Ini adalah satu lagi karya animasi 3D berdasarkan HTML5 Canvas Ia adalah kesan khas animasi hayunan pakaian 3D yang boleh berkibar ditiup angin, yang sangat realistik. Apabila kita meluncurkan tetikus ke atas pakaian, pakaian akan mempunyai animasi bergoyang Apabila kita mengklik tetikus, pakaian akan dihayun dengan lebih ganas.
Kod XML/HTMLSalin kandungan ke papan keratan
- <div gaya="lebar:500px;margin :10px auto">
-
<kanvas id="cv" lebar="480" tinggi="300">kanvas>
-
<p>demo "3D on 2D Canvas"< /p>
-
<p>gerakkan kursor ke pan / klik untuk mengayun< ;/p>
-
div>
Kod JavaScriptSalin kandungan ke papan keratan
- tetingkap.P3D = {
-
tekstur: null,
-
g: null
- };
-
-
P3D.clear = fungsi(f, w, h) {
-
var g = ini.g;
- g.beginPath();
- g.fillStyle = f;
- g.fillRect(0, 0, w, h);
-
- }
-
-
P3D.num_cmp = fungsi(a,b){kembali a-b;}
-
-
P3D.drawTriangle = fungsi(poss, uvs, shade_clr) {
-
var w = ini.texture.width;
-
var h = ini.texture.height;
-
-
var g = ini.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 = baharu M22();
- m._11 = vA[0];
- m._12 = vA[1];
- m._21 = vB[0];
- m._22 = vB[1];
-
-
var im = m.getInvert();
-
jika (!im) kembali palsu;
-
-
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);
-
-
-
var bx = [wu, wu vA[0], wu vB[0]];
-
var oleh = [hv, hv vA[1], hv vB[1]];
-
- bx.sort(P3D.num_cmp);
- mengikut.sort(P3D.num_cmp);
-
-
var bw = bx[2] - bx[0];
-
var bh = oleh[2] - oleh[0];
-
-
jika ((bx[0] bw) <= (w-1)) bw ;
- jika ((oleh[0] bh) <= (h-1)) bh ;
- jika (bx[0] >= 1) {bx[0]--; bw ;}
-
jika (oleh[0] >= 1) {oleh[0]--; bh ;}
-
-
g.drawImage(ini.tekstur, bx[0], oleh[0], bw, bh, bx[0], oleh[0], bw, bh);
-
-
jika (shade_clr) {
- g.fillStyle = shade_clr;
- g.fillRect(bx[0], oleh[0], bw, bh);
- }
-
- g.restore();
-
-
kembali benar;
- }
-
-
P3D.drawTestByIndexBuffer = fungsi(pos_buf, ix_buf, pemusnahan) {
-
var g = ini.g;
-
-
jika ((ix_buf.length%3) != 0)
-
lontar "panjang penampan indeks tidak sah!";
-
-
var len = ix_buf.length/3;
-
-
var i, ibase, vbase;
-
var poss = [{},{},{}];
- g.strokeWidth = 1;
-
untuk (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 ];
-
-
-
- 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))*cull) < 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 = fungsi(pos_buf, ix_buf, tx_buf, culling, z_clip) {
- var w, h;
- var color_polygon = !ini.tekstur;
- jika (ini.tekstur) {
- w = ini.tekstur.lebar;
- h = ini.tekstur.tinggi;
- }
-
- var g = ini.g;
- var m = baharu M22();
-
- jika (!pemusnahan) pemusnahan = 0;
-
- jika ((ix_buf.length%3) != 0)
- lontar "panjang penampan indeks tidak sah!";
-
- 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;
-
- untuk (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];
- jika (z_clip && (pos_buf[vbase] < 0 || pos_buf[vbase] > 1)) {ibase = 2; teruskan;}
-
-
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];
- jika (z_clip && (pos_buf[vbase] < 0 || pos_buf[vbase] > 1)) { ibase; teruskan;}
-
-
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];
