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-rw-r--r--xp/cgxp/1.html14
-rw-r--r--xp/cgxp/2.html14
-rw-r--r--xp/cgxp/main1.js320
-rw-r--r--xp/cgxp/main2.js280
-rw-r--r--xp/cgxp/wglmath.js102
5 files changed, 730 insertions, 0 deletions
diff --git a/xp/cgxp/1.html b/xp/cgxp/1.html
new file mode 100644
index 0000000..b05e78f
--- /dev/null
+++ b/xp/cgxp/1.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>CGxp1</title>
+<link rel="icon" href="/favicon.png">
+<link rel="stylesheet" type="text/css" href="/common.css">
+<script type="text/javascript" src="main1.js"></script>
+<script type="text/javascript" src="wglmath.js"></script>
+</head>
+<body onload="init();" style="margin:0;">
+<canvas id="glCvs" width="800" height="450" style=""></canvas>
+</body>
+</html>
diff --git a/xp/cgxp/2.html b/xp/cgxp/2.html
new file mode 100644
index 0000000..880c0cb
--- /dev/null
+++ b/xp/cgxp/2.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>CGxp2</title>
+<link rel="icon" href="/favicon.png">
+<link rel="stylesheet" type="text/css" href="/common.css">
+<script type="text/javascript" src="main2.js"></script>
+<script type="text/javascript" src="wglmath.js"></script>
+</head>
+<body onload="init();" style="margin:0;">
+<canvas id="glCvs" width="800" height="450" style=""></canvas>
+</body>
+</html>
diff --git a/xp/cgxp/main1.js b/xp/cgxp/main1.js
new file mode 100644
index 0000000..bd52e13
--- /dev/null
+++ b/xp/cgxp/main1.js
@@ -0,0 +1,320 @@
+//Copyright Chris Xiong 2018
+//License: Expat (MIT)
+var cvs,WGL,vpw,vph,hdiv;
+var fsh=`
+varying lowp vec4 vC;
+void main(void)
+{
+ gl_FragColor=vC;
+}`;
+var vsh=`
+attribute vec3 vp;
+attribute vec4 vc;
+uniform mat4 mmodelview;
+uniform mat4 mprojection;
+varying lowp vec4 vC;
+void main(void)
+{
+ gl_Position=mprojection*mmodelview*vec4(vp,1.);
+ vC=vc;
+}`;
+var shp;
+var vbufsize=4096;
+var vbo,ibo;
+var vb=new Float32Array(vbufsize*7);
+var ib=new Uint16Array(vbufsize*6/4);
+var Mprojection,Mmodelview;
+var primc;
+var kst=[];
+var dbc,mbtn,mup,mdn,mx,my,mox,moy;
+var shapes=[];
+var curshape=null;
+var dragging=false,drg;
+
+var Shape=function(t)
+{
+ this.type=t;
+ this.vert=[];
+}
+function copyshape(s)
+{
+ var r=new Shape(s.type);
+ for(var i=0;i<s.vert.length;++i)
+ r.vert.push(new v3d(s.vert[i].x,s.vert[i].y,s.vert[i].z));
+ return r;
+}
+Shape.prototype.draw=function(a,r,g,b)
+{
+ var drawseg=function(a,b,c,d,aa,rr,gg,bb)
+ {
+ var pa=new v3d(a,b,0);
+ var pb=new v3d(c,d,0);
+ var d=pb.subtract(pa);
+ var pd1=new v3d(-d.y,d.x,0),pd2=new v3d(d.y,-d.x,0);
