Memblocks - GameCreators Forum

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Vertex

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Joined: 21st Sep 2002

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Posted: 20th Feb 2003 17:00

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Hi!
Can You Say me how structured a Memblock next of
- Make Memblock From Bitmap
- Make Memblock From Image
- Make Memblock From Sound
- Make Memblock From Mesh
?
I have look in the help, but the informations
are very very little.

cu olli

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Richard Davey

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Joined: 30th Apr 2002

Location: On the Jupiter Probe

Posted: 20th Feb 2003 17:32

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Hi,

make memblock from image/bitmap:

Image Width (dword - 4 bytes)
Image Height (dword - 4 bytes)
Image Depth/Resolution (dword - 4 bytes)
Image Data = the rest of the memblock in byte format.

Example width: 800
Example height: 600
Example depth: 32

Example data: Read 4 bytes at a time (dword) to get the pixel colour value.

I'll find out the sound/mesh formats for you later on.

Cheers,

Rich

"Gentlemen, we are about to short-circuit the Universe!"
DB Team / Atari ST / DarkForge / Retro Gaming

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Shadow Robert

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Joined: 22nd Sep 2002

Location: Hertfordshire, England

Posted: 20th Feb 2003 17:45

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Bitmap/Image ->

+ Code Snippet

Memblock-Bitmap/Image (12 Byte Header)
-Header
--4 BYTES (DWORD) Width
--4 BYTES (DWORD) Height
--4 BYTES (DWORD) Depth
-Data
--X BYTES - Pixel Data (a 16bit bitmap uses 2 BYTES per Pixel)

16bit = 2byte word per pixel
32bit = 4byte RGBA

Sound ->

+ Code Snippet

Memblock-Sound (12 Byte Header)
-Header
--4 BYTES (DWORD) Bits per Sample
--4 BYTES (DWORD) Frequency
--4 BYTES (DWORD) Number of Samples
-Data
--X BYTES - Sample Data (16bit sound data uses a 2 BYTE sample)

Mesh ->

Memblock-Mesh (32 Byte Header)
-Header
--4 BYTES (DWORD) Number Of Vertices
--4 BYTES (DWORD) Offset in Bytes to Vertice Data
--4 BYTES (DWORD) Number Of Normals
--4 BYTES (DWORD) Offset in Bytes to Normals Data
--4 BYTES (DWORD) Number of Faces
--4 BYTES (DWORD) Offset in Bytes to Face Data
--4 BYTES (DWORD) Size Of All Face Data
--4 BYTES (DWORD) Offset in Bytes to Texture UV Data
-Data
--Vertice Data
---For Each Vertex
----4 BYTES (FLOAT) - X Position of 3D Geometry
----4 BYTES (FLOAT) - Y Position of 3D Geometry
----4 BYTES (FLOAT) - Z Position of 3D Geometry
--Normals Data
---For Each Normal
----4 BYTES (FLOAT) - X Normalised Normal of 3D Geometry
----4 BYTES (FLOAT) - Y Normalised Normal of 3D Geometry
----4 BYTES (FLOAT) - Z Normalised Normal of 3D Geometry
--Face Data
---For Each Face (a face makes a polygon using A,B and C as vector points)
----2 BYTES (WORD) - Number of Vectors in Face (always use 3)
----2 BYTES (WORD) - Index to Vertex in Vertex Data for Vector A
----2 BYTES (WORD) - Index to Normal in Vertex Data for Vector A
----2 BYTES (WORD) - Index to Vertex in Vertex Data for Vector B
----2 BYTES (WORD) - Index to Normal in Vertex Data for Vector B
----2 BYTES (WORD) - Index to Vertex in Vertex Data for Vector C
----2 BYTES (WORD) - Index to Normal in Vertex Data for Vector C
--Texture Data
---For Each Vertex
----4 BYTES (FLOAT) - U Value of Texture
----4 BYTES (FLOAT) - V Value of Texture

+ Code Snippet

Memblock-Mesh (32 Byte Header)
-Header
--4 BYTES (DWORD) Number Of Vertices
--4 BYTES (DWORD) Offset in Bytes to Vertice Data
--4 BYTES (DWORD) Number Of Normals
--4 BYTES (DWORD) Offset in Bytes to Normals Data
--4 BYTES (DWORD) Number of Faces
--4 BYTES (DWORD) Offset in Bytes to Face Data
--4 BYTES (DWORD) Size Of All Face Data
--4 BYTES (DWORD) Offset in Bytes to Texture UV Data
-Data
--Vertice Data
---For Each Vertex
----4 BYTES (FLOAT) - X Position of 3D Geometry
----4 BYTES (FLOAT) - Y Position of 3D Geometry
----4 BYTES (FLOAT) - Z Position of 3D Geometry
--Normals Data
---For Each Normal
----4 BYTES (FLOAT) - X Normalised Normal of 3D Geometry
----4 BYTES (FLOAT) - Y Normalised Normal of 3D Geometry
----4 BYTES (FLOAT) - Z Normalised Normal of 3D Geometry
--Face Data
---For Each Face (a face makes a polygon using A,B and C as vector points)
----2 BYTES (WORD) - Number of Vectors in Face (always use 3)
----2 BYTES (WORD) - Index to Vertex in Vertex Data for Vector A
----2 BYTES (WORD) - Index to Normal in Vertex Data for Vector A
----2 BYTES (WORD) - Index to Vertex in Vertex Data for Vector B
----2 BYTES (WORD) - Index to Normal in Vertex Data for Vector B
----2 BYTES (WORD) - Index to Vertex in Vertex Data for Vector C
----2 BYTES (WORD) - Index to Normal in Vertex Data for Vector C
--Texture Data
---For Each Vertex
----4 BYTES (FLOAT) - U Value of Texture
----4 BYTES (FLOAT) - V Value of Texture

Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?

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Vertex

22

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Joined: 21st Sep 2002

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Posted: 20th Feb 2003 18:17

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Hi!
Oh thx for this help!
I have the DBPro-Demo and in this help
stay no structure of this.
hmm the structure must be change becouse
the following code show me 338 Vertices
by a Cube

+ Code Snippet

Sync On : Sync Rate 0

Make Object Cube 1,12
Make Mesh From Object 1,1
Make Memblock From Mesh 1,1

MDW1 = Memblock DWord(1,0)
MDW2 = Memblock DWord(1,4)
MDW3 = Memblock DWord(1,8)
MDW4 = Memblock DWord(1,12)
MDW5 = Memblock DWord(1,16)
MDW6 = Memblock DWord(1,20)
MDW7 = Memblock DWord(1,24)
MDW8 = Memblock DWord(1,28)

Do
   Set Cursor 0,0
   Print MDW1
   Print MDW2
   Print MDW3
   Print MDW4
   Print MDW5
   Print MDW6
   Print MDW7
   Print MDW8
   Sync
Loop

cu olli

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Shadow Robert

22

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Joined: 22nd Sep 2002

Location: Hertfordshire, England

Posted: 20th Feb 2003 18:20

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lol... i got the info from the DarkBasic 1.1x manual (^_^)
if you ever need extra info or roughly howto produce effects its alot more useful than the current Pro manual.

hopefully within the next month or so that'll change with the new manual being written up

Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?

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DarkBASIC Discussion / Memblocks