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renderer.js
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renderer.js
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/**
* Simplified webGL renderer
*/
$3Dmol.Renderer = function(parameters) {
parameters = parameters || {};
this.row = parameters.row;
this.col = parameters.col;
this.rows = parameters.rows;
this.cols = parameters.cols;
var _canvas = parameters.canvas !== undefined ? parameters.canvas
: document.createElement('canvas'),
_precision = parameters.precision !== undefined ? parameters.precision
: 'highp', _alpha = parameters.alpha !== undefined ? parameters.alpha
: true, _premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha
: true, _antialias = parameters.antialias !== undefined ? parameters.antialias
: false, _stencil = parameters.stencil !== undefined ? parameters.stencil
: true, _preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer
: false, _clearColor = parameters.clearColor !== undefined ? new $3Dmol.Color(
parameters.clearColor) : new $3Dmol.Color(0x000000),
_clearAlpha = parameters.clearAlpha !== undefined ? parameters.clearAlpha : 0,
_outlineMaterial = new $3Dmol.MeshOutlineMaterial(parameters.outline),
_outlineSphereImposterMaterial = new $3Dmol.SphereImposterOutlineMaterial(parameters.outline),
_outlineStickImposterMaterial = new $3Dmol.StickImposterOutlineMaterial(parameters.outline),
_outlineEnabled = !!parameters.outline
;
this.domElement = _canvas;
this.context = null;
this.devicePixelRatio = parameters.devicePixelRatio !== undefined ? parameters.devicePixelRatio
: (self.devicePixelRatio !== undefined) ? self.devicePixelRatio : 1;
// clearing
_canvas.id=parameters.id;
this.autoClear = true;
this.autoClearColor = true;
this.autoClearDepth = true;
this.autoClearStencil = true;
// scene graph
this.sortObjects = true;
this.autoUpdateObjects = true;
this.autoUpdateScene = true;
this.renderPluginsPost = [];
// info
this.info = {
memory : {
programs : 0,
geometries : 0,
textures : 0
},
render : {
calls : 0,
vertices : 0,
faces : 0,
points : 0
}
};
// internal properties
var _this = this,
_programs = [], _programs_counter = 0,
// internal state cache
_currentProgram = null, _currentFramebuffer = null, _currentMaterialId = -1, _currentGeometryGroupHash = null, _currentCamera = null, _geometryGroupCounter = 0,
_usedTextureUnits = 0,
// GL state cache
_oldDoubleSided = -1, _oldFlipSided = -1,
_oldBlending = -1,
_oldBlendEquation = -1, _oldBlendSrc = -1, _oldBlendDst = -1,
_oldDepthTest = -1, _oldDepthWrite = -1,
_oldPolygonOffset = null, _oldPolygonOffsetFactor = null, _oldPolygonOffsetUnits = null,
_oldLineWidth = null,
_viewportWidth = 0, _viewportHeight = 0, _currentWidth = 0, _currentHeight = 0,
_enabledAttributes = {},
// camera matrices cache
_projScreenMatrix = new $3Dmol.Matrix4(),
_vector3 = new $3Dmol.Vector3(),
// light arrays cache
_direction = new $3Dmol.Vector3(),
_lightsNeedUpdate = true,
_lights = {
ambient : [ 0, 0, 0 ],
directional : {
length : 0,
colors : [],
positions : []
},
point : {
length : 0,
colors : [],
positions : [],
distances : []
},
spot : {
length : 0,
colors : [],
positions : [],
distances : [],
directions : [],
anglesCos : [],
exponents : []
},
hemi : {
length : 0,
skyColors : [],
groundColors : [],
positions : []
}
};
// initialize
var _gl;
initGL();
setDefaultGLState();
this.context = _gl;
var _extInstanced = _gl.getExtension("ANGLE_instanced_arrays");
var _extFragDepth = _gl.getExtension("EXT_frag_depth");
// API
this.supportedExtensions = function() {
return {supportsAIA: Boolean(_extInstanced),
supportsImposters: Boolean(_extFragDepth)
};
};
this.getContext = function() {
return _gl;
};
this.getPrecision = function() {
return _precision;
};
this.setClearColorHex = function(hex, alpha) {
_clearColor.setHex(hex);
_clearAlpha = alpha;
_gl.clearColor(_clearColor.r, _clearColor.g, _clearColor.b,
_clearAlpha);
};
this.enableOutline = function(parameters) {
_outlineMaterial = new $3Dmol.MeshOutlineMaterial(parameters);
_outlineSphereImposterMaterial = new $3Dmol.SphereImposterOutlineMaterial(parameters);
_outlineStickImposterMaterial = new $3Dmol.StickImposterOutlineMaterial(parameters);
_outlineEnabled = true;
};
this.disableOutline = function() {
_outlineEnabled = false;
};
this.setViewport = function(){
if(this.rows != undefined && this.cols != undefined && this.row != undefined && this.col != undefined){
var wid = _canvas.width/this.cols;
var hei = _canvas.height/this.rows;
_viewportWidth = wid * this.devicePixelRatio;
_viewportHeight = hei * this.devicePixelRatio;
_gl.drawingBufferWidth = _viewportWidth*3;
_gl.drawingBufferHeight = _viewportHeight;
_gl.enable(_gl.SCISSOR_TEST);
_gl.scissor(wid*this.col,hei * this.row, wid, hei);
_gl.viewport(wid * this.col , hei * this.row, wid, hei);
}
}
this.setSize = function(width, height) {
if(this.rows != undefined && this.cols != undefined && this.row != undefined && this.col != undefined){
var wid = width/this.cols;
var hei = height/this.rows;
_canvas.width =width* this.devicePixelRatio;
_canvas.height = height*this.devicePixelRatio;
_viewportWidth = wid * this.devicePixelRatio;
_viewportHeight = hei * this.devicePixelRatio;
_canvas.style.width = width + 'px';
_canvas.style.height = height + 'px';
this.setViewport();
}else{
_viewportWidth = _canvas.width = width * this.devicePixelRatio;
_viewportHeight = _canvas.height = height * this.devicePixelRatio;
_canvas.style.width = width + 'px';
_canvas.style.height = height + 'px';
_gl.viewport(0, 0, _gl.drawingBufferWidth, _gl.drawingBufferHeight);
}
};
this.clear = function(color, depth, stencil) {
var bits = 0;
if (color === undefined || color)
bits |= _gl.COLOR_BUFFER_BIT;
if (depth === undefined || depth)
bits |= _gl.DEPTH_BUFFER_BIT;
if (stencil === undefined || stencil)
bits |= _gl.STENCIL_BUFFER_BIT;
_gl.clear(bits);
};
this.clearTarget = function(color, depth, stencil) {
this.clear(color, depth, stencil);
};
this.setMaterialFaces = function(material, reflected) {
var doubleSided = material.side === $3Dmol.DoubleSide;
var flipSided = material.side === $3Dmol.BackSide;
flipSided = reflected ? !flipSided : flipSided;
if (_oldDoubleSided !== doubleSided) {
if (doubleSided) {
_gl.disable(_gl.CULL_FACE);
} else {
_gl.enable(_gl.CULL_FACE);
}
_oldDoubleSided = doubleSided;
}
if (_oldFlipSided !== flipSided) {
if (flipSided) {
_gl.frontFace(_gl.CW);
} else {
_gl.frontFace(_gl.CCW);
}
_oldFlipSided = flipSided;
}
};
this.setDepthTest = function(depthTest) {
if (_oldDepthTest !== depthTest) {
if (depthTest) {
_gl.enable(_gl.DEPTH_TEST);
} else {
_gl.disable(_gl.DEPTH_TEST);
}
_oldDepthTest = depthTest;
}
};
this.setDepthWrite = function(depthWrite) {
if (_oldDepthWrite !== depthWrite) {
_gl.depthMask(depthWrite);
_oldDepthWrite = depthWrite;
}
};
this.setBlending = function(blending) {
if (!blending) {
_gl.disable(_gl.BLEND);
} else {
_gl.enable(_gl.BLEND);
_gl.blendEquationSeparate(_gl.FUNC_ADD, _gl.FUNC_ADD);
_gl.blendFuncSeparate(_gl.SRC_ALPHA, _gl.ONE_MINUS_SRC_ALPHA,
_gl.ONE, _gl.ONE_MINUS_SRC_ALPHA);
}
_oldBlending = blending;
};
// Plugins
this.addPostPlugin = function(plugin) {
plugin.init(this);
this.renderPluginsPost.push(plugin);
};
// Sorting
function numericalSort(a, b) {
return b[0] - a[0];
}
function enableAttribute(attribute) {
if (!_enabledAttributes[attribute]) {
_gl.enableVertexAttribArray(attribute);
_enabledAttributes[attribute] = true;
}
}
function disableAttributes() {
for ( var attribute in _enabledAttributes) {
