diff options
Diffstat (limited to 'source/blender/render/intern/source/render_texture.c')
| -rw-r--r-- | source/blender/render/intern/source/render_texture.c | 41 |
1 files changed, 30 insertions, 11 deletions
diff --git a/source/blender/render/intern/source/render_texture.c b/source/blender/render/intern/source/render_texture.c index ef1b1cd159c..a4c1778c624 100644 --- a/source/blender/render/intern/source/render_texture.c +++ b/source/blender/render/intern/source/render_texture.c @@ -1905,11 +1905,13 @@ static int ntap_bump_compute(NTapBump *ntap_bump, ShadeInput *shi, MTex *mtex, T const int fromrgb = ((tex->type == TEX_IMAGE) || ((tex->flag & TEX_COLORBAND)!=0)); float Hscale = Tnor*mtex->norfac; + int dimx=512, dimy=512; // 2 channels for 2D texture and 3 for 3D textures. const int nr_channels = (mtex->texco == TEXCO_UV)? 2 : 3; int c, rgbnor, iBumpSpace; float dHdx, dHdy; + int found_deriv_map = (tex->type==TEX_IMAGE) && (tex->imaflag & TEX_DERIVATIVEMAP); // disable internal bump eval in sampler, save pointer float *nvec = texres->nor; @@ -1929,8 +1931,31 @@ static int ntap_bump_compute(NTapBump *ntap_bump, ShadeInput *shi, MTex *mtex, T ntap_bump->init_done = 1; } + + // resolve image dimensions + if(found_deriv_map || (mtex->texflag&MTEX_BUMP_TEXTURESPACE)!=0) { + ImBuf* ibuf = BKE_image_get_ibuf(tex->ima, &tex->iuser); + if (ibuf) { + dimx = ibuf->x; + dimy = ibuf->y; + } + } - if(!(mtex->texflag & MTEX_5TAP_BUMP)) { + if(found_deriv_map) { + float dBdu, dBdv; + float s = 1; // negate this if flipped texture coordinate + texco_mapping(shi, tex, mtex, co, dx, dy, texvec, dxt, dyt); + rgbnor = multitex_mtex(shi, mtex, texvec, dxt, dyt, texres); + + // this variant using a derivative map is described here + // http://mmikkelsen3d.blogspot.com/2011/07/derivative-maps.html + dBdu = Hscale*dimx*(2*texres->tr-1); + dBdv = Hscale*dimy*(2*texres->tg-1); + + dHdx = dBdu*dxt[0] + s * dBdv*dxt[1]; + dHdy = dBdu*dyt[0] + s * dBdv*dyt[1]; + } + else if(!(mtex->texflag & MTEX_5TAP_BUMP)) { // compute height derivatives with respect to output image pixel coordinates x and y float STll[3], STlr[3], STul[3]; float Hll, Hlr, Hul; @@ -2084,15 +2109,8 @@ static int ntap_bump_compute(NTapBump *ntap_bump, ShadeInput *shi, MTex *mtex, T if( mtex->texflag & MTEX_BUMP_TEXTURESPACE ) { if(tex->ima) { - float vec[2]; - int dimx=512, dimy=512; - ImBuf* ibuf = BKE_image_get_ibuf(tex->ima, &tex->iuser); - if (ibuf) { - dimx = ibuf->x; - dimy = ibuf->y; - } - // crazy hack solution that gives results similar to normal mapping - part 2 + float vec[2]; vec[0] = dimx*dxt[0]; vec[1] = dimy*dxt[1]; @@ -2126,7 +2144,7 @@ void do_material_tex(ShadeInput *shi) float texvec[3], dxt[3], dyt[3], tempvec[3], norvec[3], warpvec[3]={0.0f, 0.0f, 0.0f}, Tnor=1.0; int tex_nr, rgbnor= 0, warpdone=0; int use_compat_bump = 0, use_ntap_bump = 0; - int found_nmapping = 0; + int found_nmapping = 0, found_deriv_map = 0; int iFirstTimeNMap=1; compatible_bump_init(&compat_bump); @@ -2146,8 +2164,9 @@ void do_material_tex(ShadeInput *shi) tex= mtex->tex; if(tex==0) continue; + found_deriv_map = (tex->type==TEX_IMAGE) && (tex->imaflag & TEX_DERIVATIVEMAP); use_compat_bump= (mtex->texflag & MTEX_COMPAT_BUMP); - use_ntap_bump= (mtex->texflag & (MTEX_3TAP_BUMP|MTEX_5TAP_BUMP)); + use_ntap_bump= ((mtex->texflag & (MTEX_3TAP_BUMP|MTEX_5TAP_BUMP))!=0 || found_deriv_map!=0) ? 1 : 0; /* XXX texture node trees don't work for this yet */ if(tex->nodetree && tex->use_nodes) { |