mkjs/code/formats/kcl.js

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2017-09-08 09:24:16 -07:00
//
// kcl.js
//--------------------
// Loads kcl files and provides a variety of functions for accessing and using the data.
// by RHY3756547
//
// includes: gl-matrix.js (glMatrix 2.0)
//
window.kcl = function(input, mkwii) {
//todo, support versions for other games (MKWii etc)
this.load = load;
this.getPlanesAt = getPlanesAt;
var vertexOffset, normalOffset, planeOffset, octreeOffset, unknown1, topLeftVec,
xMask, yMask, zMask, coordShift, yShift, zShift, unknown2, trisMapped = 0,
//decoded data
planes, octree, end, mkwiiMode //little endian for ds, big endian for wii
var sf, mouseX = 0, mouseY = 0, offx, offz, loaded = false //for testing
var Fixed32Point = 4096;
if (input != null) {
//handle input, load kcl from data
if (typeof input == "string") {
var xml = new XMLHttpRequest();
xml.responseType = "arraybuffer";
xml.open("GET", input, true);
xml.onload = function() {
load(xml.response);
}
xml.send();
} else {
load(input, mkwii);
}
}
window.onmousemove = function(evt) {
mouseX = evt.pageX;
mouseY = evt.pageY;
}
this.scopeEval = function(code) {return eval(code)} //for debug purposes
//canvas = document.getElementById("canvas");
//ctx = canvas.getContext("2d");
//setInterval(render, 16);
function readBigDec(view, off, mkwii) {
if (mkwii) return view.getFloat32(off);
else return view.getInt32(off, end)/Fixed32Point;
}
function load(buffer, mkwii) {
var mkwii = mkwii;
if (mkwii == null) mkwii = false;
end = !mkwii;
mkwiiMode = mkwii;
var time = Date.now();
//loads kcl from an array buffer.
var view = new DataView(buffer);
vertexOffset = view.getUint32(0x00, end);
normalOffset = view.getUint32(0x04, end);
planeOffset = view.getUint32(0x08, end);
octreeOffset = view.getUint32(0x0C, end);
unknown1 = readBigDec(view, 0x10, mkwii);
var vec = vec3.create();
vec[0] = readBigDec(view, 0x14, mkwii);
vec[1] = readBigDec(view, 0x18, mkwii);
vec[2] = readBigDec(view, 0x1C, mkwii);
topLeftVec = vec;
xMask = view.getUint32(0x20, end);
yMask = view.getUint32(0x24, end);
zMask = view.getUint32(0x28, end);
coordShift = view.getUint32(0x2C, end);
yShift = view.getUint32(0x30, end);
zShift = view.getUint32(0x34, end);
unknown2 = readBigDec(view, 0x38, mkwii);
//read planes, there should be as many as there is 16 byte spaces between planeOffset+0x10 and octreeOffset
offset = planeOffset+0x10;
planes = [null]; //0 index is empty
var minx=0, maxx=0, minz=0, maxz=0;
while (offset < octreeOffset) {
planes.push(new Plane(view, offset));
offset += 0x10;
var vert = planes[planes.length-1].Vertex1;
if (vert[0] < minx) minx=vert[0];
if (vert[0] > maxx) maxx=vert[0];
if (vert[2] < minz) minz=vert[2];
if (vert[2] > maxz) maxz=vert[2];
}
console.log("minx: "+minx+" maxx: "+maxx+" minz: "+minz+" maxz: "+maxz)
//var sfx = canvas.width/(maxx-minx);
//var sfy = canvas.height/(maxz-minz);
//offx = -((minx+maxx)/2);
//offz = -((minz+maxz)/2);
//sf = Math.min(sfx, sfy)*0.8;
octree = []
var rootNodes = ((~xMask >> coordShift) + 1) * ((~yMask >> coordShift) + 1) * ((~zMask >> coordShift) + 1);
for (var i=0; i<rootNodes; i++) {
var off = octreeOffset+i*4;
octree.push(decodeCube(octreeOffset, off, view));
}
loaded = true;
//alert("process took "+(Date.now()-time)+"ms");
}
function render() {
if (!loaded) return;
ctx.save();
ctx.clearRect(0, 0, canvas.width, canvas.height)
ctx.translate(canvas.width/2, canvas.height/2);
ctx.scale(sf, sf);
ctx.translate(offx, offz);
ctx.strokeStyle = "#000000";
ctx.lineWidth = 5;
testDrawPlanes(planes);
var test = getPlanesAt(((mouseX-canvas.width/2)/sf)-offx, topLeftVec[1]+Math.random()*(~yMask), ((mouseY-canvas.height/2)/sf)-offz);
ctx.strokeStyle = "#FF0000";
ctx.lineWidth = 20;
testDrawPlanes(test);
ctx.strokeStyle = "#000000";
ctx.lineWidth = 3;
drawOctreeBorders();
ctx.restore();
/*if (test5 != null) {
ctx.lineWidth = 0.01;
ctx.save();