+ pd1=pd1.n();pd2=pd2.n();
+ var p1=pa.add(pd1),p2=pa.add(pd2);
+ var p3=pb.add(pd2),p4=pb.add(pd1);
+ var q=[];
+ q.push(p1.x);q.push(vph-p1.y);q.push(p1.z);
+ q.push(rr);q.push(gg);q.push(bb);q.push(aa);
+ q.push(p2.x);q.push(vph-p2.y);q.push(p2.z);
+ q.push(rr);q.push(gg);q.push(bb);q.push(aa);
+ q.push(p3.x);q.push(vph-p3.y);q.push(p3.z);
+ q.push(rr);q.push(gg);q.push(bb);q.push(aa);
+ q.push(p4.x);q.push(vph-p4.y);q.push(p4.z);
+ q.push(rr);q.push(gg);q.push(bb);q.push(aa);
+ pushQuad(q);
+ }
+ if(this.type=='segment')
+ drawseg(this.vert[0].x,this.vert[0].y,this.vert[1].x,this.vert[1].y,
+ a,r,g,b);
+ if(this.type=='segstrip'||this.type=='segloop')
+ {
+ for(var i=0;i<this.vert.length-1;++i)
+ drawseg(this.vert[i].x,this.vert[i].y,this.vert[i+1].x,this.vert[i+1].y,
+ a,r,g,b);
+ if(this.type=='segloop')
+ {
+ var i=this.vert.length-1;
+ drawseg(this.vert[i].x,this.vert[i].y,this.vert[0].x,this.vert[0].y,
+ a,r,g,b);
+ }
+ }
+}
+Shape.prototype.coltest=function(x,y)
+{
+ var dp2s=function(x,y,_a,_b,_c,_d)
+ {
+ var a=new v3d(_a,_b,0);
+ var b=new v3d(_c,_d,0);
+ var p=new v3d(x,y,0);
+ var ab=b.subtract(a);
+ var ap=p.subtract(a);
+ var pl=ab.dot(ap)/ab.l();
+ var pp=a.add(ab.n().ms(pl));
+ if(pl<0||pl>ab.l())pp=new v3d(1e9,1e9,1e9);
+ return Math.min(p.subtract(pp).l(),p.subtract(a).l(),p.subtract(b).l());
+ }
+ if(this.type=='segment')
+ {
+ var d=dp2s(x,y,this.vert[0].x,this.vert[0].y,
+ this.vert[1].x,this.vert[1].y);
+ if(d<5)return true;
+ }
+ if(this.type=='segstrip'||this.type=="segloop")
+ {
+ for(var i=0;i<this.vert.length-1;++i)
+ {
+ var d=dp2s(x,y,this.vert[i].x,this.vert[i].y,
+ this.vert[i+1].x,this.vert[i+1].y);
+ if(d<5)return true;
+ }
+ if(this.type=="segloop")
+ {
+ var i=this.vert.length-1;
+ var d=dp2s(x,y,this.vert[i].x,this.vert[i].y,
+ this.vert[0].x,this.vert[0].y);
+ if(d<5)return true;
+ }
+ }
+ return false;
+}
+
+function createShader(sh,t)
+{
+ var shader=WGL.createShader(t);
+ WGL.shaderSource(shader,sh);
+ WGL.compileShader(shader);
+ if(!WGL.getShaderParameter(shader,WGL.COMPILE_STATUS))
+ {
+ alert("shader error..."+WGL.getShaderInfoLog(shader));
+ return null;
+ }
+ return shader;
+}
+function pushQuad(a)
+{
+ if(primc>=vbufsize/4)batchGL();
+ for(var i=0;i<4;++i)
+ for(var j=0;j<7;++j)vb[primc*7*4+i*7+j]=a[i*7+j];
+ ++primc;
+}
+
+function init()
+{
+ cvs=document.getElementById("glCvs");
+ if(!window.devicePixelRatio)window.devicePixelRatio=1;
+ cvs.width=window.innerWidth;
+ cvs.height=window.innerHeight;
+ cvs.style.width=cvs.width+"px";
