85 lines
2.3 KiB
JavaScript
85 lines
2.3 KiB
JavaScript
//
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// nitro.js
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//--------------------
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// General purpose functions for nitro formats, eg. NSBTX or NSBMD
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// by RHY3756547
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//
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// includes: gl-matrix.js (glMatrix 2.0)
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//
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window.nitro = new function() {
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this.readHeader = function(view) { //input: DataView with base offset at header position
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var stamp = readChar(view, 0x0)+readChar(view, 0x1)+readChar(view, 0x2)+readChar(view, 0x3);
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var unknown1 = view.getUint32(0x4, true);
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var filesize = view.getUint32(0x8, true);
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var headsize = view.getUint16(0xC, true);
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var numSections = view.getUint16(0xE, true);
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var sectionOffsets = [];
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for (var i=0; i<numSections; i++) {
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sectionOffsets.push(view.getUint32(0x10+i*4, true));
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}
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return {
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stamp: stamp,
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unknown1: unknown1,
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filesize: filesize,
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headsize: headsize,
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numSections: numSections,
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sectionOffsets: sectionOffsets
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}
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}
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this.read3dInfo = function(view, offset, dataHandler) {
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var baseOff = offset;
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offset += 1; //skip dummy
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var numObjects = view.getUint8(offset++);
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var secSize = view.getUint16(offset, true);
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offset += 2;
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//unknown block. documentation out of 10
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var uhdSize = view.getUint16(offset, true);
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offset += 2;
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var usecSize = view.getUint16(offset, true);
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offset += 2;
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var unknown = view.getUint32(offset, true); //usually 0x0000017F
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offset += 4;
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var objectUnk = []
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for (var i=0; i<numObjects; i++) {
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var uk1 = view.getUint16(offset, true);
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var uk2 = view.getUint16(offset+2, true);
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objectUnk.push({uk1: uk1, uk2: uk2});
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offset += 4;
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}
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//info block
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var ihdSize = view.getUint16(offset, true);
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offset += 2;
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var isecSize = view.getUint16(offset, true);
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offset += 2;
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var objectData = []
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for (var i=0; i<numObjects; i++) {
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var data = dataHandler(view, offset, baseOff, i); //must return object with "nextoff" as offset after reading data
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objectData.push(data)
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offset = data.nextoff;
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}
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var names = []
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for (var i=0; i<numObjects; i++) {
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var name = "";
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for (var j=0; j<16; j++) {
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name += readChar(view, offset++)
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}
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names.push(name);
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}
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return {
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numObjects: numObjects,
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unknown: unknown,
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objectUnk: objectUnk,
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objectData: objectData,
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names: names,
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nextoff: offset
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}
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}
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function readChar(view, offset) {
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return String.fromCharCode(view.getUint8(offset));
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}
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} |