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+if(!dojo._hasResource["dojox.gfx3d.lighting"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.gfx3d.lighting"] = true;
+dojo.provide("dojox.gfx3d.lighting");
+dojo.require("dojox.gfx._base");
+
+(function(){
+ var lite = dojox.gfx3d.lighting;
+
+ dojo.mixin(dojox.gfx3d.lighting, {
+ // color utilities
+ black: function(){
+ return {r: 0, g: 0, b: 0, a: 1};
+ },
+ white: function(){
+ return {r: 1, g: 1, b: 1, a: 1};
+ },
+ toStdColor: function(c){
+ c = dojox.gfx.normalizeColor(c);
+ return {r: c.r / 255, g: c.g / 255, b: c.b / 255, a: c.a};
+ },
+ fromStdColor: function(c){
+ return new dojo.Color([Math.round(255 * c.r), Math.round(255 * c.g), Math.round(255 * c.b), c.a]);
+ },
+ scaleColor: function(s, c){
+ return {r: s * c.r, g: s * c.g, b: s * c.b, a: s * c.a};
+ },
+ addColor: function(a, b){
+ return {r: a.r + b.r, g: a.g + b.g, b: a.b + b.b, a: a.a + b.a};
+ },
+ multiplyColor: function(a, b){
+ return {r: a.r * b.r, g: a.g * b.g, b: a.b * b.b, a: a.a * b.a};
+ },
+ saturateColor: function(c){
+ return {
+ r: c.r < 0 ? 0 : c.r > 1 ? 1 : c.r,
+ g: c.g < 0 ? 0 : c.g > 1 ? 1 : c.g,
+ b: c.b < 0 ? 0 : c.b > 1 ? 1 : c.b,
+ a: c.a < 0 ? 0 : c.a > 1 ? 1 : c.a
+ };
+ },
+ mixColor: function(c1, c2, s){
+ return lite.addColor(lite.scaleColor(s, c1), lite.scaleColor(1 - s, c2));
+ },
+ diff2Color: function(c1, c2){
+ var r = c1.r - c2.r;
+ var g = c1.g - c2.g;
+ var b = c1.b - c2.b;
+ var a = c1.a - c2.a;
+ return r * r + g * g + b * b + a * a;
+ },
+ length2Color: function(c){
+ return c.r * c.r + c.g * c.g + c.b * c.b + c.a * c.a;
+ },
+
+ // vector utilities
+ //TODO: move vector utilities from this file to vector.js
+ dot: function(a, b){
+ return a.x * b.x + a.y * b.y + a.z * b.z;
+ },
+ scale: function(s, v){
+ return {x: s * v.x, y: s * v.y, z: s * v.z};
+ },
+ add: function(a, b){
+ return {x: a.x + b.x, y: a.y + b.y, z: a.z + b.z};
+ },
+ saturate: function(v){
+ return Math.min(Math.max(v, 0), 1);
+ },
+ length: function(v){
+ return Math.sqrt(dojox.gfx3d.lighting.dot(v, v));
+ },
+ normalize: function(v){
+ return lite.scale(1 / lite.length(v), v);
+ },
+ faceforward: function(n, i){
+ var p = dojox.gfx3d.lighting;
+ var s = p.dot(i, n) < 0 ? 1 : -1;
+ return p.scale(s, n);
+ },
+ reflect: function(i, n){
+ var p = dojox.gfx3d.lighting;
+ return p.add(i, p.scale(-2 * p.dot(i, n), n));
+ },
+
+ // lighting utilities
+ diffuse: function(normal, lights){
+ var c = lite.black();
+ for(var i = 0; i < lights.length; ++i){
+ var l = lights[i],
+ d = lite.dot(lite.normalize(l.direction), normal);
+ c = lite.addColor(c, lite.scaleColor(d, l.color));
+ }
+ return lite.saturateColor(c);
+ },
+ specular: function(normal, v, roughness, lights){
+ var c = lite.black();
+ for(var i = 0; i < lights.length; ++i){
+ var l = lights[i],
+ h = lite.normalize(lite.add(lite.normalize(l.direction), v)),
+ s = Math.pow(Math.max(0, lite.dot(normal, h)), 1 / roughness);
+ c = lite.addColor(c, lite.scaleColor(s, l.color));
+ }
+ return lite.saturateColor(c);
+ },