+ cvs.style.height=cvs.height+"px";
+ cvs.width=cvs.width*window.devicePixelRatio;
+ cvs.height=cvs.height*window.devicePixelRatio;
+ vpw=cvs.width;vph=cvs.height;
+ try
+ {WGL=cvs.getContext("webgl")||cvs.getContext("experimental-webgl");}
+ catch(e){WGL=null;}
+ if(!WGL){alert("WebGL is not supported by your browser...");return;}
+
+ WGL.clearColor(0.5,0.5,0.5,1.0);
+ WGL.clearDepth(1);
+ WGL.enable(WGL.DEPTH_TEST);
+ WGL.depthFunc(WGL.LESS);
+ WGL.enable(WGL.BLEND);
+ WGL.blendFunc(WGL.SRC_ALPHA,WGL.ONE_MINUS_SRC_ALPHA);
+ WGL.clear(WGL.COLOR_BUFFER_BIT|WGL.DEPTH_BUFFER_BIT);
+ WGL.viewport(0,0,cvs.width,cvs.height);
+
+ shp=WGL.createProgram();
+ var fshs=createShader(fsh,WGL.FRAGMENT_SHADER);
+ var vshs=createShader(vsh,WGL.VERTEX_SHADER);
+ WGL.attachShader(shp,vshs);WGL.attachShader(shp,fshs);
+ WGL.linkProgram(shp);
+ if(!WGL.getProgramParameter(shp,WGL.LINK_STATUS))
+ {
+ alert("shader link error...");
+ }
+ WGL.useProgram(shp);
+
+ vbo=WGL.createBuffer();
+ WGL.bindBuffer(WGL.ARRAY_BUFFER,vbo);
+ WGL.bufferData(WGL.ARRAY_BUFFER,vb,WGL.STATIC_DRAW);
+ var vpp=WGL.getAttribLocation(shp,"vp");
+ var vcp=WGL.getAttribLocation(shp,"vc");
+ WGL.enableVertexAttribArray(vpp);
+ WGL.enableVertexAttribArray(vcp);
+ WGL.bindBuffer(WGL.ARRAY_BUFFER,vbo);
+ WGL.vertexAttribPointer(vpp,3,WGL.FLOAT,false,7*4,0);
+ WGL.vertexAttribPointer(vcp,4,WGL.FLOAT,false,7*4,3*4);
+
+ for(var i=0,n=0,p=0;i<vbufsize/4;++i)
+ {
+ ib[p++]=n;ib[p++]=n+1;
+ ib[p++]=n+2;ib[p++]=n+2;
+ ib[p++]=n+3;ib[p++]=n;
+ n+=4;
+ }
+ ibo=WGL.createBuffer();
+ WGL.bindBuffer(WGL.ELEMENT_ARRAY_BUFFER,ibo);
+ WGL.bufferData(WGL.ELEMENT_ARRAY_BUFFER,ib,WGL.STATIC_DRAW);
+
+ document.addEventListener('keydown',function(e){kst[e.code]=1;});
+ document.addEventListener('keyup',function(e){kst[e.code]=0;});
+ document.addEventListener('mousedown',function(e){mdn=true;mbtn=e.button;});
+ document.addEventListener('contextmenu',function(e){e.preventDefault();});
+ document.addEventListener('mouseup',function(e){mup=true;});
+ document.addEventListener('dblclick',function(e){dbc=true;});
+ document.addEventListener('mousemove',function(e)
+ {mx=e.clientX/window.innerWidth*vpw;my=e.clientY/window.innerHeight*vph;});
+
+ requestAnimationFrame(mainloop);
+}
+function getpick()
+{
+ for(var i=0;i<shapes.length;++i)
+ if(shapes[i].coltest(mx,my))return i;
+ return -1;
+}
+
+function mainloop()
+{
+ WGL.clearColor(0.5,0.5,0.5,1.0);
+ WGL.clearDepth(1);
+ WGL.clear(WGL.COLOR_BUFFER_BIT|WGL.DEPTH_BUFFER_BIT);
+ primc=0;
+ Mmodelview=buildIdentityMatrix();
+ var picked=getpick();
+
+ //interaction shit
+ if(dragging)
+ {
+ if(mup)
+ {dragging=false;curshape=null;mdn=mup=false;}
+ if(!mdn&&mbtn==0&&dragging)
+ for(var i=0;i<shapes[drg].vert.length;++i)
+ shapes[drg].vert[i]=curshape.vert[i].add(new v3d(mx,my,0).subtract(new v3d(mox,moy,0)));
+ if(!mdn&&mbtn==2&&dragging)
+ {
+ var newscale=new v3d(mox,moy,0).subtract(new v3d(mx,my,0)).l()/20;
+ if(mx<mox||my<moy)newscale=-newscale;
+ if(newscale<-95)newscale=-95;
+ var sc=(100+newscale)/100.;
+ var mmx=curshape.vert[0].x,mmy=curshape.vert[0].y;
+ for(var i=1;i<curshape.vert.length;++i)
+ mmx=Math.min(mmx,curshape.vert[i].x),
+ mmy=Math.min(mmy,curshape.vert[i].y);
+ var c=new v3d(mmx,mmy,0);
+ for(var i=0;i<shapes[drg].vert.length;++i)
+ shapes[drg].vert[i]=curshape.vert[i].subtract(c).n().ms
+ (curshape.vert[i].subtract(c).l()*sc).add(c);
+ }
+
+ }
+ if(dbc)
+ {
+ if(dragging)
+ {dragging=false;curshape=null;}
+ else
+ if(curshape)
+ {
+ if(kst['ControlLeft']==1&&curshape.type=='segstrip')
+ curshape.type='segloop';
+ shapes.push(curshape);
+ curshape=null;
+ }
+ }
+ else
+ {
+ if(mup&&kst['ControlLeft']==1&&!curshape)
+ {
+ if(picked!=-1)
+ {
+ dragging=true;
+ mox=mx,moy=my;drg=picked;
+ curshape=copyshape(shapes[picked]);
+ }
+ }
+ if(mup&&!dragging&&!kst['ControlLeft'])
+ {
+ if(!curshape)
+ {
+ curshape=new Shape('segment');
+ curshape.vert.push(new v3d(mx,my,0));
+ curshape.vert.push(new v3d(mx,my,0));
+ }
+ else
+ {
+ if(curshape.type=='segment')curshape.type='segstrip';
+ curshape.vert.push(new v3d(mx,my,0));
+ }
+ }
+ }
+
+ if(curshape&&!dragging)
+ curshape.vert[curshape.vert.length-1]=new v3d(mx,my,0);
+
+ for(var i=0;i<shapes.length;++i)
+ if(!curshape&&!dragging&&i==picked)shapes[i].draw(1,0.8,0,0);
+ else shapes[i].draw(1,0.8,0.8,0.8);
+
+ if(curshape&&!dragging)curshape.draw(1,0.8,0.8,0);
+
+ batchGL();
+
+ mup=mdn=dbc=false;
+ requestAnimationFrame(mainloop);
+}
+
+function batchGL()
+{
+ Mprojection=buildProjectionMatrix2D(vpw,vph);
+ var mpp=WGL.getUniformLocation(shp,"mprojection");
+ WGL.uniformMatrix4fv(mpp,false,Mprojection);
+ var mvpp=WGL.getUniformLocation(shp,"mmodelview");
+ WGL.uniformMatrix4fv(mvpp,false,Mmodelview);
+ WGL.bindBuffer(WGL.ARRAY_BUFFER,vbo);
+ WGL.bufferData(WGL.ARRAY_BUFFER,vb,WGL.STATIC_DRAW);
+ WGL.drawElements(WGL.TRIANGLES,6*primc,WGL.UNSIGNED_SHORT,0);
+ primc=0;
+}
+
diff --git a/xp/cgxp/main2.js b/xp/cgxp/main2.js
new file mode 100644
index 0000000..05b1fdb
--- /dev/null
+++ b/xp/cgxp/main2.js
@@ -0,0 +1,280 @@
+//Copyright Chris Xiong 2018
+//License: Expat (MIT)
+var cvs,WGL,vpw,vph,hdiv;
+var fsh=`
+varying lowp vec4 vC;
+void main(void)
+{
+ gl_FragColor=vC;
+}`;
+var vsh=`
+attribute vec3 vp;
+attribute vec4 vc;
+uniform mat4 mmodelview;
+uniform mat4 mprojection;
+varying lowp vec4 vC;
+void main(void)
+{
+ gl_Position=mprojection*mmodelview*vec4(vp,1.);
+ vC=vc;
+}`;
+var shp;
+var vbufsize=4096;
+var vbo,ibo;
+var vb=new Float32Array(vbufsize*7);
+var ib=new Uint16Array(vbufsize*6/4);
+var Mprojection,Mmodelview;
+var primc;
+var kst=[];
+var pos=[15,4,30];
+var ofs=[0.9,3.5,20];
+var mzw=50,mzh=35,ppx,ppy,ex,ey;
+var maz=[];
+
+var Sphere=function()
+{
+ this.x=10-Math.random()*20;
+ this.y=10-Math.random()*20;
+ this.timer=0;this.r=0.2;
+}
+Sphere.prototype.update=function()
+{
+ var d=Math.sqrt((this.x-pp.x)*(this.x-pp.x)+(this.y-pp.y)*(this.y-pp.y));
+ if(d<0.5&&this.timer===0)this.timer=1;
+ if(this.timer>0&&state===0)
+ {
+ ++this.timer;health+=0.01;
+ this.r+=0.02;if(health>1)health=1;
+ }
+ if(this.timer>25)this.timer=-1;
+}
+Sphere.prototype.draw=function(x,y,a)
+{
+ if(this.timer!==-1)pushSphere(x,y,0,this.r,[0,1,0,a*(0.6-this.timer*0.6/25)]);
+}
+
+function createShader(sh,t)
+{
+ var shader=WGL.createShader(t);
+ WGL.shaderSource(shader,sh);
+ WGL.compileShader(shader);
+ if(!WGL.getShaderParameter(shader,WGL.COMPILE_STATUS))
+ {
+ alert("shader error..."+WGL.getShaderInfoLog(shader));
+ return null;
+ }
+ return shader;
+}
+function pushQuad(a)
+{
+ if(primc>=vbufsize/4)batchGL();
+ for(var i=0;i<4;++i)
+ for(var j=0;j<7;++j)vb[primc*7*4+i*7+j]=a[i*7+j];
+ ++primc;
+}
+function cube(x,y,z,l,r,g,b,a)
+{
+ var L=x-l/2,R=x+l/2;
+ var B=y-l/2,T=y+l/2;
+ var N=z-l/2,F=z+l/2;
+ pushQuad([
+ L,B,N,r,g,b,a,
+ L,T,N,r,g,b,a,
+ R,T,N,r,g,b,a,
+ R,B,N,r,g,b,a
+ ]);
+ pushQuad([
+ L,B,F,r,g,b,a,
+ L,T,F,r,g,b,a,
+ R,T,F,r,g,b,a,
+ R,B,F,r,g,b,a
+ ]);
+ pushQuad([
+ L,B,N,r,g,b,a,
+ L,T,N,r,g,b,a,
+ L,T,F,r,g,b,a,
+ L,B,F,r,g,b,a
+ ]);
+ pushQuad([
+ R,B,N,r,g,b,a,
+ R,T,N,r,g,b,a,
+ R,T,F,r,g,b,a,
+ R,B,F,r,g,b,a
+ ]);
+ pushQuad([
+ L,B,N,r,g,b,a,
+ R,B,N,r,g,b,a,
+ R,B,F,r,g,b,a,
+ L,B,F,r,g,b,a
+ ]);
+ pushQuad([
+ L,T,N,r,g,b,a,
+ R,T,N,r,g,b,a,
+ R,T,F,r,g,b,a,
+ L,T,F,r,g,b,a
+ ]);
+}
+function pushSphere(x,y,z,r,col)
+{
+ for(var i=0;i<12;++i)
+ for(var j=0;j<12;++j)
+ {
+ var r1=r*Math.sin(i*Math.PI/12);
+ var a=new v3d(x+r1*Math.cos(j*Math.PI/12*2),y+r1*Math.sin(j*Math.PI/12*2),z+r*Math.cos(i*Math.PI/12));
+ var b=new v3d(x+r1*Math.cos((j+1)*Math.PI/12*2),y+r1*Math.sin((j+1)*Math.PI/12*2),z+r*Math.cos(i*Math.PI/12));
