World - Revision history

Mddass: /* Item 1: Header */

2020-01-10T02:00:22Z

‎Item 1: Header

Mddass: /* Extracting Texture Information */

2019-10-26T21:54:59Z

‎Extracting Texture Information

Chekwob: 8 revisions imported: Initial import from Wikia

2019-04-27T17:44:40Z

8 revisions imported: Initial import from Wikia

Wikia>Thaswordster: /* PSX GPU Framebuffer */ Each of the upper displays run at 15FPS each unless frames are skipped (from emulators).

2015-10-09T22:00:24Z

‎PSX GPU Framebuffer: Each of the upper displays run at 15FPS each unless frames are skipped (from emulators).

Wikia>Thaswordster: /* Texture coordinates */ Fixing table

2015-10-07T15:55:14Z

‎Texture coordinates: Fixing table

Wikia>Thaswordster: /* Format */

2015-09-27T02:16:43Z

‎Format

Wikia>WurlyFox at 22:17, 7 September 2015

2015-09-07T22:17:41Z

Wikia>WurlyFox: /* Format */

2015-08-20T06:51:37Z

‎Format

Wikia>WurlyFox at 06:47, 20 August 2015

2015-08-20T06:47:15Z

Wikia>WurlyFox at 06:16, 20 August 2015

2015-08-20T06:16:46Z

@@ Line 72: / Line 72: @@
 Data in the Texture Info Array is consisted of either 4 and/or 8 byte structures with the following formats:
-<code>Format A: 0******* RRRRRRRR GGGGGGGG BBBBBBBB</code>
+<code>Format A: 0******* BBBBBBBB GGGGGGGG RRRRRRRR</code>
-<code>Format B: 1SS0HHHH RRRRRRRR GGGGGGGG BBBBBBBB DDDDDDDD DDMMLLXX XXXZZZZZ ZZ0YYYYY</code>
+<code>Format B: 1SS0HHHH BBBBBBBB GGGGGGGG RRRRRRRR DDDDDDDD DDMMLLXX XXXZZZZZ ZZ0YYYYY</code>
 * <code>S</code> = Semi-Transparency Mode
@@ Line 84: / Line 84: @@
 * <code>Z</code> = Primary CLUT ID
 * <code>H</code> = Secondary CLUT ID
-* R = Red Value?
+* <code>R</code> = Red Value (unused)
-* G = Green Value?
+* <code>G</code> = Green Value (unused)
-* B = Blue Value?
+* <code>B</code> = Blue Value (unused)
 # A structure of format A describes optional color information ('''unconfirmed''') for a polygon that will be converted to a non-textured primitive.

@@ Line 174: / Line 174: @@
       vertex A          vertex B          vertex C          vertex D</pre>
-From these various sources, texture information is extracted, manipulated, and rearranged before it is finally recorded in the texture-related fields of the polygon's POLY_GT3 primitive. These fields include the <code>tpage</code>, <code>u0</code>, <code>v0</code>, <code>u0</code>, <code>v1</code>, <code>u2</code>, <code>v2</code>, and <code>clut</code> fields.
+From these various sources, texture information is extracted, manipulated, and rearranged before it is finally recorded in the texture-related fields of the polygon's POLY_GT3 primitive. These fields include the <code>tpage</code>, <code>u0</code>, <code>v0</code>, <code>u1</code>, <code>v1</code>, <code>u2</code>, <code>v2</code>, and <code>clut</code> fields.
 ==== PSX GPU Framebuffer ====

