checkerboard.cpp

Ray tracing on PS3, using the acceleration of PPU, No SPE acceleration is used. The code must be com

  vector float px_res, py_res, pz_res;
  px_res = py_res = pz_res =  _zero;
  vector unsigned int thisID;
  vector float matrix[16];

  //Do material1's matrix 
  splat_matrix4x4((vector float*)&matrix, &materials[id1].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id1));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  //Do material2's matrix 
  splat_matrix4x4((vector float*)&matrix, &materials[id2].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id2));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  //Do material3's matrix 
  splat_matrix4x4((vector float*)&matrix, &materials[id3].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id3));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  //Do material4's matrix
  splat_matrix4x4((vector float*)&matrix, &materials[id4].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id4));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  vector float sum = fabsf4(spu_add(floorf4(px_res), spu_add(floorf4(py_res), floorf4(pz_res))));
  vector unsigned int type_eq_checker = spu_cmpeq(spu_splats((unsigned int)MATERIAL_CHECKERBOARD), (vector unsigned int){(unsigned int)materials[id1].materialType, (unsigned int)materials[id2].materialType, (unsigned int)materials[id3].materialType, (unsigned int)materials[id4].materialType});
  vector unsigned int valid = spu_and(shadeBits, type_eq_checker);

  vector unsigned int mat1s = (vector unsigned int){materials[id1].arg1_i, materials[id2].arg1_i, materials[id3].arg1_i, materials[id4].arg1_i};
  vector unsigned int mat2s = (vector unsigned int){materials[id1].arg2_i, materials[id2].arg2_i, materials[id3].arg2_i, materials[id4].arg2_i};
  
  //vector unsigned int sum_zero = spu_cmpeq(_zero, fmodf4(sum, spu_splats(2.0f)));
  vector unsigned int sum_zero = spu_cmpgt(spu_splats(CHECKERBOARD_EPSILON), fmodf4(sum, spu_splats(2.0f)));  

  HitPacket newhp;
  newhp.materialID = spu_sel(mat1s, mat2s, sum_zero);
  newhp.materialID = spu_sel(spu_splats((unsigned int)0), newhp.materialID, valid);
  newhp.nx = hp.nx;
  newhp.ny = hp.ny;
  newhp.nz = hp.nz;
  newhp.t = hp.t;

  material_getReflectiveColor(materials, rgbp, newhp, p_x, p_y, p_z, valid);
  //printf("checkerboardReflective done\r\n");
  return;
}

MATERIAL_SHADER_TRANSPARENT(material_getCheckerboardTransparentColor) {
  vector float _zero = spu_splats(0.0f);
  
  union {
    vector unsigned int ids;
    struct {
      unsigned int id1, id2, id3, id4;
    };
  };
  ids = hp.materialID;
  
  vector float px_temp, py_temp, pz_temp, pw_temp;
  vector float px_res, py_res, pz_res;
  px_res = py_res = pz_res =  _zero;
  vector unsigned int thisID;
  vector float matrix[16];

  //Do material1's matrix 
  splat_matrix4x4((vector float*)&matrix, &materials[id1].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id1));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  //Do material2's matrix 
  splat_matrix4x4((vector float*)&matrix, &materials[id2].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id2));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  //Do material3's matrix 
  splat_matrix4x4((vector float*)&matrix, &materials[id3].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id3));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  //Do material4's matrix
  splat_matrix4x4((vector float*)&matrix, &materials[id4].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id4));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  vector float sum = fabsf4(spu_add(floorf4(px_res), spu_add(floorf4(py_res), floorf4(pz_res))));
  vector unsigned int type_eq_checker = spu_cmpeq(spu_splats((unsigned int)MATERIAL_CHECKERBOARD), (vector unsigned int){(unsigned int)materials[id1].materialType, (unsigned int)materials[id2].materialType, (unsigned int)materials[id3].materialType, (unsigned int)materials[id4].materialType});
  vector unsigned int valid = spu_and(shadeBits, type_eq_checker);

  vector unsigned int mat1s = (vector unsigned int){materials[id1].arg1_i, materials[id2].arg1_i, materials[id3].arg1_i, materials[id4].arg1_i};
  vector unsigned int mat2s = (vector unsigned int){materials[id1].arg2_i, materials[id2].arg2_i, materials[id3].arg2_i, materials[id4].arg2_i};
  