- jika (z_clip && (pos_buf[vbase] < 0 || pos_buf[vbase] > 1)) {teruskan 🎜>;}
-
-
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 ] ;
-
-
- jika( (((vAd[0] * vCd[1]) - (vAd[1] * vCd[0]))*culling) < ; 0)
- teruskan;
-
- jika (warna_poligon) {
- 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();
- teruskan;
- }
-
- 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();
- jika (!im) { teruskan;}
-
- 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);
-
-
- var bx = [wu, wu vA[0], wu vB[0]];
- var oleh = [hv, hv vA[1], hv vB[1]];
-
- bx.sort(P3D.num_cmp);
- mengikut.sort(P3D.num_cmp);
-
- var bw = bx[2] - bx[0];
- var bra = oleh[2] - oleh[0];
-
- jika ((bx[0] bw) <= (w-1)) bw ;
- jika ((oleh[0] coli) <= (h-1)) bra ;
- jika (bx[0] >= 1) {bx[0]--; bw ;}
-
jika (oleh[0] >= 1) {oleh[0]--; coli ;}
-
-
g.drawImage(ini.tekstur, bx[0], oleh[0], bw, bh, bx[0], oleh[0], bw, coli);
-
-
-
-
-
-
- g.restore();
-
- }
-
- }
-
-
fungsi Vec3(_x, _y, _z)
- {
-
ini.x = _x || 0;
-
ini.y = _y || 0;
-
ini.z = _z || 0;
- }
-
- Vec3.prototype = {
-
sifar: fungsi() {
-
ini.x = ini.y = ini.z = 0;
- },
-
-
sub: fungsi(v) {
-
ini.x -= v.x;
-
ini.y -= v.y;
-
ini.z -= v.z;
-
-
kembali ini;
- },
-
-
tambah: fungsi(v) {
-
ini.x = v.x;
-
ini.y = v.y;
-
ini.z = v.z;
-
-
kembali ini;
- },
-
-
salinan Daripada: fungsi(v) {
-
ini.x = v.x;
-
ini.y = v.y;
-
ini.z = v.z;
-
-
kembali ini;
- },
-
-
norma:fungsi() {
-
kembali Math.sqrt(ini.x*ini.x ini.y*ini.y ini.z *ini.z);
- },
-
-
normalkan: fungsi() {
-
var nrm = Math.sqrt(ini.x*ini.x ini.y*ini.y ini .z*ini.z);
-
jika (nrm != 0)
- {
-
ini.x /= nrm;
-
ini.y /= nrm;
-
ini.z /= nrm;
- }
-
kembali ini;
- },
-
-
smul: fungsi(k) {
-
ini.x *= k;
-
ini.y *= k;
-
ini.z *= k;
-
-
kembali ini;
- },
-
-
dpDengan: fungsi(v) {
-
kembali ini.x*v.x ini. y*v.y ini.z*v.z;
- },
-
-
cp: fungsi(v, w) {
-
ini.x = (w.y * v.z) - (w.z * v.y);
-
ini.y = (w.z * v.x) - (w.x * v.z);
-
ini.z = (w.x * v.y) - (w.y * v.x);
-
-
kembali ini;
- },
-
-
kepadaString: fungsi() {
-
kembali ini.x ", " ini.y "," ini.z;
- }
- }
-
-
fungsi M44(cpy)
- {
-
jika (cpy)
-
ini.copyFrom(cpy);
-
lain {
-
ini.ident();
- }
- }
-
- M44.prototype = {
-
ident: fungsi() {
-
ini._12 = ini._13 = iniini
._14 = 0; -
ini._21 = ini._23 = ini
ini- ._24 = 0;
ini._31 = ini._32 = ini
- iniini._34 = 0;
ini._41 = ini
._42 = - ini
._43 = 0; -
ini._11 = ini._22 = ini
._33 = - ini
._44 = 1; -
kembali
- ini;
},
-
-
salinan Daripada: fungsi(m) {
-
ini._11 = m._11;
-
ini._12 = m._12;
-
ini._13 = m._13;
-
ini._14 = m._14;
-
-
ini._21 = m._21;
-
ini._22 = m._22;
-
ini._23 = m._23;
-
ini._24 = m._24;
-
-
ini._31 = m._31;
-
ini._32 = m._32;
-
ini._33 = m._33;
-
ini._34 = m._34;
-
-
ini._41 = m._41;
-
ini._42 = m._42;
-
ini._43 = m._43;
-
ini._44 = m._44;
-
-
kembali ini;
- },
-
-
transVec3: fungsi(keluar, x, y, z) {
-
keluar[0] = x * ini._11 y * ini._21 z > ini._31 ini._41;
- keluar[1] = x * ini._12 y * ini._22 z > ini._32 ini._42;
keluar[2] = x * -
