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Original Source for 1.13 Mod High Resolution version from 12/06/05
git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@21 3b4a5df2-a311-0410-b5c6-a8a6f20db521
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lalien
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#ifndef _LIGHTING_H_
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#define _LIGHTING_H_
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#include "Soldier Control.h"
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/****************************************************************************************
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* JA2 Lighting Module
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*
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* Tile-based, ray-casted lighting system.
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*
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* Lights are precalculated into linked lists containing offsets from 0,0, and a light
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* level to add at that tile. Lists are constructed by casting a ray from the origin of
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* the light, and each tile stopped at is stored as a node in the list. To draw the light
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* during runtime, you traverse the list, checking at each tile that it isn't of the type
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* that can obscure light. If it is, you keep traversing the list until you hit a node
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* with a marker LIGHT_NEW_RAY, which means you're back at the origin, and have skipped
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* the remainder of the last ray.
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*
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* Written by Derek Beland, April 14, 1997
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*
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***************************************************************************************/
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#define DISTANCE_SCALE 4
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#define LIGHT_DUSK_CUTOFF 8
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#define LIGHT_DECAY 0.9 // shade level decay per tile distance
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// lightlist node flags
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#define LIGHT_NODE_DRAWN 0x00000001 // light node duplicate marker
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#define LIGHT_ROOF_ONLY 0x00001000 // light only rooftops
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#define LIGHT_IGNORE_WALLS 0x00002000 // doesn't take walls into account
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#define LIGHT_BACKLIGHT 0x00004000 // light does not light objs, trees
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#define LIGHT_NEW_RAY 0x00008000 // start of new ray in linked list
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#define LIGHT_EVERYTHING 0x00010000 // light up everything
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#define LIGHT_FAKE 0x10000000 // "fake" light for display only
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// standard light file symbols
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#define LIGHT_OMNI_R1 "LTO1.LHT"
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#define LIGHT_OMNI_R2 "LTO2.LHT"
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#define LIGHT_OMNI_R3 "LTO3.LHT"
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#define LIGHT_OMNI_R4 "LTO4.LHT"
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#define LIGHT_OMNI_R5 "LTO5.LHT"
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#define LIGHT_OMNI_R6 "LTO6.LHT"
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#define LIGHT_OMNI_R7 "LTO7.LHT"
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#define LIGHT_OMNI_R8 "LTO8.LHT"
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#define MAX_LIGHT_TEMPLATES 32 // maximum number of light types
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#define MAX_LIGHT_SPRITES 256 // maximum number of light types
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#define SHADE_MIN 15 // DARKEST shade value
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#define SHADE_MAX 1 // LIGHTEST shade value
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// light sprite flags
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#define LIGHT_SPR_ACTIVE 0x0001
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#define LIGHT_SPR_ON 0x0002
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#define LIGHT_SPR_ANIMATE 0x0004
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#define LIGHT_SPR_ERASE 0x0008
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#define LIGHT_SPR_REDRAW 0x0010
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#define LIGHT_SPR_ONROOF 0x0020
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#define MERC_LIGHT 0x0040
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#define LIGHT_PRIMETIME 0x0080 // light turns goes on in evening, turns off at bedtime.
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#define LIGHT_NIGHTTIME 0x0100 // light stays on when dark outside
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#define COLOR_RED 162
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#define COLOR_BLUE 203
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#define COLOR_YELLOW 144
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#define COLOR_GREEN 184
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#define COLOR_LTGREY 134
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#define COLOR_DKGREY 136
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#define COLOR_BROWN 80
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#define COLOR_PURPLE 160
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#define COLOR_ORANGE 76
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#define COLOR_WHITE 208
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#define COLOR_BLACK 72
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// stucture of node in linked list for lights
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typedef struct light_p {
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INT16 iDX, iDY;
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UINT8 uiFlags;
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UINT8 ubLight;
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} LIGHT_NODE;
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// structure of light instance, or sprite (a copy of the template)
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typedef struct {
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INT16 iX, iY;
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INT16 iOldX, iOldY;
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INT16 iAnimSpeed;
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INT32 iTemplate;
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UINT32 uiFlags;
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UINT32 uiLightType;
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} LIGHT_SPRITE;
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// Initializes the lighting system
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BOOLEAN InitLightingSystem(void);
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// Shuts down, and frees up all lights/memory
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BOOLEAN ShutdownLightingSystem(void);
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// Resets all light sprites and deallocates templates
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BOOLEAN LightReset(void);
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// THIS MUST BE CALLED ONCE ALL SURFACE VIDEO OBJECTS HAVE BEEN LOADED!