if (_enabledAttributes[attribute]) {
_gl.disableVertexAttribArray(attribute);
_enabledAttributes[attribute] = false;
}
}
}
function setPolygonOffset(polygonOffset, factor, units) {
if (_oldPolygonOffset !== polygonOffset) {
if (polygonOffset)
_gl.enable(_gl.POLYGON_OFFSET_FILL);
else
_gl.disable(_gl.POLYGON_OFFSET_FILL);
}
}
function setLineWidth(width) {
if (width !== _oldLineWidth) {
_gl.lineWidth(width);
_oldLineWidth = width;
}
}
var onGeometryDispose = function(event) {
var geometry = event.target;
geometry.removeEventListener('dispose', onGeometryDispose);
deallocateGeometry(geometry);
_this.info.memory.geometries--;
};
var onTextureDispose = function(event) {
var texture = event.target;
texture.removeEventListener('dispose', onTextureDispose);
deallocateTexture(texture);
_this.info.memory.textures--;
};
var onMaterialDispose = function(event) {
var material = event.target;
material.removeEventListener('dispose', onMaterialDispose);
deallocateMaterial(material);
};
var deallocateGeometry = function(geometry) {
geometry.__webglInit = undefined;
if (geometry.__webglVertexBuffer !== undefined)
_gl.deleteBuffer(geometry.__webglVertexBuffer);
if (geometry.__webglColorBuffer !== undefined)
_gl.deleteBuffer(geometry.__webglColorBuffer);
if (geometry.geometryGroups !== undefined) {
for (var g = 0, gl = geometry.groups; g < gl; g++) {
var geometryGroup = geometry.geometryGroups[g];
if (geometryGroup.__webglVertexBuffer !== undefined)
_gl.deleteBuffer(geometryGroup.__webglVertexBuffer);
if (geometryGroup.__webglColorBuffer !== undefined)
_gl.deleteBuffer(geometryGroup.__webglColorBuffer);
if (geometryGroup.__webglNormalBuffer !== undefined)
_gl.deleteBuffer(geometryGroup.__webglNormalBuffer);
if (geometryGroup.__webglFaceBuffer !== undefined)
_gl.deleteBuffer(geometryGroup.__webglFaceBuffer);
if (geometryGroup.__webglLineBuffer !== undefined)
_gl.deleteBuffer(geometryGroup.__webglLineBuffer);
}
}
};
var deallocateMaterial = function(material) {
var program = material.program;
if (program === undefined)
return;
material.program = undefined;
// only deallocate GL program if this was the last use of shared program
// assumed there is only single copy of any program in the _programs
// list
// (that's how it's constructed)
var i, il, programInfo;
var deleteProgram = false;
for (i = 0, il = _programs.length; i < il; i++) {
programInfo = _programs[i];
if (programInfo.program === program) {
programInfo.usedTimes--;
if (programInfo.usedTimes === 0) {
deleteProgram = true;
}
break;
}
}
if (deleteProgram === true) {
// avoid using array.splice, this is costlier than creating new
// array from scratch
var newPrograms = [];
for (i = 0, il = _programs.length; i < il; i++) {
programInfo = _programs[i];
if (programInfo.program !== program) {
newPrograms.push(programInfo);
}
}
_programs = newPrograms;
_gl.deleteProgram(program);
_this.info.memory.programs--;
}
};
var deallocateTexture = function(texture) {
if (texture.image && texture.image.__webglTextureCube) {
// cube texture
_gl.deleteTexture(texture.image.__webglTextureCube);
}
else {
// 2D texture
if (!texture.__webglInit)
return;
texture.__webglInit = false;
_gl.deleteTexture(texture.__webglTexture);
}
};
// Compile and return shader
function getShader(type, str) {
var shader;
if (type === "fragment")
shader = _gl.createShader(_gl.FRAGMENT_SHADER);
else if (type === "vertex")
shader = _gl.createShader(_gl.VERTEX_SHADER);
_gl.shaderSource(shader, str);
_gl.compileShader(shader);
if (!_gl.getShaderParameter(shader, _gl.COMPILE_STATUS)) {
console.error(_gl.getShaderInfoLog(shader));
console.error("could not initialize shader");
return null;
}
return shader;
}
// Compile appropriate shaders (if necessary) from source code and attach to
// gl program.
