Blender模型导入插件io-import-nr

# For Noesis # Return bytes() object def unpackVertexComponentAsBytes(vert, vertexData, va): vertBaseOffs = 0 fmt = va.getFormat() res = bytes() for idx in range(0, vert.getVertexCount()): vertDataOffs = vertBaseOffs + va.offs p = struct.unpack_from(fmt, vertexData, vertDataOffs) c = len(p) if 4 == c: res += struct.pack(fmt, p[0], p[1], p[2], p[3]) elif 3 == c: res += struct.pack(fmt, p[0], p[1], p[2]) elif 2 == c: res += struct.pack(fmt, p[0], p[1]) elif 1 == c: res += struct.pack(fmt, p[0]) else: raise RuntimeError("Unknown components count") vertBaseOffs = vertBaseOffs + vert.getVertexSize() return res # For Noesis def restorePositionAsBytes(vert, vertexData, posVatr, projMat): invProjMat = matrixinvert(projMat) if 4 != posVatr.compCount: raise RuntimeError("Post vs position not 4 component") outVertBuff = bytes() fmt = posVatr.getFormat() for vertIdx in range(0, vert.getVertexCount()): vertDataOffs = vertIdx * vert.getVertexSize() vertDataOffs = vertDataOffs + posVatr.offs p = struct.unpack_from(fmt, vertexData, vertDataOffs) viewp = matrixmult([p], invProjMat) vp = viewp[0] outVertBuff += struct.pack("fff", vp[0], vp[1], vp[2]) return outVertBuff # For Noesis # Input: vertexData in float32 # comp Idx: 0,1,2 - postion x,y,z # 0,1,2,3 - x,y,z,w def extractVertexComponentsAsBytes(vert, vertexData, compIdxArr): outVertBuff = bytes() outCompCnt = len(compIdxArr) # Output components count 1,2,3,4 if 0 == outCompCnt: return None print("vertex data size in bytes={:d}".format(len(vertexData))) print("vertex count={:d}".format(vert.getVertexCount())) print("vertex size={:d}".format(vert.getVertexSize())) for vertIdx in range(0, vert.getVertexCount()): vertDataOffsBase = vertIdx * vert.getVertexSize() vdata = [] for compIdx in compIdxArr: vertDataOffs = vertDataOffsBase + 4 * compIdx # Offset in bytes from vertex data start p = struct.unpack_from("f", vertexData, vertDataOffs) vdata.append(p[0]) c = len(vdata) if 4 == c: outVertBuff += struct.pack("ffff", vdata[0], vdata[1], vdata[2], vdata[3]) elif 3 == c: outVertBuff += struct.pack("fff", vdata[0], vdata[1], vdata[2]) elif 2 == c: outVertBuff += struct.pack("ff", vdata[0], vdata[1]) elif 1 == c: outVertBuff += struct.pack("f", vdata[0]) print("output extracted vertex data size in bytes={:d}".format(len(outVertBuff))) return outVertBuff def restorePositionAsBytes4(vert, vertexData4, projMat): print("restorePositionAsBytes4 vertex data size={:d}".format(len(vertexData4))) invProjMat = matrixinvert(projMat) outVertBuff = bytes() for vertIdx in range(0, vert.getVertexCount()): vertDataOffs = vertIdx * 4 * 4 # idx * sizeof(float32) * 4(x,y,z,w) p = struct.unpack_from("ffff", vertexData4, vertDataOffs) viewp = matrixmult([p], invProjMat) vp = viewp[0] outVertBuff += struct.pack("fff", vp[0], vp[1], vp[2]) return outVertBuff