зеркало из https://github.com/mozilla/pjs.git
391 строка
13 KiB
HTML
391 строка
13 KiB
HTML
<html>
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<head>
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<title>3d thingy</title>
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<style type="text/css">
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div.z2 { position:absolute; z-index:2; }
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div.z1 { position:absolute; z-index:1; }
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</style>
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<script type="text/javascript">
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/**************************************************************************
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JavaScript Graphics Library 0.0.1, Updated Source Code at Scriptersoft.com
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Copyright (C) 2005 Kurt L. Whicher
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November,13,2005
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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**************************************************************************/
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//________________________________________ global variables
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var S_piDoubled=Math.PI*2;
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var S_deg2Rad=Math.PI/180;
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//_______________________________________________ functions
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function S_matrix() {
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return [1,0,0,0,
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0,1,0,0,
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0,0,1,0,
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0,0,0,1];
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}
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function S_vec2D(x,y) { this.x=x; this.y=y; }
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function S_vec3D(x,y,z) { this.x=x; this.y=y; this.z=z; }
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function S_subVec2D(a,b) {
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return new S_vec2D(a.x-b.x, a.y-b.y);
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}
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function S_subVec3D(a,b) {
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return new S_vec3D(a.x-b.x, a.y-b.y, a.z-b.z);
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}
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function S_dotVec3D(a, b) { return a.x*b.x+a.y*b.y+a.z*b.z; }
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function S_cross(a,b) {
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return new S_vec3D( a.y*b.z-a.z*b.y, a.z*b.x-a.x*b.z, a.x*b.y-a.y*b.x);
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}
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function S_lengthSquaredVec3D(v) { return S_dotVec3D(v,v); }
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function S_lengthVec3D(v) { return Math.sqrt(S_lengthSquaredVec3D(v)); }
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function S_normalizeVec3D(v) {
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var l=S_lengthVec3D(v), nv=new S_vec3D(0,0,0);
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if(l!=0) { nv.x=v.x/l; nv.y=v.y/l; nv.z=v.z/l; }
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return nv;
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}
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function S_rotate(m,ax,a) { // transformation matrix, axis, angle
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var i,j,ij=new Array(),v=new Array(),c=Math.cos(a),s=Math.sin(a);
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if (ax=="x") ij=[1,2,5,6,9,10,13,14];
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else if (ax=="y") ij=[2,0,6,4,10,8,14,12];
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else if (ax=="z") ij=[0,1,4,5,8,9,12,13];
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for (i=0;i<8;i++) v[i]=m[ij[i]];
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for (i=0,j=1;i<8;i+=2,j+=2) {
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m[ij[i]]=v[i]*c-v[j]*s;
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m[ij[j]]=v[i]*s+v[j]*c
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}
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}
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function S_checkBrowser() {
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if (document.getElementById) return true; else return false;
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}
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function S_zIndex(e,z) { document.getElementById(e).style.zIndex=z; }
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function S_rgbColor(r,g,b) {
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var i, c=[r,g,b];
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for(i=0; i<3; i++) {
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c[i]=Math.floor(c[i]);
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if(c[i]<0) c[i]=0; else if(c[i]>255) c[i]=255;
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}
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return c;
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}
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function S_rgbColorString(c) {
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return "rgb("+c[0]+","+c[1]+","+c[2]+")";
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}
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function S_vertice(x,y,z) {
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this.x=x; this.y=y; this.z=z; this.w=1;
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this.t=new S_vec3D(x,y,z); // transformed 3d
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this.p=new S_vec2D(0,0); // projected 2d
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}
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function S_face(v0,v1,v2,c) { // 3 vertice faces
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this.v=[v0,v1,v2]; this.c=c; this.b=0; // b:brightness
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this.d=true; // display: true or false
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}
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// x coordinate, number of vertices, distance
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function S_verticeRing(x,nv,d) {
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var i,a,v=new Array();
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for(i=0;i<nv;i++) {
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a=S_piDoubled*i/nv;
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v[i]=new S_vertice(x,d*Math.sin(a),d*Math.cos(a));
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}
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return v;
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}
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function S_triangleRing(r1,r2,c,clr) { // rows 1 & 2, cols, color
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var i,j,tr=new Array();
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for(i=0,j=1;i<c;i++,j=++j%c) {
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tr.push(new S_face(r1+i,r2+i,r2+j,clr));
