rendering in gameworld

[mnbvc]

i'm trying to render a simple vertex in wows gameworld
that's my code:

		D3DTLVERTEX vertices[] =
		{
			{ 0.0f, 0.0f, 0.0f, 1.0f, 0xAA00ff00 },
			{ 0.0f, 200.0f, 0.0f, 1.0f, 0xff0000ff },
			{ 200.0f, 0.0f, 0.0f, 1.0f, 0xffff0000 }
		};

		pDevice->SetVertexShader(NULL);
		pDevice->SetPixelShader(NULL);

		D3DXMATRIX World;
		D3DXMatrixIdentity(&World);

		D3DXMatrixTranslation(&World, *Localplayer.X, *Localplayer.Y, *Localplayer.Z);

		pDevice->SetTransform(D3DTS_WORLD, &World);

		pDevice->SetFVF(D3DFVF_TL);
		pDevice->SetTexture(0, NULL);

		pDevice->DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, 1, &vertices[0], sizeof(vertices[0]));

but pDevice->SetTransform(D3DTS_WORLD, &World); has no effect on how the vertex is drawn, the result just looks like this:


i checked the world matrix at the end of my code:
pDevice->GetTransform(D3DTS_WORLD, &World);
content of the variable:

1 0 0 0
0 1 0 0
0 0 1 0
-6221.15 329.721 383.208 1

which is ok

maybe somebody here can tell me why the vertex position isn't translated

[Kryso]

You need to set also view and projection matricies

(3.3.0 version, mostly "stolen" from other topics here)

Vector3 camera = new Vector3( ( float* )pActiveCamera + 2 );
float zNearPlane = *( ( float* )pActiveCamera + 14 );
float zFarPlane = *( ( float* )pActiveCamera + 15 );
float fieldOfView = *( ( float* )pActiveCamera + 16 );
float aspect = *( ( float* )pActiveCamera + 17 );

lookAt = lookAt + new Vector3( 0, 0, *( ( float* )pActiveCamera + 74 ) );

Matrix view = Matrix.LookAtRH( camera, lookAt, new Vector3( 0, 0, 1f ) );
Matrix projection = Matrix.PerspectiveFovRH( fieldOfView * 0.6f, aspect, zNearPlane, zFarPlane );

device.SetTransform( D3DTransformStateType.VIEW, &view );
device.SetTransform( D3DTransformStateType.PROJECTION, &projection );

[mnbvc]

i already tried this, doesn't help anything

in my understanding the view und projection matrix is only needed for world to screen conversion, though it doesn't matter when drawing an object into world space

[Kryso]

No you still need to set view and projection matrices - I think wow uses shaders for this stuff so you need to set it by yourself (correct me if I'm wrong, I'm not exactly expert in d3d stuff). Also now I noticed you are using D3DFVF_XYZRHW.. thats for 2D IIRC and for world rendering you need to use D3DFVF_XYZ.

http://dl.dropbox.com/u/1799304/Mmow...510_122100.jpg

[mnbvc]

correct, that's the reason why the vertex was where it was, silly mistake :P

but now i have the problem that the vertex is just not visible, this should be similar to yours at the gnome starting point:

		struct Vertex
		{
			float x, y, z;
			DWORD color;
		};

		Vertex vertices[] =
		{
			{ 0.0f, 0.0f, 5.0f, 0xff00ff00 },
			{ 5.0f, 0.0f, 0.0f, 0xff0000ff },
			{ -5.0f, 0.0f, 0.0f, 0xffff0000 }
		};

		pDevice->SetVertexShader(NULL);
		pDevice->SetPixelShader(NULL);

		D3DXMATRIX World, View, Proj;
		D3DXMatrixIdentity(&World);
		ViewMatrix(&View);
		ProjectionMatrix(&Proj);

		D3DXMatrixTranslation(&World, -6225.297f, 332.9926f, 383.205f);

		pDevice->SetTransform(D3DTS_WORLD, &World);
		pDevice->SetTransform(D3DTS_VIEW, &View);
		pDevice->SetTransform(D3DTS_PROJECTION, &Proj);

		pDevice->SetFVF(D3DFVF_XYZ | D3DFVF_DIFFUSE);
		pDevice->SetTexture(0, NULL);
		
		pDevice->DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, 1, &vertices[0], sizeof(&vertices[0]));

i tried setting cullmode to none and disabling the zbuffer, but it's still not visible
my view und projection matrices are ok, they work fine with world to screen
and before anybody asks: i checked this from both sides, it's not because the backface isn't rendered

[Kryso]

to see things:
device.Clear( 0, null, D3DClearFlags.ZBUFFER, Colors.White, 1, 0 );

to see colored things:
device.SetRenderState( D3DRenderStateType.AMBIENT, 0xff7f7f7f );
device.SetRenderState( D3DRenderStateType.LIGHTING, 1 );

[mnbvc]

i tried it: pDevice->Clear(0, NULL, D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(255,255,255), 1, 0);

but it's still not visible

isn't clearing the zbuffer anyway the next step wow does after the endscene hook fcuntion is done and though it's needless that we call it?

