如何使用HTML5实现3D衣服摇摆动画特效
发表于：2025-01-16 作者：千家信息网编辑
千家信息网最后更新 2025年01月16日，今天就跟大家聊聊有关如何使用HTML5实现3D衣服摇摆动画特效，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。这又是一款基于HTML5 Canv
千家信息网最后更新 2025年01月16日如何使用HTML5实现3D衣服摇摆动画特效
今天就跟大家聊聊有关如何使用HTML5实现3D衣服摇摆动画特效，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
这又是一款基于HTML5 Canvas的3D动画杰作，它是一个可以随风飘动的3D衣服摇摆动画特效，非常逼真。当我们将鼠标滑过衣服时，衣服将会出现摇摆的动画，点击鼠标时，衣服将会更加剧烈地摆动。
HTML代码
XML/HTML Code复制内容到剪贴板
- P3D库JS代码，主要用来处理3D效果的JavaScript Code复制内容到剪贴板window.P3D = { texture: null, g: null }; P3D.clear = function(f, w, h) { var g = this.g; g.beginPath(); g.fillStyle = f; g.fillRect(0, 0, w, h); } P3D.num_cmp = function(a,b){return a-b;} P3D.drawTriangle = function(poss, uvs, shade_clr) { var w = this.texture.width; var h = this.texture.height; var g = this.g; var vAd = [ poss[1].x - poss[0].x , poss[1].y - poss[0].y ]; var vBd = [ poss[2].x - poss[0].x , poss[2].y - poss[0].y ]; var vA = [ uvs[1].u - uvs[0].u , uvs[1].v - uvs[0].v ]; var vB = [ uvs[2].u - uvs[0].u , uvs[2].v - uvs[0].v ]; vA[0] *= w; vA[1] *= h; vB[0] *= w; vB[1] *= h; var m = new M22(); m._11 = vA[0]; m._12 = vA[1]; m._21 = vB[0]; m._22 = vB[1]; var im = m.getInvert(); if (!im) return false; var a = im._11 * vAd[0] + im._12 * vBd[0]; var b = im._21 * vAd[0] + im._22 * vBd[0]; var c = im._11 * vAd[1] + im._12 * vBd[1]; var d = im._21 * vAd[1] + im._22 * vBd[1]; var wu = uvs[0].u * w; var hv = uvs[0].v * h; var du = wu * a + hv * b; var dv = wu * c + hv * d; g.save(); g.beginPath(); g.moveTo(poss[0].x, poss[0].y); g.lineTo(poss[1].x, poss[1].y); g.lineTo(poss[2].x, poss[2].y); g.clip(); g.transform(a, c, b, d, poss[0].x - du, poss[0].y - dv); // bounds var bx = [wu, wu+vA[0], wu+vB[0]]; var by = [hv, hv+vA[1], hv+vB[1]]; bx.sort(P3D.num_cmp); by.sort(P3D.num_cmp); var bw = bx[2] - bx[0]; var bh = by[2] - by[0]; if ((bx[0]+bw) <= (w-1)) bw++; if ((by[0]+bh) <= (h-1)) bh++; if (bx[0] >= 1) {bx[0]--; bw++;} if (by[0] >= 1) {by[0]--; bh++;} g.drawImage(this.texture, bx[0], by[0], bw, bh, bx[0], by[0], bw, bh); if (shade_clr) { g.fillStyle = shade_clr; g.fillRect(bx[0], by[0], bw, bh); } g.restore(); return true; } P3D.drawTestByIndexBuffer = function(pos_buf, ix_buf, culling) { var g = this.g; if ((ix_buf.length%3) != 0) throw "invalid index buffer length!"; var len = ix_buf.length/3; var i, ibase, vbase; var poss = [{},{},{}]; g.strokeWidth = 1; for (i = 0, ibase = 0;i < len;++i) { vbase = ix_buf[ibase++] << 2; poss[0].x = pos_buf[vbase++]; poss[0].y = pos_buf[vbase ]; vbase = ix_buf[ibase++] << 2; poss[1].x = pos_buf[vbase++]; poss[1].y = pos_buf[vbase ]; vbase = ix_buf[ibase++] << 2; poss[2].x = pos_buf[vbase++]; poss[2].y = pos_buf[vbase ]; // z component of cross product < 0 ? var Ax = poss[1].x - poss[0].x; var Ay = poss[1].y - poss[0].y; var Cx = poss[2].x - poss[1].x; var Cy = poss[2].y - poss[1].y; var cull = ( (((Ax * Cy) - (Ay * Cx))*culling) < 0); g.beginPath(); g.strokeStyle = cull ? "#592" : "#0f0"; g.moveTo(poss[0].x, poss[0].y); g.lineTo(poss[1].x, poss[1].y); g.lineTo(poss[2].x, poss[2].y); g.lineTo(poss[0].x, poss[0].y); g.stroke(); } } P3D.drawByIndexBuffer = function(pos_buf, ix_buf, tx_buf, culling, z_clip) { var w, h; var color_polygon = !this.texture; if (this.texture) { w = this.texture.width; h = this.texture.height; } var g = this.g; var m = new M22(); if (!culling) culling = 0; if ((ix_buf.length%3) != 0) throw "invalid index buffer length!"; var i, ibase, vbase, tbase, poss = [{},{},{}]; var len = ix_buf.length/3; var uv_0u, uv_0v, uv_1u, uv_1v, uv_2u, uv_2v; for (i = 0, ibase = 0;i < len;++i) { tbase = ix_buf[ibase++] << 1 vbase = tbase << 1; poss[0].x = pos_buf[vbase++]; uv_0u = tx_buf[tbase++]; poss[0].y = pos_buf[vbase++]; uv_0v = tx_buf[tbase]; if (z_clip && (pos_buf[vbase] < 0 || pos_buf[vbase] > 1)) {ibase += 2; continue;} tbase = ix_buf[ibase++] << 1 vbase = tbase << 1; poss[1].x = pos_buf[vbase++]; uv_1u = tx_buf[tbase++]; poss[1].y = pos_buf[vbase++]; uv_1v = tx_buf[tbase]; if (z_clip && (pos_buf[vbase] < 0 || pos_buf[vbase] > 1)) {++ibase; continue;} tbase = ix_buf[ibase++] << 1 vbase = tbase << 1; poss[2].x = pos_buf[vbase++]; uv_2u = tx_buf[tbase++]; poss[2].y = pos_buf[vbase++]; uv_2v = tx_buf[tbase]; if (z_clip && (pos_buf[vbase] < 0 || pos_buf[vbase] > 1)) {continue;} var vAd = [ poss[1].x - poss[0].x , poss[1].y - poss[0].y ]; var vBd = [ poss[2].x - poss[0].x , poss[2].y - poss[0].y ]; var vCd = [ poss[2].x - poss[1].x , poss[2].y - poss[1].y ]; // z component of cross product < 0 ? if( (((vAd[0] * vCd[1]) - (vAd[1] * vCd[0]))*culling) < 0) continue; if (color_polygon) { g.fillStyle = uv_0u; g.beginPath(); g.moveTo(poss[0].x, poss[0].y); g.lineTo(poss[1].x, poss[1].y); g.lineTo(poss[2].x, poss[2].y); g.fill(); continue; } var vA = [ uv_1u - uv_0u , uv_1v - uv_0v ]; var vB = [ uv_2u - uv_0u , uv_2v - uv_0v ]; vA[0] *= w; vA[1] *= h; vB[0] *= w; vB[1] *= h; m._11 = vA[0]; m._12 = vA[1]; m._21 = vB[0]; m._22 = vB[1]; var im = m.getInvert(); if (!im) { continue;} var a = im._11 * vAd[0] + im._12 * vBd[0]; var b = im._21 * vAd[0] + im._22 * vBd[0]; var c = im._11 * vAd[1] + im._12 * vBd[1]; var d = im._21 * vAd[1] + im._22 * vBd[1]; var wu = uv_0u * w; var hv = uv_0v * h; var du = wu * a + hv * b; var dv = wu * c + hv * d; g.save(); g.beginPath(); g.moveTo(poss[0].x, poss[0].y); g.lineTo(poss[1].x, poss[1].y); g.lineTo(poss[2].x, poss[2].y); g.clip(); g.transform(a, c, b, d, poss[0].x - du, poss[0].y - dv); // bounds var bx = [wu, wu+vA[0], wu+vB[0]]; var by = [hv, hv+vA[1], hv+vB[1]]; bx.sort(P3D.num_cmp); by.sort(P3D.num_cmp); var bw = bx[2] - bx[0]; var bh = by[2] - by[0]; if ((bx[0]+bw) <= (w-1)) bw++; if ((by[0]+bh) <= (h-1)) bh++; if (bx[0] >= 1) {bx[0]--; bw++;} if (by[0] >= 1) {by[0]--; bh++;} g.drawImage(this.texture, bx[0], by[0], bw, bh, bx[0], by[0], bw, bh); /* if (shade_clr) { g.fillStyle = shade_clr; g.fillRect(bx[0], by[0], bw, bh); } */ g.restore(); } } function