ini._13 y * ini._23 z > ini._33 ini._43;
keluar[3] = x *
- ini._14 y * ini._24 z > ini._34 ini._44;
},
-
-
transVec3Rot: fungsi(keluar, x, y, z) {
-
keluar[0] = x * ini._11 y * ini._21 z > ini._31;
- keluar[1] = x * ini._12 y * ini._22 z > ini._32;
keluar[2] = x * -
ini._13 y * ini._23 z > ini._33;
},
-
-
perspektifLH:
- fungsi(vw, vh, z_near, z_far) {
- ini._11 = 2.0*z_near/vw;
- ini._12 = 0;
- ini._13 = 0;
- ini._14 = 0;
-
- ini._21 = 0;
- ini._22 = 2*z_near/vh;
- ini._23 = 0;
- ini._24 = 0;
-
- ini._31 = 0;
- ini._32 = 0;
- ini._33 = z_far/(z_far-z_near);
- ini._34 = 1;
-
- ini._41 = 0;
- ini._42 = 0;
- ini._43 = z_near*z_far/(z_near-z_far);
- ini._44 = 0;
-
- kembali ini;
},
-
-
lookAtLH: fungsi(aUp, aFrom, aAt) {
-
var aX = baharu Vec3();
-
var aY = baharu Vec3();
-
-
var aZ = baharu Vec3(aAt.x, aAt.y, aAt.z);
- aZ.sub(aFrom).normalize();
-
- aX.cp(aUp, aZ).normalize();
- aY.cp(aZ, aX);
-
-
ini._11 = aX.x; ini._12 = aY.x; ini._13 = aZ.x; ini._14 = 0;
-
ini._21 = aX.y; ini._22 = aY.y; ini._23 = aZ.y; ini._24 = 0;
-
ini._31 = aX.z; ini._32 = aY.z; ini._33 = aZ.z; ini._34 = 0;
-
-
ini._41 = -aFrom.dpWith(aX);
-
ini._42 = -aFrom.dpWith(aY);
-
ini._43 = -aFrom.dpWith(aZ);
-
ini._44 = 1;
-
-
kembali ini;
- },
-
-
mul: fungsi(A, B) {
-
ini._11 = A._11*B._11 A._12*B._21 A._13*B._31 A._11 A._12*B._21 A._13*B._31 A._14 ;
-
ini._12 = A._11*B._12 A._12*B._22 A._13*B._32 A._12 A._12*B._22 A._13*B._32 A._12 ;
-
ini._13 = A._11*B._13 A._12*B._23 A._13*B._33 A._13 A._12*B._23 A._13*B._33 A._14 ;
-
ini._14 = A._11*B._14 A._12*B._24 A._13*B._34 A._44 ;
-
-
ini._21 = A._21*B._11 A._22*B._21 A._23*B._31 A._24 ;
-
ini._22 = A._21*B._12 A._22*B._22 A._23*B._32 A._24 ;
-
ini._23 = A._21*B._13 A._22*B._23 A._23*B._33 A._24 ;
-
ini._24 = A._21*B._14 A._22*B._24 A._23*B._34 A._44 ;
-
-
ini._31 = A._31*B._11 A._32*B._21 A._33*B._31 A._44 ;
-
ini._32 = A._31*B._12 A._32*B._22 A._33*B._32 B._44 ;
-
ini._33 = A._31*B._13 A._32*B._23 A._33*B._33 A._34 ;
-
ini._34 = A._31*B._14 A._32*B._24 A._33*B._34 A._44 ;
-
-
ini._41 = A._41*B._11 A._42*B._21 A._43*B._31 A._44 ;
-
ini._42 = A._41*B._12 A._42*B._22 A._43*B._32 A._44 ;
-
ini._43 = A._41*B._13 A._42*B._23 A._43*B._33 A._44 ;
-
ini._44 = A._41*B._14 A._42*B._24 A._43*B._34 A._44 ;
-
-
kembali ini;
- },
-
-
übersetzen: Funktion(x, y, z) {
-
dieses._11 = 1; dies._12 = 0; dies._13 = 0; dieses._14 = 0;
-
dieses._21 = 0; dieses._22 = 1; dieses._23 = 0; dieses._24 = 0;
-
dieses._31 = 0; dieses._32 = 0; dieses._33 = 1; dieses._34 = 0;
-
-
dieses._41 = x; dies._42 = y; dieses._43 = z; dieses._44 = 1;
-
zurückgeben dies;
- },
-
-
transpose33: Funktion() {
-
var t;
-
-
t = dieses._12;
-
dieses._12 = dieses._21;
-
dieses._21 = t;
-
-
t = dies._13;
-
dieses._13 = dieses._31;
-
dieses._31 = t;
-
-
t = dies._23;
-
dieses._23 = dieses._32;
-
dieses._32 = t;
-
-
zurückgeben dies;
- },
-
-
-
glRotate: Funktion(Winkel, 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;
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-