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tr.push(new S_face(r1+i,r2+j,r1+j,clr));
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}
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return tr;
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}
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function S_model(v,f) {
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// vertice & face arrays, transformation matrix, display boolean
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this.v=v; this.f=f, this.tm=S_matrix(), this.d=true;
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}
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S_model.prototype.S_rotateX=function(a) {
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S_rotate(this.tm,"x",a*=S_deg2Rad);
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}
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S_model.prototype.S_rotateY=function(a) {
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S_rotate(this.tm,"y",a*=S_deg2Rad);
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}
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S_model.prototype.S_rotateZ=function(a) {
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S_rotate(this.tm,"z",a*=S_deg2Rad);
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}
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S_model.prototype.S_show=function() { this.d=true; }
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S_model.prototype.S_hide=function() { this.d=false; }
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function S_cube(d,c) { //distance & color
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return new S_cone(d,d,Math.cos(Math.PI/4)*d*2,1,4,c);
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}
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function S_cylinder(w,h,r,c,clr,e) {
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return new S_cone(w,w,h,r,c,clr,e);
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}
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// width, height, "rows", "columns", color, ends
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function S_cone(w1,w2,h,r,c,clr,e) {
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var i,r1=0,r2=c,v=new Array(),t=new Array(),rxc=r*c;
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for(i=0;i<=r;i++)
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v=v.concat(S_verticeRing(h*(0.5-i/r),c,w1*i/r+w2*(r-i)/r));
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for(i=0;i<r;i++,r1+=c,r2+=c)
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t=t.concat(S_triangleRing(r1,r2,c,clr));
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if (e!="hideEnds")
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for(i=1;i<(c-1);i++) {
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t.push(new S_face(0,i,i+1,clr));
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t.push(new S_face(rxc,rxc+i+1,rxc+i,clr));
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}
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return new S_model(v,t);
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}
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function S_sphere(d,r,c,clr) {
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// distance, "rows">=2, "columns">=3, color paramaters
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var v=new Array(),t=new Array(),r_1xc=(r-1)*c,r_2xc=(r-2)*c;
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var i,j,tmp,r1=0,r2=c;
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for(i=1;i<r;i++) {
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tmp=Math.PI*i/r;
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v=v.concat(S_verticeRing(d*Math.cos(tmp),c,Math.sin(tmp)*d));
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}
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v.push(new S_vertice( d,0,0));
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v.push(new S_vertice(-d,0,0));
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for(i=0;i<(r-2);i++,r1+=c,r2+=c)
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t=t.concat(S_triangleRing(r1,r2,c,clr));
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for(i=0,j=1;i<c;i++,j=++j%c) {
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t.push(new S_face(r_1xc,i,j,clr));
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t.push(new S_face(r_1xc+1,r_2xc+j,r_2xc+i,clr));
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}
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return new S_model(v,t);
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}
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S_model.prototype.S_scale=function(x) {
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this.tm[0]*=x; this.tm[5]*=x; this.tm[10]*=x;
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}
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S_model.prototype.S_faceColor=function(i,c) { this.f[i].c=c; }
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S_model.prototype.S_scaleX=function(s) { this.tm[0]*=s; }
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S_model.prototype.S_scaleY=function(s) { this.tm[5]*=s; }
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S_model.prototype.S_scaleZ=function(s) { this.tm[10]*=s; }
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function S_scene(dv,l,t,w,h,cmra) { // left, top, width, height
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this.dv=dv;
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this.ps=1; // pixel size
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this.l=l; this.t=t; this.w=w; this.h=h;
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this.cx=l+w/2; this.cy=t+h/2; // center x, center y
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this.dt="paint"; // output type
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this.m=new Array(); // model array
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this.lght=new S_light();
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this.lc=S_rgbColor(255,255,255); // light color
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this.cmra=-cmra; // camera on z axis
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this.bfr=S_buffer(h,w);
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}
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function S_buffer(h,w) {
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var i, j, b=new Array();
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for(i=0;i<h;i++) {
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b[i]=new Array();
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for(j=0;j<w;j++) b[i][j]=new S_pixel();
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}
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return b;
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}
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function S_pixel() { // display boolean, color
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this.d=true; this.c=0;
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}
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S_pixel.prototype.S_setColor=function(c) {
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this.d=true; this.c=c;
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}
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S_pixel.prototype.S_hide=function() { this.d=false; }
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S_scene.prototype.S_pixelSize=function(ps){ this.ps=ps; }
