prepares the appropriate calculations.

Parameters

x	– X position to move to.
y	– Y position to move to.
height	– Height to move to.
angle	– Angle to face.

T_void View3dUnmapSectors ( T_void )

View3dUnmapSectors frees memory used by View3dRemapSectors. It is usually called when a map ends.

T_void View3dUpdateSectorLightAnimation ( T_void )

Updates all sector light animations.

How long has it been since the last update?

Loop through all the sectors.

Add the elapsed time to the light animation state.

Check the type of sector light animation for this sector.

No animation; no action necessary.

Oscillate smoothly between the lower and upper bounds.

This just involves mapping time to a sine wave.

This is pretty simple. Just keep incrementing.

Did I exceed my limit?

Yes. Set my value to the minimum.

Have at least two (scaled) seconds elapsed?

Yes. It's time for a flicker. Pick a random light

value within the limits.

Just copy the light value from another sector.

Variable Documentation

T_sword32 G_3dCosPlayerLeftAngle

T_sword32 G_3dCosPlayerRightAngle

T_sword32 G_3dSinPlayerLeftAngle

T_sword32 G_3dSinPlayerRightAngle

T_word16 G_allocatedColRun = 0

T_sword32 G_alpha = 0x0000

T_byte8* G_backdrop = NULL

T_byte8 *GG_palette ;.

T_word16 G_backdropOffset = 0

T_word16 G_colCount

T_byte8 G_colDone[MAX_VIEW3D_WIDTH]

T_byte8* G_CurrentTexturePos

T_sbyte8 G_darknessAdjustment

E_Boolean G_didDrawWall

T_word16 G_firstSSector

T_word16 G_intCount[MAX_VIEW3D_WIDTH]

T_word16 G_intersections[MAX_INTERSECTIONS][MAX_VIEW3D_WIDTH]

T_sword16 G_maxY[MAX_VIEW3D_WIDTH]

T_sword16 G_minY[MAX_VIEW3D_WIDTH]

T_word16 G_nodeCount

T_word16 G_numVertFloor

T_byte8 G_numWallSlices[MAX_VIEW3D_WIDTH]

T_word16 G_objColumnEnd

T_word16 G_objColumnStart

T_3dObjectColRun G_objectColRunList[MAX_OBJECT_COLUMN_RUNS]

T_word16 G_objectColStart[MAX_VIEW3D_WIDTH]

T_word16 G_objectCount

T_3dObjectRun G_objectRun[MAX_OBJECTS]

T_word16* G_remapSectorCeilingArray

T_word16* G_remapSectorFloorArray

T_sword32 G_screenObjectDistance[MAX_VIEW3D_WIDTH]

T_word16 G_screenObjectPosition[MAX_VIEW3D_WIDTH]

T_word16 G_segCount

T_byte8 G_squareRootTable

CalculateDistance determines the approximate distance between two coordinates.

Parameters

x1	– First X coordinate
y1	– First Y coordinate
x2	– Second X coordinate
y2	– Second Y coordinate

Returns: Approx. distance between too points.

CalculateEstimateDistance determines the quick and approximate distance between two points.

Parameters

x1	– First X coordinate
y1	– First Y coordinate
x2	– Second X coordinate
y2	– Second Y coordinate

Returns: Approx. distance between too points.

T_word32 G_textureAndX =63

T_word32 G_textureAndY =63

T_word16 G_textureShift =6

T_sword32 G_textureStepX

T_sword32 G_textureStepY

T_vertFloorInfo G_vertFloorInfo[MAX_FLOOR_INFO]

T_word16 G_vertFloorStarts[MAX_VIEW3D_WIDTH]

T_3dWall G_wall

T_word16 G_wallAttempt

T_word16 G_wallCount

T_word16 G_wallRunCount

T_3dWallSlice G_wallSlices[MAX_VIEW3D_WIDTH][MAX_WALL_SLICES_PER_COLUMN]

T_byte8* P_doubleBuffer

T_byte8 P_shadeIndex[16384]

When you need to draw a shaded bitmap, call this routine. It uses the standard (raw) format of bitmaps. It will blip it on the active screen with NO masking. (Sorry, black is black)

NOTE: No matter how much you want it to, this routine does NOT clip the bitmap at the edge on the screen and trying to will cause it to bomb.

Parameters

p_bitmap	– Pointer to a bitmap picture
x_left	– Position of the left
y_top	– Position of the top
shade	– Shading value (0-255, 0=black, 255=normal)

T_sword16 VIEW3D_CLIP_LEFT = 100

T_sword16 VIEW3D_CLIP_RIGHT = 200

T_sword16 VIEW3D_EVEN_HALF_HEIGHT = 70

T_sword16 VIEW3D_HALF_HEIGHT = 70

T_sword16 VIEW3D_HALF_WIDTH = 150

T_sword16 VIEW3D_HEIGHT = 140

T_sword16 VIEW3D_WIDTH = 300

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation