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- /** ************************************************ ***
- *** ***
- *** Live Stream Of Me Working On This Code: ***
- *** ***
- *** ************************************************ ***
- twitch.com/kanjicoder
- STREAM_VIDEO_NAME:
- SDF_015: Voxel Engine SubVoxel(Pixel) Geometry
- *** ************************************************ ***
- *** ***
- *** EASY___SOURCE: tinyurl.com/SDF-015 ***
- *** DIRECT_SOURCE: pastebin.com/huJGZpJs ***
- *** ***
- *** EASY_____DEMO: tinyurl.com/SDF-015-DEMO ***
- *** DIRECT___DEMO: shadertoy.com/view/wdyfzw ***
- *** ***
- *** About: Voxel Engine Work. No new changes ***
- *** since SDF_014, just messed around with ***
- *** the hardcoded tilemap(voxelmap) data ***
- ** to see what kind of awesome stuff I ***
- *** could do with the code we fixed ***
- *** during SDF_014. ***
- *** ***
- *** ************************************************ **/
- //:MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM://
- /** M: Macros Section **/
- #define V_4 vec4
- #define V_3 vec3
- #define V_2 vec2
- #define F32 float
- #define I32 int
- #define U32 uint
- /** M: Macros Section **/
- //:MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM://
- //:DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD://
- /** D: Data Section **/
- //:DEBUGGING:====================================://
- V_4 THE_COLOR_OF_EMPTY_SPACE=V_4(
- 0.0 , 0.0 , 0.0 , 1.0
- /** RED GRE BLU ALP **/
- );
- //:====================================:DEBUGGING://
- //:CONFIGURATION:================================://
- //:CAMERA_SETTINGS:==========================://
- /** **************************************** ***
- PREFIX:
- OGP: OrthoGraphicProjection
- P3D: Perspective_3D
- T3O: TUBE360_OUT (TubeCam Looking OUTWARD)
- T3I: TUBE360_INN (TubeCam Looking INWARD )
- POSTFIX: (SUFFIX ):
- TOP: Top View
- 34D: 3/4 Tilted DOWN view.
- AAZ: Around_Axis_Z (NOT:WAZ)
- NOTES:
- T3O : commonly known as PANORAMIC 360
- TubeCam: Revolve Around Axis As Camera.
- Literally "Tube Camera"
- *** **************************************** **/
- #define OGP_TOP ( 1 ) /** Good For Debug **/
- #define OGP_34D ( 2 ) /** PATENT_DRAWING **/
- #define T3O_AAZ ( 3 ) /** Outward: Z-Axis**/
- #define T3I_AAZ ( 4 ) /** Inward : Z-Axis**/
- /** Selected Camera Type **/
- #define CAMTYPE ( OGP_34D )
- // #define CAMTYPE ( OGP_TOP )
- // #define CAMTYPE ( T3I_AAZ )
- //:==========================:CAMERA_SETTINGS://
- /** SLICE_RENDER_USING_CAMERA_PLANE **/
- int CFG_SLICE_RENDER=( 0 );
- //:================================:CONFIGURATION://
- //:RAYMARCHING_AND_VOXEL_CONSTANTS:==============://
- //:These defines are for ray marching when using
- //:fragment coordinates as our coordinate space.
- #define MAX_STE 1000 //:Max Step
- #define MIN_DIS 0.02 //:Min Dist (SurfaceDist)
- #define MAX_DIS (64.0*16.0 * 1.0) //:Max Dist
- //:Number of tiles on each axis:
- #define TILEMAP_PRESET ( 333 )
- #if( 847 == TILEMAP_PRESET ) /** 8 x 4 x 7 **/
- #define NTX 8 //: Number Of [tiles/voxels]
- #define NTY 4 //: Number Of [tiles/voxels]
- #define NTZ 7 //: Number Of [tiles/voxels]
- #endif
- #if( 111 == TILEMAP_PRESET )
- #define NTX 1 //: Number Of [tiles/voxels]
- #define NTY 1 //: Number Of [tiles/voxels]
- #define NTZ 1 //: Number Of [tiles/voxels]
- #endif
- #if( 222 == TILEMAP_PRESET )
- #define NTX 2 //: Number Of [tiles/voxels]
- #define NTY 2 //: Number Of [tiles/voxels]
- #define NTZ 2 //: Number Of [tiles/voxels]
- #endif
- #if( 333 == TILEMAP_PRESET )
- #define NTX 3 //: Number Of [tiles/voxels]
- #define NTY 3 //: Number Of [tiles/voxels]
- #define NTZ 3 //: Number Of [tiles/voxels]
- #endif
- #define VOXEL_SIZE_PRESET ( 161616 )
- #if( 161616 == VOXEL_SIZE_PRESET )
- //:Size_Of_A_Voxel_Tile_Measured_In_Pixels:
- #define NPX 16 //: NPX : Num_Pixels_X
- #define NPY 16 //: NPY : Num_Pixels_Y
- #define NPZ 16 //: NPZ : Num_Pixels_Z
- #endif
- #if( 555 == VOXEL_SIZE_PRESET )
- //:Size_Of_A_Voxel_Tile_Measured_In_Pixels:
- #define NPX 5 //: NPX : Num_Pixels_X
- #define NPY 5 //: NPY : Num_Pixels_Y
- #define NPZ 5 //: NPZ : Num_Pixels_Z
- #endif
- #if( 567 == VOXEL_SIZE_PRESET )
- //:Size_Of_A_Voxel_Tile_Measured_In_Pixels:
- #define NPX 5 //: NPX : Num_Pixels_X
- #define NPY 6 //: NPY : Num_Pixels_Y
- #define NPZ 7 //: NPZ : Num_Pixels_Z
- #endif
- #if( 579 == VOXEL_SIZE_PRESET )
- //:Size_Of_A_Voxel_Tile_Measured_In_Pixels:
- #define NPX 5 //: NPX : Num_Pixels_X
- #define NPY 7 //: NPY : Num_Pixels_Y
- #define NPZ 9 //: NPZ : Num_Pixels_Z
- #endif
- #if( 51015 == VOXEL_SIZE_PRESET )
- //:Size_Of_A_Voxel_Tile_Measured_In_Pixels:
- #define NPX 5 //: NPX : Num_Pixels_X
- #define NPY 10 //: NPY : Num_Pixels_Y
- #define NPZ 15 //: NPZ : Num_Pixels_Z
- #endif
- //:Total__number_of__Pixels__in_entire_voxel_map
- #define TPX ( NTX * NPX ) //: Total_Pixels_X
- #define TPY ( NTY * NPY ) //: Total_Pixels_Y
- #define TPZ ( NTZ * NPZ ) //: Total_Pixels_Z
- //: - ://
- #define _ U32( 0 )
- #define X U32( 1 )
- #define R U32( 0xFF0000ff ) //: PRIMARY
- #define r U32( 0x880000ff ) //: PRIMARY
- #define G U32( 0x00FF00ff ) //: PRIMARY
- #define g U32( 0x008800ff ) //: PRIMARY
- #define B U32( 0x0000FFff ) //: PRIMARY
- #define b U32( 0x000088ff ) //: PRIMARY
- //: - ://
- #define C U32( 0x00FFFFff ) //: SECONDARY
- #define c U32( 0x008888ff ) //: SECONDARY
- #define M U32( 0xFF00FFff ) //: SECONDARY
- #define m U32( 0x880088ff ) //: SECONDARY
- #define Y U32( 0xFFFF00ff ) //: SECONDARY
- #define y U32( 0x888800ff ) //: SECONDARY
- //: - ://
- #define L U32( 0x88FF00ff ) //: TERTIARY
- #define l U32( 0x448800ff ) //: TERTIARY
- #define O U32( 0xFF8800ff ) //: TERTIARY
- #define o U32( 0x884400ff ) //: TERTIARY
- //: - ://
- #define K U32( 0x212121ff ) //: BLACK | GRAY
- #define k U32( 0x323232ff ) //: BLACK | GRAY
- //: - ://
- #if( 1 == NTX && 1 == NTY && 1 == NTZ )
- U32
- VAT[ NTX * NTY * NTZ ]= U32[ 1 * 1 * 1 ](
- C /** <<<< JUST ONE TILE(VOXEL) **/
- );
- #endif
- #if( 2 == NTX && 2 == NTY && 2 == NTZ )
- U32
- VAT[ NTX * NTY * NTZ ]= U32[ 2 * 2 * 2 ](
- C,M,
- Y,_,
- c,m,
- y,_ //:<---NO_COMMA_LAST
- );
- #endif
- #if( 333 == TILEMAP_PRESET )
- #if( 3 == NTX && 3 == NTY && 3 == NTZ )
- U32
- VAT[ NTX * NTY * NTZ ]= U32[ 3 * 3 * 3 ](
- /** Something about the bounding **/
- /** calculations is definitely off **/
- R,R,R, //: <<< PROBLEM HERE
- R,_,R,
- R,R,R, //: <<< LOOKS GOOD
- G,_,G,
- _,_,_,
- G,_,G,
- B,B,B,
- B,_,B,
- B,B,B
- );
- #endif
- #endif
- #if( 8 == NTX && 4 == NTY && 7 == NTZ )
- U32
- VAT[ NTX * NTY * NTZ ]= U32[ 8 * 4 * 7 ](
- /** TODO: Eventually use an integer **/
- /** texture for this tilemap data. **/
- /** #STRATA_OF_2D_TILEMAPS# * * * **/
- /** #BACK_SLASH_COMMENT_FUCKERY# * * * **/
- //: 1 2 3 4 5 6 7 8
- _,_,_,_,_,_,_,_, //: 1 ---+
- _,_,_,_,_,_,_,_, //: 2 |__ Z == 0
- _,_,_,_,_,_,_,_, //: 3 |
- _,_,_,_,_,_,_,_, //: 4 ---+
- //: 1 2 3 4 5 6 7 8
- _,_,_,_,_,_,_,_, //: 1 ---+
- _,_,_,_,_,_,_,_, //: 2 |__ Z == 1
- _,_,_,_,_,_,_,_, //: 3 |
- _,_,_,_,_,_,_,_, //: 4 ---+
- //: 1 2 3 4 5 6 7 8
- _,_,_,_,_,R,_,_, //: 1 ---+
- _,_,_,_,Y,_,_,_, //: 2 |__ Z == 2
- _,_,_,M,_,_,_,_, //: 3 |
- _,_,C,_,_,_,_,_, //: 4 ---+
- //: 1 2 3 4 5 6 7 8
- _,_,_,_,_,_,_,_, //: 1 ---+
- _,_,_,_,_,_,_,_, //: 2 |__ Z == 3
- _,_,_,_,_,_,_,_, //: 3 |
- _,_,_,_,_,_,_,_, //: 4 ---+
- //: 1 2 3 4 5 6 7 8
- _,_,_,_,_,_,_,_, //: 1 ---+
- _,_,_,_,_,_,_,_, //: 2 |__ Z == 4
- _,_,_,_,_,_,_,_, //: 3 |
- _,_,_,_,_,_,_,_, //: 4 ---+
- //: 1 2 3 4 5 6 7 8
- _,_,_,_,_,_,_,_, //: 1 ---+
- _,_,_,_,_,_,_,_, //: 2 |__ Z == 5
- _,_,_,_,_,_,_,_, //: 3 |
- _,_,_,_,_,_,_,_, //: 4 ---+
- //: 1 2 3 4 5 6 7 8
- _,_,_,_,_,_,_,_,
- _,_,_,_,_,_,_,_,
- _,_,_,_,_,_,_,_,
- _,_,_,_,_,_,_,_ //:<<< NO_COMMA_ON_LAST
- );
- #endif /** [ 8 x 4 x 7 ] **/
- //: - ://
- #undef _
- #undef X
- #undef R
- #undef r
- #undef G
- #undef g
- #undef B
- #undef b
- //: -undef
- #undef C
- #undef c
- #undef M
- #undef m
- #undef Y
- #undef y
- //: -undef
- #undef L
- #undef l
- #undef O
- #undef o
- //: -undef
- #undef K
- #undef k
- //: - ://
- //:==============:RAYMARCHING_AND_VOXEL_CONSTANTS://
- //:STRUCTS:======================================://
- //:RWC_AND_RWN:------------------------------://
- struct RWC_AND_RWN{
- V_3 rwC ;
- V_3 rwN;
- };
- //:------------------------------:RWC_AND_RWN://
- //:VOX_000:----------------------------------://
- /** VOC: VOxel_Current(information) **/
- struct VOC{
- U32 has ; // voxel:exists? : 1 :
- U32 val ; // voxel:tile_value : 2 :
- // :---:
- I32 til_d3d; // voxel:1d_index : 3 :
- I32 t_x ; // voxel:tile_x : 4 :
- I32 t_y ; // voxel:tile_y : 5 :
- I32 t_z ; // voxel:tile_z : 6 :
- //
- I32 pix_d3d; // voxel:pixel_d : 7 :
- I32 p_x; // voxel:pixel_x : 8 :
- I32 p_y; // voxel:pixel_y : 9 :
- I32 p_z; // voxel:pixel_z :10 :
- };
- /** VOD: VOxel_Distance(information) **/
- struct VOD{
- F32 dis_nex; //:Distance_To_Next
- F32 dis_sur; //:Distance_To_Surface
- //:Within_Current_Voxel
- };
- struct VOE{
- F32 msg_err;
- };
- struct VOX_000{ /** var: vox_000 **/
- VOC voc; //:Voxel_Current_Info
- VOD vod; //:Voxel_Distance_Info
- VOE voe; //:Voxel_Error____Info
- };
- //:----------------------------------:VOX_000://
- //:VOX_MAR:----------------------------------://
- struct VOX_MAR{ //:SEE[ #VOX_MAR_ABOUT# ]
- uint exit;
- };
- //:----------------------------------:VOX_MAR://
- //:======================================:STRUCTS://
- /** D: Data Section **/
- //:DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD://
- //:IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII://
- /** I: Inifnite Degree Functions. Always At Top. **/
- //:NO_HALT_USE_ERROR_PIXEL:======================://
- //:PIX_ERR:======================================://
- #define ERR_001 1 /** msg_err #1 (0x101010)**/
- /** msg_err #1 (0x010101)**/
- #define ERR_002 2 /** msg_err #2 (0x202020)**/
- /** msg_err #2 (0x020202)**/
- #define ERR_003 3 /** msg_err #3 (0x303030)**/
- /** msg_err #3 (0x030303)**/
- V_4 PIX_ERR(
- int msg_err /** EX: MSG_ERR_001 **/
- , V_4 pix_err /** Previous Pixel Error **/
- , int o_k
- )
- {
- /** Muddy Pastel Yellow For When You **/
- /** forget to set the pix_err_out value. **/
- V_4 pix_err_out=V_4(0.5,0.5,0.2,1);
- float flux=( mod(iTime,1.0) );
- //:COLOR_PICKER_DEBUG_HEX:---------------://
- /** Make it easy to find source of error **/
- /** in code by using color picker on **/
- /** shader output and then doing a **/
- /** CTRL+F with that hex code to find **/
- /** the offending source code. **/
- F32 _ =F32( 0.0 );
- F32 MAX =F32( 255.0 ); // MaxIntensity
- F32 A =F32( 1.0 ); // Alpha_Max
- //:ERROR_CODE_STROBE_COLORS:---------://
- F32 _01_ =( F32(0x01) / MAX );
- F32 _10_ =( F32(0x10) / MAX );
- //
- F32 _02_ =( F32(0x02) / MAX );
- F32 _20_ =( F32(0x20) / MAX );
- //
- F32 _03_ =( F32(0x03) / MAX );
- F32 _30_ =( F32(0x30) / MAX );
- //
- F32 _04_ =( F32(0x04) / MAX );
- F32 _40_ =( F32(0x40) / MAX );
- //
- F32 _05_ =( F32(0x05) / MAX );
- F32 _50_ =( F32(0x50) / MAX );
- //
- F32 _06_ =( F32(0x06) / MAX );
- F32 _60_ =( F32(0x60) / MAX );
- //
- F32 _07_ =( F32(0x07) / MAX );
- F32 _70_ =( F32(0x70) / MAX );
- //
- F32 _08_ =( F32(0x08) / MAX );
- F32 _80_ =( F32(0x80) / MAX );
- //
- F32 _09_ =( F32(0x09) / MAX );
- F32 _90_ =( F32(0x90) / MAX );
- V_4 _0x010101_ = V_4(_01_,_01_,_01_, A);
- V_4 _0x101010_ = V_4(_10_,_10_,_10_, A);
- V_4 _0x020202_ = V_4(_02_,_02_,_02_, A);
- V_4 _0x202020_ = V_4(_20_,_20_,_20_, A);
- V_4 _0x030303_ = V_4(_03_,_03_,_03_, A);
- V_4 _0x303030_ = V_4(_30_,_30_,_30_, A);
- V_4 _0x040404_ = V_4(_04_,_04_,_04_, A);
- V_4 _0x404040_ = V_4(_40_,_40_,_40_, A);
- V_4 _0x050505_ = V_4(_05_,_05_,_05_, A);
- V_4 _0x505050_ = V_4(_50_,_50_,_50_, A);
- V_4 _0x060606_ = V_4(_06_,_06_,_06_, A);
- V_4 _0x606060_ = V_4(_60_,_60_,_60_, A);
- V_4 _0x070707_ = V_4(_07_,_07_,_07_, A);
- V_4 _0x707070_ = V_4(_70_,_70_,_70_, A);
- V_4 _0x080808_ = V_4(_08_,_08_,_08_, A);
- V_4 _0x808080_ = V_4(_80_,_80_,_80_, A);
- V_4 _0x090909_ = V_4(_09_,_09_,_09_, A);
- V_4 _0x909090_ = V_4(_90_,_90_,_90_, A);
- //:---------:ERROR_CODE_STROBE_COLORS://
- //:ERROR_ZERO_COLORS:----------------://
- #define F float
- #define V vec4
- /** If you forget to set error code, **/
- /** you will see flashing red and **/
- /** blue. ( _0xFF0666_ & _0x6660FF_ )**/
- F _FF_=( F32(0xFF) / MAX );
- // _06_=( F32(0x06) / MAX );
- // _60_=( F32(0x60) / MAX );
- F _66_=( F32(0x66) / MAX );
- V _0xFF0666_ =V_4(_FF_,_06_,_66_,A);
- V _0x6660FF_ =V_4(_66_,_60_,_FF_,A);
- #undef F
- #undef V
- //:----------------:ERROR_ZERO_COLORS://
- //:BAD_OK_ERROR_COLOR:---------------://
- #define F float
- #define V vec4
- /** You will see this if you init **/
- /** o_k to a value other than 1 in **/
- /** your source code. **/
- /** Strobes between orange and lime. **/
- /** ( _0xFF7700_ & _0x77FF00_ ) **/
- // _FF_=( F32(0xFF) / MAX );
- F _77_=( F32(0x77) / MAX );
- F _00_=( F32(0x00) / MAX );
- V _0xFF7700_ =V_4(_FF_,_77_,_00_,A);
- V _0x77FF00_ =V_4(_77_,_FF_,_00_,A);
- #undef F
- #undef V
- //:---------------:BAD_OK_ERROR_COLOR://
- //:---------------:COLOR_PICKER_DEBUG_HEX://
- if( o_k <= 0 ){
- pix_err_out = pix_err;
- }else
- if( 1 == o_k ){
- /** table of error "messages" #0 **/
- V_4 tab_err_000[10]=V_4[10](
- // 0: Invalid Error Code
- _0xFF0666_ // RED_FLASH
- // Odd Frame Error Colors:
- , _0x010101_ // ERR_001 : ODD_FRAME
- , _0x020202_ // ERR_002 : ODD_FRAME
- , _0x030303_ // ERR_003 : ODD_FRAME
- , _0x040404_ // ERR_004 : ODD_FRAME
- , _0x050505_ // ERR_005 : ODD_FRAME
- , _0x060606_ // ERR_006 : ODD_FRAME
- , _0x070707_ // ERR_007 : ODD_FRAME
- , _0x080808_ // ERR_008 : ODD_FRAME
- , _0x090909_ // ERR_009 : ODD_FRAME
- );;
- /** table of error "messages" #1 **/
- V_4 tab_err_001[10]=V_4[10](
- // 0: Invalid Error Code
- _0x6660FF_ // BLUE_FLASH
- // Even Frame Error Colors:
- , _0x101010_ // ERR_001 : EVE_FRAME
- , _0x202020_ // ERR_002 : EVE_FRAME
- , _0x303030_ // ERR_003 : EVE_FRAME
- , _0x404040_ // ERR_004 : EVE_FRAME
- , _0x505050_ // ERR_005 : EVE_FRAME
- , _0x606060_ // ERR_006 : EVE_FRAME
- , _0x707070_ // ERR_007 : EVE_FRAME
- , _0x808080_ // ERR_008 : EVE_FRAME
- , _0x909090_ // ERR_009 : EVE_FRAME
- );;
- if( mod(iTime*16.0,2.0) < 1.0 ){
- pix_err_out =( tab_err_000
- [ msg_err ] );;
- }else{
- pix_err_out =( tab_err_001
- [ msg_err ] );;
- };;
- }else{
- /** Orange strobe for an o_k value **/
- /** that is NOT expected. (o_k >= 2) **/
- if( mod(iTime*2.0,2.0) < 1.0 ){
- pix_err_out = _0xFF7700_; // ORANGE
- }else{
- pix_err_out = _0x77FF00_; // LIME
- };;
- };;
- return( pix_err_out );
- }
- //:======================================:PIX_ERR://
- //:======================:NO_HALT_USE_ERROR_PIXEL://
- //:MAX_OF_3:=====================================://
- F32
- max_003( F32 a , F32 b , F32 c )
- {
- return( max( max(a,b) , c ) );
- }
- //:=====================================:MAX_OF_3://
- /** I: Inifnite Degree Functions. Always At Top. **/
- //:IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII://
- //:22222222222222222222222222222222222222222222222222://
- //:INTERPOLATION_3D:=============================://
- //:sfd_i3d:======================================://
- V_3 sdf_i3d(
- /**/V_3 _1_
- , V_3 _2_
- , F32 f_p
- ){
- return( _1_ + ( ( _2_ - _1_ )*f_p ) );
- }
- //:=============================:INTERPOLATION_3D://
- //:======================================:sfd_i3d://
- //:FIRST_VOXEL_QUERY_NEEDED:=====================://
- //:@WHATVOX@
- // ############################# //
- #define T_X ( vox_000.voc.t_x )
- #define T_Y ( vox_000.voc.t_y )
- #define T_Z ( vox_000.voc.t_z )
- // ############################# //
- #define P_X ( vox_000.voc.p_x )
- #define P_Y ( vox_000.voc.p_y )
- #define P_Z ( vox_000.voc.p_z )
- #define P_I ( vox_000.voc.pix_d3d )
- // ############################# //
- /** rwN used to find distance to NEXT voxel. **/
- VOX_000
- GET_vox_000_USE_xyz_rwN(
- V_3 xyz
- , V_3 rwN
- )
- {
- VOX_000 vox_000;
- /** f: floor(xyz) values: **/
- F32 f_x = floor( xyz.x );
- F32 f_y = floor( xyz.y );
- F32 f_z = floor( xyz.z );
- //:CURRENT_VOXEL_CELL:-------------------://
- vox_000.voc.val = U32( 0 );
- T_X = ( int(floor( xyz.x / float( NPX ))));
- T_Y = ( int(floor( xyz.y / float( NPY ))));
- T_Z = ( int(floor( xyz.z / float( NPZ ))));
- //:-------------------:CURRENT_VOXEL_CELL://
- //:GET_VOXEL_CELL_VALUE:-----------------://
- /** Voxel Volume Is Hard Coded To have **/
- /** voxel__tile[0,0,0] stuck at world **/
- /** world_coord[0,0,0] **/
- if( T_X >= 0 && T_X < NTX
- && T_Y >= 0 && T_Y < NTY
- && T_Z >= 0 && T_Z < NTZ
- ){
- //: Index2D -and- Index3D
- int D2D = T_X + ( NTX * T_Y );
- int D3D = D2D + ( NTX * NTY * T_Z );
- vox_000.voc.til_d3d=( D3D );
- vox_000.voc.val =( VAT[ D3D ] );
- /** NOTE: Voxel value 0 will NOT get **/
- /** special treatment. It could**/
- /** contain geometry if we **/
- /** really wanted it to. **/
- vox_000.voc.has= U32( 1 );
- }else{
- /** Using a "has" flag so we **/
- /** can keep more logic UNSIGNED. **/
- /** (No need for negative value to ) **/
- /** (be used for invalid dex or val) **/
- vox_000.voc.til_d3d= int( 0 );
- vox_000.voc.val = U32( 0 );
- vox_000.voc.has = U32( 0 );
- };;
- //:-----------------:GET_VOXEL_CELL_VALUE://
- //:DIST_TO_NEXT_VOXEL:-------------------://
- /** ************************************ ***
- x_bound
- |||
- |||
- |||
- ====+-----+---[i]----+====== y_bound ====
- | | / ||
- | | / ||
- | | / ||
- | |/ ||
- +- - -P----------+|
- | . ||
- | . ||
- +-----+----------+|
- |||
- |||
- |||
- |||
- *** ************************************ **/
- #define P xyz /** Point **/
- #define N rwN /** Normal **/
- //:SIGNS_OF_RAY_VECTOR:--------------://
- /** We need to know if the ray is **/
- /** moving forwards to HIGHER tile **/
- /** values or BACKWARDS to LOWER **/
- /** tile values. **/
- /** SEE[ #CONSISTENT_VOXEL_COORDS# **/
- F32 b_x /** x_bound **/ ;
- F32 b_y /** y_bound **/ ;
- F32 b_z /** z_bound **/ ;
- /** **/ ;
- F32 x_0 /** x_bound : MIN **/ ;
- F32 y_0 /** y_bound : MIN **/ ;
- F32 z_0 /** z_bound : MIN **/ ;
- /** **/ ;
- F32 x_1 /** x_bound : MAX **/ ;
- F32 y_1 /** y_bound : MAX **/ ;
- F32 z_1 /** z_bound : MAX **/ ;
- ;
- x_1 =F32( ( T_X + 1 ) * NPX ) ;
- y_1 =F32( ( T_Y + 1 ) * NPY ) ;
- z_1 =F32( ( T_Z + 1 ) * NPZ ) ;
- ;
- /** #MINUS_EPSILON# **/
- //:.....................10........20
- //:...........0.12345678901234567890
- #define EPS_X ( 0.0001 ) /**#ITBIDKW#**/
- #define EPS_Y ( 0.0001 ) /**#ITBIDKW#**/
- #define EPS_Z ( 0.0001 ) /**#ITBIDKW#**/
- x_0 =F32( ( T_X - 0 ) * NPX ) -EPS_X ;
- y_0 =F32( ( T_Y - 0 ) * NPY ) -EPS_Y ;
- z_0 =F32( ( T_Z - 0 ) * NPZ ) -EPS_Z ;
- #undef EPS_X
- #undef EPS_Y
- #undef EPS_Z
- /** #MINUS_EPSILON# **/
- ;
- b_x = N.x >= 0.0 ? x_1 : x_0 ;
- b_y = N.y >= 0.0 ? y_1 : y_0 ;
- b_z = N.z >= 0.0 ? z_1 : z_0 ;
- //:--------------:SIGNS_OF_RAY_VECTOR://
- /** ******************************** ***
- SEE[ #NEXT_VOXEL_BOUNDING_VOLUME# ]
- The intersection point to next voxel
- (By using plane intersections) should
- not be further than ONE PIXEL away
- from the current voxel we are inside.
- +----------------+----------------+
- | +- - - - - -+ | +- - - - - -+ |
- | | | | | | |
- | | |
- | | | | | | |
- | | |
- | | | | | | |
- | +- - - - - -+ | +- - - - - -+ |
- +----------------+----------------+
- | +- - - - - -+ | +- - - - - -+ |
- | | | | | | |
- | | |
- | | CV | | | | |
- | (CurVoxel) | |
- | | | | | | |
- | +- - - - - -+ | +- - - - - -+ |
- +----------------+----------------+
- *** ******************************** **/
- /** ******************************** ***
- ___ == DONT CARE ABOUT
- P + (N * S )==[ b_x, ___ , ___ ]
- P.x + (N.x * S.x )== b_x
- (N.x * S.x )== b_x - P.x
- S.x == (b_x - P.x) / N.x
- *** ******************************** **/
- //:FIRST_PIXEL_OF_NEXT_VOXEL:--------://
- #define N_X ( 0.0 != N.x )
- #define N_Y ( 0.0 != N.y )
- #define N_Z ( 0.0 != N.z )
- //:Scalar for point normal form.
- //:F32 MAX_F32=intBitsToFloat(0x7f7fFFFF);
- //:F32 MAX_F32=F32( 2147483647 );
- F32 MAX_F32=F32( 1000 * 1000 );
- V_3 S = V_3(MAX_F32,MAX_F32,MAX_F32);
- //:V_3 S = V_3( 0,0,0 );
- /** [f_x,f_y,f_z] or [ P.x,P.y,P.z ]**/
- if( N_X ){ S.x = ( b_x - P.x ) / N.x; }; //:<<<<<<<<<<< THIS EQUATION MINUS BY floored or by P ?
- if( N_Y ){ S.y = ( b_y - P.y ) / N.y; };
- if( N_Z ){ S.z = ( b_z - P.z ) / N.z; };
- /** #TRAP_VALUE_MUST_BE_NEG_666# **/
- #define _666_ ( 0.0 - 666.0 )
- F32 shortest_scalar_distance=( _666_ );
- V_3 first_pixel_of_next_voxel;
- #undef _666_
- if( N_X && S.x <= S.y && S.x <= S.z ){
- shortest_scalar_distance=( S.x );
- }else
- if( N_Y && S.y <= S.x && S.y <= S.z ){
- shortest_scalar_distance=( S.y );
- }else
- if( N_Z && S.z <= S.x && S.z <= S.y ){
- shortest_scalar_distance=( S.z );
- };;
- /** Not using this anywhere, BUT KEEP**/
- /** for now. Now is not the time **/
- /** to optimize. **/
- first_pixel_of_next_voxel=(
- //: P + ( N * [ S.x | S.y | S.z ] )
- P + ( N * shortest_scalar_distance )
- );;
- vox_000.vod.dis_nex=(
- shortest_scalar_distance );;
- //:vox_000.vod.dis_nex=( 8.0 );
- #undef N_X
- #undef N_Y
- #undef N_Z
- //:--------:FIRST_PIXEL_OF_NEXT_VOXEL://
- #undef P /** Point **/
- #undef N /** Normal **/
- //:-------------------:DIST_TO_NEXT_VOXEL://
- //:GET_VOXEL_PIXEL:----------------------://
- if( vox_000.voc.has >= U32(1) ){ //:-----://
- /** If you are inside a voxel, than **/
- /** you by definition MUST be at a **/
- /** certain pixel within that voxel. **/
- P_X = I32( f_x ) - (T_X * NPX);
- P_Y = I32( f_y ) - (T_Y * NPY);
- P_Z = I32( f_z ) - (T_Z * NPZ);
- /** ******************************** ***
- This is why we should FLOOR xyz
- values when figuring out what
- Tile(voxel) or Pixel(VoxelSubCell)
- we are inside of.
- |<- 0 ->|<- 1 ->| <-- DISCREET_MODEL
- +---+---+---+---+
- | . | . |
- + - + - + - + - +
- | . | . |
- +---+---+---+---+
- ^ ^
- | |
- 0 1 <---------- FRACTIONAL_MODEL
- *** ******************************** **/
- //: Index2D -and- Index3D
- int D2D = P_X + ( NPX * P_Y );
- int D3D = D2D + ( NPX * NPY * P_Z );
- P_I = ( D3D /** inDEX_3D **/ );
- };; //:------------------:GET_VOXEL_PIXEL://
- return( vox_000 );
- } // <<<<<<<<<<<<<{ GET_vox_000_USE_xyz_rwN } //
- // ---------------------------------------------- //
- #undef T_X // ( vox_000.voc.t_x ) // --------- //
- #undef T_Y // ( vox_000.voc.t_y ) // --------- //
- #undef T_Z // ( vox_000.voc.t_z ) // --------- //
- // ---------------------------------------------- //
- #undef P_X // ( vox_000.voc.p_x ) // ----- //
- #undef P_Y // ( vox_000.voc.p_y ) // ----- //
- #undef P_Z // ( vox_000.voc.p_z ) // ----- //
- #undef P_I // ( vox_000.voc.pix_d3d ) // ----- //
- //:=====================:FIRST_VOXEL_QUERY_NEEDED://
- //:MARCH_INTO_VOXEL:=============================://
- VOX_MAR sdf_MarchIntoVoxel(
- VOX_000 vox_000
- , V_3 xyz
- , V_3 rwN
- )
- {
- VOX_MAR vox_mar;
- vox_mar.exit=U32( 1 );
- return( vox_mar );
- }
- //:=============================:MARCH_INTO_VOXEL://
- #define F float
- #define U uint
- #define _FF_ uint( 0xFF )
- V_4 u32_CTO_c4d(
- U32 u32
- ){
- V_4
- c4d = V_4( /** c4d:Color_4_Dimensional **/
- F( ( u32 >> U(24) ) & _FF_ ) / 255.0
- , F( ( u32 >> U(16) ) & _FF_ ) / 255.0
- , F( ( u32 >> U( 8) ) & _FF_ ) / 255.0
- , F( ( u32 >> U( 0) ) & _FF_ ) / 255.0
- );;
- return( c4d );
- }
- #undef F
- #undef U
- #undef _FF_
- //:INTEGER_MODULO:===============================://
- #ifndef I32
- #define I32 int
- #endif
- #ifndef F32
- #define F32 float
- #endif
- /** PRIVATE: Called only by I32_MOD **/
- I32 i32_mod_neg( I32 neg_a , I32 pos_d ){
- /** ************************************ ***
- Function Calculates:
- FIXED: (d-1)-[ mod(abs(a)+1 , d) ]
- GOAL: Negatives keep exact same tiling
- pattern as the positives.
- IN : -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6
- OUT: 2 3 0 1 2 3 0 1 2 3 0 1 2
- 0123 -> 0123 -> 0123 -> 0123 -> 0123 -> ect
- *** ************************************ **/
- I32 pos_a = ( 0 - neg_a ) + 1;
- F32 A = F32( pos_a );
- F32 D = F32( pos_d );
- //: GLSL_MODULUS_WITH_INTEGERS_FORMULA
- //: WARD:Wholepart,All,Remainder,Divisor
- int W = int( trunc( A / ( D )) );
- int R = int( A - ( F32(W) * D ) );
- return( (pos_d-1) - R );
- }
- I32
- I32_MOD(
- /**/I32 a /** ALL : CAN BE NEGATIVE **/
- , I32 d /** DIVISOR : ALWAYS POSITIVE **/
- ){
- /** ************************************ ***
- Allow for I32_MOD to be used for wrapping
- even when the input to wrap[ a ] goes
- negative. d should always be positive.
- EX: mod( x , 2 ) , where x == -1
- | -1 | 0 [ 1 ] 2 |
- | 1 | 0 [ 1 ] 0 | 1 | 0 |
- d + 1 == 2 + (-1) == 1
- *** ************************************ **/
- int R;
- if( a < 0 ){
- //:This is CLOSE but then new problem
- //:of lots of green checkers is showing
- //:up. No clue...
- R = i32_mod_neg( a , d );
- }else{
- F32 A = F32( a );
- F32 D = F32( d );
- //:<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<FIX_THE_OVERFLOW_BELOW
- //: GLSL_MODULUS_WITH_INTEGERS_FORMULA
- //: WARD:Wholepart,All,Remainder,Divisor
- int W = int( trunc( A / ( D )) );
- R = int( A - ( F32(W) * D ) );
- };;
- return( R );
- }
- //:===============================:INTEGER_MODULO://
- //:MAX_OF_3_NAMED_BY_USE_CASE:===================://
- #define F float
- #define M max
- F32
- GET_npm_USE_npx_npy_npz(
- I32 npx /** I32 so we don't **/
- , I32 npy /** need to CAST when**/
- , I32 npz /** calling this. **/
- ){ /** ACTUALLY U32 vals**/
- //: npm: Number_of_Pixels_Max(x,y,z)
- F32 npm = M( M( F(NPX),F(NPY) ),F(NPZ) );
- return( npm );
- }
- #undef F
- #undef M
- //:===================:MAX_OF_3_NAMED_BY_USE_CASE://
- //:VOXEL_TO_DEBUG_COLOR:=========================://
- /** @VOXBUGCOLOR@ **/
- #define P_X ((( vox_000.voc.p_x )))
- #define P_Y ((( vox_000.voc.p_y )))
- #define P_Z ((( vox_000.voc.p_z )))
- #define ALP ( 1.0 )
- V_4 vox_000_CTO_c4d(
- VOX_000 vox_000
- )
- {
- V_4 c4d; /** [output/return/result] **/
- /** base color **/
- V_4 b_c=( u32_CTO_c4d( vox_000.voc.val ));
- #define F float
- F d_x = min( F(P_X) , F( NPX - P_X - 1 ));
- F d_y = min( F(P_Y) , F( NPY - P_Y - 1 ));
- F d_z = min( F(P_Z) , F( NPZ - P_Z - 1 ));
- #undef F
- F32 m2d ; /** m2d: Minimum 2D **/
- if( d_x <= d_y && d_x <= d_z ){
- /** d_x == X_PLANE == [ y , z ] **/
- m2d = min( d_y , d_z );
- //: c4d =V_4( 1,0,0, ALP );
- }else
- if( d_y <= d_x && d_y <= d_z ){
- /** d_y == Y_PLANE == [ x , z ] **/
- m2d = min( d_x , d_z );
- //: c4d =V_4( 0,1,0, ALP );
- }else
- if( d_z <= d_x && d_z <= d_y ){
- /** d_z == Z_PLANE == [ x , y ] **/
- m2d = min( d_x , d_y );
- //: c4d =V_4( 0,0,1, ALP );
- }else{
- /** This should never execute **/
- };;
- #define F float
- F32 n_p = max_003( F(NPX),F(NPY),F(NPZ) );
- F32 per =( m2d*2.0 ) / n_p ;
- #undef F
- if( per > 0.0 ){
- c4d =V_4(
- b_c.x * per
- , b_c.y * per
- , b_c.z * per
- , b_c.w * 1.0
- );;
- }else{
- #define X d_x
- #define Y d_y
- #define Z d_z
- /** #VOXEL_EDGE_COLOR# **/
- /** #NO_ELSE_FOR_EDGE_COLORING# **/
- F32 R=( 0.0 );
- F32 G=( 0.0 );
- F32 B=( 0.0 );
- if( X <= Y && X <= Z ){ /** X_PLANE **/
- R =( 1.0 );
- };; /** NO ELSE! **/
- if( Y <= X && Y <= Z ){ /** Y_PLANE **/
- G =( 1.0 );
- };; /** NO ELSE! **/
- if( Z <= X && Z <= Y ){ /** Z_PLANE **/
- B =( 1.0 );
- };; /** NO ELSE! **/
- c4d =V_4( R,G,B, ALP );
- #undef X
- #undef Y
- #undef Z
- };;
- return( c4d );
- }
- #undef P_X
- #undef P_Y
- #undef P_Z
- #undef ALP
- //:=========================:VOXEL_TO_DEBUG_COLOR://
- //:22222222222222222222222222222222222222222222222222://
- //:11111111111111111111111111111111111111111111111111://
- //:FRAGCOORD_TO_FRAGPERCENT:=====================://
- //:f_c_CTO_f_p:==================================://
- V_2 f_c_CTO_f_p( V_2 f_c ){
- V_2 f_p;
- f_p = f_c / ( iResolution.xy - 1.0 );
- return( f_p );
- }
- //:==================================:f_c_CTO_f_p://
- //:=====================:FRAGCOORD_TO_FRAGPERCENT://
- //:FRAGPER_TO_CAMERA_RAY:========================://
- //:f_p_CTO_rwC_AND_rwN_CAMTYPE_OGP_TOP:==========://
- RWC_AND_RWN
- f_p_CTO_rwC_AND_rwN_CAMTYPE_OGP_TOP(
- V_2 f_p /** 2 dimensional percentage **/
- )
- {
- F32 bug = ( F32(NPZ) * 4.0 ); //:DEBUG_ONLY
- F32 spd =( 0.5 /**SPEED FACTOR **/ );
- F32 pos_cos =( cos(iTime*spd)+1.0 ) / 2.0;
- F32 neg_cos =( cos(iTime*spd)-1.0 ) / 2.0;
- bug=bug*pos_cos;
- //:bug = ( (-16.1) * bug );
- //:bug = ( -1036.8 );
- //:bug=( -32.2 );
- /** ************************************ ***
- TODO: Fix bug...
- bug=( - 0.2 ); <<<<< OK
- bug=( - 16.2 ); <<<<< OK
- bug=( - 32.2 ); <<<<< ERR
- bug=( - 48.2 ); <<<<< OK
- bug=( - 64.2 ); <<<<< ERR
- bug=( - 80.2 ); <<<<< OK
- bug=( - 96.2 ); <<<<< ERR
- bug=( - 112.2 ); <<<<< OK
- bug=( - 128.2 ); <<<<< ERR
- bug=( -1036.8 );
- *** ************************************ **/
- V_3 rwC; //:ray_word__COORDINATE
- V_3 rwN; //:ray_world_NORMAL____
- //:#FIND_POINT_ON_SCREEN_PLANE#
- F32 H = F32( 0 - 9 );; //:Cam Height Pos
- F32 X = iResolution.x - 1.0;
- F32 Y = iResolution.y - 1.0;
- /** ************************************ ***
- A_B
- A----|------B
- | | |
- | rwC |
- | | |
- C----|------D
- C_D
- *** ************************************ **/
- F32 _ =F32( 0.0 /**ALWAYS_ZERO **/ );
- F32 XOS=F32( 0 );
- F32 YOS=F32( 0 );
- F32 ZOS=F32( 0 );
- V_3 _A_ = V_3( _+XOS,_+YOS, bug+H+ZOS );
- V_3 _B_ = V_3( X+XOS,_+YOS, bug+H+ZOS );
- V_3 _C_ = V_3( _+XOS,Y+YOS, bug+H+ZOS );
- V_3 _D_ = V_3( X+XOS,Y+YOS, bug+H+ZOS );
- V_3 A_B = sdf_i3d( _A_ , _B_ , f_p.x );
- V_3 C_D = sdf_i3d( _C_ , _D_ , f_p.x );
- rwC = sdf_i3d( A_B , C_D , f_p.y );
- //:#POSITIVE_Z_DIVES_INTO_SCREEN#://
- rwN = normalize( V_3( 0 , 0 , 1 ) );
- RWC_AND_RWN
- rwC_AND_rwN;
- rwC_AND_rwN.rwC = rwC;
- rwC_AND_rwN.rwN = rwN;
- return( rwC_AND_rwN );
- }
- //:==========:f_p_CTO_rwC_AND_rwN_CAMTYPE_OGP_TOP://
- //:f_p_CTO_rwC_AND_rwN_CAMTYPE_OGP_34D:==========://
- #define _0_ (0.0)
- #define _ (0.0)
- RWC_AND_RWN
- f_p_CTO_rwC_AND_rwN_CAMTYPE_OGP_34D(
- V_2 f_p /** 2 dimensional percentage **/
- )
- {
- RWC_AND_RWN /** OUTPUT_OBJECT **/
- rwC_AND_rwN; /** OUTPUT_OBJECT **/
- V_3 rwC; //:ray_word__COORDINATE
- V_3 rwN; //:ray_world_NORMAL____
- //:#FIND_POINT_ON_SCREEN_PLANE#
- /** ************************************ ***
- Could possibly use these as slice planes.
- But for now using these to navigate our
- voxel map bounds.
- [ A ]Is_Directly_Above[ E ]On_Z_Axis
- [ B ]Is_Directly_Above[ F ]On_Z_Axis
- [ C ]Is_Directly_Above[ G ]On_Z_Axis
- [ D ]Is_Directly_Above[ H ]On_Z_Axis
- (In World/Frag Coords)
- [0,0,0]
- \
- A_B \
- A----|------B A --> +=======+ <-- B
- | | | /. .\
- | rwC_001 | / . . \
- | | | / . . \
- C----|------D C->+===============+<-D
- C_D [ ._....._. ]
- [ / \ ]
- [ . . ]
- [/ \]
- +===============+<-H
- +===============+
- [\ /]
- [ . . ]
- [ \_......._/ ]
- E_F [ . . ]
- E----|------F G->+===============+<-H
- | | | \ . . /
- | rwC_002 | \ . . /
- | | | \. ./
- G----|------H E --> +=======+ <-- F
- G_H
- *** ************************************ **/
- //:Dimensions Of Voxel Volume:
- //:As maximum indexes.
- F32 M_X =( F32(TPX) - 1.0 );
- F32 M_Y =( F32(TPY) - 1.0 );
- F32 M_Z =( F32(TPZ) - 1.0 );
- //:TOP LAYER OF PIXELS OF VOXEL VOLUME:
- //:(INCLUSIVE MATH. We are inside the)
- //:(first layer of pixels of the first)
- //:(layer of voxels)
- V_3 _A_ = V_3( _-_ , _-_ , _-_ );
- V_3 _B_ = V_3( M_X , _-_ , _-_ );
- V_3 _C_ = V_3( _-_ , M_Y , _-_ );
- V_3 _D_ = V_3( M_X , M_Y , _-_ );
- //:BOTTOM LAYER OF PIXELS OF VOXEL VOLUME
- //:(Incluseive Math. We are inside the )
- //:(last layer of pixels of the last )
- //:(layer of voxels. )
- V_3 _E_ = V_3( _-_ , _-_ , M_Z );
- V_3 _F_ = V_3( M_X , _-_ , M_Z );
- V_3 _G_ = V_3( _-_ , M_Y , M_Z );
- V_3 _H_ = V_3( M_X , M_Y , M_Z );
- /** ************************************ ***
- Take our plane and pretend it is
- the top of a cube that we want to
- get plane in an isometric position to.
- Where the new plane tangents corner _D_
- A------_B_ vec_D_B
- /| \\ \
- / | |\\ \
- / | | \\ vec_D_C <---D
- _C_============_D_ ^
- | |_ _ _ _| || |
- | /E F\ || vec_H_D
- | / \||
- |/ || Corner_Vector:
- G-------------_H_
- *** *** * * * * * * **** * * * * * * *** **/
- /** Edge Vectors **/
- V_3 vec_C_D = normalize( _D_ - _C_ );
- V_3 vec_D_C = normalize( _C_ - _D_ );
- V_3 vec_D_B = normalize( _B_ - _D_ );
- V_3 vec_H_D = normalize( _D_ - _H_ );
- V_3 vec_D_H = normalize( _H_ - _D_ );
- /** *** * * * * * * **** * * * * * * *** ***
- Use Corner_Vector to calculate a 3/4
- perspective plane that tangents _D_.
- *** ************************************ **/
- /** ************************************ ***
- X axis vector is pretty easy because the
- camera X axis does not move in the Z
- direction.
- ^ /
- | / ^
- A-------B / | a_x Is Average
- | | / |
- | | / vec_D_B
- C-------D--> vec_C_D ----->
- /
- /
- /<-- goal is THIS line for X-axis.(a_x)
- /
- *** *** * * * * * * **** * * * * * * *** **/
- #define _X_ vec_C_D
- #define _Y_ vec_D_B
- V_3 a_x =normalize(
- /** 45 degree line on XY plane **/
- ( _X_ + _Y_ ) / 2.0
- );;
- #undef _X_
- #undef _Y_
- /** *** * * * * * * **** * * * * * * *** ***
- Y axis vector is a bit tricky because it
- moves on all axis(es). XYZ.
- +--B If we average vec_D_C & vec_D_B
- |\ | To get a 45 degree on the XY plane,
- | \| we can then tilt that vector up
- C--D by 45 degrees by averaging it
- | with vec_H_D
- |
- H
- *** ************************************ **/
- //: a_y: Axis_Y
- #define _X_ vec_D_C
- #define _Y_ vec_D_B
- #define _Z_ vec_H_D
- V_3 a_y =normalize(
- (
- normalize( (_X_ + _Y_)/2.0 )
- + ( _Z_ )
- ) /2.0
- );;
- #undef _X_
- #undef _Y_
- #undef _Z_
- /** Looking into the voxel volume from **/
- /** a 3/4 isometric direction. **/
- V_3 a_z = normalize(
- ( vec_D_C + vec_D_B + vec_D_H ) / 3.0
- );;
- /** ************************************ ***
- We can now use point-normal form to
- build our camera polygon. We will start
- from point _D_ and walk HALFWAY the
- WIDTH in both directions on our altered
- x-axis vector( a_x ) and HALFWAY the
- HEIGHT in both directions on our altered
- y-axis vector( a_y ).
- HEIGHT: The height of our camera plane.
- WIDTH: The width of our camera plane.
- P_X +---+
- +------+------+ | |
- | | | +---+---+
- N_Y +---- _D_ ----+ P_Y |_D_|
- | | | +---+---+
- +------+------+ | |#DIA_CAMCENTER#
- N_X +---+
- #CAMCENTER#:
- In order for the camera to be 100%
- centered, it may be necessary to
- squash or stretch the camera by 1
- pixel IF the camera is NOT an odd
- number of pixels on that axis.
- SEE_DIAGRAM[ #DIA_CAMCENTER# ]
- +0 +1 +2 +2.5 +0 +1 +2 +3
- [D] [+] || [+]
- [ ][ ][ ][ ][ ] [ ][ ][ ][ ][ ][ ]
- |<---- 5 ---->| |<------ 6 ----->|
- *** ************************************ **/
- #define ZOOMED_IN_CAMERA_2020_11_26 ( 1 )
- float H_W ; //:H_W:Halfway_Width
- float H_H ; //:H_H:Halfway_Height
- if( ZOOMED_IN_CAMERA_2020_11_26 >= 1 ){
- F32 npm = GET_npm_USE_npx_npy_npz(
- NPX,NPY,NPZ);;
- /** Display Size Of A Single Voxel **/
- /** In Terms Of PIXELS/FRAGS **/
- F32 zoo_mul =( 128.0 );
- F32 zoo_div =( zoo_mul / npm );
- /** Camera surface smaller than **/
- /** client viewport means zoomed in **/
- //: H_W = ( F32(TPX) / 2.0 );
- //: H_H = ( F32(TPY) / 2.0 );
- H_W = ( iResolution.x / 2.0 );
- H_H = ( iResolution.y / 2.0 );
- H_W = ( H_W / zoo_div );
- H_H = ( H_H / zoo_div );
- }else
- if( ZOOMED_IN_CAMERA_2020_11_26 <= 0 ){
- /** Camera surface exactly same size **/
- /** as client viewport means no zoom.**/
- H_W = ( iResolution.x / 2.0 );
- H_H = ( iResolution.y / 2.0 );
- };;
- #undef ZOOMED_IN_CAMERA_2020_11_26
- /** To be pixel-perfect, floor and ceil **/
- /** need to be used. This is an OCD **/
- /** optimization that can probably **/
- /** be removed without noticable **/
- /** difference in the result. **/
- //- P_X = floor( _D_ + ( a_x * H_W ) ); -//
- //- N_X = ceil( _D_ - ( a_x * H_W ) ); -//
- //- P_Y = floor( _D_ + ( a_y * H_H ) ); -//
- //- N_Y = ceil( _D_ - ( a_y * H_H ) ); -//
- //+ We can't do it this way, because the +//
- //+ plane is not aligned with our native +//
- //+ XYZ axis. +//
- //+ What I mean is we can't get the top +//
- //+ left corner by saying: +//
- //+ vec3( N_Y.x , P_X.y , _D_.z ) +//
- /** ************************************ ***
- RASTER_GRAPHICS_STYLE_TOP_LEFT_ORIGIN
- \
- +----------- +X ------------>
- |
- | _I_ _J_
- | \ P_X /
- | +------+------+ ^
- | | | | |
- +Y N_Y +---- _D_ ----+ P_Y [ -y ]
- | | | | |
- | +------+------+ |
- | / N_X \ |
- V _K_ _L_ |
- |
- <---------[ -x ]------------+
- *** *** * * * * * * **** * * * * * * *** **/
- V_3 _I_ = _D_ - ( a_x * H_W )
- - ( a_y * H_H ) ;;
- V_3 _J_ = _D_ + ( a_x * H_W )
- - ( a_y * H_H ) ;;
- V_3 _K_ = _D_ - ( a_x * H_W )
- + ( a_y * H_H ) ;;
- V_3 _L_ = _D_ + ( a_x * H_W )
- + ( a_y * H_H ) ;;
- /** ************************************ **/
- #define USE_ANIMATED_DOLLY_FOR_DEBUG ( 1 )
- if( USE_ANIMATED_DOLLY_FOR_DEBUG >= 1 ){
- F32 max_dolly =max(
- F32(TPX)
- ,
- max(
- F32(TPY)
- ,
- F32(TPZ)
- )
- );;
- F32 spd=( iTime*0.10 ); /**spd==SPEED**/
- F32 pos_cos=( (cos( spd )/2.0)+0.5 );
- F32 neg_cos=( (cos( spd )/2.0)-0.5 );
- F32 dolly_amount =(
- pos_cos * max_dolly
- );;
- _I_ += ( a_z * dolly_amount );
- _J_ += ( a_z * dolly_amount );
- _K_ += ( a_z * dolly_amount );
- _L_ += ( a_z * dolly_amount );
- };;
- #undef USE_ANIMATED_DOLLY_FOR_DEBUG
- V_3 I_J = sdf_i3d( _I_ , _J_ , f_p.x );
- V_3 K_L = sdf_i3d( _K_ , _L_ , f_p.x );
- rwC = sdf_i3d( I_J , K_L , f_p.y );
- //:#POSITIVE_Z_DIVES_INTO_SCREEN#://
- rwN = normalize( a_z );
- rwC_AND_rwN.rwC = rwC;
- rwC_AND_rwN.rwN = rwN;
- return( rwC_AND_rwN );
- }
- #undef _0_
- #undef _
- //:==========:f_p_CTO_rwC_AND_rwN_CAMTYPE_OGP_34D://
- //:f_p_CTO_rwC_AND_rwN_CAMTYPE_T3O_AAZ:==========://
- RWC_AND_RWN
- f_p_CTO_rwC_AND_rwN_CAMTYPE_T3O_AAZ(
- V_2 f_p /** 2 dimensional percentage **/
- )
- {
- RWC_AND_RWN
- rwC_and_rwN;
- //:TODO: Logic.
- return( rwC_and_rwN );
- }
- //:==========:f_p_CTO_rwC_AND_rwN_CAMTYPE_T3O_AAZ://
- //:f_p_CTO_rwC_AND_rwN_CAMTYPE_T3I_AAZ:==========://
- /** TAGS[ t3i_aaz : t3i:aaz ] **/
- #define RWC rwC_and_rwN.rwC
- #define RWN rwC_and_rwN.rwN
- RWC_AND_RWN
- f_p_CTO_rwC_AND_rwN_CAMTYPE_T3I_AAZ(
- V_2 f_p /** 2 dimensional percentage **/
- )
- {
- RWC_AND_RWN
- rwC_and_rwN;
- F32 pos_cos=(cos(iTime)+1.0) / 2.0 ;
- #define F float
- #define M max
- F32 N_T = M( M( F(NTX),F(NTY) ),F(NTZ) );
- F32 N_P = M( M( F(NPX),F(NPY) ),F(NPZ) );
- F32 rad =( N_T * N_P ) * 2.0 * pos_cos;
- #undef F
- #undef M
- //: 123456789
- F32 PI2 = ( 3.141592653 * 2.0 );
- F32 hig = ( 400.0 ); //:Cylinder Height.
- F32 pop = f_p.x ; //: Percent_On_Path
- V_2 c_n ; //: Circle_Normal
- F32 ang = pop * PI2 ; //: Angle
- RWC.x = c_n.x = (0.0+rad) +cos(ang)*rad;
- RWC.y = c_n.y = (0.0+rad) +sin(ang)*rad;
- RWC.z = hig * f_p.y ;
- RWN.x = 0.0 - c_n.x;
- RWN.y = 0.0 - c_n.y;
- RWN.z = 0.0; //:Perpendicular To Z axis.
- return( rwC_and_rwN );
- }
- #undef RWC
- #undef RWN
- //:==========:f_p_CTO_rwC_AND_rwN_CAMTYPE_T3I_AAZ://
- //:f_p_CTO_rwC_AND_rwN:==========================://
- #define ogp_top f_p_CTO_rwC_AND_rwN_CAMTYPE_OGP_TOP
- #define ogp_34d f_p_CTO_rwC_AND_rwN_CAMTYPE_OGP_34D
- #define t3o_aaz f_p_CTO_rwC_AND_rwN_CAMTYPE_T3O_AAZ
- #define t3i_aaz f_p_CTO_rwC_AND_rwN_CAMTYPE_T3I_AAZ
- RWC_AND_RWN
- f_p_CTO_rwC_AND_rwN(
- V_2 f_p /** 2 dimensional percentage **/
- )
- {
- RWC_AND_RWN
- rwC_and_rwN;
- switch( CAMTYPE ){
- case OGP_TOP :
- rwC_and_rwN = ogp_top( f_p ); break;
- case OGP_34D :
- rwC_and_rwN = ogp_34d( f_p ); break;
- case T3O_AAZ :
- rwC_and_rwN = t3o_aaz( f_p ); break;
- case T3I_AAZ :
- rwC_and_rwN = t3i_aaz( f_p ); break;
- default : /** OGP_TOP **/
- rwC_and_rwN = ogp_top( f_p ); break;
- };;
- return( rwC_and_rwN );
- }
- #undef ogp_top
- #undef ogp_34d
- #undef t3o_aaz
- #undef t3i_aaz
- //:==========================:f_p_CTO_rwC_AND_rwN://
- //:========================:FRAGPER_TO_CAMERA_RAY://
- //:RENDER_SCENE:=================================://
- //:sdf_RenderScene:==============================://
- #define T_X vox_000.voc.t_x
- #define T_Y vox_000.voc.t_y
- #define T_Z vox_000.voc.t_z
- #define HAS vox_000.voc.has
- #define VAL vox_000.voc.val
- #define D_N vox_000.vod.dis_nex
- V_4 sdf_RenderScene( RWC_AND_RWN rwC_AND_rwN )
- {
- I32 o_k = I32( 1 );
- V_4 c4d = THE_COLOR_OF_EMPTY_SPACE ;
- V_3 rwN = rwC_AND_rwN.rwN;
- V_3 rwC = rwC_AND_rwN.rwC;
- V_3 xyz = rwC;
- F32 xyz_TDF_rwC=(0.0);
- /** xyz_total_distance_from_rwC **/
- VOX_000
- vox_000;
- VOX_MAR vox_mar;
- //:dis_nex: Distance To NEXT voxel.
- //:dis_sur: Distance To Surface Geometry inside
- //: the current voxel. In world coords.
- vox_000.vod.dis_nex =( 0.0 );
- //: vox_000.vod.dis_sur =( 0.0 );
- //:Voxels will be thought of as 3D tiles:
- vox_000.voc.has = uint( 0 ); // :1: //
- vox_000.voc.val = uint( 0 ); // :2: //
- vox_000.voc.til_d3d = int( 0 ); // :3: //
- vox_000.voc.t_x = int( 0 ); // :4: //
- vox_000.voc.t_y = int( 0 ); // :5: //
- vox_000.voc.t_z = int( 0 ); // :6: //
- //:RAY_MARCH_LOOP:-----------------------://
- /** #ABOUT_RAY_MARCH_LOOP# **/
- //:(RayMarch)March to VOXEL:
- for( int i = 0; i < MAX_STE ; i++ ){
- //:March by distance to next voxel:
- //:Point_Normal_Form_To_Get:xyz
- //:#DISTANCE_IS_NOT_CUMULATIVE#
- rwN=normalize(rwN); //:TEMP_DEBUG
- xyz = xyz + ( rwN * (D_N+0.0) );;
- //: xyz = xyz + ( rwN * -8.0 );
- /** B4 : GET_vox_000_USE_xyz_rwN **/
- xyz_TDF_rwC += D_N;
- if( xyz_TDF_rwC > MAX_DIS ){break;};
- //:@WHATVOX@://
- vox_000 =
- GET_vox_000_USE_xyz_rwN(
- xyz,rwN );;
- //:if( D_N <= 0.0 we have trouble )
- F32 MF3=intBitsToFloat(0x7f7fFFFF);
- if( 0.0 - 666.0 == D_N ){
- /** Exit On Error **/
- /** #DIST_NEXT_NEVER_ZERO# **/
- c4d=PIX_ERR(ERR_003,c4d,o_k--);
- break;
- }else
- if( vox_000.vod.dis_nex <= 0.0 ){
- //:PULSING:ORANGE:VIA:POS_COS:
- F32 p_c=((cos(iTime)+1.0)/2.0);
- c4d=V_4(V_3(1,0.5,0)*p_c,1.0);
- break;
- }else
- if( D_N == MF3 /** MaxFloat32 **/ ){
- F32 p_c=((cos(iTime)+1.0)/2.0);
- c4d=V_4(V_3(1,0.5,1)*p_c,1.0);
- break;
- }else
- if( isinf( D_N ) ){
- c4d=u32_CTO_c4d(U32(
- 0xE0E0E0FF ));
- };;
- //:If voxel is not empty, ray march
- //:inside of the voxel.
- #define _0_ U32( 0 ) //:#########://
- if( HAS > _0_ && _0_ == VAL ){
- //:EMPTY_TILE_INSIDE_MAP_BOUNDS:
- c4d=u32_CTO_c4d(U32(
- 0x003300FF ));
- }else
- if( _0_ == HAS ){
- //:OUT_OF_MAP_BOUNDS:
- // c4d=u32_CTO_c4d(U32(
- // 0x330011FF ));
- xyz_TDF_rwC=(length(xyz - rwC));
- F32 per=(xyz_TDF_rwC / MAX_DIS);
- F32 inv=( 1.0 - per );
- c4d=V_4( V_3(1)*(inv) , 1.0 );
- }else
- if( HAS > _0_ && VAL > _0_ ){
- vox_mar =(
- sdf_MarchIntoVoxel(
- vox_000,xyz,rwN
- ));;
- /*[FIX]: ALWAYS RETURNS EXIT */
- if( vox_mar.exit >= U32(1) ){
- //: c4d=( u32_CTO_c4d(
- //: vox_000.voc.val ) );;
- c4d =( vox_000_CTO_c4d(
- vox_000 ));;
- break;
- };;
- }else{
- //:SHOULD_NEVER_EXECUTE:
- c4d=V_4(1,0,0,1);
- };;
- #undef _0_ //:#################://
- /** Don't move the ray anywhere **/
- /** We are going to slice into **/
- /** whatever voxels the camera **/
- /** plane passes through. **/
- if( CFG_SLICE_RENDER >= 1 ){
- break;
- };;
- };;
- //:-----------------------:RAY_MARCH_LOOP://
- if( CFG_SLICE_RENDER >= 1 ){
- //:Layer value, 1 or 0
- int lay = I32_MOD( T_Z, 2 );
- //:#MODULO_CHECKER_PATTERN#://
- int chk =(
- I32_MOD( //:<<<<<<<<<<<<<<:SET_003
- I32_MOD( T_Y, 2 ) //:SET_YYY
- + I32_MOD( T_X, 2 ) //:SET_XXX
- , 2
- )
- );;
- if( 0 != 0
- || ( lay < 0 )
- || ( lay > 1 )
- || ( chk < 0 || chk > 1 )
- || ( HAS > uint(1) )
- ){
- //: _0x010101_ & _0x101010_
- c4d=PIX_ERR(ERR_001,c4d,o_k--);
- };;
- F32 M =( 255.0); //:Max RGB value.
- F32 X =( 1.0 ); //:FOR_DEBUGGING_COLORS
- //:F32 ...........; Replace with "_"
- //:F32 ...........; when done debugging.
- F32 a =( 1.0 ); //:ALPHA
- F32 _ =( 0.0 );
- F32 g =( F32(0x33)/M ); //:DARK-GREY
- F32 G =( F32(0x38)/M );
- F32 w =( F32(0xE5)/M ); //:WHITE-GREY
- F32 W =( F32(0xF2)/M );
- V_4 _0x333333_ =V_4(g,g,g,a);
- V_4 _0x383838_ =V_4(G,G,G,a);
- V_4 _0xE5E5E5_ =V_4(w,w,w,a);
- V_4 _0xF2F2F2_ =V_4(W,W,W,a);
- V_4 _0x003300_ =V_4(_,g,_,a);
- V_4 _0x003800_ =V_4(_,G,_,a);
- V_4 _0x00E500_ =V_4(_,w,_,a);
- V_4 _0x00F200_ =V_4(_,W,_,a);
- V_4 tab_000[8]=V_4[8](
- //:OUT OF BOUNDS: //:HAS?
- _0x333333_ , _0x383838_ //:LAY0
- ,_0xE5E5E5_ , _0xF2F2F2_ //:LAY1
- //: | CHK0 | CHK1 |::::::::://
- //:IN BOUNDS: //:HAS?
- ,_0x003300_ , _0x003800_ //:LAY0
- ,_0x00E500_ , _0x00F200_ //:LAY1
- //: | CHK0 | CHK1 |::::::::://
- );;
- I32 pik = (
- (4 * ( HAS >= uint(1) ? 1 : 0 ))
- + (2 * lay ) //: LAY0 -or- LAY1
- + (1 * chk ) //: CHK0 -or- CHK1
- );;
- if( pik < 0 || pik >= 8 ){
- c4d=PIX_ERR(ERR_002,c4d,o_k--);
- };;
- //:TODO: Why is not rendering as
- //: checker?
- if( 1 == o_k ){
- c4d = tab_000[ pik ];
- };;
- }else{
- //:DEBUG ONLY.
- //:c4d=V_4(1,1,1,1);
- };;
- return( c4d );
- }
- #undef T_X
- #undef T_Y
- #undef T_Z
- #undef HAS
- #undef VAL
- #undef D_N
- //:==============================:sdf_RenderScene://
- //:=================================:RENDER_SCENE://
- //:11111111111111111111111111111111111111111111111111://
- //:00000000000000000000000000000000000000000000000000://
- void mainImage(
- out vec4 fragColor
- , in V_2 fragCoord
- )
- {
- #define R_Y iResolution.y
- V_2 f_c = V_2(
- //:( FLIP? ) ( Discrete XY ) ://
- ( 0.0 ) + ( fragCoord.x - 0.5 )
- , (R_Y-1.0) - ( fragCoord.y - 0.5 )
- );;
- #undef R_Y
- V_2 f_p = f_c_CTO_f_p( f_c );
- //:CAMERA_RAY_FOR_CURRENT_PIXEL:-------------://
- /** The coordinate and direction of the **/
- /** camera ray [rwC,rwN] are closely **/
- /** related, so return them using the **/
- /** same function. This will save **/
- /** processing power when we decide **/
- /** to create a camera lense that **/
- /** is a 360 degree cylinder around **/
- /** an object. (for fun) **/
- RWC_AND_RWN
- rwC_AND_rwN;
- rwC_AND_rwN = f_p_CTO_rwC_AND_rwN( f_p );
- //:-------------:CAMERA_RAY_FOR_CURRENT_PIXEL://
- fragColor = sdf_RenderScene( rwC_AND_rwN );
- }
- //:00000000000000000000000000000000000000000000000000://
- //:DOCUMENTATION:====================================://
- /** ************************************************ ***
- ABBREVIATIONS:
- f : fragment
- p : percent (Never Position, use C for coord)
- c : coordinate
- r : ray
- n : normal, for directions.
- d : distance. NEVER DIRECTION.( use: n:normal )
- IDENTIFIERS:
- CTO: Convert_TO
- rwC: RayWorldCoord
- rwN: RayWorldNormal
- f_p: FragPercent
- f_c: FragCoord (With Discrete Pixel Coords)
- (instead of pixel centers )
- dad: Distance_And_inDEX
- Index is 1D index of XYZ voxel tile
- coordinate.
- vat: Voxel_Array__of__Tiles
- c4d: Color_4_Dimensional(RGBA)
- FUNCTIONS:
- f_c_CTO_f_p : FragmentCoord -CTO- FragPercent
- f_c_CTO_per : USE[ f_c_CTO_f_p ]
- sdf_i3d : Interpolate_Two_3D_Points
- CTRL_F_INDEX: (CTRL+F:INDEX, Search Phrases)
- (CTR + F)<-- Spaces Between Letters
- Which Voxel Am I On? .... SEE[ @WHATVOX@ ]
- What Voxel Am I On? ..... SEE[ @WHATVOX@ ]
- Find Current Voxel ...... SEE[ @WHATVOX@ ]
- pix_3d3 ................. TYPOFIX[ pix_d3d ]
- til_3d3 ................. TYPOFIX[ til_d3d ]
- cd4 ..................... TYPOFIX[ c4d ]
- m3d ..................... TYPOFIX[ m2d ]
- Voxel To Color Debug .... SEE[ @VOXBUGCOLOR@ ]
- gradient,Gradient........ SEE[ @VOXBUGCOLOR@ ]
- which voxel are we in ... SEE[ @WHATVOX@ ]
- EXTRACTED_BLOCK_COMMENTS:
- #ABOUT_RAY_MARCH_LOOP###########################
- Ray marching loop should be able to look
- at the current voxel coordinate returned
- and decide to STOP marching if it wants.
- By stopping immediately without marching
- at all we can make the camera phosphore
- surface a slice plane that renders
- cross sectional views of tilemap data.
- ##########################ABOUT_RAY_MARCH_LOOP##
- #POSITIVE_Z_DIVES_INTO_SCREEN###################
- Positive Z is further back into screen.
- This way to help normalize voxel grid math.
- ###################POSITIVE_Z_DIVES_INTO_SCREEN#
- #FIND_POINT_ON_SCREEN_PLANE#####################
- ORIGINAL_COMMENT:
- Polygon in 3d space to serve as the
- phosphor surface the CRT monitor
- electrons will be projected onto.
- Could probably use a mat4 for this.
- MORE_INFORMATION_IN_RETROSPECT:
- "Screen Plane" is also known as
- "CRT Phospore" or "PHO" for short.
- This is a plane put into 3D space that
- represents the pixels of the client
- viewport (physical monitor).
- The "IMAGE" plane from this diagram:
- https://tinyurl.com/IMAGE-PLANE
- #####################FIND_POINT_ON_SCREEN_PLANE#
- #MODULO_CHECKER_PATTERN#########################
- // Checker pattern value, 1 or 0. //
- // Combine Sets so that they create //
- // a checkerboard of odd/even values, //
- // and then convert even to 0 and //
- // odd to 1. //
- // //
- // SET_YYY:[ 0 1 0 1 0 1 0 ] //
- // SET_XXX:[ 0 1 0 1 0 1 0 ] //
- // //
- // SET_XXX: [ 0 1 0 1 0 1 0 ] //
- // | | | | | | | //
- // SET_YYY:[ 0 ]- 0 1 0 1 0 1 0 //
- // [ 1 ]- 1 2 1 2 1 2 1 //
- // [ 0 ]- 0 1 0 1 0 1 0 //
- // [ 1 ]- 1 2 1 2 1 2 1 //
- // [ 0 ]- 0 1 0 1 0 1 0 //
- // [ 1 ]- 1 2 1 2 1 2 1 //
- // [ 0 ]- 0 1 0 1 0 1 0 //
- int chk =(
- I32_MOD( // <<<<<<<<<<<<<< SET_003
- I32_MOD( T_Y, 2 ) // SET_YYY
- + I32_MOD( T_X, 2 ) // SET_XXX
- , 2
- )
- );;
- #########################MODULO_CHECKER_PATTERN#
- #CONSISTENT_VOXEL_COORDS########################
- The tilemap math for calculating what
- [voxel/tile] we are inside of is
- geometrically consistent, even when
- given NEGATIVE numbers.
- Meaning: The FIRST PIXELS of any
- [tile/voxel] are in the same
- relative position.
- +-+-----+-+-----+-+-----+-+-----+
- | | -1 | | 0 | | +1 | | +2 |
- | | | | | | | | |
- | +-----| +-----| +-----| +-----+
- +-------+-------+-------+-------+
- +-+
- | | <--- The first edge of pixels for
- | | [voxel/tile] seen on the X/Y
- | +-----| axis.
- +-------+
- ########################CONSISTENT_VOXEL_COORDS#
- #NEXT_VOXEL_BOUNDING_VOLUME#####################
- Assuming vectors are moving in a positive
- direction, the intersection point to
- next voxel MUST be within the bounds of
- the CURRENT VOXEL + One Pixel All Around.
- Because we know the DIRECTION of the
- ray vector, we don't need a bounding volume
- and can just check that the respective
- X,Y,Z bounding planes have
- not been exceeded.
- +--------------------+--------------------+
- | | |
- | +- - - - - -+ | +- - - - - -+ |
- | | | | | | |
- | | |
- | | | | | | |
- | | |
- | | | | | | |
- | +- - - - - -+ | +- - - - - -+ |
- 111111111111111111111111111 |
- 1 +--------------------+-1------------------+
- 1 | | 1 |
- 1 | +- - - - - -+ | 1 +- - - - - -+ |
- 1 | | | | 1 | | |
- 1 | | 1 |
- 1 | | CV | | 1 | | |
- 1 | (CurVoxel) | 1 |
- 1 | | | | 1 | | |
- 1 | +- - - - - -+ | 1 +- - - - - -+ |
- 1 | | 1 |
- 1 +--------------------+-1------------------+
- 111111111111111111111111111
- #####################NEXT_VOXEL_BOUNDING_VOLUME#
- #VOX_MAR_ABOUT##################################
- VOX_MAR: ( VOXel_MARch )
- Holds information about ray
- marching WITHIN a single voxel.