function buildProgram(fragmentShader, vertexShader, uniforms, parameters) {
var p, pl, d, program, code;
var chunks = [];
chunks.push(fragmentShader);
chunks.push(vertexShader);
for (p in parameters) {
chunks.push(p);
chunks.push(parameters[p]);
}
code = chunks.join();
// check if program has already been compiled
for (p = 0, pl = _programs.length; p < pl; p++) {
var programInfo = _programs[p];
if (programInfo.code === code) {
programInfo.usedTimes++;
return programInfo.program;
}
}
// Set up new program and compile shaders
program = _gl.createProgram();
// set up precision
var precision = _precision;
var prefix = "precision " + precision + " float;";
var prefix_vertex = [ prefix ].join("\n");
var prefix_fragment = [
parameters.fragdepth ? "#extension GL_EXT_frag_depth: enable"
: "",
parameters.wireframe ? "#define WIREFRAME 1" : "", prefix ]
.join("\n");
var glFragmentShader = getShader("fragment", prefix_fragment
+ fragmentShader);
var glVertexShader = getShader("vertex", prefix_vertex + vertexShader);
_gl.attachShader(program, glVertexShader);
_gl.attachShader(program, glFragmentShader);
_gl.linkProgram(program);
if (!_gl.getProgramParameter(program, _gl.LINK_STATUS))
console.error("Could not initialize shader");
// gather and cache uniform variables and attributes
program.uniforms = {};
program.attributes = {};
var identifiers, u, a, i;
// uniform vars
identifiers = [ 'viewMatrix', 'modelViewMatrix', 'projectionMatrix',
'normalMatrix'];
// custom uniform vars
for (u in uniforms)
identifiers.push(u);
for (i = 0; i < identifiers.length; i++) {
var uniformVar = identifiers[i];
program.uniforms[uniformVar] = _gl.getUniformLocation(program,
uniformVar);
}
// attributes
identifiers = [ 'position', 'normal', 'color', 'lineDistance',
'offset', 'radius' ];
/*
* for (a in attributes) identifiers.push(a);
*/
for (i = 0; i < identifiers.length; i++) {
var attributeVar = identifiers[i];
program.attributes[attributeVar] = _gl.getAttribLocation(program,
attributeVar);
}
program.id = _programs_counter++;
_programs.push({
program : program,
code : code,
usedTimes : 1
});
_this.info.memory.programs = _programs.length;
return program;
}
// TODO: need to set up shader attributes and uniforms as attributes on
// material object after attaching prgm
// We need to attach appropriate uniform variables to material after shaders
// have been chosen
this.initMaterial = function(material, lights, fog, object) {
material.addEventListener('dispose', onMaterialDispose);
var u, a, identifiers, i, parameters, maxLightCount, maxBones, maxShadows, shaderID;
shaderID = material.shaderID;
if (shaderID) {
var shader = $3Dmol.ShaderLib[shaderID];
material.vertexShader = shader.vertexShader;
material.fragmentShader = shader.fragmentShader;
material.uniforms = $3Dmol.ShaderUtils.clone(shader.uniforms);
// TODO: set material uniforms to shader uniform variables
}
parameters = {
wireframe : material.wireframe,
fragdepth : material.imposter
};
material.program = buildProgram(material.fragmentShader,
material.vertexShader, material.uniforms, parameters);
};
function setProgram(camera, lights, fog, material, object) {
if (material.needsUpdate) {
if (material.program)
deallocateMaterial(material);
_this.initMaterial(material, lights, fog, object);
material.needsUpdate = false;
}
var refreshMaterial = false;
// p_uniforms: uniformVarName => uniformLocation
// m_uniforms: uniformVarName => uniformJsVal
var program = material.program, p_uniforms = program.uniforms, m_uniforms = material.uniforms;
if (program != _currentProgram) {
_gl.useProgram(program);
_currentProgram = program;
refreshMaterial = true;
}