Vec3(_x, _y, _z) { this.x = _x || 0; this.y = _y || 0; this.z = _z || 0; } Vec3.prototype = { zero: function() { this.x = this.y = this.z = 0; }, sub: function(v) { this.x -= v.x; this.y -= v.y; this.z -= v.z; return this; }, add: function(v) { this.x += v.x; this.y += v.y; this.z += v.z; return this; }, copyFrom: function(v) { this.x = v.x; this.y = v.y; this.z = v.z; return this; }, norm:function() { return Math.sqrt(this.x*this.x + this.y*this.y + this.z*this.z); }, normalize: function() { var nrm = Math.sqrt(this.x*this.x + this.y*this.y + this.z*this.z); if (nrm != 0) { this.x /= nrm; this.y /= nrm; this.z /= nrm; } return this; }, smul: function(k) { this.x *= k; this.y *= k; this.z *= k; return this; }, dpWith: function(v) { return this.x*v.x + this.y*v.y + this.z*v.z; }, cp: function(v, w) { this.x = (w.y * v.z) - (w.z * v.y); this.y = (w.z * v.x) - (w.x * v.z); this.z = (w.x * v.y) - (w.y * v.x); return this; }, toString: function() { return this.x + ", " + this.y + "," + this.z; } } function M44(cpy) { if (cpy) this.copyFrom(cpy); else { this.ident(); } } M44.prototype = { ident: function() { this._12 = this._13 = this._14 = 0; this._21 = this._23 = this._24 = 0; this._31 = this._32 = this._34 = 0; this._41 = this._42 = this._43 = 0; this._11 = this._22 = this._33 = this._44 = 1; return this; }, copyFrom: function(m) { this._11 = m._11; this._12 = m._12; this._13 = m._13; this._14 = m._14; this._21 = m._21; this._22 = m._22; this._23 = m._23; this._24 = m._24; this._31 = m._31; this._32 = m._32; this._33 = m._33; this._34 = m._34; this._41 = m._41; this._42 = m._42; this._43 = m._43; this._44 = m._44; return this; }, transVec3: function(out, x, y, z) { out[0] = x * this._11 + y * this._21 + z * this._31 + this._41; out[1] = x * this._12 + y * this._22 + z * this._32 + this._42; out[2] = x * this._13 + y * this._23 + z * this._33 + this._43; out[3] = x * this._14 + y * this._24 + z * this._34 + this._44; }, transVec3Rot: function(out, x, y, z) { out[0] = x * this._11 + y * this._21 + z * this._31; out[1] = x * this._12 + y * this._22 + z * this._32; out[2] = x * this._13 + y * this._23 + z * this._33; }, perspectiveLH: function(vw, vh, z_near, z_far) { this._11 = 2.0*z_near/vw; this._12 = 0; this._13 = 0; this._14 = 0; this._21 = 0; this._22 = 2*z_near/vh; this._23 = 0; this._24 = 0; this._31 = 0; this._32 = 0; this._33 = z_far/(z_far-z_near); this._34 = 1; this._41 = 0; this._42 = 0; this._43 = z_near*z_far/(z_near-z_far); this._44 = 0; return this; }, lookAtLH: function(aUp, aFrom, aAt) { var aX = new Vec3(); var aY = new Vec3(); var aZ = new Vec3(aAt.x, aAt.y, aAt.z); aZ.sub(aFrom).normalize(); aX.cp(aUp, aZ).normalize(); aY.cp(aZ, aX); this._11 = aX.x; this._12 = aY.x; this._13 = aZ.x; this._14 = 0; this._21 = aX.y; this._22 = aY.y; this._23 = aZ.y; this._24 = 0; this._31 = aX.z; this._32 = aY.z; this._33 = aZ.z; this._34 = 0; this._41 = -aFrom.dpWith(aX); this._42 = -aFrom.dpWith(aY); this._43 = -aFrom.dpWith(aZ); this._44 = 1; return this; }, mul: function(A, B) { this._11 = A._11*B._11 + A._12*B._21 + A._13*B._31 + A._14*B._41; this._12 = A._11*B._12 + A._12*B._22 + A._13*B._32 + A._14*B._42; this._13 = A._11*B._13 + A._12*B._23 + A._13*B._33 + A._14*B._43; this._14 = A._11*B._14 + A._12*B._24 + A._13*B._34 + A._14*B._44; this._21 = A._21*B._11 + A._22*B._21 + A._23*B._31 + A._24*B._41; this._22 = A._21*B._12 + A._22*B._22 + A._23*B._32 + A._24*B._42; this._23 = A._21*B._13 + A._22*B._23 + A._23*B._33 + A._24*B._43; this._24 = A._21*B._14 + A._22*B._24 + A._23*B._34 + A._24*B._44; this._31 = A._31*B._11 + A._32*B._21 + A._33*B._31 + A._34*B._41; this._32 = A._31*B._12 + A._32*B._22 + A._33*B._32 + A._34*B._42; this._33 = A._31*B._13 + A._32*B._23 + A._33*B._33 + A._34*B._43; this._34 = A._31*B._14 + A._32*B._24 + A._33*B._34 + A._34*B._44; this._41 = A._41*B._11 + A._42*B._21 + A._43*B._31 + A._44*B._41; this._42 = A._41*B._12 + A._42*B._22 + A._43*B._32 + A._44*B._42; this._43 = A._41*B._13 + A._42*B._23 + A._43*B._33 + A._44*B._43; this._44 = A._41*B._14 + A._42*B._24 + A._43*B._34 + A._44*B._44; return this; }, translate: function(x, y, z) { this._11 = 1; this._12 = 0; this._13 = 0; this._14 = 0; this._21 = 0; this._22 = 1; this._23 = 0; this._24 = 0; this._31 = 0; this._32 = 0; this._33 = 1; this._34 = 0; this._41 = x; this._42 = y; this._43 = z; this._44 = 1; return this; }, transpose33: function() { var t; t = this._12; this._12 = this._21; this._21 = t; t = this._13; this._13 = this._31; this._31 = t; t = this._23; this._23 = this._32; this._32 = t; return this; }, // OpenGL style rotation glRotate: function(angle, x, y, z) { var s = Math.sin( angle ); var c = Math.cos( angle ); var xx = x * x; var yy = y * y; var zz = z * z; var xy = x * y; var yz = y * z; var zx = z * x; var xs = x * s; var ys = y * s; var zs = z * s; var one_c = 1.0 - c; /* this._11 = (one_c * xx) + c; this._21 = (one_c * xy) - zs; this._31 = (one_c * zx) + ys; this._41 = 0; this._12 = (one_c * xy) + zs; this._22 = (one_c * yy) + c; this._32 = (one_c * yz) - xs; this._42 = 0; this._13 = (one_c * zx) - ys; this._23 = (one_c * yz) + xs; this._33 = (one_c * zz) + c; this._43 = 0; this._14 = 0; this._24 = 0; this._34 = 0; this._44 = 1; */ this._11 = (one_c * xx) + c; this._12 = (one_c * xy) - zs; this._13 = (one_c * zx) + ys; this._14 = 0; this._21 = (one_c * xy) + zs; this._22 = (one_c * yy) + c; this._23 = (one_c * yz) - xs; this._24 = 0; this._31 = (one_c * zx) - ys; this._32 = (one_c * yz) + xs; this._33 = (one_c * zz) + c; this._34 = 0; this._41 = 0; this._42 = 0; this._43 = 0; this._44 = 1; return this; } } // matrix 2x2 function M22() { this._11 = 1; this._12 = 0; this._21 = 0; this._22 = 1; } M22.prototype.getInvert = function() { var out = new M22(); var det = this._11 * this._22 - this._12 * this._21; if (det > -0.0001 && det < 0.0001) return null; out._11 = this._22 / det; out._22 = this._11 / det; out._12 = -this._12 / det; out._21 = -this._21 / det; return out; }