+ r1=r*Math.sin((i+1)*Math.PI/12);
+ var c=new v3d(x+r1*Math.cos(j*Math.PI/12*2),y+r1*Math.sin(j*Math.PI/12*2),z+r*Math.cos((i+1)*Math.PI/12));
+ var d=new v3d(x+r1*Math.cos((j+1)*Math.PI/12*2),y+r1*Math.sin((j+1)*Math.PI/12*2),z+r*Math.cos((i+1)*Math.PI/12));
+ pushQuad([
+ a.x,a.y,a.z,col[0],col[1],col[2],col[3],
+ b.x,b.y,b.z,col[0],col[1],col[2],col[3],
+ d.x,d.y,d.z,col[0],col[1],col[2],col[3],
+ c.x,c.y,c.z,col[0],col[1],col[2],col[3]
+ ]);
+ }
+}
+function randint(c)
+{return Math.floor(Math.random()*c);}
+function genmaze()
+{
+ for(var i=0;i<mzw;++i)
+ {
+ maz[i]=[];
+ for(var j=0;j<mzh;++j)maz[i][j]=false;
+ }
+ var dx=[0,0,-1,1],
+ dy=[1,-1,0,0];
+ var lst=[];
+ var cx=randint(mzw),cy=randint(mzh);
+ lst.push({x:cx,y:cy,z:cx,w:cy});
+ while(lst.length)
+ {
+ var rm=lst.splice(randint(lst.length),1);
+ var x=rm[0].z,y=rm[0].w;
+ if(maz[x][y]==false)
+ {
+ maz[x][y]=maz[rm[0].x][rm[0].y]=true;
+ for(var i=0;i<4;++i)
+ {
+ cx=x+dx[i]*2;cy=y+dy[i]*2;
+ if(cx>=0&&cy>=0&&cx<mzw&&cy<mzh&&
+ maz[cx][cy]==false)
+ lst.push({x:x+dx[i],y:y+dy[i],z:cx,w:cy});
+ }
+ }
+ }
+ for(var i=0;i<mzh;++i)maz[0][i]=maz[mzw-1][i]=false;
+ for(var i=0;i<mzw;++i)maz[i][0]=maz[i][mzh-1]=false;
+ for(var i=0;i<mzh;++i){if(maz[1][i])lst.push({x:1,y:i});if(maz[mzw-2][i])lst.push({x:mzw-2,y:i});}
+ for(var i=0;i<mzw;++i){if(maz[i][1])lst.push({x:i,y:1});if(maz[i][mzh-2])lst.push({x:i,y:mzh-2});}
+ if(lst.length<2)return genmaze();
+ var rm=lst.splice(randint(lst.length),1);
+ ppx=rm[0].x,ppy=rm[0].y;
+ rm=lst.splice(randint(lst.length),1);
+ ex=rm[0].x,ey=rm[0].y;
+}
+function init()
+{
+ cvs=document.getElementById("glCvs");
+ if(!window.devicePixelRatio)window.devicePixelRatio=1;
+ cvs.width=window.innerWidth;
+ cvs.height=window.innerHeight;
+ cvs.style.width=cvs.width+"px";
+ cvs.style.height=cvs.height+"px";
+ cvs.width=cvs.width*window.devicePixelRatio;
+ cvs.height=cvs.height*window.devicePixelRatio;
+ vpw=cvs.width;vph=cvs.height;
+ try
+ {WGL=cvs.getContext("webgl")||cvs.getContext("experimental-webgl");}
+ catch(e){WGL=null;}
+ if(!WGL){alert("WebGL is not supported by your browser...");return;}
+
+ WGL.clearColor(0.5,0.5,0.5,1.0);
+ WGL.clearDepth(1);
+ WGL.enable(WGL.DEPTH_TEST);
+ WGL.depthFunc(WGL.LESS);
+ WGL.enable(WGL.BLEND);
+ WGL.blendFunc(WGL.SRC_ALPHA,WGL.ONE_MINUS_SRC_ALPHA);
+ WGL.clear(WGL.COLOR_BUFFER_BIT|WGL.DEPTH_BUFFER_BIT);
+ WGL.viewport(0,0,cvs.width,cvs.height);
+
+ shp=WGL.createProgram();
+ var fshs=createShader(fsh,WGL.FRAGMENT_SHADER);
+ var vshs=createShader(vsh,WGL.VERTEX_SHADER);
