ASM Community

Hi
I am trying to getting started rendering textures in d3d9, but it only shows a white quad
is it wrong textureflags?somethings missing for making textures enabled?
I am looking at scrontys testing.asm for howto
does it maybe take different flags for taking a .dds which includes 11 levels of mip/mapping?
first I want to get this right
after that I want to change it to work with createtexturefrommemory

Magnus

Afternoon, daydreamer.

What do you have as data for the vertex buffer?
Remember: It will nolonger have colour values, and will now have texture tu/tv values.

When rendering, do you SetTexture?

Are you loading the texture? Is the Load call failing?

Cheers,
Scronty

You need to set a View in 3D.
Take a look at the api functions D3DXMatrixLookAtLH and D3DXMatrixPerspectiveFovLH, or just dig around for a procedure called "SetupMatrices", which sets up a fixed 3D camera view using those functions.

You only need to setup the Perspective once.
To implement the simplest kind of realtime camera, you need to call the LookAt function once for every time you "camera" moves or rotates (ie whenever the "camera view" has changed.

Your camera is by default (no Lookat call) located at 0,0,0 and looking into Z.
Just setting up the Perspective should be enough to make the texture scale with Z values.
I just thought I'd waffle a bit to give you some stuff to play with..

Here's a procedure originally by Scronty.
Bear in mind everything I said in my last post, as this example is designed to be called EVERY FRAME, ie from the Render code. You could do better with the information in my last post.
However, it does show clearly how to setup all those nasty matrices.
Don't be afraid of matrices, we don't need to mess with them often, when we do we usually use some kind of procedure to do it, so just think of them as big structs, with either 4x4 or 3x3 FLOATs in them.

;---------------------------------------------------------------------------------------------------------------------
; Name: SetupMatrices
; Desc: Sets up the world, view, and projection transformation matrices.
;-----------------------------------------------------------------------------------------------------------------------
SetupMatrices PROC
LOCAL tmpmatrix:D3DMATRIX
LOCAL tmpmatrix2:D3DMATRIX
LOCAL matWorld:D3DMATRIX
LOCAL matView:D3DMATRIX
LOCAL matProj:D3DMATRIX
    
.DATA
    fpField_of_View             FLOAT     0.7853981635f                             ;( roughly PI / 4 = roughly 90 degree fov )
    fpAspect_Ratio              FLOAT     1.0f                                               ;Like art apps, 1:1 aspect ratio = noresize
    fpNear_Clipping_Plane       FLOAT     1.0f                                          ;Anything closer to the cam than this is clipped
    fpFar_Clipping_Plane        FLOAT     100.0f                                       ;Anything further away than this is clipped

    cam_vector                     D3DXVECTOR3     <0.0f, 3.0f,-15.0f>          ;Cam is currently located HERE in 3D space
    lookat_vector                 D3DXVECTOR3     <0.0f, 0.0f, 0.0f>             ;Cam is looking @ this point in 3D space
    world_UP_vector           D3DXVECTOR3     <0.0f, 1.0f, 0.0f>             ;UP vector is (0,0,0) --> (0,1,0) = +Y

    fptGTms             FLOAT       0.0f                                                         ;"The Time"
    fptGTms2            FLOAT       0.0f                                                        ;"The Time / 3"
    
    fptGTmsDivBy        FLOAT       1000.0f
    fptGTmsDivBy2        FLOAT      3.0f
    fptGTmsDivBy3        FLOAT      6.0f

    fpmine              FLOAT       15.0f
    fp2pt0              FLOAT       2.0f
    
    rlNeg2pt0           REAL4       -2.0f
    rl0pt2              REAL4       0.2f                     ;   This is half of the mesh-fonts' Extrusion
    fptemp              FLOAT       0.0f
    temp                DWORD       0


.CODE
    invoke DXUtil_Timer, TIMER_GETAPPTIME
    fst fTime    
    fst fptGTms
    fdiv fptGTmsDivBy2
    fstp fptGTms2

    
;========================================================================================
; Perform the World Transformation (translate, rotate, and / or scale the entire universe
; Rotate the text in the middle - uses negated result of Bounding Sphere to center text.
;========================================================================================
    invoke D3DXMatrixIdentity,addr matWorld
    invoke D3DXMatrixTranslation, addr matWorld, vCenter.x, fp0, rl0pt2
    invoke D3DXMatrixRotationX, addr tmpmatrix, fptGTms
    invoke D3DXMatrixRotationY, addr tmpmatrix2, fptGTms2
    invoke D3DXMatrixMultiply, addr matWorld, addr matWorld, addr tmpmatrix
    invoke D3DXMatrixMultiply, addr matWorld, addr matWorld, addr tmpmatrix2
    mcall ,IDirect3DDevice8_SetTransform, 256, addr matWorld
;========================================================================================    


     fld  fptGTms                               ;Make the cam move up and down a lil with Time
     fdiv fRadius
     mov temp,5
     fimul temp
     fsincos                 ;sinf(timeGetTime()/350.0f)) 
     fstp fptemp     
     fstp cam_vector.y
     invoke D3DXVec3Normalize, addr cam_vector, addr cam_vector
     
     fld fp0                                                            ;Move the cam back in Z so we can see better
     fsub fptGTmsDivBy3
     fsub fRadius
     fstp cam_vector.z

;========================================================================================
;Perform the View Transformation (rotate everything to suit the cam orientation)
;========================================================================================
    invoke D3DXMatrixLookAtLH, addr matView, addr cam_vector, addr lookat_vector, addr world_UP_vector
    mcall ,IDirect3DDevice8_SetTransform, D3DTS_VIEW, addr matView
;========================================================================================   
;Perform the Projection Transformation (scale things in x and y based on z , = perspective)
;========================================================================================
    invoke D3DXMatrixPerspectiveFovLH, addr matProj, fpField_of_View, fpAspect_Ratio, \
                                        fpNear_Clipping_Plane, fpFar_Clipping_Plane
    mcall ,IDirect3DDevice8_SetTransform, D3DTS_PROJECTION, addr matProj
;========================================================================================    
    ret
SetupMatrices ENDP

I hope that stuff helps you, and that you push ahead and get past this hurdle, as it's only a psychological barrier, since you're not used to dealing with matrices, they are new, so they are scary. They don't have to be.

It looks pretty much right.
TriangleStrips need to be constructed carefully, the vertex order is critical.
The Camera shouldn't be at -150 unless you have geometry there.
Try moving the camera position (hey, why not add keyboard controls to move it)
and also try rendering just a single triangle first.
Try disabling lighting, even though you have no lights.
I seem to remember that under Direct3D you need to set up a Material regardless, and that it needs to have ambient=1.0f, 1.0f, 1.0f, 1.0f but I'm only going from memory.
If NONE of that helps, I can post some working code, and you can find the difference yourself.
At this point, it's something really small.

hello daydreamer

You're outside the "Field of view" so your geometry isn't visible.
Keep your cam_vector.z below -100 (now it's -150) so it's in the Fov

? ? fpFar_Clipping_Plane? ? FLOAT 100.0f
? ? cam_vector? ? ? D3DXVECTOR3? <0.0f,0.0f,-50.f> ;move camera 50 back on the Z
? ? lookat_vector? ?D3DXVECTOR3? <0.0f,0.0f,0.0f>? ;look at the center of? Fov

Now your geometry must be visible.

Post it all somewhere and I'll take a look :)

I can't see it .. maybe I'm looking in the wrong place?