@@ Line 177: / Line 177: @@
 ==== PSX GPU Framebuffer ====
-The Playstation GPU has 1MB of VRAM. Interpreted as an array of 16 bit pixels, the entire 1MB region of VRAM is a surface of 1024x512 resolution. In the Crash games, the upper left 512x256 quadrant contains the on-screen display buffer/pixel data while the upper right 512x256 quadrant contains the off-screen draw buffer/pixel data. The lower 1024x256 half is consisted of several ''texture pages''; together, all texture pages are consisted of all texture data loaded into VRAM. A single textured polygon  primitive specifies a 2-dimensional image of pixels, or texture, that is mapped to its surface when rendered. A polygon primitive specifies its texture as the 2-dimensional area, within a specific texture page, that contains the texture image/pattern.
+The Playstation GPU has 1MB of VRAM. Interpreted as an array of 16 bit pixels, the entire 1MB region of VRAM is a surface of 1024x512 resolution. In the Crash games, the upper left 512x256 quadrant contains the on-screen display of the first frame in every 2-frame "cycle", while the upper-left 512x256 quadrant contains the on-screen display of the second frame in every 2-frame "cycle". The lower 1024x256 half is consisted of several ''texture pages''; together, all texture pages are consisted of all texture data loaded into VRAM. A single textured polygon  primitive specifies a 2-dimensional image of pixels, or texture, that is mapped to its surface when rendered. A polygon primitive specifies its texture as the 2-dimensional area, within a specific texture page, that contains the texture image/pattern.
 For texture pages, VRAM is also alternatively interpreted as an array of either 2048x512 8 bit pixels or 4096x512 4 bit pixels. The pixel data in a texture page can include either 16 bit pixels, 8 bit pixels, or 4 bit pixels; some portions of a texture page may specify 4 bit pixels while the others may specify 8 or 16 bit pixels. A polygon primitive specifies the ''color mode'' for its texture as either mode 0 = 4 bits, mode 1 = 8 bits, or mode 2 = 16 bits; this means that the region of pixels that it specifies is consisted of either 4 bit, 8 bit, or 16 bit pixels.

@@ Line 282: / Line 282: @@
 !0
+|
-−
+  C
-  <nowiki>  |\
+  <nowiki>   |\
     | \
   A |--\ B</nowiki>
@@ Line 312: / Line 312: @@
 !3
+|
- B     C
+  B     C
-  <nowiki>  |--/
+  <nowiki>   |--/
     | /
   A |/</nowiki>
@@ Line 372: / Line 372: @@
   <nowiki>----------
    </nowiki> yyyyyyyy (vv)
-−
 ==== CLUT coordinates ====

@@ Line 35: / Line 35: @@
 |-
 |0xC
-|R?
+|Polygon count
 |4 bytes
 |*
 |-
 |0x10
-|G?
+|Vertice count
 |4 bytes
 |*
 |-
 |0x14
-|B?
+|Texture info structures
 |4 bytes
 |*

← Older revision	Revision as of 17:44, 27 April 2019
(No difference)

← Older revision		Revision as of 22:17, 7 September 2015
Line 1:		Line 1:
−	A World is a 3 dimensional gouraud-shaded textured/semi-textured or non-textured polygon mesh that represents a visible portion of a level; all together, the world(s) [entries] in an NSF file represent the entire model for the corresponding level. Worlds are Type 4 entries. Each zone specifies at most 8 world models that shall be rendered [and will appear to the player] when the player character is within its confines. For each frame of execution, the corresponding polygon primitives are re-generated from the model data for the 8 worlds in the current zone, transformed according to global matrices (i.e. camera trans, rot, and scale) including a perspective transform from 3 dimensions to 2, and finally sent to the GPU for rendering. As a result, the player observes the [up to] 8 world models from the perspective of the camera at its current point/progress along its current path within the current zone.	+	A World is a 3 dimensional gouraud-shaded textured/semi-textured or non-textured polygon mesh that represents a visible portion of a level; all together, the world(s) [entries] in an NSF file represent the entire model for the corresponding level. Worlds are Type 3 entries. Each zone specifies at most 8 world models that shall be rendered [and will appear to the player] when the player character is within its confines. For each frame of execution, the corresponding polygon primitives are re-generated from the model data for the 8 worlds in the current zone, transformed according to global matrices (i.e. camera trans, rot, and scale) including a perspective transform from 3 dimensions to 2, and finally sent to the GPU for rendering. As a result, the player observes the [up to] 8 world models from the perspective of the camera at its current point/progress along its current path within the current zone.

