242 lines
9.1 KiB
JavaScript
242 lines
9.1 KiB
JavaScript
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if(!dojo._hasResource["dojox.gfx3d.lighting"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["dojox.gfx3d.lighting"] = true;
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dojo.provide("dojox.gfx3d.lighting");
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dojo.require("dojox.gfx._base");
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(function(){
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var lite = dojox.gfx3d.lighting;
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dojo.mixin(dojox.gfx3d.lighting, {
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// color utilities
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black: function(){
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return {r: 0, g: 0, b: 0, a: 1};
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},
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white: function(){
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return {r: 1, g: 1, b: 1, a: 1};
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},
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toStdColor: function(c){
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c = dojox.gfx.normalizeColor(c);
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return {r: c.r / 255, g: c.g / 255, b: c.b / 255, a: c.a};
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},
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fromStdColor: function(c){
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return new dojo.Color([Math.round(255 * c.r), Math.round(255 * c.g), Math.round(255 * c.b), c.a]);
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},
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scaleColor: function(s, c){
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return {r: s * c.r, g: s * c.g, b: s * c.b, a: s * c.a};
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},
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addColor: function(a, b){
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return {r: a.r + b.r, g: a.g + b.g, b: a.b + b.b, a: a.a + b.a};
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},
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multiplyColor: function(a, b){
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return {r: a.r * b.r, g: a.g * b.g, b: a.b * b.b, a: a.a * b.a};
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},
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saturateColor: function(c){
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return {
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r: c.r < 0 ? 0 : c.r > 1 ? 1 : c.r,
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g: c.g < 0 ? 0 : c.g > 1 ? 1 : c.g,
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b: c.b < 0 ? 0 : c.b > 1 ? 1 : c.b,
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a: c.a < 0 ? 0 : c.a > 1 ? 1 : c.a
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};
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},
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mixColor: function(c1, c2, s){
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return lite.addColor(lite.scaleColor(s, c1), lite.scaleColor(1 - s, c2));
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},
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diff2Color: function(c1, c2){
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var r = c1.r - c2.r;
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var g = c1.g - c2.g;
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var b = c1.b - c2.b;
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var a = c1.a - c2.a;
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return r * r + g * g + b * b + a * a;
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},
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length2Color: function(c){
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return c.r * c.r + c.g * c.g + c.b * c.b + c.a * c.a;
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},
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// vector utilities
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//TODO: move vector utilities from this file to vector.js
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dot: function(a, b){
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return a.x * b.x + a.y * b.y + a.z * b.z;
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},
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scale: function(s, v){
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return {x: s * v.x, y: s * v.y, z: s * v.z};
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},
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add: function(a, b){
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return {x: a.x + b.x, y: a.y + b.y, z: a.z + b.z};
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},
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saturate: function(v){
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return Math.min(Math.max(v, 0), 1);
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},
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length: function(v){
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return Math.sqrt(dojox.gfx3d.lighting.dot(v, v));
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},
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normalize: function(v){
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return lite.scale(1 / lite.length(v), v);
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},
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faceforward: function(n, i){
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var p = dojox.gfx3d.lighting;
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var s = p.dot(i, n) < 0 ? 1 : -1;
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return p.scale(s, n);
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},
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reflect: function(i, n){
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var p = dojox.gfx3d.lighting;
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return p.add(i, p.scale(-2 * p.dot(i, n), n));
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},
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// lighting utilities
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diffuse: function(normal, lights){
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var c = lite.black();
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for(var i = 0; i < lights.length; ++i){
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var l = lights[i],