"3D on 2D Canvas" demo
move cursor to pan / click to swing
3D衣服动画JS代码
JavaScript Code复制内容到剪贴板
function ClothApp() { this.canvas = document.getElementById("cv"); P3D.g = this.canvas.getContext("2d"); var tex = new Image(); this.texture1 = tex; tex.onload = function(){ _this.start(); }; tex.src = "20090226032826.gif"; tex = new Image(); this.texture2 = tex; tex.onload = function(){ _this.start(); }; tex.src = "20090226032825.png"; this.mLoadCount = 2; this.mTickCount = 0; this.G = 0.53; this.G1 = 0.45; this.mProjMat = null; this.mViewMat = null; this.mViewFrom = new Vec3(); this.mViewFrom.y = -150; this.mViewFrom.z = 1000; this.mViewFromA = (new Vec3()).copyFrom(this.mViewFrom); this.mViewAngle = 0; this.mNLen = 0; this.mNodes = []; this.mRenderTris = null; this.mLTNode = null; this.mRTNode = null; this.mLTNodeV = new Vec3(); this.mRTNodeV = new Vec3(); this.mWForce = new Vec3(); this.frate = 15; var _this = this; } ClothApp.zsortCmp = function(t1, t2) { return t2.sortKey - t1.sortKey; } ClothApp.prototype = { start: function() { if (--this.mLoadCount != 0) return; this.vUP = new Vec3(0, 1, 0); this.vAT = new Vec3(0, 80, 0); this.mViewport = {}; this.mViewport.w = 480; this.mViewport.h = 300; this.mViewport.ow = 240; this.mViewport.oh = 150; this.setupTransforms(); this.generateCloth(180); this.generateRenderTriangles(); var _this = this; this.canvas.addEventListener("mousemove", function(e){_this.onMouseMove(e);}, false); this.canvas.addEventListener("mousedown", function(e){_this.onClick(e);}, false); window.setTimeout(function(){_this.onInterval();}, this.frate); }, onInterval: function() { this.mTickCount++; // this.mLTNodeV.z = Math.cos(this.mTickCount*0.1) * 2; this.tick(); this.updatePosition(); this.draw(); var _this = this; window.setTimeout(function(){_this.onInterval();}, this.frate); }, onMouseMove: function(e) { if (e.clientX || e.clientX == 0) this.mViewAngle = (e.clientX - 240) * 0.004; if (e.clientY || e.clientY == 0) this.mViewFromA.y = 90 - (e.clientY - 0) * 0.8; }, onClick: function(e) { if (e.clientX || e.clientX == 0) { this.mWForce.z = -4; this.mWForce.x = (e.clientX - 240) * -0.03; } }, tick: function() { this.updateViewTrans(this.mViewAngle); var nlen = this.mNodes.length; var i, nd; for(i = 0;i < nlen;i++) { nd = this.mNodes[i]; nd.F.x = 0; nd.F.z = 0; if (nd.flags & 4) nd.F.y = -this.G1; else nd.F.y = -this.G; nd.F.add(this.mWForce); } this.mWForce.zero(); this.applyTension(); for(i = 0;i < nlen;i++) { nd = this.mNodes[i]; if ((nd.flags&1) != 0) { nd.F.sub(nd.F); } nd.velo.add(nd.F); } this.mLTNode.velo.copyFrom(this.mLTNodeV); this.mRTNode.velo.copyFrom(this.mRTNodeV); }, updatePosition: function() { var nlen = this.mNodes.length; var i, nd; for(i = 0;i < nlen;i++) { nd = this.mNodes[i]; if ((nd.flags&1) != 0) { nd.cv.x = 0; nd.cv.y = 0; nd.cv.z = 0; } nd.pos.add(nd.velo); nd.velo.sub(nd.cv); nd.cv.x = 