- ##################################VOX_MAR_ABOUT#
- #DISTANCE_IS_NOT_CUMULATIVE#####################
- WRONG: xyz = rwC + ( rwN * D_N );
- RIGHT: xyz = xyz + ( rwN * D_N );
- The distance is NOT cumulative. Our ray
- marching is not anchored to the original
- ray world coordinate ( rwC ).
- Reason:
- Collision with the first pixel of
- the next voxel is PIXEL PERFECT and
- if[ D_N ]were a cumulative distance
- over multiple iterations we would
- probably see weird artifacts as slight
- rounding errors compound.
- Thus do NOT anchor to[ rwC ]but
- rather make a new origin location at
- [ xyz ]each loop iteration.
- Think: Folds in orgami.
- #####################DISTANCE_IS_NOT_CUMULATIVE#
- #DIST_NEXT_NEVER_ZERO###########################
- Even if you are 1 pixel away from the next
- voxel, the distance to the next voxel should
- NEVER be zero. It should always be a
- POSITIVE NON-ZERO value.
- If this is NOT the case, your point-normal
- form ray marching will fail.
- ###########################DIST_NEXT_NEVER_ZERO#
- #TRAP_VALUE_MUST_BE_NEG_666#####################
- Using ( 0.0 - 666.0 ) as a trap value
- in our code that determines the distance
- to the next voxel. If you detect (-666.0)
- in your ray march loop, it means that
- the distance to the next voxel was never
- set. Distance to next voxel should ALWAYS
- be NON-ZERO and POSITIVE.
- #####################TRAP_VALUE_MUST_BE_NEG_666#
- #PIXEL_PROBABILITY_CLOUD########################
- [TODO](MAYBE)
- We should probably have 1 pixel equal to
- 3 native frag coords. That way if you
- are in the CENTER of the pixel, you know
- you don't need to alias. But if you are
- on one of the boarder edges, you know
- you need to use some aliasing.
- [ONE FRAG COORD]
- _|_
- / \
- + + X: CENTER, no aliasing
- | | required.
- V V
- +---+---+---+ <--+
- | | | | \
- +---+---+---+ \
- | | X | | +--[ ONE PIXEL ]
- +---+---+---+ /
- | | | | /
- +---+---+---+ <--+
- ########################PIXEL_PROBABILITY_CLOUD#
- #VOXEL_EDGE_COLOR###############################
- When percent(per) is zero the edges are
- BLACK and blend with background. That is
- not very useful for debugging, so lets
- give the edges a useful color coding to
- identify which planes of the voxel are
- intersecting at that edge.
- +--.--+--.--+
- 1\ \ \ [X]: X_Plane: RED
- 1 \ --[Z]-- \ [Y]: Y_PLANE: GREEN
- 1 \ \ \ [Z]: Z_PLANE: BLUE
- 1 +--.--+--.--+
- 1[X]2 3 1: Edge 1, YELLOW (R+G)
- + 2 3 2: Edge 2, YELLOW (R+G)
- \ 2 [Y] 3 3: Edge 3, YELLOW (R+G)
- \ 2 3
- \2 3
- +--.--+--.--+
- +--.--+--.--+ 4: Edge 4, MAGENTA (R+B)
- |4 \ \ 5: Edge 5, CYAN (G+B)
- | 4 --[Z]-- \ 6: Edge 6, YELLOW (R+G)
- | 4 \ \
- | +55555555555+
- |[X]6 | (Edge #'s Are Arbitrary)
- + 6 | (and do NOT reflect )
- \ 6 [Y] | (values in our code. )
- \ 6 |
- \6 | (Aritrary as in for )
- +--.--+--.--+ (illustrative purposes.)
- ###############################VOXEL_EDGE_COLOR#
- #NO_ELSE_FOR_EDGE_COLORING######################
- Statement for calculating edge colors
- should NOT have "else" or "if else"
- because 2 planes intersect at edges
- and 3 planes intersect at vertex.
- THUS: EDGES : 2ndary(secondary) colors.(CMY)
- VERTEX: WHITE (R+G+B)
- ######################NO_ELSE_FOR_EDGE_COLORING#
- #STRATA_OF_2D_TILEMAPS##########################
- We abstract the 3D tilemap (voxelmap) data
- as a series of 2-dimensional tile maps
- that are stacked on top of each other.
- Because positive Z moves DOWN INTO THE
- MONITOR, larger Z-layers go further
- back into the screen.
- U32
- VAT[ NTX * NTY * NTZ ]= U32[ 8 * 4 * 7 ](
- //: Z == 0 === First 2D TileMap
- //: 1 2 3 4 5 6 7 8 --- -------------
- _,_,_,_,_,_,_,_, //: 1 | ^
- _,_,_,_,_,_,_,_, //: 2 | Z == 0 |
- _,_,_,_,_,_,_,_, //: 3 | |
- _,_,_,_,_,_,_,_, //: 4 | |
- //: --- |
- //: 1 2 3 4 5 6 7 8 --- |
- _,_,_,_,_,_,_,_, //: 1 | TILEMAP_STRATA
- _,_,_,_,_,_,_,_, //: 2 | |
- _,_,_,_,_,_,_,_, //: 3 | Z == 1 |
- _,_,_,_,_,_,_,_, //: 4 | |
- //: --- |
- //: 1 2 3 4 5 6 7 8 --- |
- _,_,_,_,_,R,_,_, //: 1 | |
- _,_,_,_,Y,_,_,_, //: 2 | Z == 2 |
- _,_,_,M,_,_,_,_, //: 3 | |
- _,_,C,_,_,_,_,_, //: 4 | V
- //: --- -------------
- );
- //: Z == 2 === First 2D TileMap
- ##########################STRATA_OF_2D_TILEMAPS#
- #BACK_SLASH_COMMENT_FUCKERY#####################
- The use of "\" in a comment line seems
- to be erroneously interpreted as a newline.
- Example: Below wil NOT compile, even
- though it is syntactically correct.
- U32
- VAT[ NTX * NTY * NTZ ]= U32[ 8 * 4 * 1 ](
- //: 1 2 3 4 5 6 7 8
- _,_,_,_,_,_,_,_, //: 1 \
- _,_,_,_,_,_,_,_, //: 2 \__ Z == 0
- _,_,_,_,_,_,_,_, //: 3 /
- _,_,_,_,_,_,_,_, //: 4 /
- );
- #####################BACK_SLASH_COMMENT_FUCKERY#
- #MINUS_EPSILON##################################
- NEG POS
- | |
- V V
- | |
- +---+ +---+
- |_n_| |_p_|
- +-----------++-----------++-----------+
- | | | || | | || | | |
- |---+---+---||---+---+---||---+---+---|
- | |-1 | || | 0 | || |+1 | |
- |---+---+---||---+---+---||---+---+---|
- | | | || | | || | | |
- +-----------++-----------++-----------+
- |_n_| |_p_|
- +---+ +---+
- | |
- ^ ^
- | |
- NEG POS
- We wanted to do the math so tha the bounds
- of the voxel were measured in our plank
- unit of 1-pixel. But that doesn't work.
- BAD__BOUNDS: _n_ & _p_
- GOOD_BOUNDS: NEG & POS
- The POSITIVE bounds work by co-incidence
- when thinking of pixels as discrete
- units without thickness because....
- 0.0 <-- POS == _p_
- |
- +---|||---+
- | |
- | 0 |
- | (_p_) |
- +---|||---+
- |
- 1.0
- However, with the NEGATIVE bounds,
- the discrete math does not co-incidentially
- line up like this.
- 0.0
- |
- +---|||---+
- | |
- | 0 |
- | (_n_) |
- +---|||---+
- |
- 1.0 <-- NEG != _n_
- So, while we would like to keep all of
- our reasoning to conceptual pixels that
- have no thickness and do this:
- ( B == boudary where NEXT voxel is )
- +---+---+---+---+---+ <---+
- | B | B | B | B | B | |
- +---+===========+---+ |
- | B | | | | B | |
- +---|- -+- -+- -|---+ |
- | B | | 0 | | B | +---[WRONG]
- +---|- -+- -+- -|---+ |
- | B | | | | B | |
- +---+===========+---+ |
- | B | B | B | B | B | |
- +---+---+---+---+---+ <---+
- It is actually more like this:
- +--BUT__HERE--+
- | |
- |+--NOTHERE--+|
- || ||
- VV VV
- +---||---+---+---||---+
- | B || B | B | B || B |
- ----++-----------++---- <-- BUT_HERE
- ----++-----------++---- <-- NOT_HERE
- | B || | | || B |
- +---||---+---+---||---+
- | B || | 0 | || B |
- +---||---+---+---||---+
- | B || | | || B |
- ----++-----------++---- <-- NOT_HERE
- ----++-----------++---- <-- BUT_HERE
- | B || B | B | B || B |
- +---||---+---+---||---+
- In other news, a perfect 45 degree angle
- from the center of one voxel is NOT
- an edge case. Because the math for that
- only computes the distance to the next
- voxel, not the VALUES(PLURAL) of the
- next voxel. ( VALUES == VOX_000 instance )
- +===========+
- | B | B | B |
- |---+---+---|
- | B |V_2| B |
- +---+---+---+---|---/---+---|
- | B | B | B | B | / | B | B |
- +---+===========/===========+
- | B | / | B |
- +---| / |---+
- | B | V_1 | B |
- +---| |---+
- | B | | B |
- +---+===========+---+
- | B | B | B | B | B |
- +---+---+---+---+---+
- #DIAGONAL_IS_NOT_AN_EDGE_CASE#
- ( V_1 to V_2 works fine)
- ( V_1 == voxel #1 )
- ( V_2 == voxel #2 )
- ##################################MINUS_EPSILON#
- #ITBIDKW########################################
- ITBIDKW: It works, but I don't know why.
- 1. EPS_X,EPS_Y,EPS_Z, exactly 0.0001
- No smaller, no larger. No fucking clue
- why this magic number works.
- ########################################ITBIDKW#
- *** ************************************************ **/
- //:====================================:DOCUMENTATION://
- //:UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU://
- /** U : Undefine Macros Section **/
- #undef V_4
- #undef V_3
- #undef V_2
- #undef F32
- #undef I32
- #undef U32
- /** U : Undefine Macros Section **/
- //:UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU://
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