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S_scene.prototype.S_widthAndHeight=function(w,h){ this.w=w; this.h=h; }
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S_scene.prototype.S_center=function(cx,cy){ this.cx=cx; this.cy=cy; }
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S_scene.prototype.S_paint=function(){ this.dt="paint"; }
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S_scene.prototype.S_models=function() {
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var i; this.m=new Array();
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for(i=0;i<arguments.length;i++) this.m.push(arguments[i]);
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}
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S_scene.prototype.S_lightColor=function(c){ this.lc=c; }
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S_scene.prototype.S_project=function() {
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var i, j, v, tm, d, m;
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for(i=0;i<this.m.length;i++) {
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m=this.m[i]; tm=this.m[i].tm;
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for(j=0;j<m.v.length;j++) {
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v=m.v[j];
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v.t.x=v.x*tm[0]+v.y*tm[4]+v.z*tm[8]+v.w*tm[12];
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v.t.y=v.x*tm[1]+v.y*tm[5]+v.z*tm[9]+v.w*tm[13];
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v.t.z=v.x*tm[2]+v.y*tm[6]+v.z*tm[10]+v.w*tm[14];
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d=(this.cmra-v.t.z/2);
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if (d<0) {
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v.p.x=(this.cmra*v.t.x/d)+this.cx;
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v.p.y=-(this.cmra*v.t.y/d)+this.cy;
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}
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}
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}
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}
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S_scene.prototype.S_display=function(disp){
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var i, j, k, s="", ds, c, cnt=0; // ds:div start
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this.tr=new Array(); // triangles ready to draw
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this.S_project();
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this.S_adjustLight();
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this.S_clearBuffer();
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for(i=0;i<this.m.length;i++) {
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this.m[i].S_setupFaces(this.tr,this.lght.t);
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for(j=0;j<this.tr.length;j++) { // loop through triangles
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c=S_divColor(this.tr[j].c,this.lc,this.tr[j].b);
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S_setupBuffer(this,this.tr[j].p,c);
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}
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}
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for(i=0;i<this.h;i++) {
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ds=-1;
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for(j=0,k=1;j<this.w;j++,k++) {
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if((this.bfr[i][j].d==true)&&(ds==-1)) ds=j;
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if( (this.bfr[i][j].d==true)&&
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( (k==this.w)||
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(this.bfr[i][k].d==false)||
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(!S_sameColor(this.bfr[i][j].c, this.bfr[i][k].c)) ) ) {
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s+=S_divString(S_rgbColorString(this.bfr[i][j].c),this.t+i*this.ps,this.l+ds*this.ps,this.ps,(k-ds)*this.ps);
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ds=-1;
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cnt++;
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}
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}
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}
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S_writeInnerHTML(this.dv,s);
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if(disp=="ShowCount") alert(cnt);
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}
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S_scene.prototype.S_displayAndShowCount=function(){
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this.S_display("ShowCount");
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}
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S_model.prototype.S_setupFaces=function(tr,lght) {
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var i, j, fn, v, p=new Array(); // vertice & projection arrays
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var z=new Array();
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for(i=0;i<this.f.length;i++) { // loop through faces
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v=this.f[i].v;
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for(j=0;j<3;j++) { p[j]=this.v[v[j]].p; }
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for(j=0;j<3;j++) { z[j]=this.v[v[j]].t.z; }
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if (((p[1].x-p[0].x)*(p[2].y-p[0].y))<((p[2].x-p[0].x)*(p[1].y-p[0].y))) {
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this.f[i].d=true;
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fn=S_faceNormal(this.v[v[0]].t, this.v[v[1]].t, this.v[v[2]].t);
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this.f[i].b=S_faceIntensity(fn,lght);
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tr.push(new S_triangle(fn,this.f[i].b,p.slice(),this.f[i].c,z));
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} else { this.f[i].d=false; }
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}
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}
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// normal, brightness, array of 2D projection coordinates, and z depth
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function S_triangle(fn,b,p,c,z) {
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this.fn=fn; this.b=b; this.p=p; this.z=z; this.c=c;
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}
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function S_faceNormal(a,b,c){
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var cr=S_cross(S_subVec3D(b,a), S_subVec3D(b,c));
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return S_normalizeVec3D(cr);
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}
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function S_faceIntensity(fn,lght) {
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var i=S_dotVec3D(fn,lght); return (i>0)?i:0;
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}
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function S_divColor(c,lc,b) { // c:array of colors
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var i, clr=new Array();
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for(i=0;i<3;i++) clr[i]=Math.floor(c[i]+(lc[i]-c[i]+1)*b);
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for(i=0;i<3;i++) if (clr[i]>lc[i]) { clr[i]=lc[i]; }
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return S_rgbColor(clr[0],clr[1],clr[2]);
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}
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function S_sameColor(a,b) {