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d = lite.dot(lite.normalize(l.direction), normal);
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c = lite.addColor(c, lite.scaleColor(d, l.color));
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}
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return lite.saturateColor(c);
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},
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specular: function(normal, v, roughness, lights){
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var c = lite.black();
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for(var i = 0; i < lights.length; ++i){
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var l = lights[i],
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h = lite.normalize(lite.add(lite.normalize(l.direction), v)),
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s = Math.pow(Math.max(0, lite.dot(normal, h)), 1 / roughness);
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c = lite.addColor(c, lite.scaleColor(s, l.color));
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}
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return lite.saturateColor(c);
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},
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phong: function(normal, v, size, lights){
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normal = lite.normalize(normal);
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var c = lite.black();
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for(var i = 0; i < lights.length; ++i){
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var l = lights[i],
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r = lite.reflect(lite.scale(-1, lite.normalize(v)), normal),
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s = Math.pow(Math.max(0, lite.dot(r, lite.normalize(l.direction))), size);
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c = lite.addColor(c, lite.scaleColor(s, l.color));
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}
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return lite.saturateColor(c);
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}
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});
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// this lighting model is derived from RenderMan Interface Specification Version 3.2
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dojo.declare("dojox.gfx3d.lighting.Model", null, {
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constructor: function(incident, lights, ambient, specular){
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this.incident = lite.normalize(incident);
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this.lights = [];
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for(var i = 0; i < lights.length; ++i){
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var l = lights[i];
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this.lights.push({direction: lite.normalize(l.direction), color: lite.toStdColor(l.color)});
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}
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this.ambient = lite.toStdColor(ambient.color ? ambient.color : "white");
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this.ambient = lite.scaleColor(ambient.intensity, this.ambient);
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this.ambient = lite.scaleColor(this.ambient.a, this.ambient);
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this.ambient.a = 1;
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this.specular = lite.toStdColor(specular ? specular : "white");
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this.specular = lite.scaleColor(this.specular.a, this.specular);
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this.specular.a = 1;
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this.npr_cool = {r: 0, g: 0, b: 0.4, a: 1};
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this.npr_warm = {r: 0.4, g: 0.4, b: 0.2, a: 1};
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this.npr_alpha = 0.2;
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this.npr_beta = 0.6;
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this.npr_scale = 0.6;
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},
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constant: function(normal, finish, pigment){
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pigment = lite.toStdColor(pigment);
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var alpha = pigment.a, color = lite.scaleColor(alpha, pigment);
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color.a = alpha;
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return lite.fromStdColor(lite.saturateColor(color));
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},
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matte: function(normal, finish, pigment){
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if(typeof finish == "string"){ finish = lite.finish[finish]; }
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pigment = lite.toStdColor(pigment);
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normal = lite.faceforward(lite.normalize(normal), this.incident);
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var ambient = lite.scaleColor(finish.Ka, this.ambient),
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shadow = lite.saturate(-4 * lite.dot(normal, this.incident)),
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diffuse = lite.scaleColor(shadow * finish.Kd, lite.diffuse(normal, this.lights)),
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color = lite.scaleColor(pigment.a, lite.multiplyColor(pigment, lite.addColor(ambient, diffuse)));
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color.a = pigment.a;
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return lite.fromStdColor(lite.saturateColor(color));
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},
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metal: function(normal, finish, pigment){
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if(typeof finish == "string"){ finish = lite.finish[finish]; }
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pigment = lite.toStdColor(pigment);
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normal = lite.faceforward(lite.normalize(normal), this.incident);
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var v = lite.scale(-1, this.incident), specular, color,
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ambient = lite.scaleColor(finish.Ka, this.ambient),
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shadow = lite.saturate(-4 * lite.dot(normal, this.incident));
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if("phong" in finish){
