void BLI_endian_switch_float_array(float *val, const int size) { if (size > 0) { int i = size; val = val + (size - 1); while (i--) { BLI_endian_switch_float(val--); } } }
static bool meshcache_read_mdd_range_from_time(FILE *fp, const int verts_tot, const float time, const float UNUSED(fps), float *r_frame, const char **err_str) { MDDHead mdd_head; int i; float f_time, f_time_prev = FLT_MAX; float frame; if (meshcache_read_mdd_head(fp, verts_tot, &mdd_head, err_str) == false) { return false; } for (i = 0; i < mdd_head.frame_tot; i++) { fread(&f_time, sizeof(float), 1, fp); #ifdef __LITTLE_ENDIAN__ BLI_endian_switch_float(&f_time); #endif if (f_time >= time) { break; } f_time_prev = f_time; } if (i == mdd_head.frame_tot) { frame = (float)(mdd_head.frame_tot - 1); } if (UNLIKELY(f_time_prev == FLT_MAX)) { frame = 0.0f; } else { const float range = f_time - f_time_prev; if (range <= FRAME_SNAP_EPS) { frame = (float)i; } else { frame = (float)(i - 1) + ((time - f_time_prev) / range); } } *r_frame = frame; return true; }
bool MOD_meshcache_read_mdd_index(FILE *fp, float (*vertexCos)[3], const int verts_tot, const int index, const float factor, const char **err_str) { MDDHead mdd_head; if (meshcache_read_mdd_head(fp, verts_tot, &mdd_head, err_str) == false) { return false; } if (fseek(fp, mdd_head.frame_tot * sizeof(int), SEEK_CUR) != 0) { *err_str = "Header seek failed"; return false; } if (fseek(fp, index * mdd_head.verts_tot * sizeof(float) * 3, SEEK_CUR) != 0) { *err_str = "Failed to seek frame"; return false; } if (factor >= 1.0f) { #if 1 float *vco = *vertexCos; unsigned int i; for (i = mdd_head.verts_tot; i != 0 ; i--, vco += 3) { fread(vco, sizeof(float) * 3, 1, fp); # ifdef __LITTLE_ENDIAN__ BLI_endian_switch_float(vco + 0); BLI_endian_switch_float(vco + 1); BLI_endian_switch_float(vco + 2); # endif /* __LITTLE_ENDIAN__ */ } #else /* no blending */ if (!fread(vertexCos, sizeof(float) * 3, mdd_head.verts_tot, f)) { *err_str = errno ? strerror(errno) : "Failed to read frame"; return false; } # ifdef __LITTLE_ENDIAN__ BLI_endian_switch_float_array(vertexCos[0], mdd_head.verts_tot * 3); # endif #endif } else { const float ifactor = 1.0f - factor; float *vco = *vertexCos; unsigned int i; for (i = mdd_head.verts_tot; i != 0 ; i--, vco += 3) { float tvec[3]; fread(tvec, sizeof(float) * 3, 1, fp); #ifdef __LITTLE_ENDIAN__ BLI_endian_switch_float(tvec + 0); BLI_endian_switch_float(tvec + 1); BLI_endian_switch_float(tvec + 2); #endif vco[0] = (vco[0] * ifactor) + (tvec[0] * factor); vco[1] = (vco[1] * ifactor) + (tvec[1] * factor); vco[2] = (vco[2] * ifactor) + (tvec[2] * factor); } } return true; }