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for(var i=0;i<3;i++) { if(a[i]!=b[i]) return false; }
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return true;
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}
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function S_setupBuffer(scn,p,c) {
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// temp, counters, min, max, scanline, vertice & slope arrays
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var t,i,j,xmin=new Array(),xmax=new Array(),sl;
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var v=new Array(), m=new Array();
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p.sort(function(a,b) { return a.y-b.y; } );
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for(i=0;i<3;i++) p[i].y=Math.floor(p[i].y);
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v[0]=S_subVec2D(p[1],p[0]);
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v[1]=S_subVec2D(p[2],p[0]);
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v[2]=S_subVec2D(p[2],p[1]);
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for(i=0;i<3;i++) { m[i]=(v[i].y!=0)?v[i].x/v[i].y:0; }
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for(i=0,sl=scn.t;i<scn.h;i++,sl++) {
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xmin[i]=1000;xmax[i]=0;
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if((sl>=p[0].y)&&(sl<=p[2].y)) {
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xmin[i]=xmax[i]=Math.floor(p[0].x+m[1]*(sl-p[0].y));
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}
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if((sl>=p[0].y)&&(sl<=p[1].y)) {
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t=Math.floor(p[0].x+m[0]*(sl-p[0].y));
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if(t<xmin[i]) xmin[i]=Math.floor(t);
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else if(t>xmax[i]) xmax[i]=Math.floor(t);
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}
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if((sl>=p[1].y)&&(sl<=p[2].y)) {
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t=Math.floor(p[1].x+m[2]*(sl-p[1].y));
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if(t<xmin[i]) xmin[i]=Math.floor(t);
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else if(t>xmax[i]) xmax[i]=Math.floor(t);
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}
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for(j=0;j<scn.w;j++)
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if((j>=(xmin[i]-scn.l))&&(j<=(xmax[i]-scn.l))) {
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scn.bfr[i][j].d=true; scn.bfr[i][j].c=c;
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}
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}
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}
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function S_light() {
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this.x=0; this.y=1; this.z=0; this.w=1; // original coordinates
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this.t=new S_vec3D(0,1,0); // transformed coordinates
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this.tm=new S_matrix();
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}
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S_scene.prototype.S_adjustLight=function() {
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var m=this.lght.tm, l=this.lght;
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l.t.x=l.x*m[0]+l.y*m[4]+ l.z*m[8]+l.w*m[12];
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l.t.y=l.x*m[1]+l.y*m[5]+ l.z*m[9]+l.w*m[13];
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l.t.z=l.x*m[2]+l.y*m[6]+ l.z*m[10]+l.w*m[14];
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l.t=S_normalizeVec3D(l.t);
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}
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S_scene.prototype.S_lightRotateX=function(a) {
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S_rotate(this.lght.tm,"x",a*=S_deg2Rad);
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}
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S_scene.prototype.S_lightRotateY=function(a) {
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S_rotate(this.lght.tm,"y",a*=S_deg2Rad);
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}
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S_scene.prototype.S_lightRotateZ=function(a) {
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S_rotate(this.lght.tm,"z",a*=S_deg2Rad);
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}
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S_scene.prototype.S_clearBuffer=function() {
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for(var i=0;i<this.h;i++)
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for(var j=0;j<this.w;j++) this.bfr[i][j].d=false;
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}
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function S_divString(b,t,l,h,w) {
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var s='<div style="background-color:'+b+';position:absolute;';
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s+='top:'+t+'px;left:'+l+'px;height:'+h+'px;width:'+w;
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return s+'px;font-size:0;visibility:visible"></div>';
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}
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function S_writeInnerHTML(id,text) {
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document.getElementById(id).innerHTML = text;
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}
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</script>
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</head>
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<body>
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|
<div class="z1" id="graphicsDiv">Text to be replaced with graphics.</div>
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|
<script type="text/javascript">
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|
if(S_checkBrowser()) {
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|
var intrvl;
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|
// Create a new scene with parameters for
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|
// div id, left, top, width, height, and camera distance
|
|
var scn=new S_scene("graphicsDiv",75,25,100,100,300);
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|
scn.S_pixelSize(3); // set scene pixel size
|
|
var c=S_rgbColor(0,0,127); // color
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|
var c2=S_rgbColor(0,127,127); // color
|
|
var m=new S_cube(18,c); // model
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|
m.S_faceColor(4,c2);
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|
m.S_faceColor(5,c2);
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|
m.S_scaleX(2.5); // scale model along x axis
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|
scn.S_models(m); // add model(s) to scene
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|
scn.S_lightRotateX(-25); // adjust light
|
|
function r(){ // rotation function
|
|
m.S_rotateX(11); // rotate model around y axis
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|
m.S_rotateY(5); // rotate model around y axis
|
|
m.S_rotateZ(7); // rotate model around z axis
|
|
scn.S_display(); // display scene
|
|
} // end rotation function
|
|
intrvl=setInterval('r();',75);
|
|
}
|
|
</script>
|
|
|
|
</body>
|
|
</html>
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|
|