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specular = lite.scaleColor(shadow * finish.Ks * finish.phong, lite.phong(normal, v, finish.phong_size, this.lights));
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}else{
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specular = lite.scaleColor(shadow * finish.Ks, lite.specular(normal, v, finish.roughness, this.lights));
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}
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color = lite.scaleColor(pigment.a, lite.addColor(lite.multiplyColor(pigment, ambient), lite.multiplyColor(this.specular, specular)));
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color.a = pigment.a;
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return lite.fromStdColor(lite.saturateColor(color));
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},
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plastic: function(normal, finish, pigment){
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if(typeof finish == "string"){ finish = lite.finish[finish]; }
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pigment = lite.toStdColor(pigment);
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normal = lite.faceforward(lite.normalize(normal), this.incident);
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var v = lite.scale(-1, this.incident), specular, color,
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ambient = lite.scaleColor(finish.Ka, this.ambient),
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shadow = lite.saturate(-4 * lite.dot(normal, this.incident)),
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diffuse = lite.scaleColor(shadow * finish.Kd, lite.diffuse(normal, this.lights));
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if("phong" in finish){
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specular = lite.scaleColor(shadow * finish.Ks * finish.phong, lite.phong(normal, v, finish.phong_size, this.lights));
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}else{
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specular = lite.scaleColor(shadow * finish.Ks, lite.specular(normal, v, finish.roughness, this.lights));
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}
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color = lite.scaleColor(pigment.a, lite.addColor(lite.multiplyColor(pigment, lite.addColor(ambient, diffuse)), lite.multiplyColor(this.specular, specular)));
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color.a = pigment.a;
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return lite.fromStdColor(lite.saturateColor(color));
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},
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npr: function(normal, finish, pigment){
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if(typeof finish == "string"){ finish = lite.finish[finish]; }
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pigment = lite.toStdColor(pigment);
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normal = lite.faceforward(lite.normalize(normal), this.incident);
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var ambient = lite.scaleColor(finish.Ka, this.ambient),
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shadow = lite.saturate(-4 * lite.dot(normal, this.incident)),
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diffuse = lite.scaleColor(shadow * finish.Kd, lite.diffuse(normal, this.lights)),
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color = lite.scaleColor(pigment.a, lite.multiplyColor(pigment, lite.addColor(ambient, diffuse))),
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cool = lite.addColor(this.npr_cool, lite.scaleColor(this.npr_alpha, color)),
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warm = lite.addColor(this.npr_warm, lite.scaleColor(this.npr_beta, color)),
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d = (1 + lite.dot(this.incident, normal)) / 2,
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color = lite.scaleColor(this.npr_scale, lite.addColor(color, lite.mixColor(cool, warm, d)));
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color.a = pigment.a;
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return lite.fromStdColor(lite.saturateColor(color));
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}
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});
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})();
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// POV-Ray basic finishes
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dojox.gfx3d.lighting.finish = {
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// Default
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defaults: {Ka: 0.1, Kd: 0.6, Ks: 0.0, roughness: 0.05},
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dull: {Ka: 0.1, Kd: 0.6, Ks: 0.5, roughness: 0.15},
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shiny: {Ka: 0.1, Kd: 0.6, Ks: 1.0, roughness: 0.001},
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glossy: {Ka: 0.1, Kd: 0.6, Ks: 1.0, roughness: 0.0001},
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phong_dull: {Ka: 0.1, Kd: 0.6, Ks: 0.5, phong: 0.5, phong_size: 1},
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phong_shiny: {Ka: 0.1, Kd: 0.6, Ks: 1.0, phong: 1.0, phong_size: 200},
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phong_glossy: {Ka: 0.1, Kd: 0.6, Ks: 1.0, phong: 1.0, phong_size: 300},
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luminous: {Ka: 1.0, Kd: 0.0, Ks: 0.0, roughness: 0.05},
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// Metals
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// very soft and dull
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metalA: {Ka: 0.35, Kd: 0.3, Ks: 0.8, roughness: 1/20},
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// fairly soft and dull
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metalB: {Ka: 0.30, Kd: 0.4, Ks: 0.7, roughness: 1/60},
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// medium reflectivity, holds color well
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metalC: {Ka: 0.25, Kd: 0.5, Ks: 0.8, roughness: 1/80},
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// highly hard and polished, high reflectivity
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metalD: {Ka: 0.15, Kd: 0.6, Ks: 0.8, roughness: 1/100},
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// very highly polished and reflective
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metalE: {Ka: 0.10, Kd: 0.7, Ks: 0.8, roughness: 1/120}
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};
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}
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