G3P - The GPU General Graphing Project

[Drunkie]

Oh dear:

[Black Phoenix]

Okay, put it after Render.Start then

[Drunkie]

Okay, put it after Render.Start then

Nah, I got it working another way, I just moved around some things.



Here's the working code:

//==============================================================================
// 3D graph drawer
//==============================================================================

//Must divide by each other, or else it'll fuck up big time
define WIDTH,50;
define TRIS_IN_FRAME,10;
define HEIGHT,50;

mov #regHWClear,0;
mov EDX,HEIGHT; mul EDX,WIDTH; div EDX,TRIS_IN_FRAME;
cmp #Frame,EDX; jge @DrawExit; jmp Render.Start;
@DrawExit: dexit;

Render.Start:
cmp #Frame,0; jne Render.SkipInitialization;
  dclrscr cBackgroundColor;
  //Apply aspect ratio correction
  mov #vPerspective.Y,1.6;
  //Initialize perspective transform matrix
  mperspective mProjectionMatrix,vPerspective;

Render.SkipInitialization:
  dcvxpipe 3; //Set -1..1 coordinate system
  dvxpipe  5; //Use matrix projection routine
  call ApplyTransform;
  dcolor cDefaultColor;
  mloadproj mProjectionMatrix;
  dsetlight 0,lSun;//vPerspective

  denable 0; //Vertex buffer
  denable 2; //Lighting



  mov EDX,WIDTH;
  div EDX,TRIS_IN_FRAME;

  //set coordinates
  mov EBX,#Frame; div EBX,EDX; fint EBX;
  mov EAX,#Frame; mod EAX,EDX; fint EAX; mul EAX,TRIS_IN_FRAME;

  //draw triangle stripe
  mov EDX,TRIS_IN_FRAME;
  @DrawLoop:
    call DrawTriangle;
    inc EAX;
    loopd @DrawLoop;
  dvxflush;

  inc #Frame;
dexit;


  


//= Apply transformations ======================================================
ApplyTransform:
  //Compute look-at matrix (for camera)
  mlookat mViewMatrix,vLookAt;

  //Rotate & translate target model
  mrotate mRotateMatrix,vRotate;
  mtranslate mTranslateMatrix,vTranslate;
  mscale mScaleMatrix,vScale;

  //Create Model matrix
  mmov mModelMatrix,mRotateMatrix;
  mmul mModelMatrix,mTranslateMatrix;
  mmul mModelMatrix,mScaleMatrix;

  //Compute and load ModelView matrix
  mmov mModelViewMatrix,mViewMatrix;
  mmul mModelViewMatrix,mModelMatrix;
  mload mModelViewMatrix;
ret

//EAX: X, EBX: Y, Z -> ECX
GenerateHeight:
  push eax; push ebx;
    add EAX,#vTranslate.X;
    add EBX,#vTranslate.Y;

    mul EAX,EAX;
    mul EBX,EBX;
    add EAX,EBX; mul EAX,0.5;
    fpwr EAX,0.5;
    add EAX,0.1;

    fsin ECX,EAX;
    div ECX,EAX;
    mul ECX,10;
//    fsin EAX,EAX;
//    fcos ECX,EBX;
//    mul ECX,EAX;

    //Z = Sin(R) / R
  pop ebx; pop eax;
ret

DrawTriangle:
  mov EBP,VertexData;

  //Face 1
  call GenerateHeight;
  mov #EBP,EAX; inc EBP;
  mov #EBP,EBX; inc EBP;
  mov #EBP,ECX; inc EBP;

  inc EAX;
  call GenerateHeight;
  mov #EBP,EAX; inc EBP;
  mov #EBP,EBX; inc EBP;
  mov #EBP,ECX; inc EBP;

  inc EBX;
  call GenerateHeight;
  mov #EBP,EAX; inc EBP;
  mov #EBP,EBX; inc EBP;
  mov #EBP,ECX; inc EBP;

  //Face 2
  dec EBX; dec EAX;
  call GenerateHeight;
  mov #EBP,EAX; inc EBP;
  mov #EBP,EBX; inc EBP;
  mov #EBP,ECX; inc EBP;

  inc EBX; inc EAX;
  call GenerateHeight;
  mov #EBP,EAX; inc EBP;
  mov #EBP,EBX; inc EBP;
  mov #EBP,ECX; inc EBP;

  dec EAX;
  call GenerateHeight;
  mov #EBP,EAX; inc EBP;
  mov #EBP,EBX; inc EBP;
  mov #EBP,ECX; inc EBP;
  dec EBX;

  dvxdata_3f VertexData,2;
ret

//= Rendering settings and parameters ==========================================
matrix mRotateMatrix;       matrix mTranslateMatrix;    matrix mScaleMatrix;
matrix mProjectionMatrix;   matrix mViewMatrix;         matrix mModelMatrix;
matrix mPRotateMatrix;      matrix mPTranslateMatrix;   matrix mModelViewMatrix;
//------------------------------------------------------------------------------

vector4f vRotate,         0,    0,    1,    0; //<AXIS X Y Z> <ANGLE W>
vector4f vTranslate,     -25,  -25,    0,    0; //<TRANLSATION X Y Z> <0>
vector4f vScale,          1,    1,    1,    0; //<SCALE X Y Z> <0>
vector4f vPerspective,   30,  1.6,    1,   20; //<FOV> <ASPECT RATIO> <ZNEAR> <ZFAR>

vLookAt: vector3f vLookAt_Eye,     20,  20,  30; //Where our camera is
         vector3f vLookAt_Center,   0,   0,   0; //What we look at
         vector3f vLookAt_Up,       0,   0,  -1; //Where our head points

color cBackgroundColor,     0,   0,   0;
color cDefaultColor,      255, 255, 255;

alloc Frame;

lSun: vector4f Sun.Pos, 100, 100, 100,   0; //x y z <unused, will be falloff>
      color    Sun.Col, 255, 255, 255, 0.5; //R G B Brightness
//==============================================================================

VertexData:
  db 0,0,0; //Face1
  db 0,0,0;
  db 0,0,0;
  db 0,0,0; //Face2
  db 0,0,0;
  db 0,0,0;

[Black Phoenix]

Yeah, it's a bug I just found, didn't get to fixing it yet (it doesn't set default texture for some reason). Or rather it sets default texture for no reason, it shouldn't

[Drunkie]

You still working on this? Any progress?

[Magos Mechanicus]

Sorry, it's basically been at a standstill for a while. Spring came and there was suddenly a lot more work to do around the house, and my GPU skills proved to be even worse than I remembered.