----------------------------------------------------------------------

Date: Wed, 2 Jul 1997 18:53:35 -0400 (EDT)

Subject: Another D2 BSTONE change

Please make the following change to the texture callback declaration.

The two changes are

1. the lpD3DRMTex should be a var (*IDirect3DRMTexture).

2. Calling convention is CDECL.

D3DRMLOADTEXTURECALLBACK = function ( tex_name: PChar ; lpArg: Pointer ;

var lpD3DRMTex: IDirect3DRMTexture ): HRESULT ; CDECL;

I just used this callback, but the others seem to have the same issue. The

others still need to be verified and changed.

Can Someone please post the ftp info for logging changes to the blake stone

includes and I'll upload this.

Cheers, Jodi.

Technical Director, Partner

Digital Machine Interactive Inc.

Toronto, ON Canada

[v] (416) 406-1162

[f] (416) 766-4796

[c] (416) 720-9981

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Date: Wed, 2 Jul 1997 17:22:29 -0700

Subject: [ADMIN] Sorry for the mass mailing :)

Hi,

My ISP decided to change the software running our list. As you might

already be aware, we ran into a problem and one message was send

repeatedly. Basically the main list was on the digest's list. This

problem has been fixed. On a positive note, things should run more

smoothly.

Again my apologies,

Daniel Spiess

------------------------------

Date: Thu, 3 Jul 1997 12:17:16 -0400

Subject: [delphi-3d] How to get angles for glRotate?

How can I derive the angles needed to pass into glRotate (I'm using OpenG=

L)

from an object's direction and up (and possibly, right) vectors? (These

vectors are unit vectors relative to the object's origin). Once I know t=

he

angles of rotation around the x, y and z (global) axes I would use

something like:

glRotatef(xRot, 1.0, 0.0, 0.0);

glRotatef(yRot, 0.0, 1.0, 0.0);

glRotatef(zRot, 0.0, 0.0, 1.0);

Note that the 3 vectors (direction, up, right) are being pulled out of th=

e

top 3x3 sub-matrix of a 4x4 transformation matrix that is updated (and

re-normalized/re-orthoganilized) whenever the object changes direction bu=

t

if I try using the whole (4x4) matrix directly by calling glMultMatrix or=

glLoadMatrix the object still rotates around the global x, y, z axes

instead of around its local axes.

I've got to the point where the view looks correct whenever the camera is=

moved or rotated (I use the position and the direction and up vectors wit=

h

gluLookAt) but not for objects in the scene...

TIA, Dean

------------------------------

Date: Thu, 3 Jul 1997 19:42:14 +0200

Subject: [delphi-3d] How to play large audio files using DirectSound ?

Dear Delphi Freaks,

I'm writing an application using Delphi3 which need to play large (40MB)

audio files from CDrom. I have a simple DirectSound wrapper in Delphi to

play&mix sounds in Delphi,

but this code only works if the complete wavefile is loaded into RAM.

Since not everybody has 64 MB of RAM, does anybody have some example code

to play WAVfiles from a stream using Delphi3 and DirectSound ?

Thanks in advance,

------------------------------

Date: Thu, 3 Jul 1997 11:57:01 -0700

Subject: [delphi-3d] Anyone have troubles with ID3DRMMeshBuilder.GetVertices?

Hi,

I am trying to copy a mesh into another mesh, and I am having troubles with

the GetVertices/Addfaces methods. In the new meshbuilder, I am getting the

correct number of vertices but the incorrect number of faces. I am copying

the mesh the following way :

// the arrays are

PVectorArray = ^TVectorArray; // dynamic vector array

TVectorArray = Array[0..2048] of D3DVECTOR;

PDWordArray = ^TDWordArray; // dynamic dword array

TDWordArray = Array[0..2048] of DWORD;

// Initialize everything

FaceArray := nil;

Vertices := nil;

Normals := nil;

FaceData := nil;

VCount := 0;

NCount := 0;

FaceSize := 0;

// Get Counts

DXCheck(SourceMesh.GetVertices(Vcount, Vertices^[0], NCount,

Normals^[0],

FaceSize, FaceData^[0]));

// Allocate Space

GetMem(Vertices, SizeOf(D3DVECTOR) * VCount);

GetMem(Normals, SizeOf(D3DVECTOR) * NCount);

GetMem(FaceData, SizeOf(DWORD) * FaceSize);

// Get info

DXCheck(SourceMesh.GetVertices(Vcount, Vertices^[0], NCount,

Normals^[0],

FaceSize, FaceData^[0]));

// Copy info to new mesh

DXCheck(DestMesh.ReserveSpace(VCount, NCount, FaceSize));

DXCheck(DestMesh.AddFaces(VCount, Vertices^[0], 0, Normals^[0],

FaceData^[0], FaceArray));

For example, when I copy a cube I get 8 vertices and 3 faces. For a flat

face, I get 8 vertices and 3 faces. A sphere seems to have 296 vertices

and 4 faces. Is GetVertices buggy? I know AddFaces is working, however I

never actually got it to work when I passed the normals. I always left

that blank.

Thanks for any help (I'm really stumped!)

Daniel Spiess

------------------------------

Date: Thu, 3 Jul 1997 22:02:35 +0200

Subject: [delphi-3d] What about shading strategies

Hi,

Oh, at last... my engine is starting to look decent. The perspective =

correct

texture mapper works fine (again, multitudes of thanks to Romesh for =

pointing

me in the right direction). I have now added a unit for palette =

processing and

calculation of shading tables. I have also added one programmer to the =

team now,

because we are running out of time...

We are running in 8bit color and implemented the usual 256 by 256 byte =

lookup

table indexed with shading value and palette index to quickly find the =

closest matching=20

palette entry to a shaded pixel. First we used solely RGB color model to =

calculate

the shaded colors, then looking them up in the palette. Now we have =

implemented

a HSV model as well, tweaking the V-value according to the shading =

value, then=20

converting back to RGB and then look it up in the palette. This looks =

quite good,=20

especially when "darkening" scenes. We have done test scenes with =

brightly drawn

textures that are mostly darkened during shading, and it works fine. I =

have skimmed

internet and a lot of Graphics literature (i do not have 'the Zen =

of...') But as far as I

can see there is a million approaches to shading the scenes and picking =

the right

colors (as for realistic "over exposure" etc) I wonder if anyone has any =

pointers toward

optically/perceptually realistic color models and eventually not so =

realistic but rather

cool shading effects.

Yours sincerely,

Simen

- --------------------------------------------------------------

Medieoperat=F8rene as; Nedre vaskegang 6; N-0186 Oslo; Norway

mob:+47 90 77 90 24; tlf: +47 22 20 64 20; fax: +47 22 20 64 21

- --------

------------------------------

Date: Fri, 4 Jul 1997 11:24:46 +0200

Subject: [delphi-3d] How to play large audiofiles using DirectSound, part 2

Sorry I forgot to mention that my app needs to load lots of hires photo's

while music is playing, so I can't use CD audio tracks, it must be samples.

Thanks for respons, but I hope to find some code I can use to play large

audio files using streams.

- --------

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End of delphi-3d-digest V1 #1