+ WGL.attachShader(shp,vshs);WGL.attachShader(shp,fshs);
+ WGL.linkProgram(shp);
+ if(!WGL.getProgramParameter(shp,WGL.LINK_STATUS))
+ {
+ alert("shader link error...");
+ }
+ WGL.useProgram(shp);
+
+ vbo=WGL.createBuffer();
+ WGL.bindBuffer(WGL.ARRAY_BUFFER,vbo);
+ WGL.bufferData(WGL.ARRAY_BUFFER,vb,WGL.STATIC_DRAW);
+ var vpp=WGL.getAttribLocation(shp,"vp");
+ var vcp=WGL.getAttribLocation(shp,"vc");
+ WGL.enableVertexAttribArray(vpp);
+ WGL.enableVertexAttribArray(vcp);
+ WGL.bindBuffer(WGL.ARRAY_BUFFER,vbo);
+ WGL.vertexAttribPointer(vpp,3,WGL.FLOAT,false,7*4,0);
+ WGL.vertexAttribPointer(vcp,4,WGL.FLOAT,false,7*4,3*4);
+
+ for(var i=0,n=0,p=0;i<vbufsize/4;++i)
+ {
+ ib[p++]=n;ib[p++]=n+1;
+ ib[p++]=n+2;ib[p++]=n+2;
+ ib[p++]=n+3;ib[p++]=n;
+ n+=4;
+ }
+ ibo=WGL.createBuffer();
+ WGL.bindBuffer(WGL.ELEMENT_ARRAY_BUFFER,ibo);
+ WGL.bufferData(WGL.ELEMENT_ARRAY_BUFFER,ib,WGL.STATIC_DRAW);
+
+ document.addEventListener('keydown',function(e){kst[e.code]=1;});
+ document.addEventListener('keyup',function(e)
+ {
+ kst[e.code]=0;
+ if(e.code=='KeyD'){if(ppx+1<mzw&&maz[ppx+1][ppy])++ppx;}
+ if(e.code=='KeyA'){if(ppx-1>=0&&maz[ppx-1][ppy])--ppx;}
+ if(e.code=='KeyW'){if(ppy+1<mzh&&maz[ppx][ppy+1])++ppy;}
+ if(e.code=='KeyS'){if(ppy-1>=0&&maz[ppx][ppy-1])--ppy;}
+ });
+ genmaze();
+ requestAnimationFrame(mainloop);
+}
+
+function mainloop()
+{
+ const ofx=-9,ofy=-11;
+ WGL.clearColor(0.5,0.5,0.5,1.0);
+ WGL.clearDepth(1);
+ WGL.clear(WGL.COLOR_BUFFER_BIT|WGL.DEPTH_BUFFER_BIT);
+ primc=0;
+ Mmodelview=buildIdentityMatrix();
+
+ Mmodelview=buildLookAtMatrix(pos,[15,10,0],[0,0,1]);
+ for(var i=0;i<mzw;++i)
+ for(var j=0;j<mzh;++j)
+ if(!maz[i][j])cube(i+ofx,j+ofy,0,1,0.1,0.1,0.1,1);
+
+ cube(ppx+ofx,ppy+ofy,0,0.6,0.1,0.8,0.1,1);
+ cube(ex+ofx,ey+ofy,0,0.8,0.4,0.9,0.9,1);
+
+ batchGL();
+
+ requestAnimationFrame(mainloop);
+}
+
+function batchGL()
+{
+ Mprojection=buildProjectionMatrix3D(vpw,vph,60,0.1,100);
+ var mpp=WGL.getUniformLocation(shp,"mprojection");
+ WGL.uniformMatrix4fv(mpp,false,Mprojection);
+ var mvpp=WGL.getUniformLocation(shp,"mmodelview");
+ WGL.uniformMatrix4fv(mvpp,false,Mmodelview);
+ WGL.bindBuffer(WGL.ARRAY_BUFFER,vbo);
+ WGL.bufferData(WGL.ARRAY_BUFFER,vb,WGL.STATIC_DRAW);
+ WGL.drawElements(WGL.TRIANGLES,6*primc,WGL.UNSIGNED_SHORT,0);
+ primc=0;
+}
diff --git a/xp/cgxp/wglmath.js b/xp/cgxp/wglmath.js
new file mode 100644
index 0000000..1b9b9e3
--- /dev/null
+++ b/xp/cgxp/wglmath.js
@@ -0,0 +1,102 @@
+//Copyright Chris Xiong 2018
+//License: Expat (MIT)