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BOOLEAN SetDefaultWorldLightingColors(void);
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// Low-Level Template Interface
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// Sets the normal light level for all tiles in the world
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BOOLEAN LightSetBaseLevel(UINT8 iIntensity);
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// Adds a light value to all tiles
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BOOLEAN LightAddBaseLevel(UINT32 uiLightType, UINT8 iIntensity);
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// Subtracts a light value from all tiles
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BOOLEAN LightSubtractBaseLevel(UINT32 uiLightType, UINT8 iIntensity);
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// Creates an omni (circular) light
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INT32 LightCreateOmni( UINT8 ubIntensity, INT16 iRadius);
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// Creates an oval-shaped light (two separate radii)
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INT32 LightCreateElliptical(UINT8 ubIntensity, INT16 iRadius1, INT16 iRadius2);
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// Creates a square light
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INT32 LightCreateSquare(UINT8 ubIntensity, INT16 iRadius1, INT16 iRadius2);
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// Draws a light into the scene at X,Y
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BOOLEAN LightDraw(UINT32 uiLightType, INT32 iLight, INT16 iX, INT16 iY, UINT32 uiSprite);
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// Reverts the tiles a light has affected back to normal
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BOOLEAN LightErase(UINT32 uiLightType, INT32 iLight, INT16 iX, INT16 iY, UINT32 uiSprite);
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// Save a light list into a file
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BOOLEAN LightSave(INT32 uiLight, STR pFilename);
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// Load a light list from a file
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INT32 LightLoad(STR pFilename);
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// Sets the RGB values and number of light colors (1/2)
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BOOLEAN LightSetColors(SGPPaletteEntry *pPal, UINT8 ubNumColors);
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// Returns the number of colors active (1/2) and the palette colors
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UINT8 LightGetColors(SGPPaletteEntry *pPal);
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// High-Level Sprite Interface
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// Creates a new light sprite from a given filename/predefined symbol
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INT32 LightSpriteCreate(STR pName, UINT32 uiLightType);
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// Destroys the instance of that light
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BOOLEAN LightSpriteDestroy(INT32 iSprite);
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// Sets the tile position of the light instance
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BOOLEAN LightSpritePosition(INT32 iSprite, INT16 iX, INT16 iY);
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// Makes a light "fake"
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BOOLEAN LightSpriteFake(INT32 iSprite);
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// Updates any change in position in lights
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BOOLEAN LightSpriteRender();
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// Renders all lights
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BOOLEAN LightSpriteRenderAll(void);
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// Turns on/off power to a light
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BOOLEAN LightSpritePower(INT32 iSprite, BOOLEAN fOn);
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// Moves light to/from roof position
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BOOLEAN LightSpriteRoofStatus(INT32 iSprite, BOOLEAN fOnRoof);
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// Reveals translucent walls
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BOOLEAN CalcTranslucentWalls(INT16 iX, INT16 iY);
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BOOLEAN ApplyTranslucencyToWalls(INT16 iX, INT16 iY);
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// Makes trees translucent
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BOOLEAN LightTranslucentTrees(INT16 iX, INT16 iY);
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BOOLEAN LightHideTrees(INT16 iX, INT16 iY);
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BOOLEAN LightShowRays(INT16 iX, INT16 iY, BOOLEAN fReset);
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BOOLEAN LightHideRays(INT16 iX, INT16 iY);
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// makes the 16-bit palettes
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UINT16 CreateTilePaletteTables(HVOBJECT pObj, UINT32 uiType, BOOLEAN fForce );
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BOOLEAN CreateSoldierShadedPalette( SOLDIERTYPE *pSoldier, UINT32 uiBase, SGPPaletteEntry *pShadePal);
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UINT16 CreateSoldierPaletteTables(SOLDIERTYPE *pSoldier, UINT32 uiType);
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// returns the true light value at a tile (ignoring fake/merc lights)
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UINT8 LightTrueLevel( INT16 sGridNo, INT8 bLevel );
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// system variables
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extern LIGHT_NODE *pLightList[MAX_LIGHT_TEMPLATES];
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extern UINT16 usTemplateSize[MAX_LIGHT_TEMPLATES];
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extern UINT16 *pLightRayList[MAX_LIGHT_TEMPLATES];
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extern UINT16 usRaySize[MAX_LIGHT_TEMPLATES];
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extern INT16 LightHeight[MAX_LIGHT_TEMPLATES];
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extern INT16 LightWidth[MAX_LIGHT_TEMPLATES];
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extern INT16 LightXOffset[MAX_LIGHT_TEMPLATES];
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extern INT16 LightYOffset[MAX_LIGHT_TEMPLATES];
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extern INT16 LightMapLeft[MAX_LIGHT_TEMPLATES];
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extern INT16 LightMapTop[MAX_LIGHT_TEMPLATES];
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extern INT16 LightMapRight[MAX_LIGHT_TEMPLATES];
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extern INT16 LightMapBottom[MAX_LIGHT_TEMPLATES];
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extern STR pLightNames[MAX_LIGHT_TEMPLATES];
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// Sprite data
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extern LIGHT_SPRITE LightSprites[MAX_LIGHT_SPRITES];
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// Lighting system general data
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extern UINT8 ubAmbientLightLevel;
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extern UINT8 gubNumLightColors;
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// Lighting colors
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extern UINT8 gubNumLightColors;
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extern SGPPaletteEntry gpLightColors[3];
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// macros
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#define LightSpriteGetType(x) (LightSprites[x].uiLightType)
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#define LightSpriteGetTypeName(x) (pLightNames[LightSprites[x].iTemplate])
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#define LightGetAmbient() (ubAmbientLightLevel)
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#endif
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