if (material.id != _currentMaterialId) {
_currentMaterialId = material.id;
refreshMaterial = true;
}
if (camera != _currentCamera) {
_currentCamera = camera;
refreshMaterial = true;
}
_gl.uniformMatrix4fv(p_uniforms.projectionMatrix, false,
camera.projectionMatrix.elements);
_gl.uniformMatrix4fv(p_uniforms.modelViewMatrix, false,
object._modelViewMatrix.elements);
_gl.uniformMatrix3fv(p_uniforms.normalMatrix, false,
object._normalMatrix.elements);
// Send projection matrix to uniform variable in shader
if (refreshMaterial) {
// Load projection, model-view matrices for perspective
// Set up correct fog uniform vals
m_uniforms.fogColor.value = fog.color;
m_uniforms.fogNear.value = fog.near;
m_uniforms.fogFar.value = fog.far;
// Set up lights for lambert shader
if (material.shaderID.startsWith("lambert")
|| material.shaderID === "instanced"
|| material.shaderID.endsWith("imposter")) {
// load view and normal matrices for directional and object
// lighting
_gl.uniformMatrix4fv(p_uniforms.viewMatrix, false,
camera.matrixWorldInverse.elements);
if (_lightsNeedUpdate) {
setupLights(program, lights);
_lightsNeedUpdate = false;
}
// Set up correct light uniform var vals
m_uniforms.directionalLightColor.value = _lights.directional.colors;
m_uniforms.directionalLightDirection.value = _lights.directional.positions;
} else if (material.shaderID.endsWith("outline")) {
m_uniforms.outlineColor.value = material.outlineColor;
m_uniforms.outlineWidth.value = material.outlineWidth;
m_uniforms.outlinePushback.value = material.outlinePushback;
} else if (material.shaderID === "sphereimposter") {
_gl.uniformMatrix4fv(p_uniforms.viewMatrix, false,
camera.matrixWorldInverse.elements);
_gl.uniformMatrix3fv(p_uniforms.normalMatrix, false,
object._normalMatrix.elements);
m_uniforms.directionalLightColor.value = _lights.directional.colors;
m_uniforms.directionalLightDirection.value = _lights.directional.positions;
}
// opacity, diffuse, emissive, etc
m_uniforms.opacity.value = material.opacity;
// Load any other material specific uniform variables to gl shaders
loadMaterialUniforms(p_uniforms, m_uniforms);
}
return program;
}
function loadMaterialUniforms(p_uniforms, m_uniforms) {
var uniformVar, type, uniformVal, uniformLoc;
for (uniformVar in m_uniforms) {
if (!p_uniforms[uniformVar])
continue;
type = m_uniforms[uniformVar].type;
uniformVal = m_uniforms[uniformVar].value;
uniformLoc = p_uniforms[uniformVar];
// single float
if (type === 'f')
_gl.uniform1f(uniformLoc, uniformVal);
// array of floats
else if (type === 'fv')
_gl.uniform3fv(uniformLoc, uniformVal);
// color - r,g,b floats
else if (type === 'c')
_gl.uniform3f(uniformLoc, uniformVal.r, uniformVal.g,
uniformVal.b);
else if (type === 'f4')
_gl.uniform4f(uniformLoc, uniformVal[0], uniformVal[1],
uniformVal[2],uniformVal[3]);
}
}
this.renderBuffer = function(camera, lights, fog, material, geometryGroup,
object) {
if (!material.visible)
return;
var program, attributes, linewidth, primitives, a, attribute, i, il;
// Sets up proper vertex and fragment shaders and attaches them to webGL
// program
// Also sets appropriate uniform variables
program = setProgram(camera, lights, fog, material, object);
attributes = program.attributes;
var updateBuffers = false, wireframeBit = material.wireframe ? 1 : 0, geometryGroupHash = (geometryGroup.id * 0xffffff)
+ (program.id * 2) + wireframeBit;
if (geometryGroupHash !== _currentGeometryGroupHash) {
_currentGeometryGroupHash = geometryGroupHash;
updateBuffers = true;
}
// rebind shader attributes to appropriate (and already initialized) gl
// buffers
if (updateBuffers) {
disableAttributes();
// Vertices