	== Introduction ==		== Introduction ==

@@ Line 9: / Line 9: @@
 == Format ==
 === Item 1: Header ===
 {| class="article-table"
 !Offset
@@ Line 90: / Line 93: @@
 Each polygon (see below) specifies an offset into the texture info array of the structure that describes a specific region of pixel data [in some texture page] that maps to it (or to describe no texture data at all). The texture page EIDs refer to 8 different texture pages that can be used as sources for texture data. A polygon will refer to one of these 8 EIDs as the source texture page from which to grab the pixel data.
-=== Item 2: Polygons ===
+==== Item 2: Polygons ====
 {| class="article-table"
 !Offset
@@ Line 116: / Line 119: @@
 * I = ignored?
-=== Item 3: Vertices ===
+==== Item 3: Vertices ====
 {| class="article-table"
 !Offset

@@ Line 71: / Line 71: @@
 <code>Format A: 0******* RRRRRRRR GGGGGGGG BBBBBBBB</code>
-<code>Format B: 1SS0HHHH RRRRRRRR GGGGGGGG BBBBBBBB DDDDDDDD DDMMLLGG GGGZZZZZ ZZ0AAA00</code>
+<code>Format B: 1SS0HHHH RRRRRRRR GGGGGGGG BBBBBBBB DDDDDDDD DDMMLLXX XXXZZZZZ ZZ0YYYYY</code>
 * <code>S</code> = Semi-Transparency Mode
@@ Line 79: / Line 79: @@
 * <code>Y</code> = Texture Y offset
 * <code>D</code> = Texture Region Index
-* <code>Z</code> = CLUT Y (as groups of 4 palettes, or 64 colors (1 palette = 16 colors))
+* <code>Z</code> = Primary CLUT ID
-* <code>H</code> = CLUT palette color offset
+* <code>H</code> = Secondary CLUT ID
-# A structure of format A describes optional color shading information ('''unconfirmed''') for a polygon that will be converted to a non-textured primitive.
+# A structure of format A describes optional color information ('''unconfirmed''') for a polygon that will be converted to a non-textured primitive.
 # A structure of format B describes texture information for a polygon that will be converted to a textured/semi-textured primitive (explained in detail below).
@@ Line 157: / Line 160: @@
 .  Texture chunk index/palette
-This field is resolved by processing/lookup of the texture page EID specified for the polygon. A polygon specifies a texture page EID by its index within the [array of 8] Texture Page EIDs in the world's header item (Item 1). (E bits) <pre>00000000 0000PPPP PPPPPPPP Y??1XX??</pre>2.  Texture information
+This field is resolved by processing/lookup of the texture page EID specified for the polygon. A polygon specifies a texture page EID by its index within the [array of 8] Texture Page EIDs in the world's header item (Item 1). (E bits) <pre>00000000 0000RRRR RRRRRRPP Y??1XX??</pre>2.  Texture information
 A polygon specifies ''texture information'' by its index within the Texture Info Array of the world's header item (Item 1). (T bits)
@@ Line 208: / Line 211: @@
 ====== Texture Chunk Index/Palette ======
-  00000000 0000PPPP PPPPPPPP Y??1XX??
+  00000000 0000RRRR RRRRRRPP Y??1XX??
 * X = Texture Chunk X Index
@@ Line 226: / Line 229: @@
 Thus, the complete extraction of bitfields:
   KSS0HHHH 00000000 00000000 00000000 DDDDDDDD DDMMLLXX XXXZZZZZ ZZ0YYYYY
-  00000000 0000PPPP PPPPPPPP Y??1XX??
+  00000000 0000RRRR RRRRRRPP Y??1XX??
+                |
+                V
@@ Line 251: / Line 254: @@
 ====== Texture Chunk Index/Palette ======
-  00000000 0000PPPP PPPPPPPP Y??1XX??
+  00000000 0000RRRR RRRRRRPP Y??1XX??
 * Y = Texture Chunk Y Index
@@ Line 278: / Line 281: @@
+  C
   <nowiki>  |\
-    | \
+   | \
-  A |--\ B</nowiki>
+ A |--\ B</nowiki>
 |ABC
 |4
@@ Line 308: / Line 311: @@
   B     C
   <nowiki>  |--/
-    | /
+   | /
-  A |/</nowiki>
+ A |/</nowiki>
 |BAC
 |32
@@ Line 326: / Line 329: @@
 |n/a
 |}
-  width = 2 ^ (2 + (index % 5));
+  actual width = 2 ^ (2 + (index % 5));
-  height = 2 ^ (2 + ((index / 5) % 5));
+  actual height = 2 ^ (2 + ((index / 5) % 5));
 (Note that width and height do not depend on color mode)
@@ Line 333: / Line 336: @@
 Quads have been pre-computed such that they have the attributes described by their indices. For example, the quad at index 48 has the following attributes:
-  width = 2 ^ (2 + (48 % 5)) = 32
+  actual width = 2 ^ (2 + (48 % 5)) = 32
-  height = 2 ^ (2 + ((48 / 5) % 5)) = 32
+  actual height = 2 ^ (2 + ((48 / 5) % 5)) = 32
   winding = (48 / 25) % 6 = 1
   flip = (48 / 150) = 0
@@ Line 346: / Line 349: @@
   KSS0HHHH 00000000 00000000 00000000 DDDDDDDD DDMMLLXX XXXZZZZZ ZZ0YYYYY
 And then the Texture Chunk Y Index from Texture Chunk Index/Palette :
-  00000000 0000PPPP PPPPPPPP y001xx00
+  00000000 0000RRRR RRRRRRPP y001xx00
 And finally the points from the Texture Region:
   XXXXXXXX YYYYYYYY XXXXXXXX YYYYYYYY XXXXXXXX YYYYYYYY XXXXXXXX YYYYYYYY
@@ Line 360: / Line 363: @@
   <nowiki>|</nowiki> XXXXX000 >> MM (txv)
   <nowiki>----------
-   </nowiki> xxxxxxxx (uv)
+  </nowiki> xxxxxxxx (uv)
     YYYYYYYY (ryv)
   <nowiki>|</nowiki> yYYYYY00 (tyv)
   <nowiki>----------
-   </nowiki> yyyyyyyy (vv)
+  </nowiki> yyyyyyyy (vv)
 ==== CLUT coordinates ====
@@ Line 420: / Line 423: @@
+            |
+            V
-ZZZZZ ZZPPHHHH    <nowiki>
+ZZZZZ ZZPPHHHH
-   |</nowiki> RRRRRRRR RR000000  or if R = 1Y00000000: 1Y0ZZZZZ ZZPPHHHH
+  | RRRRRRRR RR000000  or if R = 1Y00000000: 1Y0ZZZZZ ZZPPHHHH
    <nowiki>-------------------</nowiki>                        -----------------
   <nowiki> </nowiki>  YYYYYYYY YYXXXXXX                        YYYYYYYY YYXXXXXX<nowiki></nowiki>

