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trekviewer.htm
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<!DOCTYPE HTML>
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(f=k);a.shaderSource(V,f);a.compileShader(V);W=a.createShader(a.FRAGMENT_SHADER);f=pa;"cubemap"==z?(B=a.TEXTURE_CUBE_MAP,f=bb):"multires"==z&&(f=Ra);a.shaderSource(W,f);a.compileShader(W);d=a.createProgram();a.attachShader(d,V);a.attachShader(d,W);a.linkProgram(d);a.getShaderParameter(V,a.COMPILE_STATUS)||console.log(a.getShaderInfoLog(V));a.getShaderParameter(W,a.COMPILE_STATUS)||console.log(a.getShaderInfoLog(W));a.getProgramParameter(d,a.LINK_STATUS)||console.log(a.getProgramInfoLog(d));a.useProgram(d);
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a.LINEAR),a.texParameteri(B,a.TEXTURE_MAG_FILTER,a.LINEAR)):(d.vertPosLocation=a.getAttribLocation(d,"a_vertCoord"),a.enableVertexAttribArray(d.vertPosLocation),Da||(Da=a.createBuffer()),Z||(Z=a.createBuffer()),na||(na=a.createBuffer()),a.bindBuffer(a.ARRAY_BUFFER,Z),a.bufferData(a.ARRAY_BUFFER,new Float32Array([0,0,1,0,1,1,0,1]),a.STATIC_DRAW),a.bindBuffer(a.ELEMENT_ARRAY_BUFFER,na),a.bufferData(a.ELEMENT_ARRAY_BUFFER,new Uint16Array([0,1,2,0,2,3]),a.STATIC_DRAW),d.perspUniform=a.getUniformLocation(d,
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c;A.height=A.clientHeight*c;a&&(1286==a.getError()&&Ca(),a.viewport(0,0,a.drawingBufferWidth,a.drawingBufferHeight),"multires"!=z&&a.uniform1f(d.aspectRatio,A.clientWidth/A.clientHeight))};this.resize();this.setPose=function(a,d){ha=[a,d]};this.render=function(c,f,k,l){var m,e=0;l===p&&(l={});l.roll&&(e=l.roll);if(ha!==p){m=ha[0];var g=ha[1],t=c,x=f,s=Math.cos(g)*Math.sin(c)*Math.sin(m)+Math.cos(c)*(Math.cos(m)*Math.cos(f)+Math.sin(g)*Math.sin(m)*Math.sin(f)),y=-Math.sin(c)*Math.sin(g)+Math.cos(c)*
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d.currentNodes.indexOf(T[c].node)&&(T[c].node.textureLoad=!1,T.splice(c,1));if(0===T.length)for(c=0;c<d.currentNodes.length;c++)if(f=d.currentNodes[c],!f.texture&&!f.textureLoad){f.textureLoad=!0;setTimeout(Ia,0,f);break}if(!d.drawInProgress){d.drawInProgress=!0;a.clear(a.COLOR_BUFFER_BIT);for(c=0;c<d.currentNodes.length;c++)1<d.currentNodes[c].textureLoaded&&(a.bindBuffer(a.ARRAY_BUFFER,Da),a.bufferData(a.ARRAY_BUFFER,new Float32Array(d.currentNodes[c].vertices),a.STATIC_DRAW),a.vertexAttribPointer(d.vertPosLocation,
3,a.FLOAT,!1,0,0),a.bindBuffer(a.ARRAY_BUFFER,Z),a.vertexAttribPointer(d.texCoordLocation,2,a.FLOAT,!1,0,0),a.bindTexture(a.TEXTURE_2D,d.currentNodes[c].texture),a.drawElements(a.TRIANGLES,6,a.UNSIGNED_SHORT,0));d.drawInProgress=!1}}if(l.returnImage!==p)return A.toDataURL("image/png")}else for(m=aa/2,l={f:"translate3d(-"+(m+2)+"px, -"+(m+2)+"px, -"+m+"px)",b:"translate3d("+(m+2)+"px, -"+(m+2)+"px, "+m+"px) rotateX(180deg) rotateZ(180deg)",u:"translate3d(-"+(m+2)+"px, -"+m+"px, "+(m+2)+"px) rotateX(270deg)",
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oa="precision highp float;\nuniform float u_aspectRatio;\nuniform float u_psi;\nuniform float u_theta;\nuniform float u_f;\nuniform float u_h;\nuniform float u_v;\nuniform float u_vo;\nuniform float u_rot;\nconst float PI = 3.14159265358979323846264;\nuniform sampler2D u_image0;\nuniform sampler2D u_image1;\nuniform bool u_splitImage;\nuniform samplerCube u_imageCube;\nvarying vec2 v_texCoord;\nuniform vec4 u_backgroundColor;\nvoid main() {\nfloat x = v_texCoord.x * u_aspectRatio;\nfloat y = v_texCoord.y;\nfloat sinrot = sin(u_rot);\nfloat cosrot = cos(u_rot);\nfloat rot_x = x * cosrot - y * sinrot;\nfloat rot_y = x * sinrot + y * cosrot;\nfloat sintheta = sin(u_theta);\nfloat costheta = cos(u_theta);\nfloat a = u_f * costheta - rot_y * sintheta;\nfloat root = sqrt(rot_x * rot_x + a * a);\nfloat lambda = atan(rot_x / root, a / root) + u_psi;\nfloat phi = atan((rot_y * costheta + u_f * sintheta) / root);",
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