| New file |
|---|
| 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} |
| }; |
| |
| } |