+ phong: function(normal, v, size, lights){
+ normal = lite.normalize(normal);
+ var c = lite.black();
+ for(var i = 0; i < lights.length; ++i){
+ var l = lights[i],
+ r = lite.reflect(lite.scale(-1, lite.normalize(v)), normal),
+ s = Math.pow(Math.max(0, lite.dot(r, lite.normalize(l.direction))), size);
+ c = lite.addColor(c, lite.scaleColor(s, l.color));
+ }
+ return lite.saturateColor(c);
+ }
+ });
+
+ // this lighting model is derived from RenderMan Interface Specification Version 3.2
+
+ dojo.declare("dojox.gfx3d.lighting.Model", null, {
+ constructor: function(incident, lights, ambient, specular){
+ this.incident = lite.normalize(incident);
+ this.lights = [];
+ for(var i = 0; i < lights.length; ++i){
+ var l = lights[i];
+ this.lights.push({direction: lite.normalize(l.direction), color: lite.toStdColor(l.color)});
+ }
+ this.ambient = lite.toStdColor(ambient.color ? ambient.color : "white");
+ this.ambient = lite.scaleColor(ambient.intensity, this.ambient);
+ this.ambient = lite.scaleColor(this.ambient.a, this.ambient);
+ this.ambient.a = 1;
+ this.specular = lite.toStdColor(specular ? specular : "white");
+ this.specular = lite.scaleColor(this.specular.a, this.specular);
+ this.specular.a = 1;
+ this.npr_cool = {r: 0, g: 0, b: 0.4, a: 1};
+ this.npr_warm = {r: 0.4, g: 0.4, b: 0.2, a: 1};
+ this.npr_alpha = 0.2;
+ this.npr_beta = 0.6;
+ this.npr_scale = 0.6;
+ },
+ constant: function(normal, finish, pigment){
+ pigment = lite.toStdColor(pigment);
+ var alpha = pigment.a, color = lite.scaleColor(alpha, pigment);
+ color.a = alpha;
+ return lite.fromStdColor(lite.saturateColor(color));
+ },
+ matte: function(normal, finish, pigment){
+ if(typeof finish == "string"){ finish = lite.finish[finish]; }
+ pigment = lite.toStdColor(pigment);
+ normal = lite.faceforward(lite.normalize(normal), this.incident);
+ var ambient = lite.scaleColor(finish.Ka, this.ambient),
+ shadow = lite.saturate(-4 * lite.dot(normal, this.incident)),
+ diffuse = lite.scaleColor(shadow * finish.Kd, lite.diffuse(normal, this.lights)),
+ color = lite.scaleColor(pigment.a, lite.multiplyColor(pigment, lite.addColor(ambient, diffuse)));
+ color.a = pigment.a;
+ return lite.fromStdColor(lite.saturateColor(color));
+ },
+ metal: function(normal, finish, pigment){
+ if(typeof finish == "string"){ finish = lite.finish[finish]; }
+ pigment = lite.toStdColor(pigment);
+ normal = lite.faceforward(lite.normalize(normal), this.incident);
+ var v = lite.scale(-1, this.incident), specular, color,
+ ambient = lite.scaleColor(finish.Ka, this.ambient),
+ shadow = lite.saturate(-4 * lite.dot(normal, this.incident));
+ if("phong" in finish){
+ specular = lite.scaleColor(shadow * finish.Ks * finish.phong, lite.phong(normal, v, finish.phong_size, this.lights));
+ }else{
+ specular = lite.scaleColor(shadow * finish.Ks, lite.specular(normal, v, finish.roughness, this.lights));
+ }
+ color = lite.scaleColor(pigment.a, lite.addColor(lite.multiplyColor(pigment, ambient), lite.multiplyColor(this.specular, specular)));
+ color.a = pigment.a;
+ return lite.fromStdColor(lite.saturateColor(color));