+var v3d=function(x,y,z)
+{
+ this.x=(x!==undefined)?x:0;
+ this.y=(y!==undefined)?y:0;
+ this.z=(z!==undefined)?z:0;
+}
+v3d.prototype.l=function(){return Math.sqrt(this.x*this.x+this.y*this.y+this.z*this.z);}
+v3d.prototype.n=function(){var L=this.l();if(L==0)return new v3d();return new v3d(this.x/L,this.y/L,this.z/L);}
+v3d.prototype.ms=function(s)
+{
+ return new v3d(this.x*s,this.y*s,this.z*s);
+}
+v3d.prototype.mm=function(m)
+{
+ return new v3d(
+ m[0]*this.x+m[4]*this.y+m[8]*this.z,
+ m[1]*this.x+m[5]*this.y+m[9]*this.z,
+ m[2]*this.x+m[6]*this.y+m[10]*this.z
+ );
+}
+v3d.prototype.add=function(b)
+{
+ return new v3d(this.x+b.x,this.y+b.y,this.z+b.z);
+}
+v3d.prototype.subtract=function(b)
+{
+ return new v3d(this.x-b.x,this.y-b.y,this.z-b.z);
+}
+v3d.prototype.dot=function(b)
+{
+ return this.x*b.x+this.y*b.y+this.z*b.z;
+}
+v3d.prototype.cross=function(b)
+{
+ return new v3d(
+ this.y*b.z-this.z*b.y,
+ this.z*b.x-this.x*b.z,
+ this.x*b.y-this.y*b.x
+ );
+}
+function buildIdentityMatrix()
+{
+ var m=new Float32Array(16);
+ for(var i=0;i<4;++i)m[i*4+i]=1.;
+ return m;
+}
+function buildProjectionMatrix2D(w,h)
+{
+ var m=buildIdentityMatrix();
+ m[0]=2/w;m[5]=2/h;m[10]=-2;
+ m[12]=m[13]=m[14]=-1;
+ return m;
+}
+function buildProjectionMatrix3D(w,h,fov,near,far)
+{
+ var m=new Float32Array(16);
+ var f=1./Math.tan(Math.PI*fov/360.);
+ var ar=w/h;
+ m[0]=f/ar;m[5]=f;m[10]=(far+near)/(near-far);
+ m[11]=-1.;m[14]=(2*far*near)/(near-far);
+ return m;
+}
+function buildTranslationMatrix(x,y,z)
+{
+ var m=buildIdentityMatrix();
+ m[12]=x;m[13]=y;m[14]=z;
+ return m;
+}
+function buildRotationMatrix(a,x,y,z)
+{
+ var m=buildIdentityMatrix();
+ //check (x,y,z) here
+ var c=Math.cos(a),s=Math.sin(a);
+ m[0]=x*x*(1-c)+c;m[4]=x*y*(1-c)-z*s;m[8]=x*z*(1-c)+y*s;
+ m[1]=y*x*(1-c)+z*s;m[5]=y*y*(1-c)+c;m[9]=y*z*(1-c)-x*s;
+ m[2]=x*z*(1-c)-y*s;m[6]=y*z*(1-c)+x*s;m[10]=z*x*(1-c)+c;
+ m[15]=1.;
+ return m;
+}
+function buildLookAtMatrix(e,a,u)
+{
+ var f=new v3d(a[0]-e[0],a[1]-e[1],a[2]-e[2]).n();
+ var up=new v3d(u[0],u[1],u[2]).n();
+ var r=f.cross(up).n();var p=r.cross(f);
+ var m=buildIdentityMatrix();
+ m[0]=r.x;m[4]=r.y;m[8]=r.z;
+ m[1]=p.x;m[5]=p.y;m[9]=p.z;
+ m[2]=-f.x;m[6]=-f.y;m[10]=-f.z;
+ m=multMatrix(m,buildTranslationMatrix(-e[0],-e[1],-e[2]));
+ return m;
+}
+function multMatrix(a,b)
+{
+ var r=new Float32Array(16);
+ for(var i=0;i<4;++i)
+ for(var j=0;j<4;++j)
+ for(var k=0;k<4;++k)
+ r[i*4+j]+=a[i*4+k]*b[k*4+j];
+ return r;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 12:57:51 +0000