← Older revision		Revision as of 06:16, 20 August 2015
Line 1:		Line 1:
−	A World is a 3 dimensional gouraud-shaded textured/semi-textured or non-textured polygon mesh that represents a visible portion of a level; all together, the world(s) [entries] in an NSF file represent the entire model for the corresponding level. Worlds are Type 4 entries. Each zone specifies at most 8 world models that shall be rendered [and will appear to the player] when the player character is within its confines. For each frame of execution, the corresponding polygon primitives are re-generated from the model data for the 8 worlds in the current zone, transformed according to global matrices (i.e. camera trans, rot, and scale) including a perspective transform from 2 dimensions to 3, and finally sent to the GPU for rendering. As a result, the player observes the [up to] 8 world models from the perspective of the camera at its current point/progress along its current path within the current zone.	+	A World is a 3 dimensional gouraud-shaded textured/semi-textured or non-textured polygon mesh that represents a visible portion of a level; all together, the world(s) [entries] in an NSF file represent the entire model for the corresponding level. Worlds are Type 4 entries. Each zone specifies at most 8 world models that shall be rendered [and will appear to the player] when the player character is within its confines. For each frame of execution, the corresponding polygon primitives are re-generated from the model data for the 8 worlds in the current zone, transformed according to global matrices (i.e. camera trans, rot, and scale) including a perspective transform from 3 dimensions to 2, and finally sent to the GPU for rendering. As a result, the player observes the [up to] 8 world models from the perspective of the camera at its current point/progress along its current path within the current zone.

	== Introduction ==		== Introduction ==