  //vector unsigned int sum_zero = spu_cmpeq(_zero, fmodf4(sum, spu_splats(2.0f)));
  vector unsigned int sum_zero = spu_cmpgt(spu_splats(CHECKERBOARD_EPSILON), fmodf4(sum, spu_splats(2.0f)));  

  HitPacket newhp;
  newhp.materialID = spu_sel(mat1s, mat2s, sum_zero);
  newhp.materialID = spu_sel(spu_splats((unsigned int)0), newhp.materialID, valid);
  newhp.nx = hp.nx;
  newhp.ny = hp.ny;
  newhp.nz = hp.nz;
  newhp.t = hp.t;

  material_getTransparentColor(materials, rgbp, newhp, p_x, p_y, p_z, valid);
  //printf("checkerboardTransparentColor done\r\n");
  return;
}

MATERIAL_SHADER_REFRACTIVE(material_getCheckerboardRefractiveIndex) {
  vector float _zero = spu_splats(0.0f);
  
  union {
    vector unsigned int ids;
    struct {
      unsigned int id1, id2, id3, id4;
    };
  };
  ids = hp.materialID;
  
  vector float px_temp, py_temp, pz_temp, pw_temp;
  vector float px_res, py_res, pz_res;
  px_res = py_res = pz_res =  _zero;
  vector unsigned int thisID;
  vector float matrix[16];

  //Do material1's matrix 
  splat_matrix4x4((vector float*)&matrix, &materials[id1].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id1));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  //Do material2's matrix 
  splat_matrix4x4((vector float*)&matrix, &materials[id2].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id2));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  //Do material3's matrix 
  splat_matrix4x4((vector float*)&matrix, &materials[id3].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id3));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  //Do material4's matrix
  splat_matrix4x4((vector float*)&matrix, &materials[id4].colorDSRT_r);
  xform_vec3_v(&px_temp, &py_temp, &pz_temp, &pw_temp, p_x, p_y, p_z, (vector float*)&matrix);
  thisID = spu_cmpeq(hp.materialID, spu_splats(id4));
  px_res = spu_sel(px_res, px_temp, thisID);
  py_res = spu_sel(py_res, py_temp, thisID);
  pz_res = spu_sel(pz_res, pz_temp, thisID);
  //pw_res = spu_sel(pw_res, pw_temp, thisID);

  vector float sum = fabsf4(spu_add(floorf4(px_res), spu_add(floorf4(py_res), floorf4(pz_res))));
  vector unsigned int type_eq_checker = spu_cmpeq(spu_splats((unsigned int)MATERIAL_CHECKERBOARD), (vector unsigned int){(unsigned int)materials[id1].materialType, (unsigned int)materials[id2].materialType, (unsigned int)materials[id3].materialType, (unsigned int)materials[id4].materialType});
  vector unsigned int valid = spu_and(shadeBits, type_eq_checker);

  vector unsigned int mat1s = (vector unsigned int){materials[id1].arg1_i, materials[id2].arg1_i, materials[id3].arg1_i, materials[id4].arg1_i};
  vector unsigned int mat2s = (vector unsigned int){materials[id1].arg2_i, materials[id2].arg2_i, materials[id3].arg2_i, materials[id4].arg2_i};
  
  //vector unsigned int sum_zero = spu_cmpeq(_zero, fmodf4(sum, spu_splats(2.0f)));
  vector unsigned int sum_zero = spu_cmpgt(spu_splats(CHECKERBOARD_EPSILON), fmodf4(sum, spu_splats(2.0f)));  

  HitPacket newhp;
  newhp.materialID = spu_sel(mat1s, mat2s, sum_zero);
  newhp.materialID = spu_sel(spu_splats((unsigned int)0), newhp.materialID, valid);
  newhp.nx = hp.nx;
  newhp.ny = hp.ny;
  newhp.nz = hp.nz;
  newhp.t = hp.t;

  material_getRefractiveIndex(materials, rindices, newhp, p_x, p_y, p_z, valid);
  //printf("getCheckerboardRefractiveIndex done\r\n");
  return;
}