0; nd.cv.y = 0; nd.cv.z = 0; nd.velo.smul(0.95); } }, draw: function() { P3D.clear("#000", this.mViewport.w, this.mViewport.h); this.transformPolygons(); this.mRenderTris.sort(ClothApp.zsortCmp); var len = this.mRenderTris.length; var t, sh; for (var i = 0;i < len;i++) { t = this.mRenderTris[i]; if (P3D.texture != t.texture) P3D.texture = t.texture; sh = undefined; if (t.lighting && t.shade > 0.01) sh = "rgba(0,0,0,"+t.shade+")"; P3D.drawTriangle(t.tposs, t.uvs, sh); } }, applyTension: function() { var i, k, nd; var v = new Vec3(); var nlen = this.mNodes.length; var naturalLen = this.mNLen; for (k = 0;k < nlen;k++) { nd = this.mNodes[k]; var F = nd.F; for (i = 0;i < 4;i++) { var nbr = nd.links[i]; if (!nbr) continue; var len = v.copyFrom(nbr.pos).sub(nd.pos).norm(); var dlen = len - naturalLen; if (dlen > 0) { v.smul(dlen * 0.5 / len); F.x += v.x; F.y += v.y; F.z += v.z; nd.cv.add(v.smul(0.8)); } } } }, setupTransforms: function() { this.mProjMat = new M44(); this.mProjMat.perspectiveLH(24, 15, 10, 9000); this.mViewMat = new M44(); this.updateViewTrans(0); }, updateViewTrans: function(ry) { this.mViewFromA.z = Math.cos(ry) * 380; this.mViewFromA.x = Math.sin(ry) * 380; this.mViewFrom.smul(0.7); this.mViewFrom.x += this.mViewFromA.x * 0.3; this.mViewFrom.y += this.mViewFromA.y * 0.3; this.mViewFrom.z += this.mViewFromA.z * 0.3; this.mViewMat.lookAtLH(this.vUP, this.mViewFrom, this.vAT); }, generateCloth: function(base_y) { var cols = 9; var rows = 8; var step = 22; this.mNLen = step*0.9; var w = (cols-1) * step; var i, k; for (k = 0;k < rows;k++) { for (i = 0;i < cols;i++) { var nd = new ClothNode(); nd.pos.x = -(w/2) + i*step; nd.pos.y = base_y -k*step/2; nd.pos.z = k*16; nd.uv.u = i / (cols-1); nd.uv.v = k / (rows-1); if (i > 0) { var prv_nd = this.mNodes[this.mNodes.length-1]; prv_nd.links[1] = nd; nd.links[0] = prv_nd; } if (k > 0) { var up_nd = this.mNodes[this.mNodes.length-cols]; up_nd.links[4] = nd; nd.links[3] = up_nd; } if (i != 0 && i != 4 && i != (cols-1)) nd.flags |= 4; this.mNodes.push(nd); } } // fix left-top and right-top this.mNodes[0 ].flags |= 1; this.mNodes[4 ].flags |= 1; this.mNodes[cols-1].flags |= 1; this.mLTNode = this.mNodes[0 ]; this.mRTNode = this.mNodes[cols-1]; }, generateRenderTriangles: function() { if (!this.mRenderTris) this.mRenderTris = []; var i; var nd; var nlen = this.mNodes.length; for(i = 0;i < nlen;i++) { nd = this.mNodes[i]; if (nd.links[1] && nd.links[1].links[4]) { var t = new RenderTriangle(); t.texture = this.texture1; t.poss[0] = nd.pos; t.poss[1] = nd.links[1].pos; t.poss[2] = nd.links[1].links[4].pos; t.uvs[0] = nd.uv; t.uvs[1] = nd.links[1].uv; t.uvs[2] = nd.links[1].links[4].uv; this.mRenderTris.push(t); t = new RenderTriangle(); t.texture = this.texture1; t.poss[0] = nd.pos; t.poss[1] = nd.links[1].links[4].pos; t.poss[2] = nd.links[4].pos; t.uvs[0] = nd.uv; t.uvs[1] = nd.links[1].links[4].uv; t.uvs[2] = nd.links[4].uv; this.mRenderTris.push(t); } } this.addBGTriangles(this.mNodes[0].pos.y); }, addBGTriangles: function(by) { var cols = 4; var t, x, y, sz = 110; var ox = -(cols*sz)/2; var oz = -(cols*sz)/2; for (y = 0;y < cols;y++) { for (x = 0;x < cols;x++) { var bv = ((x+y)&1) * 0.5; t = new RenderTriangle(); t.texture = this.texture2; t.poss[0] = new Vec3(ox + x*sz , by, oz + y*sz ); t.poss[1] = new Vec3(ox + x*sz + sz, by, oz + y*sz ); t.poss[2] = new Vec3(ox + x*sz , by, oz + y*sz + sz); t.uvs[0] = {u:0 , v:bv }; t.uvs[1] = {u:0.5, v:bv }; t.uvs[2] = {u:0 , v:bv+0.5}; if ((x==1 || x==2) && (y==1 || y==2)) this.modifyRoofUV(t, x == 2, bv); t.lighting = false; t.zBias = 0.5; this.mRenderTris.push(t); t = new RenderTriangle(); t.texture = this.texture2; t.poss[0] = new Vec3(ox + x*sz , by, oz + y*sz + sz); t.poss[1] = new Vec3(ox + x*sz + sz, by, oz + y*sz ); t.poss[2] = new Vec3(ox + x*sz + sz, by, oz + y*sz + sz); t.uvs[0] = {u:0 , v:bv+0.5}; t.uvs[1] = {u:0.5, v:bv }; t.uvs[2] = {u:0.5, v:bv+0.5}; if ((x==1 || x==2) && (y==1 || y==2)) this.modifyRoofUV(t, x == 2, bv); t.lighting = false; t.zBias = 0.5; this.mRenderTris.push(t); } } }, modifyRoofUV: function(t, rv, bv) { if (rv) { t.uvs[0].u = 0.5 - t.uvs[0].u; t.uvs[1].u = 0.5 - t.uvs[1].u; t.uvs[2].u = 0.5 - t.uvs[2].u; } t.uvs[0].u += 0.5; t.uvs[1].u += 0.5; t.uvs[2].u += 0.5; if (rv) { t.uvs[0].v = 0.5 - t.uvs[0].v + bv + bv; t.uvs[1].v = 0.5 - t.uvs[1].v + bv + bv; t.uvs[2].v = 0.5 - t.uvs[2].v + bv + bv; } }, transformPolygons: function() { var trans = new M44(); trans.mul(this.mViewMat, this.mProjMat); var hw = this.mViewport.ow; var hh = this.mViewport.oh; var len = this.mRenderTris.length; var t; var spos = [0, 0, 0, 0]; for (var i = 0;i < len;i++) { t = this.mRenderTris[i]; for (var k = 0;k < 3;k++) { trans.transVec3(spos, t.poss[k].x, t.poss[k].y, t.poss[k].z); var W = spos[3]; spos[0] /= W; spos[1] /= W; spos[2] /= W; spos[0] *= this.mViewport.w; spos[1] *= -this.mViewport.h; spos[0] += hw; spos[1] += hh; t.tposs[k].x = spos[0]; t.tposs[k].y = spos[1]; t.tposs[k].z = spos[2]; } var v1 = (new Vec3()).copyFrom(t.poss[1]).sub(t.poss[0]).normalize(); var v2 = (new Vec3()).copyFrom(t.poss[2]).sub(t.poss[1]).normalize(); var N = (new Vec3()).cp(v1, v2); trans.transVec3Rot(spos, N.x, N.y, N.z); if (t.lighting) { if (spos[2] > 0) t.shade = 0.8 else { t.shade = 0.1 - N.y * 0.6; if (t.shade < 0) t.shade = 0; } } t.sortKey = Math.floor( (t.tposs[0].z + t.tposs[1].z + t.tposs[2].z + t.zBias) *1000 ); } } } function ClothNode() { this.flags = 0; this.pos = new Vec3(); this.velo = new Vec3(); this.cv = new Vec3(); this.F = new Vec3(); this.links = [null, null, null, null]; this.uv = {u:0, v:0}; } function RenderTriangle() { this.texture = null; this.poss = new Array(3); this.tposs = [new Vec3(), new Vec3(), new Vec3()]; this.uvs = [{u:0, v:0}, {u:0, v:0}, {u:0, v:0}]; this.shade = 0; this.lighting = true; this.zBias = 0; this.sortKey = 0; }
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