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Diffstat (limited to 'includes/js/dojox/gfx3d/lighting.js')
| -rw-r--r-- | includes/js/dojox/gfx3d/lighting.js | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/includes/js/dojox/gfx3d/lighting.js b/includes/js/dojox/gfx3d/lighting.js new file mode 100644 index 0000000..bbd40de --- /dev/null +++ b/includes/js/dojox/gfx3d/lighting.js @@ -0,0 +1,241 @@ +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} +}; + +} |