ctx.translate(canvas.width/2, canvas.height/2);
ctx.scale(sf, sf);
ctx.translate(offx, offz);
ctx.scale(1024, 1024);
ctx.strokeStyle = "#0000FF";
var mdl = test5.modelBuffers[0];
for (var i=0; i<mdl.length; i++) {
var strip = mdl[i].strips[0];
var off = 0;
for (var j=0; j<strip.verts/3; j++) {
ctx.beginPath();
ctx.moveTo(strip.posArray[off], strip.posArray[off+2]);
ctx.lineTo(strip.posArray[off+3], strip.posArray[off+5]);
ctx.lineTo(strip.posArray[off+6], strip.posArray[off+8]);
ctx.closePath();
ctx.stroke();
off += 9;
}
}
ctx.restore();
}*/
}
function drawOctreeBorders() {
var size = 1<<coordShift;
for (var x=0; x<((~xMask >> coordShift) + 1); x++) {
for (var z=0; z<((~zMask >> coordShift) + 1); z++) {
ctx.strokeRect(topLeftVec[0]+size*x, topLeftVec[2]+size*z, size, size);
}
}
}
function testDrawPlanes(planes) {
for (var i=1; i<planes.length; i++) {
var plane = planes[i];
ctx.beginPath();
ctx.moveTo(plane.Vertex1[0], plane.Vertex1[2]);
ctx.lineTo(plane.Vertex2[0], plane.Vertex2[2]);
ctx.lineTo(plane.Vertex3[0], plane.Vertex3[2]);
ctx.closePath();
ctx.stroke();
}
}
function getPlanesAt(x, y, z) {
x -= topLeftVec[0];
y -= topLeftVec[1];
z -= topLeftVec[2];
if (x<0 || y<0 || z<0) return []; //no collision
else {
x = Math.floor(x);
y = Math.floor(y);
z = Math.floor(z);
if ((x&xMask)>0 || (y&yMask)>0 || (z&zMask)>0) return []; //no collision
var index = (x>>coordShift)|((y>>coordShift)<<yShift)|((z>>coordShift)<<zShift)
return traverseOctree(octree[index], x, y, z, coordShift-1);
}
}
function traverseOctree(node, x, y, z, shift) {
if (node.leaf) return node.realTris;
//otherwise we're a node! find next index and traverse
var index = ((x>>shift)&1)|(((y>>shift)&1)<<1)|(((z>>shift)&1)<<2);
return traverseOctree(node.items[index], x, y, z, shift-1);
}
function decodeCube(baseoff, off, view) {
var data = view.getUint32(off, end);
var off2 = baseoff+(data&0x7FFFFFFF);
if (off2 >= view.byteLength) {
return {
leaf: true,
tris: [],
realTris: []
}
}
if (data&0x80000000) { //is a leaf.
off2 += 2;
var tris = [];
var realTris = [];
while (true) {
var read = view.getUint16(off2, end);
if (read == 0) break; //zero terminated
tris.push(read);
realTris.push(planes[read]);
trisMapped += 1;
off2 += 2;
}
return {
leaf: true,
tris: tris,
realTris: realTris
}
} else { //contains 8 more cubes
var cubes = [];
var boff = off2;
for (var i=0; i<8; i++) {
cubes.push(decodeCube(boff, off2, view));
off2 += 4;
}
return {
leaf: false,
items: cubes
}
}
}
function Plane(view, offset) {
this.Len = readBigDec(view, offset, mkwiiMode);
this.Vertex1 = readVert(view.getUint16(offset+0x4, end), view);
this.Normal = readNormal(view.getUint16(offset+0x6, end), view);
this.NormalA = readNormal(view.getUint16(offset+0x8, end), view);
this.NormalB = readNormal(view.getUint16(offset+0xA, end), view);
this.NormalC = readNormal(view.getUint16(offset+0xC, end), view);
this.CollisionType = view.getUint16(offset+0xE, end);
var crossA = vec3.cross(vec3.create(), this.NormalA, this.Normal);
var crossB = vec3.cross(vec3.create(), this.NormalB, this.Normal);
this.Vertex2 = vec3.scaleAndAdd(vec3.create(), this.Vertex1, crossB, (this.Len/vec3.dot(crossB, this.NormalC)));
this.Vertex3 = vec3.scaleAndAdd(vec3.create(), this.Vertex1, crossA, (this.Len/vec3.dot(crossA, this.NormalC)));
}
function readVert(num, view) {
var vec = vec3.create();
var loc = vertexOffset+num*0xC;
vec[0] = readBigDec(view, loc, mkwiiMode);
vec[1] = readBigDec(view, loc+0x4, mkwiiMode);
vec[2] = readBigDec(view, loc+0x8, mkwiiMode);
return vec;
}
function readNormal(num, view) {
var mkwii = mkwiiMode;
var vec = vec3.create();
if (mkwii) {
var loc = normalOffset+num*0xC;
vec[0] = view.getFloat32(loc);
vec[1] = view.getFloat32(loc+0x4);
vec[2] = view.getFloat32(loc+0x8);
} else {
var loc = normalOffset+num*0x6;
vec[0] = view.getInt16(loc, end)/4096; //fixed point
vec[1] = view.getInt16(loc+0x2, end)/4096;
vec[2] = view.getInt16(loc+0x4, end)/4096;
}
return vec;
}
}