[Kryso]

Oh yes, my fail - I had to clear zbuffer because I wanted it to work at least on things I draw. When I didn't clear zbuffer everything I drew appeared behind game world. Anyway I have no idea what is wrong. I tried to do same things as you:

device.SetVertexShader( null );
device.SetPixelShader( null );

// TODO: create wrapper for camera
float* pActiveCamera = Pointers.ActiveCamera;

Vector3 camera = new Vector3( pActiveCamera + 2 );
float zNearPlane = *( pActiveCamera + 14 );
float zFarPlane = *( pActiveCamera + 15 );
float fieldOfView = *( pActiveCamera + 16 );
float aspect = *( pActiveCamera + 17 );

lookAt = lookAt + new Vector3( 0, 0, *( pActiveCamera + 74 ) );

Matrix view = Matrix.LookAtRH( camera, lookAt, new Vector3( 0, 0, 1f ) );
Matrix projection = Matrix.PerspectiveFovRH( fieldOfView * 0.6f, aspect, zNearPlane, zFarPlane );

device.SetTransform( D3DTransformStateType.VIEW, &view );
device.SetTransform( D3DTransformStateType.PROJECTION, &projection );

public unsafe void SetTarget( Vector3 vector, float yaw = 0, float pitch = 0, float roll = 0 ) {
    Matrix worldMatrix = Matrix.Translation( vector ) * Matrix.RotationYawPitchRoll( yaw, pitch, roll );

    device.SetTransform( ( D3DTransformStateType )256, &worldMatrix );
}

public unsafe void DrawTriangles( params Triangle[] triangles ) {
    device.SetFVF( D3DFVF.XYZ /*| D3DFVF.NORMAL*/ | D3DFVF.DIFFUSE );
    device.SetTexture( 0, null );

    fixed ( Triangle* pBuffer = triangles )
        device.DrawPrimitiveUP( D3DPrimitiveType.TRIANGLESTRIP, ( uint )triangles.Length, pBuffer, ( uint )sizeof( Vertex ) );
}

[Name( "Triangle test" )]
class TriangleTest( IScript ):
	def constructor():
		self._triangles = (
				Triangle( Vector3( 0.0f, 0.0f, 5.0f ), Colors.Green, Vector3( 0.0f, 0.0f, 0.0f ), Colors.Blue, Vector3( -5.0f, 0.0f, 0.0f ), Colors.Red ),
			);
			
	private _triangles as (Triangle)
		
	def Tick():
		graphics = Direct3D.Graphics;
		//graphics.SetTarget( ObjectManager.Player.Target.Position, 0, 0, 0 );
		graphics.SetTarget( Vector3( -6225.297f, 332.9926f, 383.205f ), 0, 0, 0 );
		graphics.DrawTriangles( *self._triangles );

And result: http://dl.dropbox.com/u/1799304/Mmow...510_170241.jpg

And with lightning

device.SetRenderState( D3DRenderStateType.AMBIENT, 0xff7f7f7f );
device.SetRenderState( D3DRenderStateType.LIGHTING, 1 );

http://dl.dropbox.com/u/1799304/Mmow...510_170349.jpg

[mnbvc]

ok, the problem was: zNearPlane and zFarPlane in my projection matrix
well, i'm now taking the values from the camera struct like you and it's fine
can it be that your rotation and scale is messed up? because i think mine is ok now

tada:


but there is still a problem:


objects like this tree, or players are rendered behind the triangle, does anybody know how to solve this? :P


btw, the second value here is really strange:
pDevice->DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, (sizeof(vertices)/16)-1, &vertices[0], sizeof(Vertex));

if i have 3 vertices in my array i can set this to 1 or 2, all 3 will be rendered. if i set this to 3, it is expecting a 4th vertex to render, and so the end of my triangle has a visible error.
if i have 4 vertices in the array and i set this to 1 or 2 only the first 3 of them are rendered but are looking fine
for all 4 vertices i have to set this to 3
(correct number seems to be numberofvertices-1)

[Kryso]

Nah, I just have different second vertex

Triangle( Vector3( 0.0f, 0.0f, 5.0f ), Colors.Green, Vector3( 0.0f, 0.0f, 0.0f ), Colors.Blue, Vector3( -5.0f, 0.0f, 0.0f ), Colors.Red )

And about the size.. I think it should be something like that
trianglelist -> sizeof( vertices ) / ( sizeof( Vertex ) * 3 )
trianglestrip and trianglefan -> sizeof( vertices ) / sizeof( Vertex ) - 2

[Harland]

objects like this tree, or players are rendered behind the triangle, does anybody know how to solve this? :P

Did you happen to have any luck solving this pickle? I know I haven't yet

[MaiN]

Did you happen to have any luck solving this pickle? I know I haven't yet

You have to manually take care of the depth buffer.

[Harland]

Ah okay I'll look into that one. Cheers main.

[mnbvc]

what i found out so far is that this has to be set, but i guess it's enabled anyway by wow:
pDevice->SetRenderState(D3DRS_ZENABLE, D3DZB_TRUE);
pDevice->SetRenderState(D3DRS_ZWRITEENABLE, TRUE);
pDevice->SetRenderState(D3DRS_ZFUNC, D3DCMP_LESSEQUAL);
and the other thing we can do is to clear the zbuffer
but it didn't change anything for me
can you give any further info about this?

[Kryso]

/solved

D3DViewport viewport = new D3DViewport();
viewport.Position = Point.Zero;
viewport.Size = new Point( 1920, 1200 );
viewport.MinZ = 0;
viewport.MaxZ = 0.94f;

device.SetViewport( viewport );

device.SetRenderState( D3DRenderStateType.ZENABLE, 1 );
device.SetRenderState( D3DRenderStateType.ZWRITEENABLE, 1 );
device.SetRenderState( D3DRenderStateType.ZFUNC, 4 );

http://dl.dropbox.com/u/1799304/Mmowned/zbuffer.jpg

It's still drawing over user interface and effects, but it's start