+ },
+ plastic: function(normal, finish, pigment){
+ if(typeof finish == "string"){ finish = lite.finish[finish]; }
+ pigment = lite.toStdColor(pigment);
+ normal = lite.faceforward(lite.normalize(normal), this.incident);
+ var v = lite.scale(-1, this.incident), specular, color,
+ ambient = lite.scaleColor(finish.Ka, this.ambient),
+ shadow = lite.saturate(-4 * lite.dot(normal, this.incident)),
+ diffuse = lite.scaleColor(shadow * finish.Kd, lite.diffuse(normal, this.lights));
+ if("phong" in finish){
+ specular = lite.scaleColor(shadow * finish.Ks * finish.phong, lite.phong(normal, v, finish.phong_size, this.lights));
+ }else{
+ specular = lite.scaleColor(shadow * finish.Ks, lite.specular(normal, v, finish.roughness, this.lights));
+ }
+ color = lite.scaleColor(pigment.a, lite.addColor(lite.multiplyColor(pigment, lite.addColor(ambient, diffuse)), lite.multiplyColor(this.specular, specular)));
+ color.a = pigment.a;
+ return lite.fromStdColor(lite.saturateColor(color));
+ },
+ npr: function(normal, finish, pigment){
+ if(typeof finish == "string"){ finish = lite.finish[finish]; }
+ pigment = lite.toStdColor(pigment);
+ normal = lite.faceforward(lite.normalize(normal), this.incident);
+ var ambient = lite.scaleColor(finish.Ka, this.ambient),
+ shadow = lite.saturate(-4 * lite.dot(normal, this.incident)),
+ diffuse = lite.scaleColor(shadow * finish.Kd, lite.diffuse(normal, this.lights)),
+ color = lite.scaleColor(pigment.a, lite.multiplyColor(pigment, lite.addColor(ambient, diffuse))),
+ cool = lite.addColor(this.npr_cool, lite.scaleColor(this.npr_alpha, color)),
+ warm = lite.addColor(this.npr_warm, lite.scaleColor(this.npr_beta, color)),
+ d = (1 + lite.dot(this.incident, normal)) / 2,
+ color = lite.scaleColor(this.npr_scale, lite.addColor(color, lite.mixColor(cool, warm, d)));
+ color.a = pigment.a;
+ return lite.fromStdColor(lite.saturateColor(color));
+ }
+ });
+})();
+
+// POV-Ray basic finishes
+
+dojox.gfx3d.lighting.finish = {
+
+ // Default
+
+ defaults: {Ka: 0.1, Kd: 0.6, Ks: 0.0, roughness: 0.05},
+
+ dull: {Ka: 0.1, Kd: 0.6, Ks: 0.5, roughness: 0.15},
+ shiny: {Ka: 0.1, Kd: 0.6, Ks: 1.0, roughness: 0.001},
+ glossy: {Ka: 0.1, Kd: 0.6, Ks: 1.0, roughness: 0.0001},
+
+ phong_dull: {Ka: 0.1, Kd: 0.6, Ks: 0.5, phong: 0.5, phong_size: 1},
+ phong_shiny: {Ka: 0.1, Kd: 0.6, Ks: 1.0, phong: 1.0, phong_size: 200},
+ phong_glossy: {Ka: 0.1, Kd: 0.6, Ks: 1.0, phong: 1.0, phong_size: 300},
+
+ luminous: {Ka: 1.0, Kd: 0.0, Ks: 0.0, roughness: 0.05},
+
+ // Metals
+
+ // very soft and dull
+ metalA: {Ka: 0.35, Kd: 0.3, Ks: 0.8, roughness: 1/20},
+ // fairly soft and dull
+ metalB: {Ka: 0.30, Kd: 0.4, Ks: 0.7, roughness: 1/60},
+ // medium reflectivity, holds color well
+ metalC: {Ka: 0.25, Kd: 0.5, Ks: 0.8, roughness: 1/80},
+ // highly hard and polished, high reflectivity
+ metalD: {Ka: 0.15, Kd: 0.6, Ks: 0.8, roughness: 1/100},
+ // very highly polished and reflective
+ metalE: {Ka: 0.10, Kd: 0.7, Ks: 0.8, roughness: 1/120}
+};
+
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 09:45:43 +0000