if (attributes.position >= 0) {
_gl.bindBuffer(_gl.ARRAY_BUFFER,
geometryGroup.__webglVertexBuffer);
enableAttribute(attributes.position);
_gl.vertexAttribPointer(attributes.position, 3, _gl.FLOAT,
false, 0, 0);
}
// Colors
if (attributes.color >= 0) {
_gl.bindBuffer(_gl.ARRAY_BUFFER,
geometryGroup.__webglColorBuffer);
enableAttribute(attributes.color);
_gl.vertexAttribPointer(attributes.color, 3, _gl.FLOAT, false,
0, 0);
}
// Normals
if (attributes.normal >= 0) {
_gl.bindBuffer(_gl.ARRAY_BUFFER,
geometryGroup.__webglNormalBuffer);
enableAttribute(attributes.normal);
_gl.vertexAttribPointer(attributes.normal, 3, _gl.FLOAT, false,
0, 0);
}
// Offsets (Instanced only)
if (attributes.offset >= 0) {
_gl.bindBuffer(_gl.ARRAY_BUFFER,
geometryGroup.__webglOffsetBuffer);
enableAttribute(attributes.offset);
_gl.vertexAttribPointer(attributes.offset, 3, _gl.FLOAT, false,
0, 0);
}
// Radii (Instanced only)
if (attributes.radius >= 0) {
_gl.bindBuffer(_gl.ARRAY_BUFFER,
geometryGroup.__webglRadiusBuffer);
enableAttribute(attributes.radius);
_gl.vertexAttribPointer(attributes.radius, 1, _gl.FLOAT, false,
0, 0);
}
}
// Render
var faceCount, lineCount;
// lambert shaders - draw triangles
// TODO: make sure geometryGroup's face count is setup correctly
if (object instanceof $3Dmol.Mesh) {
if (material.shaderID === "instanced") {
var sphereGeometryGroup = material.sphere.geometryGroups[0];
if (updateBuffers) {
_gl.bindBuffer(_gl.ARRAY_BUFFER,
geometryGroup.__webglVertexBuffer);
_gl.bufferData(_gl.ARRAY_BUFFER,
sphereGeometryGroup.vertexArray, _gl.STATIC_DRAW);
_gl.bindBuffer(_gl.ARRAY_BUFFER,
geometryGroup.__webglNormalBuffer);
_gl.bufferData(_gl.ARRAY_BUFFER,
sphereGeometryGroup.normalArray, _gl.STATIC_DRAW);
_gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER,
geometryGroup.__webglFaceBuffer);
_gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER,
sphereGeometryGroup.faceArray, _gl.STATIC_DRAW);
}
faceCount = sphereGeometryGroup.faceidx;
_extInstanced.vertexAttribDivisorANGLE(attributes.offset, 1);
_extInstanced.vertexAttribDivisorANGLE(attributes.radius, 1);
_extInstanced.vertexAttribDivisorANGLE(attributes.color, 1);
_extInstanced.drawElementsInstancedANGLE(_gl.TRIANGLES,
faceCount, _gl.UNSIGNED_SHORT, 0,
geometryGroup.radiusArray.length);
_extInstanced.vertexAttribDivisorANGLE(attributes.offset, 0);
_extInstanced.vertexAttribDivisorANGLE(attributes.radius, 0);
_extInstanced.vertexAttribDivisorANGLE(attributes.color, 0);
}
else if (material.wireframe) {
lineCount = geometryGroup.lineidx;
setLineWidth(material.wireframeLinewidth);
if (updateBuffers)
_gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER,
geometryGroup.__webglLineBuffer);
_gl.drawElements(_gl.LINES, lineCount, _gl.UNSIGNED_SHORT, 0);
}
else {
faceCount = geometryGroup.faceidx;
if (updateBuffers)
_gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER,
geometryGroup.__webglFaceBuffer);
_gl.drawElements(_gl.TRIANGLES, faceCount, _gl.UNSIGNED_SHORT,
0);
}
_this.info.render.calls++;
_this.info.render.vertices += faceCount;
_this.info.render.faces += faceCount / 3;
}
// basic shaders - draw lines
else if (object instanceof $3Dmol.Line) {
lineCount = geometryGroup.vertices;
setLineWidth(material.linewidth);
_gl.drawArrays(_gl.LINES, 0, lineCount);
_this.info.render.calls++;
}
};
// rendering
function renderObjects(renderList, reverse, materialType, camera, lights,
fog, useBlending, overrideMaterial) {
var webglObject, object, buffer, material, start, end, delta;
// Forward or backward render
if (reverse) {
start = renderList.length - 1;
end = -1;
delta = -1;
}
else {
start = 0;
end = renderList.length;